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Münks J, Yogeswaran A, Antoine TK, Blumrich LA, Dorfmüller P, Ghofrani HA, Assmus B, Schermuly RT, Sydykov A. A Novel Rat Model of Mild Pulmonary Hypertension Associated with Pulmonary Venous Congestion Induced by Left Pulmonary Vein Banding. Int J Mol Sci 2024; 25:2827. [PMID: 38474074 DOI: 10.3390/ijms25052827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 02/21/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024] Open
Abstract
Pulmonary hypertension (PH) associated with left heart disease (PH-LHD) is the most common form of PH. In PH-LHD, changes in the pulmonary vasculature are assumed to be mainly caused by pulmonary venous congestion. However, the underlying mechanisms of this form of PH are poorly understood. We aimed to establish a model of PH associated with pulmonary venous congestion. Wistar-Kyoto rats underwent partial occlusion of the left pulmonary vein to induce pulmonary venous congestion or sham surgery and were assessed at various time points post-surgery (3, 6, 9, 12 weeks). In vivo cardiopulmonary phenotyping was performed by using echocardiography along with heart catheterization. Histomorphometry methods were used to assess pulmonary vascular remodeling (e.g., wall thickness, degree of muscularization). Left pulmonary vein banding (PVB) resulted in mildly elevated right ventricular systolic pressure and moderate right ventricular hypertrophy. In PVB rats, small- and medium-sized pulmonary vessels in the left lung were characterized by increased wall thickness and muscularization. Taken together, our data demonstrate that left PVB-induced pulmonary venous congestion is associated with pulmonary vascular remodeling and mild PH.
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Affiliation(s)
- Jonas Münks
- Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Athiththan Yogeswaran
- Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Tobiah Kevin Antoine
- Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Leonhard Anton Blumrich
- Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Peter Dorfmüller
- Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
- Department of Pathology, Universities of Giessen and Marburg Lung Center (UGMLC), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Hossein Ardeschir Ghofrani
- Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Birgit Assmus
- Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
- Department of Cardiology and Angiology, Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Ralph Theo Schermuly
- Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Akylbek Sydykov
- Excellence Cluster Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
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Mamazhakypov A, Maripov A, Sarybaev AS, Schermuly RT, Sydykov A. Mast Cells in Cardiac Remodeling: Focus on the Right Ventricle. J Cardiovasc Dev Dis 2024; 11:54. [PMID: 38392268 PMCID: PMC10889421 DOI: 10.3390/jcdd11020054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/31/2024] [Accepted: 02/02/2024] [Indexed: 02/24/2024] Open
Abstract
In response to various stressors, cardiac chambers undergo structural remodeling. Long-term exposure of the right ventricle (RV) to pressure or volume overload leads to its maladaptive remodeling, associated with RV failure and increased mortality. While left ventricular adverse remodeling is well understood and therapeutic options are available or emerging, RV remodeling remains underexplored, and no specific therapies are currently available. Accumulating evidence implicates the role of mast cells in RV remodeling. Mast cells produce and release numerous inflammatory mediators, growth factors and proteases that can adversely affect cardiac cells, thus contributing to cardiac remodeling. Recent experimental findings suggest that mast cells might represent a potential therapeutic target. This review examines the role of mast cells in cardiac remodeling, with a specific focus on RV remodeling, and explores the potential efficacy of therapeutic interventions targeting mast cells to mitigate adverse RV remodeling.
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Affiliation(s)
- Argen Mamazhakypov
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary Institute (CPI), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Abdirashit Maripov
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan
| | - Akpay S Sarybaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan
| | - Ralph Theo Schermuly
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary Institute (CPI), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Akylbek Sydykov
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary Institute (CPI), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
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Mamazhakypov A, Veith C, Schermuly RT, Sydykov A. Surgical protocol for pulmonary artery banding in mice to generate a model of pressure-overload-induced right ventricular failure. STAR Protoc 2023; 4:102660. [PMID: 37883225 PMCID: PMC10630677 DOI: 10.1016/j.xpro.2023.102660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/02/2023] [Accepted: 09/29/2023] [Indexed: 10/28/2023] Open
Abstract
Right ventricular failure (RVF) is the leading cause of death in patients with pulmonary hypertension. Here, we present a protocol for pulmonary artery banding in mice to generate a model of pressure-overload-induced RVF. We describe steps for anesthesia of mice, endotracheal intubation, and pulmonary artery banding surgery. We then detail procedures for phenotyping and analysis. Our approach does not involve complete blockage of the pulmonary flow during clip placement and is, therefore, associated with low intraoperative mortality. For complete details on the use and execution of this protocol, please refer to Veith et al. (2020).1.
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Affiliation(s)
- Argen Mamazhakypov
- Department of Internal Medicine, Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Christine Veith
- Department of Internal Medicine, Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Ralph Theo Schermuly
- Department of Internal Medicine, Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany.
| | - Akylbek Sydykov
- Department of Internal Medicine, Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany.
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Mamazhakypov A, Maripov A, Sarybaev AS, Schermuly RT, Sydykov A. Osteopontin in Pulmonary Hypertension. Biomedicines 2023; 11:biomedicines11051385. [PMID: 37239056 DOI: 10.3390/biomedicines11051385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/01/2023] [Accepted: 05/05/2023] [Indexed: 05/28/2023] Open
Abstract
Pulmonary hypertension (PH) is a pathological condition with multifactorial etiology, which is characterized by elevated pulmonary arterial pressure and pulmonary vascular remodeling. The underlying pathogenetic mechanisms remain poorly understood. Accumulating clinical evidence suggests that circulating osteopontin may serve as a biomarker of PH progression, severity, and prognosis, as well as an indicator of maladaptive right ventricular remodeling and dysfunction. Moreover, preclinical studies in rodent models have implicated osteopontin in PH pathogenesis. Osteopontin modulates a plethora of cellular processes within the pulmonary vasculature, including cell proliferation, migration, apoptosis, extracellular matrix synthesis, and inflammation via binding to various receptors such as integrins and CD44. In this article, we provide a comprehensive overview of the current understanding of osteopontin regulation and its impact on pulmonary vascular remodeling, as well as consider research issues required for the development of therapeutics targeting osteopontin as a potential strategy for the management of PH.
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Affiliation(s)
- Argen Mamazhakypov
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary Institute (CPI), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Abdirashit Maripov
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan
| | - Akpay S Sarybaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan
| | - Ralph Theo Schermuly
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary Institute (CPI), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Akylbek Sydykov
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary Institute (CPI), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
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Schäfer K, Tello K, Pak O, Richter M, Gierhardt M, Kwapiszewska G, Veith C, Fink L, Gall H, Hecker M, Kojonazarov B, Kraut S, Lo K, Wilhelm J, Grimminger F, Seeger W, Schermuly RT, Ghofrani HA, Zahner D, Gerstberger R, Weissmann N, Sydykov A, Sommer N. Decreased plasma levels of the brain-derived neurotrophic factor correlate with right heart congestion in pulmonary arterial hypertension. ERJ Open Res 2023; 9:00230-2022. [PMID: 36891080 PMCID: PMC9986749 DOI: 10.1183/23120541.00230-2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 09/28/2022] [Indexed: 01/27/2023] Open
Abstract
Background The brain-derived neurotrophic factor (BDNF) may promote development of pulmonary hypertension and right ventricular (RV) failure. However, BDNF plasma levels were decreased in patients with left ventricular (LV) failure. Therefore, we investigated BDNF plasma levels in pulmonary hypertension patients and the role of BDNF in mouse models of pulmonary hypertension and isolated RV failure. Methods BDNF plasma levels were correlated to pulmonary hypertension in two patient cohorts, including either post- and pre-capillary pulmonary hypertension patients (first cohort) or only pre-capillary pulmonary hypertension patients (second cohort). In the second cohort, RV dimensions and load-independent function were determined by imaging and pressure-volume catheter measurements, respectively. For induction of isolated RV pressure overload, heterozygous Bdnf knockout (Bdnf+/- ) mice were subjected to pulmonary arterial banding (PAB). For induction of pulmonary hypertension, mice with inducible knockout of BDNF in smooth muscle cells (Bdnf/Smmhc knockout) were exposed to chronic hypoxia. Results Plasma BDNF levels were decreased in patients with pulmonary hypertension. Following adjustment for covariables, BDNF levels negatively correlated in both cohorts with central venous pressure. In the second cohort, BDNF levels additionally negatively correlated with RV dilatation. In animal models, BDNF downregulation attenuated RV dilatation in Bdnf+ /- mice after PAB or hypoxic Bdnf/Smmhc knockout mice, although they developed pulmonary hypertension to a similar extent. Conclusions Similar to LV failure, circulating levels of BDNF were decreased in pulmonary hypertension patients, and low BDNF levels were associated with right heart congestion. Decreased BDNF levels did not worsen RV dilatation in animal models, and thus, may be the consequence, but not the cause of RV dilatation.
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Affiliation(s)
- Katharina Schäfer
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany.,These authors contributed equally
| | - Khodr Tello
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany.,These authors contributed equally
| | - Oleg Pak
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany.,These authors contributed equally
| | - Manuel Richter
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | - Mareike Gierhardt
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany.,Instituto de Investigación en Biomedicina de Buenos Aires (IBioBA) - CONICET - Partner Institute of the Max Planck Society, Buenos Aires, Argentina
| | - Grazyna Kwapiszewska
- Ludwig Boltzmann Institute for Lung Vascular Research, Otto Loewi research Center, Medical University Graz, Graz, Austria.,Institute for Lung Health (ILH), Giessen, Germany
| | - Christine Veith
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | - Ludger Fink
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | - Henning Gall
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | - Matthias Hecker
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | | | - Simone Kraut
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | - Kevin Lo
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | - Jochen Wilhelm
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany.,Institute for Lung Health (ILH), Giessen, Germany
| | - Friedrich Grimminger
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | - Werner Seeger
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany.,Institute for Lung Health (ILH), Giessen, Germany
| | - Ralph T Schermuly
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | - Hossein A Ghofrani
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany.,Department of Medicine, Imperial College London, London, UK
| | - Daniel Zahner
- Central Laboratory Animal Facility, Justus-Liebig University, Giessen, Germany
| | - Rüdiger Gerstberger
- Institute of Veterinary Physiology and Biochemistry, Justus-Liebig University, Giessen, Germany
| | - Norbert Weissmann
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany
| | - Akylbek Sydykov
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany.,These authors contributed equally
| | - Natascha Sommer
- Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus-Liebig University, Giessen, Germany.,These authors contributed equally
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Mamazhakypov A, Sartmyrzaeva M, Sarybaev AS, Schermuly R, Sydykov A. Clinical and Molecular Implications of Osteopontin in Heart Failure. Curr Issues Mol Biol 2022; 44:3573-3597. [PMID: 36005141 PMCID: PMC9406846 DOI: 10.3390/cimb44080245] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/04/2022] [Accepted: 08/08/2022] [Indexed: 11/16/2022] Open
Abstract
The matricellular protein osteopontin modulates cell-matrix interactions during tissue injury and healing. A complex multidomain structure of osteopontin enables it not only to bind diverse cell receptors but also to interact with various partners, including other extracellular matrix proteins, cytokines, and growth factors. Numerous studies have implicated osteopontin in the development and progression of myocardial remodeling in diverse cardiac diseases. Osteopontin influences myocardial remodeling by regulating extracellular matrix production, the activity of matrix metalloproteinases and various growth factors, inflammatory cell recruitment, myofibroblast differentiation, cardiomyocyte apoptosis, and myocardial vascularization. The exploitation of osteopontin loss- and gain-of-function approaches in rodent models provided an opportunity for assessment of the cell- and disease-specific contribution of osteopontin to myocardial remodeling. In this review, we summarize the recent knowledge on osteopontin regulation and its impact on various cardiac diseases, as well as delineate complex disease- and cell-specific roles of osteopontin in cardiac pathologies. We also discuss the current progress of therapeutics targeting osteopontin that may facilitate the development of a novel strategy for heart failure treatment.
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Affiliation(s)
- Argen Mamazhakypov
- Department of Internal Medicine, German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Meerim Sartmyrzaeva
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan
| | - Akpay Sh. Sarybaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan
| | - Ralph Schermuly
- Department of Internal Medicine, German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Akylbek Sydykov
- Department of Internal Medicine, German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany
- Correspondence:
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Kojonazarov B, Sydykov A, Pullamsetti SS, Luitel H, Dahal BK, Kosanovic D, Tian X, Majewski M, Baumann C, Evans S, Phillips P, Fairman D, Davie N, Wayman C, Kilty I, Weissmann N, Grimminger F, Seeger W, Ghofrani HA, Schermuly RT. Corrigendum to "Effects of multikinase inhibitors on pressure overload-induced right ventricular remodeling" [International Journal of Cardiology 167 (2013) 2630-2637]. Int J Cardiol 2022; 357:152-153. [PMID: 35367072 DOI: 10.1016/j.ijcard.2022.03.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Baktybek Kojonazarov
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Akylbek Sydykov
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Soni Savai Pullamsetti
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany; Department of Lung Development and Remodelling, Max-Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Himal Luitel
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Bhola K Dahal
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Djuro Kosanovic
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Xia Tian
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Matthaeus Majewski
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Christin Baumann
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Steve Evans
- Pfizer Global Research and Development, Sandwich, United Kingdom
| | - Peter Phillips
- Pfizer Global Research and Development, Sandwich, United Kingdom
| | - David Fairman
- Pfizer Global Research and Development, Sandwich, United Kingdom
| | - Neil Davie
- Pfizer Global Research and Development, Sandwich, United Kingdom
| | - Chris Wayman
- Pfizer Global Research and Development, Sandwich, United Kingdom
| | - Iain Kilty
- Pfizer Global Research and Development, Sandwich, United Kingdom
| | - Norbert Weissmann
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Friedrich Grimminger
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Werner Seeger
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany; Department of Lung Development and Remodelling, Max-Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Hossein Ardeschir Ghofrani
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany
| | - Ralph Theo Schermuly
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research, Germany.
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Veith C, Vartürk-Özcan I, Wujak M, Hadzic S, Wu CY, Knoepp F, Kraut S, Petrovic A, Gredic M, Pak O, Brosien M, Heimbrodt M, Wilhelm J, Weisel FC, Malkmus K, Schäfer K, Gall H, Tello K, Kosanovic D, Sydykov A, Sarybaev A, Günther A, Brandes RP, Seeger W, Grimminger F, Ghofrani HA, Schermuly RT, Kwapiszewska G, Sommer N, Weissmann N. SPARC, a Novel Regulator of Vascular Cell Function in Pulmonary Hypertension. Circulation 2022; 145:916-933. [PMID: 35175782 DOI: 10.1161/circulationaha.121.057001] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Pulmonary hypertension (PH) is a life-threatening disease, characterized by excessive pulmonary vascular remodeling, leading to elevated pulmonary arterial pressure and right heart hypertrophy. PH can be caused by chronic hypoxia, leading to hyper-proliferation of pulmonary arterial smooth muscle cells (PASMCs) and apoptosis-resistant pulmonary microvascular endothelial cells (PMVECs). On reexposure to normoxia, chronic hypoxia-induced PH in mice is reversible. In this study, the authors aim to identify novel candidate genes involved in pulmonary vascular remodeling specifically in the pulmonary vasculature. METHODS After microarray analysis, the authors assessed the role of SPARC (secreted protein acidic and rich in cysteine) in PH using lung tissue from idiopathic pulmonary arterial hypertension (IPAH) patients, as well as from chronically hypoxic mice. In vitro studies were conducted in primary human PASMCs and PMVECs. In vivo function of SPARC was proven in chronic hypoxia-induced PH in mice by using an adeno-associated virus-mediated Sparc knockdown approach. RESULTS C57BL/6J mice were exposed to normoxia, chronic hypoxia, or chronic hypoxia with subsequent reexposure to normoxia for different time points. Microarray analysis of the pulmonary vascular compartment after laser microdissection identified Sparc as one of the genes downregulated at all reoxygenation time points investigated. Intriguingly, SPARC was vice versa upregulated in lungs during development of hypoxia-induced PH in mice as well as in IPAH, although SPARC plasma levels were not elevated in PH. TGF-β1 (transforming growth factor β1) or HIF2A (hypoxia-inducible factor 2A) signaling pathways induced SPARC expression in human PASMCs. In loss of function studies, SPARC silencing enhanced apoptosis and reduced proliferation. In gain of function studies, elevated SPARC levels induced PASMCs, but not PMVECs, proliferation. Coculture and conditioned medium experiments revealed that PMVECs-secreted SPARC acts as a paracrine factor triggering PASMCs proliferation. Contrary to the authors' expectations, in vivo congenital Sparc knockout mice were not protected from hypoxia-induced PH, most probably because of counter-regulatory proproliferative signaling. However, adeno-associated virus-mediated Sparc knockdown in adult mice significantly improved hemodynamic and cardiac function in PH mice. CONCLUSIONS This study provides evidence for the involvement of SPARC in the pathogenesis of human PH and chronic hypoxia-induced PH in mice, most likely by affecting vascular cell function.
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Affiliation(s)
- Christine Veith
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Ipek Vartürk-Özcan
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Magdalena Wujak
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany.,Department of Medicinal Chemistry, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Toruń, Poland (M.W.)
| | - Stefan Hadzic
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Cheng-Yu Wu
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Fenja Knoepp
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Simone Kraut
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Aleksandar Petrovic
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Marija Gredic
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Oleg Pak
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Monika Brosien
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Marie Heimbrodt
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Jochen Wilhelm
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany.,Institute for Lung Health (J.W., W.S., G.K.), Justus-Liebig-University, Giessen, Germany
| | - Friederike C Weisel
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Kathrin Malkmus
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Katharina Schäfer
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Henning Gall
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Khodr Tello
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Djuro Kosanovic
- Department of Pulmonology, I.M. Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia (D.K.)
| | - Akylbek Sydykov
- Kyrgyz National Center for Cardiology and Internal Medicine and Kyrgyz Indian Mountain Biomedical Research Center, Bishkek, Kyrgyz Republic (A.Sarybaev)
| | - Akpay Sarybaev
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Andreas Günther
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Ralf P Brandes
- Institute for Cardiovascular Physiology, Goethe University, Frankfurt am Main, Germany (R.P.B.)
| | - Werner Seeger
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany.,Institute for Lung Health (J.W., W.S., G.K.), Justus-Liebig-University, Giessen, Germany
| | - Friedrich Grimminger
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Hossein A Ghofrani
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Ralph T Schermuly
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Grazyna Kwapiszewska
- Institute for Lung Health (J.W., W.S., G.K.), Justus-Liebig-University, Giessen, Germany.,Ludwig Boltzmann Institute for Lung Vascular Research and Otto Loewi Center, Physiology, Medical University of Graz, Graz, Austria (G.K.)
| | - Natascha Sommer
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
| | - Norbert Weissmann
- Excellence Cluster Cardio-Pulmonary Institute, University of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (C.V., I.V-Ö., M.W., S.H., C-Y.W., F.K., S.K., A.P., M.G., O.P., M.B., M.H., J.W., F.C.W., K.M., K.S., H.G., K.T., A.Sydykov, A.G., W.S., F.G., H.A.G., R.T.S., N.S., N.W.), Justus-Liebig-University, Giessen, Germany
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9
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Rai N, Sydykov A, Kojonazarov B, Wilhelm J, Manaud G, Veeroju S, Ruppert C, Perros F, Ghofrani HA, Weissmann N, Seeger W, Schermuly RT, Novoyatleva T. Targeting peptidyl-prolyl isomerase 1 in experimental pulmonary arterial hypertension. Eur Respir J 2022; 60:13993003.01698-2021. [PMID: 35058248 PMCID: PMC9403440 DOI: 10.1183/13993003.01698-2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 12/29/2021] [Indexed: 11/05/2022]
Abstract
Pulmonary arterial hypertension (PAH) is a progressive disease characterised by pro-proliferative and anti-apoptotic phenotype in vascular cells, leading to pulmonary vascular remodelling and right heart failure. Peptidylprolyl cis/trans isomerase, NIMA interacting 1 (Pin1), a highly conserved enzyme, which binds to and catalyses the isomerisation of specific phosphorylated Ser/Thr-Pro motifs, acting as a molecular switch in multiple coordinated cellular processes. We hypothesised that Pin1 plays a substantial role in PAH and its inhibition with a natural organic compound, Juglone, would reverse experimental pulmonary hypertension (PH).We demonstrated that the expression of Pin1 was markedly elevated in experimental PH (i.e. hypoxia induced mouse and Sugen/hypoxia induced rat models) and pulmonary arterial smooth muscle cells (PASMCs) of patients with clinical PAH. In vitro Pin1 inhibition by either Juglone treatment or siRNA knock-down resulted in an induction of apoptosis and decrease in proliferation of human pulmonary vascular cells. Stimulation with growth factors induced Pin1 expression, while its inhibition reduced the activity of numerous PAH-related transcription factors, such as hypoxia-inducible factor alpha (HIF) and signal transducer and activator of transcription (STAT). Juglone administration lowered pulmonary vascular resistance, enhanced RV function, improved pulmonary vascular and cardiac remodelling in the Sugen/hypoxia rat model of PAH and the chronic hypoxia-induced PH model in mice.Our study demonstrates that targeting of Pin1 with small molecule inhibitor, Juglone, might be an attractive future therapeutic strategy for PAH and right heart disease secondary to PAH.
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10
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Mamazhakypov A, Sartmyrzaeva M, Kushubakova N, Duishobaev M, Maripov A, Sydykov A, Sarybaev A. Right Ventricular Response to Acute Hypoxia Exposure: A Systematic Review. Front Physiol 2022; 12:786954. [PMID: 35095556 PMCID: PMC8791628 DOI: 10.3389/fphys.2021.786954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/02/2021] [Indexed: 11/26/2022] Open
Abstract
Background: Acute hypoxia exposure is associated with an elevation of pulmonary artery pressure (PAP), resulting in an increased hemodynamic load on the right ventricle (RV). In addition, hypoxia may exert direct effects on the RV. However, the RV responses to such challenges are not fully characterized. The aim of this systematic review was to describe the effects of acute hypoxia on the RV in healthy lowland adults. Methods: We systematically reviewed PubMed and Web of Science and article references from 2005 until May 2021 for prospective studies evaluating echocardiographic RV function and morphology in healthy lowland adults at sea level and upon exposure to simulated altitude or high-altitude. Results: We included 37 studies in this systematic review, 12 of which used simulated altitude and 25 were conducted in high-altitude field conditions. Eligible studies reported at least one of the RV variables, which were all based on transthoracic echocardiography assessing RV systolic and diastolic function and RV morphology. The design of these studies significantly differed in terms of mode of ascent to high-altitude, altitude level, duration of high-altitude stay, and timing of measurements. In the majority of the studies, echocardiographic examinations were performed within the first 10 days of high-altitude induction. Studies also differed widely by selectively reporting only a part of multiple RV parameters. Despite consistent increase in PAP documented in all studies, reports on the changes of RV function and morphology greatly differed between studies. Conclusion: This systematic review revealed that the study reports on the effects of acute hypoxia on the RV are controversial and inconclusive. This may be the result of significantly different study designs, non-compliance with international guidelines on RV function assessment and limited statistical power due to small sample sizes. Moreover, the potential impact of other factors such as gender, age, ethnicity, physical activity, mode of ascent and environmental factors such as temperature and humidity on RV responses to hypoxia remained unexplored. Thus, this comprehensive overview will promote reproducible research with improved study designs and methods for the future large-scale prospective studies, which eventually may provide important insights into the RV response to acute hypoxia exposure.
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Affiliation(s)
- Argen Mamazhakypov
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary Institute (CPI), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Meerim Sartmyrzaeva
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Kyrgyz Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Nadira Kushubakova
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Kyrgyz Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Melis Duishobaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Kyrgyz Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Abdirashit Maripov
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Kyrgyz Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Akylbek Sydykov
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary Institute (CPI), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
| | - Akpay Sarybaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Kyrgyz Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
- *Correspondence: Akpay Sarybaev
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11
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Gierhardt M, Pak O, Sydykov A, Kraut S, Schäffer J, Garcia C, Veith C, Zeidan EM, Brosien M, Quanz K, Esfandiary A, Saraji A, Hadzic S, Kojonazarov B, Wilhelm J, Ghofrani HA, Schermuly RT, Seeger W, Grimminger F, Herden C, Schulz R, Weissmann N, Heger J, Sommer N. Genetic deletion of p66shc and/or cyclophilin D results in decreased pulmonary vascular tone. Cardiovasc Res 2022; 118:305-315. [PMID: 33119054 PMCID: PMC8752355 DOI: 10.1093/cvr/cvaa310] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 10/15/2020] [Indexed: 11/13/2022] Open
Abstract
AIMS The pulmonary vascular tone and hypoxia-induced alterations of the pulmonary vasculature may be regulated by the mitochondrial membrane permeability transition pore (mPTP) that controls mitochondrial calcium load and apoptosis. We thus investigated, if the mitochondrial proteins p66shc and cyclophilin D (CypD) that regulate mPTP opening affect the pulmonary vascular tone. METHODS AND RESULTS Mice deficient for p66shc (p66shc-/-), CypD (CypD-/-), or both proteins (p66shc/CypD-/-) exhibited decreased pulmonary vascular resistance (PVR) compared to wild-type mice determined in isolated lungs and in vivo. In contrast, systemic arterial pressure was only lower in CypD-/- mice. As cardiac function and pulmonary vascular remodelling did not differ between genotypes, we determined alterations of vascular contractility in isolated lungs and calcium handling in pulmonary arterial smooth muscle cells (PASMC) as underlying reason for decreased PVR. Potassium chloride (KCl)-induced pulmonary vasoconstriction and KCl-induced cytosolic calcium increase determined by Fura-2 were attenuated in all gene-deficient mice. In contrast, KCl-induced mitochondrial calcium increase determined by the genetically encoded Mito-Car-GECO and calcium retention capacity were increased only in CypD-/- and p66shc/CypD-/- mitochondria indicating that decreased mPTP opening affected KCl-induced intracellular calcium peaks in these cells. All mouse strains showed a similar pulmonary vascular response to chronic hypoxia, while acute hypoxic pulmonary vasoconstriction was decreased in gene-deficient mice indicating that CypD and p66shc regulate vascular contractility but not remodelling. CONCLUSIONS We conclude that p66shc specifically regulates the pulmonary vascular tone, while CypD also affects systemic pressure. However, only CypD acts via regulation of mPTP opening and mitochondrial calcium regulation.
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MESH Headings
- Animals
- Arterial Pressure
- Calcium/metabolism
- Calcium Signaling
- Cell Proliferation
- Cells, Cultured
- Peptidyl-Prolyl Isomerase F/deficiency
- Peptidyl-Prolyl Isomerase F/genetics
- Disease Models, Animal
- Gene Deletion
- Hypertension, Pulmonary/enzymology
- Hypertension, Pulmonary/etiology
- Hypertension, Pulmonary/genetics
- Hypertension, Pulmonary/physiopathology
- Hypoxia/complications
- Mice, Inbred C57BL
- Mice, Knockout
- Mitochondria/enzymology
- Mitochondria/genetics
- Mitochondrial Permeability Transition Pore/metabolism
- Pulmonary Artery/enzymology
- Pulmonary Artery/physiopathology
- Src Homology 2 Domain-Containing, Transforming Protein 1/deficiency
- Src Homology 2 Domain-Containing, Transforming Protein 1/genetics
- Vascular Remodeling
- Vascular Resistance
- Vasoconstriction
- Mice
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Affiliation(s)
- Mareike Gierhardt
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
- Instituto de Investigación en Biomedicina de Buenos Aires (IBioBA) - CONICET - Partner Institute of the Max Planck Society, Buenos Aires, Argentina
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, Member of the German Center for Lung Research (DZL), Member of the Cardio-Pulmonary Institute (CPI), Bad Nauheim, Germany
| | - Oleg Pak
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Akylbek Sydykov
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Simone Kraut
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Julia Schäffer
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Claudia Garcia
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Christine Veith
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Esraa M Zeidan
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Minia University, El-Minia, Egypt
| | - Monika Brosien
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Karin Quanz
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Azadeh Esfandiary
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Alireza Saraji
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Stefan Hadzic
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Baktybek Kojonazarov
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
- Institute for Lung Health (ILH), Giessen, Germany
| | - Jochen Wilhelm
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
- Institute for Lung Health (ILH), Giessen, Germany
| | - Hossein A Ghofrani
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
- Department of Medicine, Imperial College London, Du Cane Road, Hammersmith Campus, London, W12 0NN, UK
| | - Ralph T Schermuly
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Werner Seeger
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, Member of the German Center for Lung Research (DZL), Member of the Cardio-Pulmonary Institute (CPI), Bad Nauheim, Germany
| | - Friedrich Grimminger
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Christiane Herden
- Institute of Veterinary Pathology, Justus-Liebig University, Giessen, Germany
| | - Rainer Schulz
- Institute of Physiology, Justus-Liebig University, Giessen, Germany
| | - Norbert Weissmann
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
| | - Jacqueline Heger
- Institute of Physiology, Justus-Liebig University, Giessen, Germany
| | - Natascha Sommer
- Excellence Cluster Cardio Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig University, Giessen, Germany
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12
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Naryzhnaya NV, Maslov LN, Derkachev IA, Ma H, Zhang Y, Prasad NR, Singh N, Fu F, Pei JM, Sarybaev A, Sydykov A. The effect of adaptation to hypoxia on cardiac tolerance to ischemia/reperfusion. J Biomed Res 2022:1-25. [PMID: 37183617 PMCID: PMC10387748 DOI: 10.7555/jbr.36.20220125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The acute myocardial infarction (AMI) and sudden cardiac death (SCD), both associated with acute cardiac ischemia, are one of the leading causes of adult death in economically developed countries. The development of new approaches for the treatment and prevention of AMI and SCD remains the highest priority for medicine. A study on the cardiovascular effects of chronic hypoxia (CH) may contribute to the development of these methods. Chronic hypoxia exerts both positive and adverse effects. The positive effects are the infarct-reducing, vasoprotective, and antiarrhythmic effects, which can lead to the improvement of cardiac contractility in reperfusion. The adverse effects are pulmonary hypertension and right ventricular hypertrophy. This review presents a comprehensive overview of how CH enhances cardiac tolerance to ischemia/reperfusion. It is an in-depth analysis of the published data on the underlying mechanisms, which can lead to future development of the cardioprotective effect of CH. A better understanding of the CH-activated protective signaling pathways may contribute to new therapeutic approaches in an increase of cardiac tolerance to ischemia/reperfusion.
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13
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Shihan M, Novoyatleva T, Lehmeyer T, Sydykov A, Schermuly RT. Role of the Purinergic P2Y2 Receptor in Pulmonary Hypertension. Int J Environ Res Public Health 2021; 18:ijerph182111009. [PMID: 34769531 PMCID: PMC8582672 DOI: 10.3390/ijerph182111009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 11/29/2022]
Abstract
Pulmonary arterial hypertension (PAH), group 1 pulmonary hypertension (PH), is a fatal disease that is characterized by vasoconstriction, increased pressure in the pulmonary arteries, and right heart failure. PAH can be described by abnormal vascular remodeling, hyperproliferation in the vasculature, endothelial cell dysfunction, and vascular tone dysregulation. The disease pathomechanisms, however, are as yet not fully understood at the molecular level. Purinergic receptors P2Y within the G-protein-coupled receptor family play a major role in fluid shear stress transduction, proliferation, migration, and vascular tone regulation in systemic circulation, but less is known about their contribution in PAH. Hence, studies that focus on purinergic signaling are of great importance for the identification of new therapeutic targets in PAH. Interestingly, the role of P2Y2 receptors has not yet been sufficiently studied in PAH, whereas the relevance of other P2Ys as drug targets for PAH was shown using specific agonists or antagonists. In this review, we will shed light on P2Y receptors and focus more on the P2Y2 receptor as a potential novel player in PAH and as a new therapeutic target for disease management.
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14
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Saraji A, Sydykov A, Schäfer K, Garcia-Castro CF, Henneke I, Alebrahimdehkordi N, Kosanovic D, Hadzic S, Guenther A, Hecker M, Ghofrani HA, Seeger W, Schermuly RT, Weissmann N, Sommer N, Pak O. PINK1-mediated Mitophagy Contributes to Pulmonary Vascular Remodeling in Pulmonary Hypertension. Am J Respir Cell Mol Biol 2021; 65:226-228. [PMID: 34328407 DOI: 10.1165/rcmb.2021-0082le] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
| | | | | | | | - Ingrid Henneke
- Justus-Liebig University Giessen, Germany.,Institute for Lung Health Giessen, Germany
| | | | - Djuro Kosanovic
- Justus-Liebig University Giessen, Germany.,Sechenov First Moscow State Medical University Moscow, Russia
| | | | | | | | - Hossein A Ghofrani
- Justus-Liebig University Giessen, Germany.,Imperial College London London, United Kingdom
| | - Werner Seeger
- Justus-Liebig University Giessen, Germany.,Institute for Lung Health Giessen, Germany.,Max Planck Institute for Heart and Lung Research Bad Nauheim, Germany
| | | | | | | | - Oleg Pak
- Justus-Liebig University Giessen, Germany
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15
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Sydykov A, Maripov A, Kushubakova N, Muratali Uulu K, Satybaldyev S, Kulchoroeva C, Kosanovic D, Sarybaev A. An Exaggerated Rise in Pulmonary Artery Pressure in a High-Altitude Dweller during the Cold Season. Int J Environ Res Public Health 2021; 18:ijerph18083984. [PMID: 33920082 PMCID: PMC8069572 DOI: 10.3390/ijerph18083984] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/12/2021] [Accepted: 04/09/2021] [Indexed: 12/13/2022]
Abstract
Chronic hypoxia-induced sustained pulmonary vasoconstriction and vascular remodeling lead to mild-to-moderate elevation of pulmonary artery pressure in high-altitude residents. However, in some of them, severe pulmonary hypertension may develop. Besides hypoxia, high-altitude residents also face other environmental challenges such as low ambient temperatures. We describe a case of a 49-year-old woman of Kyrgyz ethnicity with abnormally increased pulmonary artery pressure, revealed by Doppler echocardiography. Significantly elevated pulmonary artery pressure was detected in late winter and this was not associated with right ventricular hypertrophy or right ventricular dysfunction. Repeat echocardiography performed in late summer disclosed a significant attenuation of pulmonary artery pressure elevation, with no changes in right ventricular performance parameters. This case illustrates that, in susceptible individuals, long-term cold exposure could induce an abnormal pulmonary artery pressure rise, which can be reversed during warm seasons as in our patient. In certain circumstances, however, additional factors could contribute to a sustained pulmonary artery pressure increase and the development of persistent pulmonary hypertension, which often leads to right heart failure and premature death.
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Affiliation(s)
- Akylbek Sydykov
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary Institute (CPI), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, 35392 Giessen, Germany;
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan; (A.M.); (N.K.); (K.M.U.); (S.S.); (C.K.)
| | - Abdirashit Maripov
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan; (A.M.); (N.K.); (K.M.U.); (S.S.); (C.K.)
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek 720040, Kyrgyzstan
| | - Nadira Kushubakova
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan; (A.M.); (N.K.); (K.M.U.); (S.S.); (C.K.)
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek 720040, Kyrgyzstan
| | - Kubatbek Muratali Uulu
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan; (A.M.); (N.K.); (K.M.U.); (S.S.); (C.K.)
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek 720040, Kyrgyzstan
| | - Samatbek Satybaldyev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan; (A.M.); (N.K.); (K.M.U.); (S.S.); (C.K.)
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek 720040, Kyrgyzstan
| | - Cholpon Kulchoroeva
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan; (A.M.); (N.K.); (K.M.U.); (S.S.); (C.K.)
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek 720040, Kyrgyzstan
| | - Djuro Kosanovic
- Department of Pulmonology, Sechenov First Moscow State Medical University (Sechenov University), 119992 Moscow, Russia;
| | - Akpay Sarybaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek 720040, Kyrgyzstan; (A.M.); (N.K.); (K.M.U.); (S.S.); (C.K.)
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek 720040, Kyrgyzstan
- Correspondence:
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16
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Heger J, Hirschhäuser C, Bornbaum J, Sydykov A, Dempfle A, Schneider A, Braun T, Schlüter KD, Schulz R. Cardiomyocytes-specific deletion of monoamine oxidase B reduces irreversible myocardial ischemia/reperfusion injury. Free Radic Biol Med 2021; 165:14-23. [PMID: 33476795 DOI: 10.1016/j.freeradbiomed.2021.01.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/08/2021] [Accepted: 01/10/2021] [Indexed: 01/22/2023]
Abstract
Monoamine oxidase B (MAO-B), a protein localized at the outer mitochondrial membrane, catalyzes the oxidative deamination of biogenic amines thereby producing reactive oxygen species (ROS). Increased ROS formation contributes to myocardial ischemia/reperfusion (I/R); however, the importance of different ROS producing enzymes for increased I/R-induced ROS formation and the subsequent I/R injury is still a matter of debate. Here we describe the first cardiomyocytes-specific MAO-B knockout mouse and test the hypothesis that lack of cardiomyocyte MAO-B protects the heart from I/R injury. A cardiac-specific and tamoxifen-inducible MAO-B knockout mouse (MAO-B KO) was generated using the Cre/lox system; Cre-negative MAO-Bfl/fl littermates served as controls (WT). Lack of MAO-B was verified by Western blot and immunohistochemistry. Cardiac function of MAO-B KO and WT was analyzed by echocardiography, quantification of mitochondrial ROS production, and measurement of myocardial infarct size (in % of ventricle) in hearts exposed to global I/R using the Langendorff technique. MAO-B protein expression was significantly down-regulated in MAO-B KO mice after two weeks of tamoxifen feeding followed by ten weeks of feeding with normal chow. ROS formation stimulated by the MAO-B-specific substrate β-phenylethylamin (PEA; 250 μM) was significantly lower in mitochondria isolated from MAO-B KO compared to WT hearts (WT 4.5 ± 0.8 a. u.; MAO-B KO 1.2 ± 0.3 a. u.). Echocardiography revealed no significant differences in LV dimensions as well as ejection fraction (EF) between WT and MAO-B KO mice (EF: WT 67.3 ± 8.8%; MAO-B KO 67.7 ± 6.5%). After I/R, infarct size was significantly lower in MAO-B KO hearts (WT 69.3 ± 15.1%; MAO-B KO 46.8 ± 12.0%). CONCLUSION: Lack of cardiomyocytes-specific MAO-B reduces infarct size suggesting that MAO-B activity contributes to acute reperfusion injury.
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Affiliation(s)
- Jacqueline Heger
- Justus-Liebig-University Giessen, Physiologisches Institut, Giessen, Germany.
| | | | - Julia Bornbaum
- Justus-Liebig-University Giessen, Physiologisches Institut, Giessen, Germany
| | - Akylbek Sydykov
- Justus-Liebig-University Giessen, Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Germany
| | - Astrid Dempfle
- Universitätsklinikum Schleswig-Holstein, Christian-Albrechts-University Kiel, Institute for Medical Informatics and Statistics, Kiel, Germany
| | - André Schneider
- Max-Planck-Institute for Heart and Lung Research (MPI), Bad Nauheim, Germany
| | - Thomas Braun
- Max-Planck-Institute for Heart and Lung Research (MPI), Bad Nauheim, Germany
| | | | - Rainer Schulz
- Justus-Liebig-University Giessen, Physiologisches Institut, Giessen, Germany
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17
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Hirschhäuser C, Sydykov A, Wolf A, Esfandiary A, Bornbaum J, Kutsche HS, Boengler K, Sommer N, Schreckenberg R, Schlüter KD, Weissmann N, Schermuly R, Schulz R. Lack of Contribution of p66shc to Pressure Overload-Induced Right Heart Hypertrophy. Int J Mol Sci 2020; 21:ijms21249339. [PMID: 33302436 PMCID: PMC7762598 DOI: 10.3390/ijms21249339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 11/25/2022] Open
Abstract
The leading cause of death in pulmonary arterial hypertension (PAH) is right ventricular (RV) failure (RVF). Reactive oxygen species (ROS) have been suggested to play a role in the development of RV hypertrophy (RVH) and the transition to RVF. The hydrogen peroxide-generating protein p66shc has been associated with left ventricular (LV) hypertrophy but its role in RVH is unclear. The purpose of this study was to determine whether genetic deletion of p66shc affects the development and/or progression of RVH and RVF in the pulmonary artery banding (PAB) model of RV pressure overload. The impact of p66shc on mitochondrial ROS formation, RV cardiomyocyte function, as well as on RV morphology and function were studied three weeks after PAB or sham operation. PAB in wild type mice did not affect mitochondrial ROS production or RV cardiomyocyte function, but induced RVH and impaired cardiac function. Genetic deletion of p66shc did also not alter basal mitochondrial ROS production or RV cardiomyocyte function, but impaired RV cardiomyocyte shortening was observed following PAB. The development of RVH and RVF following PAB was not affected by p66shc deletion. Thus, our data suggest that p66shc-derived ROS are not involved in the development and progression of RVH or RVF in PAH.
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Affiliation(s)
- Christine Hirschhäuser
- Physiologisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany; (A.W.); (J.B.); (H.S.K.); (K.B.); (R.S.); (K.-D.S.); (R.S.)
- Correspondence: ; Tel.: +49-641-99-47252
| | - Akylbek Sydykov
- Excellence Cluster Cardiopulmonary System (ECCPS), Justus-Liebig-Universität, 35392 Gießen, Germany; (A.S.); (A.E.); (N.S.); (N.W.); (R.S.)
| | - Annemarie Wolf
- Physiologisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany; (A.W.); (J.B.); (H.S.K.); (K.B.); (R.S.); (K.-D.S.); (R.S.)
| | - Azadeh Esfandiary
- Excellence Cluster Cardiopulmonary System (ECCPS), Justus-Liebig-Universität, 35392 Gießen, Germany; (A.S.); (A.E.); (N.S.); (N.W.); (R.S.)
| | - Julia Bornbaum
- Physiologisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany; (A.W.); (J.B.); (H.S.K.); (K.B.); (R.S.); (K.-D.S.); (R.S.)
| | - Hanna Sarah Kutsche
- Physiologisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany; (A.W.); (J.B.); (H.S.K.); (K.B.); (R.S.); (K.-D.S.); (R.S.)
| | - Kerstin Boengler
- Physiologisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany; (A.W.); (J.B.); (H.S.K.); (K.B.); (R.S.); (K.-D.S.); (R.S.)
| | - Natascha Sommer
- Excellence Cluster Cardiopulmonary System (ECCPS), Justus-Liebig-Universität, 35392 Gießen, Germany; (A.S.); (A.E.); (N.S.); (N.W.); (R.S.)
| | - Rolf Schreckenberg
- Physiologisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany; (A.W.); (J.B.); (H.S.K.); (K.B.); (R.S.); (K.-D.S.); (R.S.)
| | - Klaus-Dieter Schlüter
- Physiologisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany; (A.W.); (J.B.); (H.S.K.); (K.B.); (R.S.); (K.-D.S.); (R.S.)
| | - Norbert Weissmann
- Excellence Cluster Cardiopulmonary System (ECCPS), Justus-Liebig-Universität, 35392 Gießen, Germany; (A.S.); (A.E.); (N.S.); (N.W.); (R.S.)
| | - Ralph Schermuly
- Excellence Cluster Cardiopulmonary System (ECCPS), Justus-Liebig-Universität, 35392 Gießen, Germany; (A.S.); (A.E.); (N.S.); (N.W.); (R.S.)
| | - Rainer Schulz
- Physiologisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany; (A.W.); (J.B.); (H.S.K.); (K.B.); (R.S.); (K.-D.S.); (R.S.)
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18
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Mamazhakypov A, Weiß A, Zukunft S, Sydykov A, Kojonazarov B, Wilhelm J, Vroom C, Petrovic A, Kosanovic D, Weissmann N, Seeger W, Fleming I, Iglarz M, Grimminger F, Ghofrani HA, Pullamsetti SS, Schermuly RT. Effects of macitentan and tadalafil monotherapy or their combination on the right ventricle and plasma metabolites in pulmonary hypertensive rats. Pulm Circ 2020; 10:2045894020947283. [PMID: 33240483 PMCID: PMC7672745 DOI: 10.1177/2045894020947283] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 07/10/2020] [Indexed: 12/19/2022] Open
Abstract
Pulmonary arterial hypertension is a severe respiratory disease characterized by pulmonary artery remodeling. RV dysfunction and dysregulated circulating metabolomics are associated with adverse outcomes in pulmonary arterial hypertension. We investigated effects of tadalafil and macitentan alone or in combination on the RV and plasma metabolomics in SuHx and PAB models. For SuHx model, rats were injected with SU5416 and exposed to hypoxia for three weeks and then were returned to normoxia and treated with either tadalafil (10 mg/kg in chow) or macitentan (10 mg/kg in chow) or their combination (both 10 mg/kg in chow) for two weeks. For PAB model, rats were subjected to either sham or PAB surgery for three weeks and treated with above-mentioned drugs from week 1 to week 3. Following terminal echocardiographic and hemodynamic measurements, tissue samples were collected for metabolomic, histological and gene expression analysis. Both SuHx and PAB rats developed RV remodeling/dysfunction with severe and mild plasma metabolomic alterations, respectively. In SuHx rats, tadalafil and macitentan alone or in combination improved RV remodeling/function with the effects of macitentan and combination therapy being superior to tadalafil. All therapies similarly attenuated SuHx-induced changes in plasma metabolomics. In PAB rats, only macitentan improved RV remodeling/function, while only tadalafil attenuated PAB-induced changes in plasma metabolomics.
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Affiliation(s)
- Argen Mamazhakypov
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Astrid Weiß
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Sven Zukunft
- Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University, Frankfurt am Main, Germany & German Center of Cardiovascular Research (DZHK), Partner site RheinMain, Frankfurt am Main, Germany
| | - Akylbek Sydykov
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Baktybek Kojonazarov
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Jochen Wilhelm
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Christina Vroom
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Aleksandar Petrovic
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Djuro Kosanovic
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany.,Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Norbert Weissmann
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Werner Seeger
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany.,Department of Lung Development and Remodelling, Max-Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Ingrid Fleming
- Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University, Frankfurt am Main, Germany & German Center of Cardiovascular Research (DZHK), Partner site RheinMain, Frankfurt am Main, Germany
| | - Marc Iglarz
- Actelion Pharmaceuticals Ltd, Allschwil, Switzerland
| | - Friedrich Grimminger
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Hossein A Ghofrani
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
| | - Soni S Pullamsetti
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany.,Department of Lung Development and Remodelling, Max-Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Ralph T Schermuly
- Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center, Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, Germany
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19
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Heitmeier T, Sydykov A, Lukas C, Vroom C, Korfei M, Petrovic A, Klingel K, Günther A, Eickelberg O, Weissmann N, Ghofrani HA, Seeger W, Grimminger F, Schermuly RT, Meiners S, Kosanovic D. Altered proteasome function in right ventricular hypertrophy. Cardiovasc Res 2020; 116:406-415. [PMID: 31020333 DOI: 10.1093/cvr/cvz103] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/01/2019] [Accepted: 04/16/2019] [Indexed: 01/29/2023] Open
Abstract
AIMS In patients with pulmonary hypertension, right ventricular hypertrophy (RVH) is a detrimental condition that ultimately results in right heart failure and death. The ubiquitin proteasome system has been identified as a major protein degradation system to regulate cardiac remodelling in the left heart. Its role in right heart hypertrophy, however, is still ambiguous. METHODS AND RESULTS RVH was induced in mice by pulmonary artery banding (PAB). Both, expression and activity of the proteasome was found to be up-regulated in the hypertrophied right ventricle (RV) compared to healthy controls. Catalytic inhibition of the proteasome by the two proteasome inhibitors Bortezomib (BTZ) and ONX-0912 partially improved RVH both in preventive and therapeutic applications. Native gel analysis revealed that specifically the 26S proteasome complexes were activated in experimental RVH. Increased assembly of 26S proteasomes was accompanied by elevated expression of Rpn6, a rate-limiting subunit of 26S proteasome assembly, in hypertrophied cardiomyocytes of the right heart. Intriguingly, patients with RVH also showed increased expression of Rpn6 in hypertrophied cardiomyocytes of the RV as identified by immunohistochemical staining. CONCLUSION Our data demonstrate that alterations in expression and activity of proteasomal subunits play a critical role in the development of RVH. Moreover, this study provides an improved understanding on the selective activation of the 26S proteasome in RVH that might be driven by the rate-limiting subunit Rpn6. In RVH, Rpn6 therefore represents a more specific target to interfere with proteasome function than the commonly used catalytic proteasome inhibitors.
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Affiliation(s)
- Tanja Heitmeier
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany
| | - Akylbek Sydykov
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany
| | - Christina Lukas
- Comprehensive Pneumology Center (CPC), University Hospital, Ludwig-Maximilians-University and Helmholtz Zentrum München, Max-Lebsche-Platz 31, 81377 Munich, Germany
| | - Christina Vroom
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany
| | - Martina Korfei
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany
| | - Aleksandar Petrovic
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany
| | - Karin Klingel
- Institute for Pathology and Neuropathology, University of Tübingen, Germany
| | - Andreas Günther
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany.,Agaplesion Lung Clinic Waldhof Elgershausen, Greifenstein, Germany
| | - Oliver Eickelberg
- Comprehensive Pneumology Center (CPC), University Hospital, Ludwig-Maximilians-University and Helmholtz Zentrum München, Max-Lebsche-Platz 31, 81377 Munich, Germany.,University of Colorado at Denver - Anschutz Medical Campus, 129263, Pulmonary and Critical Care Medicine University, Denver, CO, USA
| | - Norbert Weissmann
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany
| | | | - Werner Seeger
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany.,Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Friedrich Grimminger
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany
| | - Ralph Theo Schermuly
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany
| | - Silke Meiners
- Comprehensive Pneumology Center (CPC), University Hospital, Ludwig-Maximilians-University and Helmholtz Zentrum München, Max-Lebsche-Platz 31, 81377 Munich, Germany
| | - Djuro Kosanovic
- Universities of Giessen and Marburg Lung Center (UGMLC), Aulweg 130, 35392 Giessen, Germany.,Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
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20
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Neupane B, Sydykov A, Pradhan K, Vroom C, Herden C, Karnati S, Ghofrani HA, Avdeev S, Ergün S, Schermuly RT, Kosanovic D. Influence of gender in monocrotaline and chronic hypoxia induced pulmonary hypertension in obese rats and mice. Respir Res 2020; 21:136. [PMID: 32493503 PMCID: PMC7268383 DOI: 10.1186/s12931-020-01394-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 05/13/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Obesity and pulmonary hypertension (PH) share common characteristics, such as augmented inflammation and oxidative stress. However, the exact role of obesity in the pathology of PH is largely uninvestigated. Therefore, we have hypothesized that in the context of obesity the gender difference may have influence on development of PH in animal models of this disease. METHODS Animal experiments were conducted in monocrotaline (MCT) and chronic hypoxia (HOX) models of PH. Lean and obese Zucker rats or B6 mice of both genders were used for MCT or HOX models, respectively. Echocardiography, hemodynamic measurements, histology and immuno-histochemistry were performed to analyze various parameters, such as right ventricular function and hypertrophy, hemodynamics, pulmonary vascular remodeling and lung inflammation. RESULTS Both lean and obese male and female Zucker rats developed PH after a single MCT injection. However, negligible differences were seen between lean and obese male rats in terms of PH severity at the end stage of disease. Conversely, a more prominent and severe PH was observed in obese female rats compared to their lean counterparts. In contrast, HOX induced PH in lean and obese, male and female mice did not show any apparent differences. CONCLUSION Gender influences PH severity in obese MCT-injected rats. It is also an important factor associated with altered inflammation. However, further research is necessary to investigate and reveal the underlying mechanisms.
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Affiliation(s)
- Balram Neupane
- Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Aulweg 130, 35392, Giessen, Germany
- Medizinischen Klinik I, Universitätsklinikum RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Akylbek Sydykov
- Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Aulweg 130, 35392, Giessen, Germany
| | - Kabita Pradhan
- Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Aulweg 130, 35392, Giessen, Germany
- Medizinischen Klinik I, Universitätsklinikum RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Christina Vroom
- Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Aulweg 130, 35392, Giessen, Germany
| | - Christiane Herden
- Institute of Veterinary Pathology, Justus-Liebig University, Giessen, Germany
| | - Srikanth Karnati
- Institute of Anatomy and Cell Biology, Julius-Maximilians-University Würzburg, Würzburg, Germany
| | - Hossein Ardeschir Ghofrani
- Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Aulweg 130, 35392, Giessen, Germany
| | - Sergey Avdeev
- Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Süleyman Ergün
- Institute of Anatomy and Cell Biology, Julius-Maximilians-University Würzburg, Würzburg, Germany
| | - Ralph Theo Schermuly
- Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Aulweg 130, 35392, Giessen, Germany.
| | - Djuro Kosanovic
- Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Aulweg 130, 35392, Giessen, Germany.
- Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.
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21
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Esfandiary A, Kutsche HS, Schreckenberg R, Weber M, Pak O, Kojonazarov B, Sydykov A, Hirschhäuser C, Wolf A, Haag D, Hecker M, Fink L, Seeger W, Ghofrani HA, Schermuly RT, Weißmann N, Schulz R, Rohrbach S, Li L, Sommer N, Schlüter KD. Protection against pressure overload-induced right heart failure by uncoupling protein 2 silencing. Cardiovasc Res 2020; 115:1217-1227. [PMID: 30850841 PMCID: PMC6529920 DOI: 10.1093/cvr/cvz049] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 01/31/2019] [Accepted: 03/06/2019] [Indexed: 12/14/2022] Open
Abstract
Aims The role of uncoupling protein 2 (UCP2) in cardiac adaptation to pressure overload remains unclear. In a classical model of left ventricular pressure overload genetic deletion of UCP2 (UCP2−/−) protected against cardiac hypertrophy and failure. However, in UCP2−/− mice increased proliferation of pulmonary arterial smooth muscle cells induces mild pulmonary hypertension, right ventricular (RV) hypertrophy, and reduced cardiac output. This suggests a different role for UCP2 in RV and left ventricular adaptation to pressure overload. To clarify this situation in more detail UCP2−/− and wild-type mice were exposed to pulmonary arterial banding (PAB). Methods and results Mice were analysed (haemodynamics, morphometry, and echocardiography) 3 weeks after PAB or sham surgery. Myocytes and non-myocytes were isolated and analysed separately. Cell shortening of myocytes and fura-2 loading of cardiomyocytes were used to characterize their function. Brd assay was performed to study fibroblast proliferation. Isolated mitochondria were analysed to investigate the role of UCP2 for reactive oxygen species (ROS) production. UCP2 mRNA was 2.7-fold stronger expressed in RV myocytes than in left ventricular myocytes and stronger expressed in non-myocytes compared with myocytes. Three weeks after PAB, cardiac output was reduced in wild type but preserved in UCP2−/− mice. UCP2−/− had increased RV wall thickness, but lower RV internal diameters and displayed a significant stronger fibrosis. Cardiac fibroblasts from UCP2−/− had reduced proliferation rates but higher collagen-1 expression. Myocytes isolated from mice after PAB banding showed preserved function that was further improved by UCP2−/−. Mitochondrial ROS production and respiration was similar between UCP2−/− or wild-type hearts. Conclusion Despite a mild pulmonary hypertension in UCP2−/− mice, hearts from these mice are well preserved against additional pressure overload (severe pulmonary hypertension). This—at least in part—depends on different behaviour of non-myocytes (fibroblasts).
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Affiliation(s)
| | - Hanna S Kutsche
- Department of Physiology, Justus-Liebig University Gießen, Aulweg 129, Gießen, Germany
| | - Rolf Schreckenberg
- Department of Physiology, Justus-Liebig University Gießen, Aulweg 129, Gießen, Germany
| | - Martin Weber
- Department of Physiology, Justus-Liebig University Gießen, Aulweg 129, Gießen, Germany
| | - Oleg Pak
- Justus-Liebig-University Gießen, ECCPS, Aulweg 130, Gießen, Germany
| | | | - Akylbek Sydykov
- Justus-Liebig-University Gießen, ECCPS, Aulweg 130, Gießen, Germany
| | | | - Annemarie Wolf
- Department of Physiology, Justus-Liebig University Gießen, Aulweg 129, Gießen, Germany
| | - Daniela Haag
- Justus-Liebig-University Gießen, ECCPS, Aulweg 130, Gießen, Germany
| | - Matthias Hecker
- Justus-Liebig-University Gießen, ECCPS, Aulweg 130, Gießen, Germany
| | - Ludger Fink
- Justus-Liebig-University Gießen, ECCPS, Aulweg 130, Gießen, Germany
| | - Werner Seeger
- Justus-Liebig-University Gießen, ECCPS, Aulweg 130, Gießen, Germany
| | | | | | - Norbert Weißmann
- Justus-Liebig-University Gießen, ECCPS, Aulweg 130, Gießen, Germany
| | - Rainer Schulz
- Department of Physiology, Justus-Liebig University Gießen, Aulweg 129, Gießen, Germany
| | - Susanne Rohrbach
- Department of Physiology, Justus-Liebig University Gießen, Aulweg 129, Gießen, Germany
| | - Ling Li
- Department of Physiology, Justus-Liebig University Gießen, Aulweg 129, Gießen, Germany
| | - Natascha Sommer
- Justus-Liebig-University Gießen, ECCPS, Aulweg 130, Gießen, Germany
| | - Klaus-Dieter Schlüter
- Department of Physiology, Justus-Liebig University Gießen, Aulweg 129, Gießen, Germany
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22
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Sommer N, Alebrahimdehkordi N, Pak O, Knoepp F, Strielkov I, Scheibe S, Dufour E, Andjelković A, Sydykov A, Saraji A, Petrovic A, Quanz K, Hecker M, Kumar M, Wahl J, Kraut S, Seeger W, Schermuly RT, Ghofrani HA, Ramser K, Braun T, Jacobs HT, Weissmann N, Szibor M. Bypassing mitochondrial complex III using alternative oxidase inhibits acute pulmonary oxygen sensing. Sci Adv 2020; 6:eaba0694. [PMID: 32426457 PMCID: PMC7159913 DOI: 10.1126/sciadv.aba0694] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 01/22/2020] [Indexed: 05/02/2023]
Abstract
Mitochondria play an important role in sensing both acute and chronic hypoxia in the pulmonary vasculature, but their primary oxygen-sensing mechanism and contribution to stabilization of the hypoxia-inducible factor (HIF) remains elusive. Alteration of the mitochondrial electron flux and increased superoxide release from complex III has been proposed as an essential trigger for hypoxic pulmonary vasoconstriction (HPV). We used mice expressing a tunicate alternative oxidase, AOX, which maintains electron flux when respiratory complexes III and/or IV are inhibited. Respiratory restoration by AOX prevented acute HPV and hypoxic responses of pulmonary arterial smooth muscle cells (PASMC), acute hypoxia-induced redox changes of NADH and cytochrome c, and superoxide production. In contrast, AOX did not affect the development of chronic hypoxia-induced pulmonary hypertension and HIF-1α stabilization. These results indicate that distal inhibition of the mitochondrial electron transport chain in PASMC is an essential initial step for acute but not chronic oxygen sensing.
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Affiliation(s)
- Natascha Sommer
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Nasim Alebrahimdehkordi
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Oleg Pak
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Fenja Knoepp
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Ievgen Strielkov
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Susan Scheibe
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Eric Dufour
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland
| | - Ana Andjelković
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland
| | - Akylbek Sydykov
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Alireza Saraji
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Aleksandar Petrovic
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Karin Quanz
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Matthias Hecker
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Manish Kumar
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Joel Wahl
- Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE-97187 Luleå, Sweden
| | - Simone Kraut
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Werner Seeger
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Ralph T. Schermuly
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
| | - Hossein A. Ghofrani
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
- Department of Medicine, Imperial College London, Du Cane Road, Hammersmith Campus, London W12 0NN, UK
| | - Kerstin Ramser
- Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE-97187 Luleå, Sweden
| | - Thomas Braun
- Department I, Cardiac Development and Remodelling, Max Planck Institute for Heart and Lung Research, D-61231 Bad Nauheim, Germany
| | - Howard T. Jacobs
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland
| | - Norbert Weissmann
- Excellence Cluster Cardio-Pulmonary Institute (CPI), University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, D-35392 Giessen, Germany
- Corresponding author. (M.S.); (N.W.)
| | - Marten Szibor
- Faculty of Medicine and Health Technology, Tampere University, FI-33014 Tampere, Finland
- Corresponding author. (M.S.); (N.W.)
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23
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Hempel F, Roderfeld M, Savai R, Sydykov A, Irungbam K, Schermuly R, Voswinckel R, Köhler K, Churin Y, Kiss L, Bier J, Pons-Kühnemann J, Roeb E. Depletion of Bone Marrow-Derived Fibrocytes Attenuates TAA-Induced Liver Fibrosis in Mice. Cells 2019; 8:cells8101210. [PMID: 31591328 PMCID: PMC6829877 DOI: 10.3390/cells8101210] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 10/05/2019] [Indexed: 12/12/2022] Open
Abstract
Bone marrow-derived fibrocytes (FC) represent a unique cell type, sharing features of both mesenchymal and hematopoietic cells. FC were shown to specifically infiltrate the injured liver and participate in fibrogenesis. Moreover, FC exert a variety of paracrine functions, thus possibly influencing the disease progression. However, the overall contribution of FC to liver fibrosis remains unclear. We aimed to study the effect of a specific FC depletion, utilizing a herpes simplex virus thymidine kinase (HSV-TK)/Valganciclovir suicide gene strategy. Fibrosis was induced by oral thioacetamide (TAA) administration in C57BL/6J mice. Hepatic hydroxyproline content was assessed for the primary readout. The HSV-TK model enabled the specific depletion of fibrocytes. Hepatic hydroxyproline content was significantly reduced as a result of the fibrocyte ablation (−7.8%; 95% CI: 0.7–14.8%; p = 0.033), denoting a reduced deposition of fibrillar collagens. Lower serum alanine transaminase levels (−20.9%; 95% CI: 0.4–36.9%; p = 0.049) indicate a mitigation of liver-specific cellular damage. A detailed mode of action, however, remains yet to be identified. The present study demonstrates a relevant functional contribution of fibrocytes to chronic toxic liver fibrosis, contradicting recent reports. Our results emphasize the need to thoroughly study the biology of fibrocytes in order to understand their importance for hepatic fibrogenesis.
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Affiliation(s)
- Felix Hempel
- Department of Gastroenterology, Justus Liebig University, D-35392 Giessen, Germany.
| | - Martin Roderfeld
- Department of Gastroenterology, Justus Liebig University, D-35392 Giessen, Germany.
| | - Rajkumar Savai
- Max Planck Institute for Heart and Lung Research, Member of the German Center for Lung Research (DZL), Member of the Cardio-Pulmonary Institute (CPI), D-61231 Bad Nauheim, Germany.
- Department of Internal Medicine, Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus Liebig University, D-35392 Giessen, Germany.
| | - Akylbek Sydykov
- Department of Internal Medicine, Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus Liebig University, D-35392 Giessen, Germany.
| | - Karuna Irungbam
- Department of Gastroenterology, Justus Liebig University, D-35392 Giessen, Germany.
| | - Ralph Schermuly
- Department of Internal Medicine, Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus Liebig University, D-35392 Giessen, Germany.
| | - Robert Voswinckel
- Department of Internal Medicine, Bürgerhospital, D-61169 Friedberg, Germany.
- Department of Internal Medicine, Hochwaldkrankenhaus, D-61231 Bad Nauheim, Germany.
| | - Kernt Köhler
- Institute of Veterinary Pathology, Justus Liebig University, D-35392 Giessen, Germany.
| | - Yury Churin
- Department of Gastroenterology, Justus Liebig University, D-35392 Giessen, Germany.
| | - Ladislau Kiss
- Department of Internal Medicine, Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus Liebig University, D-35392 Giessen, Germany.
| | - Jens Bier
- Department of Internal Medicine, Cardio-Pulmonary Institute (CPI), Universities of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus Liebig University, D-35392 Giessen, Germany.
| | - Jörn Pons-Kühnemann
- Institute of Medical Informatics, Justus Liebig University, D-35392 Giessen, Germany.
| | - Elke Roeb
- Department of Gastroenterology, Justus Liebig University, D-35392 Giessen, Germany.
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24
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Muratali uulu K, Cholponbaeva M, Duishobaev M, Satybaldiev S, Kerimbekova J, Kushubakova N, Baktybek N, Akunov A, Mamajakypov A, Sydykov A, Maripov A, Sarybaev A. The relationship of systolic pulmonary arterial pressure with pulmonary function test and the fractional exhaled nitric oxide level in Kyrgyz population. Imaging 2019. [DOI: 10.1183/13993003.congress-2019.pa4818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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25
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Sydykov A, Maripov A, Muratali Uulu K, Kushubakova N, Petrovic A, Vroom C, Cholponbaeva M, Duishobaev M, Satybaldyev S, Satieva N, Mamazhakypov A, Sartmyrzaeva M, Omurzakova N, Kerimbekova Z, Baktybek N, Pak O, Zhao L, Weissmann N, Sarybaev A, Avdeev S, Ghofrani HA, Schermuly RT, Kosanovic D. Pulmonary Vascular Pressure Response to Acute Cold Exposure in Kyrgyz Highlanders. High Alt Med Biol 2019; 20:375-382. [PMID: 31464532 DOI: 10.1089/ham.2019.0046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Background/Aims: Long-term high altitude residence leads to a sustained increase in pulmonary vascular resistance and elevation of pulmonary artery pressure due to chronic alveolar hypoxia. However, living at high altitude is also associated with other environmental factors such as cold. There is still little experimental evidence suggesting detrimental effects of low temperatures on the pulmonary vasculature. Therefore, our objective was to investigate acute effects of cold exposure on the pulmonary circulation in Kyrgyz high altitude natives. Methods: Responses of the pulmonary circulation during acute exposure to controlled cold conditions (4°C-6°C) for 60 minutes were measured in highlanders using Doppler echocardiography. Based on the Doppler echocardiography-derived tricuspid regurgitant systolic pressure gradient (TRG), subjects with TRG ≥40 mmHg were allocated into the pulmonary hypertension (PH) group. Participants from the PH group were compared with volunteer control subjects with TRG <40 mmHg. All baseline measurements were evaluated in a warm room during 60 minutes (22°C-28°C). Following baseline echocardiography, the subjects were assigned to either warm or cold exposure for an additional 60 minutes. Results: Acute cold exposure significantly increased TRG both in the control (ΔTRG, 4.93 mmHg) and in the PH (ΔTRG, 8.15 mmHg) group, compared to the respective warm exposure conditions (ΔTRG, -0.14 and -0.05 mmHg). No changes in cardiac output were observed upon cold exposure. Conclusion: Thus, acute exposure to cold leads to elevation of pulmonary artery pressure in high altitude residents.
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Affiliation(s)
- Akylbek Sydykov
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany.,Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
| | - Abdirashit Maripov
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Kubatbek Muratali Uulu
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Nadira Kushubakova
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Aleksandar Petrovic
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Christina Vroom
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Meerim Cholponbaeva
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Melis Duishobaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Samatbek Satybaldyev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Nurgul Satieva
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
| | - Argen Mamazhakypov
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Meerim Sartmyrzaeva
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Nazgul Omurzakova
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
| | - Zhainagul Kerimbekova
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Nursultan Baktybek
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Oleg Pak
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Lan Zhao
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany.,Department of Medicine, Imperial College London, London, United Kingdom
| | - Norbert Weissmann
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Akpay Sarybaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Sergey Avdeev
- Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Hossein Ardeschir Ghofrani
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Ralph Theo Schermuly
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Djuro Kosanovic
- Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Member of the German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany.,Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
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Kosanovic D, Deo U, Gall H, Selvakumar B, Herold S, Weiss A, Petrovic A, Sydykov A, Ghofrani HA, Schermuly RT. Enhanced circulating levels of CD3 cells-derived extracellular vesicles in different forms of pulmonary hypertension. Pulm Circ 2019; 9:2045894019864357. [PMID: 31250703 PMCID: PMC6647209 DOI: 10.1177/2045894019864357] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
It has been shown previously that increased circulating endothelial cells-derived extracellular vesicles represent an important pathological attribute of pulmonary hypertension. Although it is a well-known fact that inflammatory cells may also release extracellular vesicles, and pulmonary hypertension is a disease associated with abnormal inflammation, there is no profound knowledge with regard to the role of inflammatory cells-derived extracellular vesicles. Therefore, our study demonstrated that circulating levels of extracellular vesicles derived from T-cells are enhanced in various pulmonary hypertension forms and that endothelial cells-derived extracellular vesicles may have distinctive profiles in different clinical subgroups of pulmonary hypertension, which still remains as a poorly treatable and life-threatening disorder.
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Affiliation(s)
- Djuro Kosanovic
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany.,2 Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Ujjwal Deo
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Henning Gall
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Balachandar Selvakumar
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Susanne Herold
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Astrid Weiss
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Aleksandar Petrovic
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Akylbek Sydykov
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Hossein Ardeschir Ghofrani
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Ralph Theo Schermuly
- 1 Universities of Giessen and Marburg Lung Center (UGMLC); Member of the German Center for Lung Research (DZL), Giessen, Germany
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27
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Sydykov A, Muratali Uulu K, Maripov A, Cholponbaeva M, Khan T, Sarybaev A. A Case of Chronic Thromboembolic Pulmonary Hypertension in a High-Altitude Dweller. High Alt Med Biol 2019; 20:303-306. [PMID: 31264887 DOI: 10.1089/ham.2018.0132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Chronic hypoxia causes sustained pulmonary vasoconstriction and vascular remodeling leading to development of pulmonary hypertension in high-altitude residents. Although pulmonary hypertension is of mild to moderate degrees in most cases, some high-altitude residents may develop severe pulmonary hypertension. We report a case of a 47-year-old female highlander of Kyrgyz ethnicity who presented with exertional breathlessness and echocardiographic signs of severe pulmonary hypertension, who was diagnosed as having chronic thromboembolic pulmonary hypertension (CTEPH). To the best of our knowledge, this is the first documented case of severe CTEPH in a high-altitude dweller. This case illustrates that causes other than hypoxia may underlie and/or contribute to severe pulmonary hypertension in residents of high altitude.
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Affiliation(s)
- Akylbek Sydykov
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Department of Internal Medicine, University of Giessen and Marburg Lung Center (UGMLC), Justus Liebig University of Giessen, Giessen, Germany
| | - Kubatbek Muratali Uulu
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Abdirashit Maripov
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Meerim Cholponbaeva
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Tatyana Khan
- Department of Radiology, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
| | - Akpay Sarybaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
- Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
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28
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Kosanovic D, Platzek SM, Petrovic A, Sydykov A, Maripov A, Mamazhakypov A, Sartmyrzaeva M, Muratali Uulu K, Cholponbaeva M, Toktosunova A, Omurzakova N, Duishobaev M, Vroom C, Pak O, Weissmann N, Ghofrani HA, Sarybaev A, Schermuly RT. Circulating Apoptotic Signals During Acute and Chronic Exposure to High Altitude in Kyrgyz Population. Front Physiol 2019; 10:54. [PMID: 30804801 PMCID: PMC6370645 DOI: 10.3389/fphys.2019.00054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 01/17/2019] [Indexed: 12/21/2022] Open
Abstract
Background: Circulating apoptotic signals (CASs) have been described in the pathologies associated with dysregulated apoptosis, such as cancer, heart diseases, and pulmonary hypertension (PH). However, nothing is known about the expression profiles of these markers in the circulation of humans exposed to acute and chronic effects of high altitude (HA). Methods: Gene expression levels of different apoptotic signals (ASs) were analyzed in human pulmonary artery smooth muscle cells (PASMCs) upon hypoxia incubation. In addition, we measured the plasma values of relevant CAS in Kyrgyz volunteers during acute and chronic exposure to HA. Finally, we analyzed the effects of pro-apoptotic mediator Fas ligand (FasL) on apoptosis and proliferation of human PASMCs. Results: Several cellular AS were increased in PASMCs exposed to hypoxia, in comparison to normoxia condition. Among analyzed CAS, there was a prominent reduction of FasL in lowlanders exposed to HA environment. Furthermore, decreased circulatory levels of FasL were found in highlanders with HA-induced PH (HAPH), as compared to the lowland controls. Furthermore, FasL concentration in plasma negatively correlated with tricuspid regurgitant gradient values. Finally, FasL exerted pro-apoptotic and anti-proliferative effects on PASMCs. Conclusion: Our data demonstrated that circulating levels of FasL are reduced during acute and chronic exposure to HA environment. In addition, dysregulated FasL may play a role in the context of HAPH due to its relevant functions on apoptosis and proliferation of PASMCs.
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Affiliation(s)
- Djuro Kosanovic
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany.,Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Simon Maximilian Platzek
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Aleksandar Petrovic
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Akylbek Sydykov
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Abdirashit Maripov
- Kyrgyz National Centre for Cardiology and Internal Medicine, named after Academician Mirsaid Mirrakhimov, Bishkek, Kyrgyzstan
| | - Argen Mamazhakypov
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Meerim Sartmyrzaeva
- Kyrgyz National Centre for Cardiology and Internal Medicine, named after Academician Mirsaid Mirrakhimov, Bishkek, Kyrgyzstan
| | - Kubatbek Muratali Uulu
- Kyrgyz National Centre for Cardiology and Internal Medicine, named after Academician Mirsaid Mirrakhimov, Bishkek, Kyrgyzstan
| | - Meerim Cholponbaeva
- Kyrgyz National Centre for Cardiology and Internal Medicine, named after Academician Mirsaid Mirrakhimov, Bishkek, Kyrgyzstan
| | - Aidana Toktosunova
- Kyrgyz National Centre for Cardiology and Internal Medicine, named after Academician Mirsaid Mirrakhimov, Bishkek, Kyrgyzstan
| | - Nazgul Omurzakova
- Kyrgyz National Centre for Cardiology and Internal Medicine, named after Academician Mirsaid Mirrakhimov, Bishkek, Kyrgyzstan
| | - Melis Duishobaev
- Kyrgyz National Centre for Cardiology and Internal Medicine, named after Academician Mirsaid Mirrakhimov, Bishkek, Kyrgyzstan
| | - Christina Vroom
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Oleg Pak
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Norbert Weissmann
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Hossein Ardeschir Ghofrani
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Akpay Sarybaev
- Kyrgyz National Centre for Cardiology and Internal Medicine, named after Academician Mirsaid Mirrakhimov, Bishkek, Kyrgyzstan
| | - Ralph Theo Schermuly
- Chair for Pulmonary Pharmacotherapy, Member of the German Center for Lung Research, Universities of Giessen and Marburg Lung Center, Giessen, Germany
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29
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Akunov A, Sydykov A, Toktash T, Doolotova A, Sarybaev A. Hemoglobin Changes After Long-Term Intermittent Work at High Altitude. Front Physiol 2018; 9:1552. [PMID: 30443224 PMCID: PMC6221958 DOI: 10.3389/fphys.2018.01552] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 10/16/2018] [Indexed: 12/11/2022] Open
Abstract
Chronic high altitude hypoxia leads to an increase in red cell numbers and hemoglobin concentration. However, the effects of long-term intermittent hypoxia on hemoglobin concentration have not fully been studied. The aim of this study was to evaluate hemoglobin levels in workers commuting between an elevation of 3,800 m (2-week working shift) and lowland below 1,700 m (2 weeks of holiday). A total of 266 healthy males, aged from 20 to 69 years (mean age 45.9 ± 0.6 years), were included into this study. The duration of intermittent high altitude exposure ranged from 0 to 21 years. Any cardiac or pulmonary disorder was excluded during annual check-ups including clinical examination, clinical lab work (blood cell count, urine analysis, and biochemistry), ECG, echocardiography, and pulmonary function tests. The mean hemoglobin level in workers was 16.2 ± 0.11 g/dL. Univariate linear regression revealed an association of the hemoglobin levels with the years of exposure. Hemoglobin levels increased 0.068 g/dL [95% CI: 0.037 to 0.099, p < 0.001] for every year of intermittent high altitude exposure. Further, after adjusting for other confounding variables (age, living at low or moderate altitude, body mass index, and occupation) using multivariable regression analysis, the magnitude of hemoglobin level changes decreased, but remained statistically significant: 0.046 g/dL [95% CI: 0.005 to 0.086, p < 0.05]. Besides that, a weak linear relationship between hemoglobin levels and body mass index was revealed, which was independent of the years of exposure to high altitude (0.065 g/dL [95% CI: 0.006 to 0.124, p < 0.05]). We concluded that hemoglobin levels have a linear relationship with the exposure years spent in intermittent hypoxia and body mass index.
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Affiliation(s)
- Almaz Akunov
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
| | - Akylbek Sydykov
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL), Justus Liebig University Giessen, Giessen, Germany
| | - Turgun Toktash
- Medical Department, Kumtor Gold Company, Bishkek, Kyrgyzstan
| | - Anara Doolotova
- Medical Department, Kumtor Gold Company, Bishkek, Kyrgyzstan
| | - Akpay Sarybaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan.,Kyrgyz Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan
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30
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Sydykov A, Mamazhakypov A, Petrovic A, Kosanovic D, Sarybaev AS, Weissmann N, Ghofrani HA, Schermuly RT. Inflammatory Mediators Drive Adverse Right Ventricular Remodeling and Dysfunction and Serve as Potential Biomarkers. Front Physiol 2018; 9:609. [PMID: 29875701 PMCID: PMC5974151 DOI: 10.3389/fphys.2018.00609] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Accepted: 05/04/2018] [Indexed: 01/07/2023] Open
Abstract
Adverse right ventricular (RV) remodeling leads to ventricular dysfunction and failure that represents an important determinant of outcome in patients with pulmonary hypertension (PH). Recent evidence indicates that inflammatory activation contributes to the pathogenesis of adverse RV remodeling and dysfunction. It has been shown that accumulation of inflammatory cells such as macrophages and mast cells in the right ventricle is associated with maladaptive RV remodeling. In addition, inhibition of inflammation in animal models of RV failure ameliorated RV structural and functional impairment. Furthermore, a number of circulating inflammatory mediators have been demonstrated to be associated with RV performance. This work reviews the role of inflammation in RV remodeling and dysfunction and discusses anti-inflammatory strategies that may attenuate adverse structural alterations while promoting improvement of RV function.
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Affiliation(s)
- Akylbek Sydykov
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, German Center for Lung Research, Justus Liebig University of Giessen, Giessen, Germany.,Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
| | - Argen Mamazhakypov
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, German Center for Lung Research, Justus Liebig University of Giessen, Giessen, Germany
| | - Aleksandar Petrovic
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, German Center for Lung Research, Justus Liebig University of Giessen, Giessen, Germany
| | - Djuro Kosanovic
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, German Center for Lung Research, Justus Liebig University of Giessen, Giessen, Germany
| | - Akpay S Sarybaev
- Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan
| | - Norbert Weissmann
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, German Center for Lung Research, Justus Liebig University of Giessen, Giessen, Germany
| | - Hossein A Ghofrani
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, German Center for Lung Research, Justus Liebig University of Giessen, Giessen, Germany
| | - Ralph T Schermuly
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, German Center for Lung Research, Justus Liebig University of Giessen, Giessen, Germany
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31
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Pak O, Sydykov A, Kosanovic D, Schermuly RT, Dietrich A, Schröder K, Brandes RP, Gudermann T, Sommer N, Weissmann N. Lung Ischaemia-Reperfusion Injury: The Role of Reactive Oxygen Species. Adv Exp Med Biol 2018; 967:195-225. [PMID: 29047088 DOI: 10.1007/978-3-319-63245-2_12] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Lung ischaemia-reperfusion injury (LIRI) occurs in many lung diseases and during surgical procedures such as lung transplantation. The re-establishment of blood flow and oxygen delivery into the previously ischaemic lung exacerbates the ischaemic injury and leads to increased microvascular permeability and pulmonary vascular resistance as well as to vigorous activation of the immune response. These events initiate the irreversible damage of the lung with subsequent oedema formation that can result in systemic hypoxaemia and multi-organ failure. Alterations in the production of reactive oxygen species (ROS) and reactive nitrogen species (RNS) have been suggested as crucial mediators of such responses during ischaemia-reperfusion in the lung. Among numerous potential sources of ROS/RNS within cells, nicotinamide adenine dinucleotide phosphate (NADPH) oxidases, xanthine oxidases, nitric oxide synthases and mitochondria have been investigated during LIRI. Against this background, we aim to review here the extensive literature about the ROS-mediated cellular signalling during LIRI, as well as the effectiveness of antioxidants as treatment option for LIRI.
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Affiliation(s)
- Oleg Pak
- Excellence Cluster Cardio-pulmonary System, University of Giessen Lung Center, German Center for Lung Research (DZL), Justus-Liebig-University Giessen, Aulweg 130, 35392, Giessen, Germany
| | - Akylbek Sydykov
- Excellence Cluster Cardio-pulmonary System, University of Giessen Lung Center, German Center for Lung Research (DZL), Justus-Liebig-University Giessen, Aulweg 130, 35392, Giessen, Germany
| | - Djuro Kosanovic
- Excellence Cluster Cardio-pulmonary System, University of Giessen Lung Center, German Center for Lung Research (DZL), Justus-Liebig-University Giessen, Aulweg 130, 35392, Giessen, Germany
| | - Ralph T Schermuly
- Excellence Cluster Cardio-pulmonary System, University of Giessen Lung Center, German Center for Lung Research (DZL), Justus-Liebig-University Giessen, Aulweg 130, 35392, Giessen, Germany
| | - Alexander Dietrich
- Walther-Straub-Institut für Pharmakologie und Toxikologie, Ludwig-Maximilians-Universität München, Goethestraße 33, 80336, Munich, Germany
| | - Katrin Schröder
- Institut für Kardiovaskuläre Physiologie, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt, Germany
| | - Ralf P Brandes
- Institut für Kardiovaskuläre Physiologie, Goethe University Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt, Germany
| | - Thomas Gudermann
- Walther-Straub-Institut für Pharmakologie und Toxikologie, Ludwig-Maximilians-Universität München, Goethestraße 33, 80336, Munich, Germany
| | - Natascha Sommer
- Excellence Cluster Cardio-pulmonary System, University of Giessen Lung Center, German Center for Lung Research (DZL), Justus-Liebig-University Giessen, Aulweg 130, 35392, Giessen, Germany
| | - Norbert Weissmann
- Excellence Cluster Cardio-pulmonary System, University of Giessen Lung Center, German Center for Lung Research (DZL), Justus-Liebig-University Giessen, Aulweg 130, 35392, Giessen, Germany.
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32
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Muratali Uulu K, Cholponbaeva M, Duishobaev M, Toktosunova A, Maripov A, Sydykov A, Sarybaev A. A Case of Subacute Infantile Mountain Sickness in a Kyrgyz Child. High Alt Med Biol 2018; 19:208-210. [PMID: 29565692 DOI: 10.1089/ham.2017.0163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
Muratali Uulu, Kubatbek, Meerim Cholponbaeva, Melis Duishobaev, Aidana Toktosunova, Abdirashit Maripov, Akylbek Sydykov, and Akpay Sarybaev. A case of subacute infantile mountain sickness in a Kyrgyz child. High Alt Med Biol. 19:208-210, 2018.-Subacute infantile mountain sickness (SIMS) is a syndrome of severe pulmonary hypertension and right heart failure that develops in infants born in the lowlands and subsequently brought to live at high altitudes. Earlier postmortem studies have demonstrated significant remodeling of small pulmonary arteries as well as right ventricular hypertrophy and dilatation. In this report, we present a case of SIMS in a Kyrgyz child born to a native highlander mother evaluated by conventional echocardiography and tissue Doppler imaging. An echocardiogram showed severe pulmonary hypertension, a markedly dilated right ventricle with flattening of interventricular septum, and right ventricular dysfunction. To our knowledge, this is the first report of noninvasive imaging of pulmonary circulation and right ventricle in an infant with SIMS and confirmed the diagnosis using echocardiography.
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Affiliation(s)
- Kubatbek Muratali Uulu
- 1 Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine , Bishkek, Kyrgyzstan .,2 Kyrgyz-Indian Mountain Biomedical Research Center , Bishkek, Kyrgyzstan
| | - Meerim Cholponbaeva
- 1 Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine , Bishkek, Kyrgyzstan .,2 Kyrgyz-Indian Mountain Biomedical Research Center , Bishkek, Kyrgyzstan
| | - Melis Duishobaev
- 1 Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine , Bishkek, Kyrgyzstan .,2 Kyrgyz-Indian Mountain Biomedical Research Center , Bishkek, Kyrgyzstan
| | - Aidana Toktosunova
- 1 Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine , Bishkek, Kyrgyzstan .,2 Kyrgyz-Indian Mountain Biomedical Research Center , Bishkek, Kyrgyzstan
| | - Abdirashit Maripov
- 1 Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine , Bishkek, Kyrgyzstan .,2 Kyrgyz-Indian Mountain Biomedical Research Center , Bishkek, Kyrgyzstan
| | - Akylbek Sydykov
- 1 Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine , Bishkek, Kyrgyzstan .,3 Department of Internal Medicine, Excellence Cluster Cardio-Pulmonary System (ECCPS), Justus Liebig University of Giessen , Giessen, Germany
| | - Akpay Sarybaev
- 1 Department of Mountain and Sleep Medicine and Pulmonary Hypertension, National Center of Cardiology and Internal Medicine , Bishkek, Kyrgyzstan .,2 Kyrgyz-Indian Mountain Biomedical Research Center , Bishkek, Kyrgyzstan
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Amirjanians M, Egemnazarov B, Sydykov A, Kojonazarov B, Brandes R, Luitel H, Pradhan K, Stasch JP, Redlich G, Weissmann N, Grimminger F, Seeger W, Ghofrani H, Schermuly R. Chronic intratracheal application of the soluble guanylyl cyclase stimulator BAY 41-8543 ameliorates experimental pulmonary hypertension. Oncotarget 2018; 8:29613-29624. [PMID: 28410199 PMCID: PMC5444690 DOI: 10.18632/oncotarget.16769] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 03/08/2017] [Indexed: 12/26/2022] Open
Abstract
Dysfunction of the NO/sGC/cGMP signaling pathway has been implicated in the pathogenesis of pulmonary hypertension (PH). Therefore, agents stimulating cGMP synthesis via sGC are important therapeutic options for treatment of PH patients. An unwanted effect of this novel class of drugs is their systemic hypotensive effect. We tested the hypothesis that aerosolized intra-tracheal delivery of the sGC stimulator BAY41-8543 could diminish its systemic vasodilating effect.Pharmacodynamics and -kinetics of BAY41-8543 after single intra-tracheal delivery was tested in healthy rats. Four weeks after a single injection of monocrotaline (MCT, 60 mg/kg s.c.), rats were randomized to a two-week treatment with either placebo, BAY 41-8543 (10 mg/kg per os (PO)) or intra-tracheal (IT) instillation (3 mg/kg or 1 mg/kg).Circulating concentrations of the drug 10 mg/kg PO and 3 mg/kg IT were comparable. BAY 41-8543 was detected in the lung tissue and broncho-alveolar fluid after IT delivery at higher concentrations than after PO administration. Systemic arterial pressure transiently decreased after oral BAY 41-8543 and was unaffected by intratracheal instillation of the drug. PO 10 mg/kg and IT 3 mg/kg regimens partially reversed pulmonary hypertension and improved heart function in MCT-injected rats. Minor efficacy was noted in rats treated IT with 1 mg/kg. The degree of pulmonary vascular remodeling was largely reversed in all treatment groups.Intratracheal administration of BAY 41-8543 reverses PAH and vascular structural remodeling in MCT-treated rats. Local lung delivery is not associated with systemic blood pressure lowering and represents thus a further development of PH treatment with sGC stimulators.
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Affiliation(s)
| | | | | | | | - Ralf Brandes
- Institute for Cardiovascular Physiology, J.W. Goethe University, Frankfurt, Germany
| | - Himal Luitel
- University of Giessen Lung Center, Giessen, Germany
| | | | - Johannes-Peter Stasch
- Cardiology Research, Pharmaceuticals, Bayer AG, Wuppertal, Germany.,Institute of Pharmacy, Martin Luther University of Halle Wittenberg, Halle, Germany
| | - Gorden Redlich
- Research Pharmacokinetics, Pharmaceuticals, Bayer AG, Wuppertal, Germany
| | | | | | - Werner Seeger
- University of Giessen Lung Center, Giessen, Germany.,Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | | | - Ralph Schermuly
- University of Giessen Lung Center, Giessen, Germany.,Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
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Pak O, Scheibe S, Esfandiary A, Gierhardt M, Sydykov A, Logan A, Fysikopoulos A, Veit F, Hecker M, Kroschel F, Quanz K, Erb A, Schäfer K, Fassbinder M, Alebrahimdehkordi N, Ghofrani HA, Schermuly RT, Brandes RP, Seeger W, Murphy MP, Weissmann N, Sommer N. Impact of the mitochondria-targeted antioxidant MitoQ on hypoxia-induced pulmonary hypertension. Eur Respir J 2018; 51:1701024. [PMID: 29419444 DOI: 10.1183/13993003.01024-2017] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Increased mitochondrial reactive oxygen species (ROS), particularly superoxide have been suggested to mediate hypoxic pulmonary vasoconstriction (HPV), chronic hypoxia-induced pulmonary hypertension (PH) and right ventricular (RV) remodelling.We determined ROS in acute, chronic hypoxia and investigated the effect of the mitochondria-targeted antioxidant MitoQ under these conditions.The effect of MitoQ or its inactive carrier substance, decyltriphenylphosphonium (TPP+), on acute HPV (1% O2 for 10 minutes) was investigated in isolated blood-free perfused mouse lungs. Mice exposed for 4 weeks to chronic hypoxia (10% O2) or after banding of the main pulmonary artery (PAB) were treated with MitoQ or TPP+ (50 mg/kg/day).Total cellular superoxide and mitochondrial ROS levels were increased in pulmonary artery smooth muscle cells (PASMC), but decreased in pulmonary fibroblasts in acute hypoxia. MitoQ significantly inhibited HPV and acute hypoxia-induced rise in superoxide concentration. ROS was decreased in PASMC, while it increased in the RV after chronic hypoxia. Correspondingly, MitoQ did not affect the development of chronic hypoxia-induced PH, but attenuated RV remodelling after chronic hypoxia as well as after PAB.Increased mitochondrial ROS of PASMC mediate acute HPV, but not chronic hypoxia-induced PH. MitoQ may be beneficial under conditions of exaggerated acute HPV.
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Affiliation(s)
- Oleg Pak
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Susan Scheibe
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Azadeh Esfandiary
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Mareike Gierhardt
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Akylbek Sydykov
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Angela Logan
- MRC Mitochondrial Biology Unit, CB2 0XY Cambridge, United Kingdom
| | - Athanasios Fysikopoulos
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Florian Veit
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Matthias Hecker
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Florian Kroschel
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Karin Quanz
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Alexandra Erb
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Katharina Schäfer
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Mirja Fassbinder
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Nasim Alebrahimdehkordi
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Hossein A Ghofrani
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Ralph T Schermuly
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Ralf P Brandes
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner site RheinMain, 60590 Frankfurt am Main, Germany
| | - Werner Seeger
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
- Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Michael P Murphy
- MRC Mitochondrial Biology Unit, CB2 0XY Cambridge, United Kingdom
| | - Norbert Weissmann
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
| | - Natascha Sommer
- Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Justus-Liebig-University, 35392 Giessen, Germany
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Luitel H, Sydykov A, Schymura Y, Mamazhakypov A, Janssen W, Pradhan K, Wietelmann A, Kosanovic D, Dahal BK, Weissmann N, Seeger W, Grimminger F, Ghofrani HA, Schermuly RT. Pressure overload leads to an increased accumulation and activity of mast cells in the right ventricle. Physiol Rep 2017; 5:5/6/e13146. [PMID: 28330950 PMCID: PMC5371552 DOI: 10.14814/phy2.13146] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 12/20/2016] [Accepted: 01/09/2017] [Indexed: 01/11/2023] Open
Abstract
Right ventricular (RV) remodeling represents a complex set of functional and structural adaptations in response to chronic pressure or volume overload due to various inborn defects or acquired diseases and is an important determinant of patient outcome. However, the underlying molecular mechanisms remain elusive. We investigated the time course of structural and functional changes in the RV in the murine model of pressure overload‐induced RV hypertrophy in C57Bl/6J mice. Using magnetic resonance imaging, we assessed the changes of RV structure and function at different time points for a period of 21 days. Pressure overload led to significant dilatation, cellular and chamber hypertrophy, myocardial fibrosis, and functional impairment of the RV. Progressive remodeling of the RV after pulmonary artery banding (PAB) in mice was associated with upregulation of myocardial gene markers of hypertrophy and fibrosis. Furthermore, remodeling of the RV was associated with accumulation and activation of mast cells in the RV tissue of PAB mice. Our data suggest possible involvement of mast cells in the RV remodeling process in response to pressure overload. Mast cells may thus represent an interesting target for the development of new therapeutic approaches directed specifically at the RV.
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Affiliation(s)
- Himal Luitel
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
| | - Akylbek Sydykov
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
| | - Yves Schymura
- Department of Lung Development and Remodelling, Max-Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Argen Mamazhakypov
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
| | - Wiebke Janssen
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany.,Department of Lung Development and Remodelling, Max-Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Kabita Pradhan
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
| | - Astrid Wietelmann
- Max-Planck Institute for Heart and Lung Research MRI Service Group, Bad Nauheim, Germany
| | - Djuro Kosanovic
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
| | - Bhola Kumar Dahal
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
| | - Norbert Weissmann
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
| | - Werner Seeger
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany.,Department of Lung Development and Remodelling, Max-Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Friedrich Grimminger
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
| | - Hossein Ardeschir Ghofrani
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
| | - Ralph Theo Schermuly
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center Member of the German Lung Center Justus-Liebig-University Giessen, Giessen, Germany
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36
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Malczyk M, Erb A, Veith C, Ghofrani HA, Schermuly RT, Gudermann T, Dietrich A, Weissmann N, Sydykov A. The Role of Transient Receptor Potential Channel 6 Channels in the Pulmonary Vasculature. Front Immunol 2017; 8:707. [PMID: 28670316 PMCID: PMC5472666 DOI: 10.3389/fimmu.2017.00707] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 05/31/2017] [Indexed: 01/21/2023] Open
Abstract
Canonical or classical transient receptor potential channel 6 (TRPC6) is a Ca2+-permeable non-selective cation channel that is widely expressed in the heart, lung, and vascular tissues. The use of TRPC6-deficient (“knockout”) mice has provided important insights into the role of TRPC6 in normal physiology and disease states of the pulmonary vasculature. Evidence indicates that TRPC6 is a key regulator of acute hypoxic pulmonary vasoconstriction. Moreover, several studies implicated TRPC6 in the pathogenesis of pulmonary hypertension. Furthermore, a unique genetic variation in the TRPC6 gene promoter has been identified, which might link the inflammatory response to the upregulation of TRPC6 expression and ultimate development of pulmonary vascular abnormalities in idiopathic pulmonary arterial hypertension. Additionally, TRPC6 is critically involved in the regulation of pulmonary vascular permeability and lung edema formation during endotoxin or ischemia/reperfusion-induced acute lung injury. In this review, we will summarize latest findings on the role of TRPC6 in the pulmonary vasculature.
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Affiliation(s)
- Monika Malczyk
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Alexandra Erb
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Christine Veith
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Hossein Ardeschir Ghofrani
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Ralph T Schermuly
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Thomas Gudermann
- Walther Straub Institute for Pharmacology and Toxicology, Ludwig Maximilian University of Munich, German Center for Lung Research (DZL), Munich, Germany
| | - Alexander Dietrich
- Walther Straub Institute for Pharmacology and Toxicology, Ludwig Maximilian University of Munich, German Center for Lung Research (DZL), Munich, Germany
| | - Norbert Weissmann
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
| | - Akylbek Sydykov
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center (UGMLC), German Center for Lung Research (DZL), Justus Liebig University of Giessen, Giessen, Germany
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Sommer N, Hüttemann M, Pak O, Scheibe S, Knoepp F, Sinkler C, Malczyk M, Gierhardt M, Esfandiary A, Kraut S, Jonas F, Veith C, Aras S, Sydykov A, Alebrahimdehkordi N, Giehl K, Hecker M, Brandes RP, Seeger W, Grimminger F, Ghofrani HA, Schermuly RT, Grossman LI, Weissmann N. Mitochondrial Complex IV Subunit 4 Isoform 2 Is Essential for Acute Pulmonary Oxygen Sensing. Circ Res 2017; 121:424-438. [PMID: 28620066 DOI: 10.1161/circresaha.116.310482] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 12/14/2016] [Accepted: 06/14/2017] [Indexed: 12/17/2022]
Abstract
RATIONALE Acute pulmonary oxygen sensing is essential to avoid life-threatening hypoxemia via hypoxic pulmonary vasoconstriction (HPV) which matches perfusion to ventilation. Hypoxia-induced mitochondrial superoxide release has been suggested as a critical step in the signaling pathway underlying HPV. However, the identity of the primary oxygen sensor and the mechanism of superoxide release in acute hypoxia, as well as its relevance for chronic pulmonary oxygen sensing, remain unresolved. OBJECTIVES To investigate the role of the pulmonary-specific isoform 2 of subunit 4 of the mitochondrial complex IV (Cox4i2) and the subsequent mediators superoxide and hydrogen peroxide for pulmonary oxygen sensing and signaling. METHODS AND RESULTS Isolated ventilated and perfused lungs from Cox4i2-/- mice lacked acute HPV. In parallel, pulmonary arterial smooth muscle cells (PASMCs) from Cox4i2-/- mice showed no hypoxia-induced increase of intracellular calcium. Hypoxia-induced superoxide release which was detected by electron spin resonance spectroscopy in wild-type PASMCs was absent in Cox4i2-/- PASMCs and was dependent on cysteine residues of Cox4i2. HPV could be inhibited by mitochondrial superoxide inhibitors proving the functional relevance of superoxide release for HPV. Mitochondrial hyperpolarization, which can promote mitochondrial superoxide release, was detected during acute hypoxia in wild-type but not Cox4i2-/- PASMCs. Downstream signaling determined by patch-clamp measurements showed decreased hypoxia-induced cellular membrane depolarization in Cox4i2-/- PASMCs compared with wild-type PASMCs, which could be normalized by the application of hydrogen peroxide. In contrast, chronic hypoxia-induced pulmonary hypertension and pulmonary vascular remodeling were not or only slightly affected by Cox4i2 deficiency, respectively. CONCLUSIONS Cox4i2 is essential for acute but not chronic pulmonary oxygen sensing by triggering mitochondrial hyperpolarization and release of mitochondrial superoxide which, after conversion to hydrogen peroxide, contributes to cellular membrane depolarization and HPV. These findings provide a new model for oxygen-sensing processes in the lung and possibly also in other organs.
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Affiliation(s)
- Natascha Sommer
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Maik Hüttemann
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Oleg Pak
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Susan Scheibe
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Fenja Knoepp
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Christopher Sinkler
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Monika Malczyk
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Mareike Gierhardt
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Azadeh Esfandiary
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Simone Kraut
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Felix Jonas
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Christine Veith
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Siddhesh Aras
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Akylbek Sydykov
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Nasim Alebrahimdehkordi
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Klaudia Giehl
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Matthias Hecker
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Ralf P Brandes
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Werner Seeger
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Friedrich Grimminger
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Hossein A Ghofrani
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Ralph T Schermuly
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
| | - Lawrence I Grossman
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.).
| | - Norbert Weissmann
- From the Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), Member of the German Center for Lung Research (DZL), Justus-Liebig-University, Giessen, Germany (N.S., O.P., S.S., F.K., M.M., M.G., A.E., S.K., F.J., C.V., A.S., N.A., K.G., M.H., W.S., F.G., H.A.G., R.T.S., N.W.); Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI (M.H., C.S., S.A., L.I.G.); Institut für Kardiovaskuläre Physiologie, Goethe-Universität, German Center for Cardiovascular Research (DZHK), Partner Site RheinMain, Frankfurt am Main, Germany (R.P.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (W.S.)
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Pradhan K, Sydykov A, Tian X, Mamazhakypov A, Neupane B, Luitel H, Weissmann N, Seeger W, Grimminger F, Kretschmer A, Stasch JP, Ghofrani HA, Schermuly RT. Soluble guanylate cyclase stimulator riociguat and phosphodiesterase 5 inhibitor sildenafil ameliorate pulmonary hypertension due to left heart disease in mice. Int J Cardiol 2016; 216:85-91. [PMID: 27140341 DOI: 10.1016/j.ijcard.2016.04.098] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 04/11/2016] [Indexed: 01/27/2023]
Abstract
BACKGROUND Presence of pulmonary hypertension (PH) and right ventricular dysfunction worsens prognosis in patients with chronic heart failure (CHF). Preclinical and clinical studies suggest a role for the impaired nitric oxide (NO)-soluble guanylate cyclase (sGC)-cyclic guanosine monophosphate (cGMP) signaling pathway in both PH and CHF. Hence, we examined the effects of the NO-sGC-cGMP pathway modulation by the PDE5 inhibitor sildenafil or sGC stimulator riociguat on pulmonary hemodynamics and heart function in a murine model of secondary PH induced by transverse aortic constriction. METHODS C57Bl/6N mice were subjected to transverse aortic constriction (TAC) for 6weeks to induce left heart failure and secondary PH and were subsequently treated with either sildenafil (100mg/kg/day) or riociguat (10mg/kg/day) or placebo for 2weeks. RESULTS Six weeks after surgery, TAC induced significant left ventricular hypertrophy and dysfunction associated with development of PH. Treatment with riociguat and sildenafil neither reduced left ventricular hypertrophy nor improved its function. However, both sildenafil and riociguat ameliorated PH, reduced pulmonary vascular remodeling and improved right ventricular function. CONCLUSIONS Thus, modulation of the NO-sGC-cGMP pathway by the PDE5 inhibitor sildenafil or sGC stimulator riociguat exerts direct beneficial effects on pulmonary hemodynamics and right ventricular function in the experimental model of secondary PH due to left heart disease and these drugs may offer a new therapeutic option for therapy of this condition.
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Affiliation(s)
- Kabita Pradhan
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany
| | - Akylbek Sydykov
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany
| | - Xia Tian
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany
| | - Argen Mamazhakypov
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany
| | - Balram Neupane
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany
| | - Himal Luitel
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany
| | - Norbert Weissmann
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany
| | - Werner Seeger
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany; Max-Planck-Institute for Heart and Lung Research, Parkstraße 1, 61231 Bad Nauheim, Germany
| | - Friedrich Grimminger
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany
| | - Axel Kretschmer
- Bayer HealthCare, Aprather Weg 18a, 42096, Wuppertal, Germany
| | | | - Hossein Ardeschir Ghofrani
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany
| | - Ralph Theo Schermuly
- Excellence Cluster Cardio-Pulmonary System, Universities of Giessen and Marburg Lung Center, Member of the German Lung Center, Justus Liebig University Giessen, Giessen, Germany.
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39
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Esfandiary A, Sommer N, Pak O, Kojonazarov B, Sydykov A, Haag D, Hecker M, Seeger W, Ghofrani HA, Schermuly R, Weissmann N, Schulz R, Schreckenberg R, Schlüter KD. Preserved right ventricular function in mitochondrial uncoupling protein 2 deficient mice in pressure overload induced right ventricular insufficiency. Pneumologie 2015. [DOI: 10.1055/s-0035-1556635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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40
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Egemnazarov B, Schmidt A, Crnkovic S, Sydykov A, Nagy BM, Kovacs G, Weissmann N, Olschewski H, Olschewski A, Kwapiszewska G, Marsh LM. Pressure Overload Creates Right Ventricular Diastolic Dysfunction in a Mouse Model: Assessment by Echocardiography. J Am Soc Echocardiogr 2015; 28:828-43. [PMID: 25840639 DOI: 10.1016/j.echo.2015.02.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Indexed: 10/23/2022]
Abstract
BACKGROUND Noninvasive diagnostic tools for right ventricular (RV) dysfunction measurements are increasingly being used, although their association with the pathologic mechanisms of dysfunction is poorly understood. Although investigations have focused mainly on RV systolic function, RV diastolic function remains mostly neglected. The aim of this study was to test which echocardiographic parameters best reflect RV diastolic function in mice. METHODS Pulmonary artery banding (PAB) was used to induce RV pressure overload in mice. Transthoracic echocardiography and invasive hemodynamic measurements were performed after 3 weeks in PAB and sham-operated mice. Subsequently, the hearts were investigated by histology and analyzed for gene expression. RESULTS PAB-induced pressure overload (RV systolic pressure PAB 52.6 ± 11.8 mm Hg vs sham 27.0 ± 2.7 mm Hg) resulted in RV hypertrophy and remodeling, as reflected by increased Fulton index (PAB 0.37 ± 0.05 vs sham 0.25 ± 0.02, P = .001). Masson's trichrome staining revealed increased interstitial fibrosis (PAB 12.25 ± 3.12% vs sham 3.97 ± 1.58%, P = .002). This was associated with significant systolic RV dysfunction as demonstrated by reduced contractility index and diastolic dysfunction as demonstrated by end-diastolic pressure (PAB 2.66 ± 0.83 mm Hg vs sham 1.49 ± 0.50 mm Hg, P < .001) and τ (PAB 40.0 ± 16.1 msec vs sham 13.0 ± 3.5 msec, P < .001). Messenger ribonucleic acid expression of β-myosin heavy chain, atrial and brain natriuretic peptides, collagen family members was elevated, and the sarco/endoplasmic reticulum Ca(2+)-ATPase was decreased. Echocardiography revealed significant increases in RV free wall thickness and isovolumic relaxation time and a decrease in left ventricular eccentricity index, E', and tricuspid annular plane systolic excursion. Isovolumic relaxation time and E' were significantly correlated with end-diastolic pressure (rs = 0.511 and -0.451) and τ (rs = 0.739 and -0.445, respectively). Moreover, E' was negatively correlated with the degree of RV fibrosis (rs = -0.717). CONCLUSIONS Within 3 weeks, PAB causes pressure overload-induced RV hypertrophy and remodeling with compensated systolic and diastolic dysfunction in mice. RV free wall thickness, tricuspid annular plane systolic excursion, E', E/E' ratio, and isovolumic relaxation time appear to be the most reliable echocardiographic parameters for the assessment of RV dysfunction.
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Affiliation(s)
| | - Albrecht Schmidt
- Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Slaven Crnkovic
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
| | - Akylbek Sydykov
- University of Giessen and Marburg Lung Center, Excellence Cluster Cardio-Pulmonary System, Giessen, Germany
| | - Bence M Nagy
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Gabor Kovacs
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria; Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Norbert Weissmann
- University of Giessen and Marburg Lung Center, Excellence Cluster Cardio-Pulmonary System, Giessen, Germany
| | - Horst Olschewski
- Division of Pulmonology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Andrea Olschewski
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria; Experimental Anesthesiology, Department of Anesthesia and Intensive Care Medicine, Medical University of Graz, Graz, Austria
| | - Grazyna Kwapiszewska
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria; Experimental Anesthesiology, Department of Anesthesia and Intensive Care Medicine, Medical University of Graz, Graz, Austria
| | - Leigh M Marsh
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Austria
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41
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Kojonazarov B, Luitel H, Sydykov A, Dahal BK, Paul-Clark MJ, Bonvini S, Reed A, Schermuly RT, Mitchell JA. The peroxisome proliferator-activated receptor β/δ agonist GW0742 has direct protective effects on right heart hypertrophy. Pulm Circ 2014; 3:926-35. [PMID: 25006409 DOI: 10.1086/674755] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 08/21/2013] [Indexed: 12/15/2022] Open
Abstract
Pulmonary hypertension is a debilitating disease with no cure. We have previously shown that peroxisome proliferator-activated receptor (PPAR) β/δ agonists protect the right heart in hypoxia-driven pulmonary hypertension without affecting vascular remodeling. PPARβ/δ is an important receptor in lipid metabolism, athletic performance, and the sensing of prostacyclin. Treatment of right heart hypertrophy and failure in pulmonary hypertension is an emerging target for future therapy. Here we have investigated the potential of GW0742, a PPARβ agonist, to act directly on the right heart in vivo and what transcriptomic signatures are associated with its actions. Right heart hypertrophy and failure was induced in mice using a pulmonary artery banding (PAB) model. GW0742 was administered throughout the study. Cardiovascular parameters were measured using echocardiography and pressure monitoring. Fibrosis and cellular changes were measured using immunohistochemistry. Transcriptomics were measured using the Illumina MouseRef-8v3 BeadChip array and analyzed using GeneSpring GX (ver. 11.0). PAB resulted in right heart hypertrophy and failure and in increased fibrosis. GW0742 reduced or prevented the effects of PAB on all parameters measured. GW0742 altered a number of genes in the transcriptome, with Angptl4 emerging as the top gene altered (increased) in animals with PAB. In conclusion, the PPARβ/δ agonist GW0742 has direct protective effects on the right heart in vivo. These observations identify PPARβ/δ as a viable therapeutic target to treat pulmonary hypertension that may complement current and future vasodilator drugs.
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Affiliation(s)
| | - Himal Luitel
- Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Akylbek Sydykov
- Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Bhola K Dahal
- Universities of Giessen and Marburg Lung Center, Giessen, Germany
| | - Mark J Paul-Clark
- Cardiothoracic Pharmacology, National Heart and Lung Institute, Imperial College, London, United Kingdom
| | - Sara Bonvini
- Cardiothoracic Pharmacology, National Heart and Lung Institute, Imperial College, London, United Kingdom
| | - Anna Reed
- Cardiothoracic Pharmacology, National Heart and Lung Institute, Imperial College, London, United Kingdom
| | | | - Jane A Mitchell
- Cardiothoracic Pharmacology, National Heart and Lung Institute, Imperial College, London, United Kingdom
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42
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Pak O, Kressig F, Esfandiary A, Sydykov A, Kojonazarov B, Veit F, Schermuly RT, Grimminger F, Ghofrani HA, Seeger W, Weissmann N, Sommer N. Defizienz des mitochondrialen Entkopplungsproteins „Uncoupling Protein 2“ als neues Modell der pulmonalen Hypertonie. Pneumologie 2014. [DOI: 10.1055/s-0033-1363109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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43
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Weisel F, Kloepping C, Pichl A, Sydykov A, Kojonazarov B, Wilhelm J, Roth M, Ridge K, Ghofrani HA, Schermuly R, Grimminger F, Seeger W, Weißmann N, Kwapiszewska G. Die Rolle von AMD-1 in vaskulären Umbauprozessen bei pulmonaler Hypertonie. Pneumologie 2013. [DOI: 10.1055/s-0033-1344711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- F. Weisel
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - C. Kloepping
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - A. Pichl
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - A. Sydykov
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - B. Kojonazarov
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - J. Wilhelm
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - M. Roth
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - K. Ridge
- Division of Pulmonary and Critical Care Medicine Northwestern University, Chicago, Illinois, USA,
| | - H.-A. Ghofrani
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - R. Schermuly
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - F. Grimminger
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - W. Seeger
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - N. Weißmann
- Universities of Giessen and Marburg Lung Center (UGMLC), Deutsches Zentrum für Lungenforschung (DZL), Excellence Cluster Cardio-Pulmonary System (ECCPS), Giessen, Deutschland,
| | - G. Kwapiszewska
- Ludwig Boltzmann Institute for Lung Vascular Research, Graz, Österreich
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Pak O, Sommer N, Hoeres T, Bakr A, Waisbrod S, Sydykov A, Haag D, Esfandiary A, Kojonazarov B, Veit F, Fuchs B, Weisel FC, Hecker M, Schermuly RT, Grimminger F, Ghofrani HA, Seeger W, Weissmann N. Mitochondrial hyperpolarization in pulmonary vascular remodeling. Mitochondrial uncoupling protein deficiency as disease model. Am J Respir Cell Mol Biol 2013; 49:358-67. [PMID: 23590303 DOI: 10.1165/rcmb.2012-0361oc] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Alterations of mitochondrial membrane potential (MMP), reactive oxygen species (ROS), and mitochondrial respiration are possible triggers of pulmonary vascular remodeling in pulmonary hypertension (PH). We investigated the role of MMP in PH and hypothesized that deletion of the mitochondrial uncoupling protein 2 (UCP2) increases MMP, thus promoting pulmonary vascular remodeling and PH. MMP was measured by JC-1 in isolated pulmonary arterial smooth muscle cells (PASMCs) of patients with PH and animals with PH induced by exposure to monocrotaline (MCT) or chronic hypoxia. PH was quantified in vivo in UCP2-deficient (UCP2(-/-)) mice by hemodynamics, morphometry, and echocardiography. ROS were measured by electron spin resonance spectroscopy and proliferation by thymidine incorporation. Mitochondrial respiration was investigated by high-resolution respirometry. MMP was increased in PASMCs of patients and in animal models of PH. UCP2(-/-) mice exhibited pulmonary vascular remodeling and mild PH compared with wild-type (WT) mice. PASMCs of UCP2(-/-) mice showed increased proliferation, MMP, and ROS release. Increased proliferation of UCP2(-/-) PASMCs could be attenuated by ROS inhibitors and inhibited by carbonyl cyanide 4-(trifluoromethoxy)phenylhydrazone, which decreased MMP to the level of WT mice. Mitochondrial respiration was altered in PASMCs from MCT rats and PASMCs exposed to hypoxia but not in isolated pulmonary mitochondria of UCP2(-/-) mice or PASMCs after treatment with small interfering RNA for UCP2. Our data suggest that increased MMP causes vascular remodeling in UCP2(-/-) mice partially via increased ROS. In chronic hypoxia and MCT-induced PH, additional pathomechanisms such as decreased respiration may play a role.
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Affiliation(s)
- Oleg Pak
- Excellence Cluster Cardio-Pulmonary System, University of Giessen and Marburg Lung Center, Justus-Liebig-University, Giessen, Germany
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Bayat B, Tjahjono Y, Sydykov A, Werth S, Hippenstiel S, Weissmann N, Sachs UJ, Santoso S. Anti-human neutrophil antigen-3a induced transfusion-related acute lung injury in mice by direct disturbance of lung endothelial cells. Arterioscler Thromb Vasc Biol 2013; 33:2538-48. [PMID: 24008160 DOI: 10.1161/atvbaha.113.301206] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Antibodies against human neutrophil antigen-3a (HNA-3a) located on choline transporter-like protein 2 induce severe transfusion-related acute lung injury (TRALI). This study aims to identify the mechanism implicated in anti-HNA-3a-mediated TRALI. APPROACH AND RESULTS Our analysis shows that anti-HNA-3a recognizes 2 choline transporter-like protein 2 isoforms (P1 and P2) on human microvascular endothelial cells from lung blood vessels but reacts only with the P1 isoform on neutrophils. Direct treatment of HNA-3a-positive endothelial cells with anti-HNA-3a, but not with anti-HNA-3b, leads to reactive oxygen species production, increased albumin influx, and decreased endothelial resistance associated with the formation of actin stress filaments and loosening of junctional vascular endothelium-cadherin. In a novel in vivo mouse model, TRALI was documented by significant increase in lung water content, albumin concentration, and neutrophil numbers in the bronchoalveolar lavage on injection of human anti-HNA-3a in lipopolysaccharides-treated, as well as nontreated mice. Interestingly, although neutrophil depletion alleviated severity of lung injury, it failed to prevent TRALI in this model. Infusion of anti-HNA-3a F(ab')2 fragments caused moderate TRALI. Finally, mice lacking nicotinamide adenine dinucleotide phosphate oxidase (NOX2(y/-)) were protected from anti-HNA-3a-mediated TRALI. CONCLUSIONS These data demonstrate the initiation of endothelial barrier dysfunction in vitro and in vivo by direct binding of anti-HNA-3a on endothelial cells. It seems, however, that the presence of neutrophils aggravates barrier dysfunction. This novel mechanism of TRALI primarily mediated by endothelial cell dysfunction via choline transporter-like protein 2 may help to define new treatment strategies to decrease TRALI-related mortality.
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Affiliation(s)
- Behnaz Bayat
- From the Institute for Clinical Immunology and Transfusion Medicine, Justus Liebig University, Giessen, Germany (B.B., Y.T., S.W., U.J.S., S.S.); Department of Internal Medicine II/V, ECCPS, University of Giessen and Marburg Lung Center (UGMLC), Member of the DZL, Giessen, Germany (A.S., N.W.); and Department of Infectious Diseases and Respiratory Medicine of the Charité Medical University, Berlin, Germany (S.H.)
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46
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Maripov A, Mamazhakypov A, Karagulova G, Sydykov A, Sarybaev A. High altitude pulmonary hypertension with severe right ventricular dysfunction. Int J Cardiol 2013; 168:e89-90. [PMID: 23911270 DOI: 10.1016/j.ijcard.2013.07.129] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 07/13/2013] [Indexed: 11/28/2022]
Affiliation(s)
- Abdirashit Maripov
- Department of Pulmonary Hypertension and Mountain Medicine, National Center of Cardiology and Internal Medicine, Bishkek, Kyrgyzstan; Kyrgyz-Indian Mountain Biomedical Research Center, Bishkek, Kyrgyzstan.
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Kojonazarov B, Sydykov A, Pullamsetti S, Luitel H, Dahal BK, Kosanovic D, Tian X, Majewski M, Baumann C, Evans S, Phillips P, Fairman D, Davie N, Wayman C, Kilty I, Weissmann N, Grimminger F, Seeger W, Ghofrani H, Schermuly R. Effects of Multikinase inhibitors on pressure overload-induced right ventricular remodelling. J Inflamm (Lond) 2013. [PMCID: PMC3750852 DOI: 10.1186/1476-9255-10-s1-p37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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48
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Kojonazarov B, Sydykov A, Pullamsetti SS, Luitel H, Dahal BK, Kosanovic D, Tian X, Majewski M, Baumann C, Evans S, Phillips P, Fairman D, Davie N, Wayman C, Kilty I, Weissmann N, Grimminger F, Seeger W, Ghofrani HA, Schermuly RT. Effects of multikinase inhibitors on pressure overload-induced right ventricular remodeling. Int J Cardiol 2012; 167:2630-7. [PMID: 22854298 DOI: 10.1016/j.ijcard.2012.06.129] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 04/16/2012] [Accepted: 06/24/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND Little is known about the effects of current PAH therapies and receptor tyrosine kinase inhibitors on heart remodeling. We sought to investigate the effects of the multikinase inhibitors sunitinib (PDGFR-, VEGFR- and KIT-inhibitor) and sorafenib (raf1/b-, VEGFR-, PDGFR-inhibitor) on pressure overload induced right ventricular (RV) remodeling. METHODS We investigated the effects of the kinase inhibitors on hemodynamics and remodeling in rats subjected either to monocrotaline (MCT)-induced PH or to surgical pulmonary artery banding (PAB). MCT rats were treated from days 21 to 35 with either vehicle, sunitinib (1mg/kg, 5mg/kg and 10mg/kg/day) or sorafenib (10mg/kg/day). PAB rats were treated with vehicle, sunitinib (10mg/kg/day) or sorafenib (10mg/kg/day) from days 7 to 21. RV function and remodeling were determined using echocardiography, invasive hemodynamic measurement and histomorphometry. RESULTS Treatment with both sorafenib and sunitinib decreased right ventricular systolic pressure, pulmonary vascular remodeling, RV hypertrophy and fibrosis in MCT rats. This was associated with an improvement of RV function. Importantly, after PAB, both compounds reversed RV chamber and cellular hypertrophy, reduced RV interstitial and perivascular fibrosis, and improved RV function. CONCLUSION We demonstrated that sunitinib and sorafenib reversed RV remodeling and significantly improved RV function measured via a range of invasive and non-invasive cardiopulmonary endpoints in experimental models of RV hypertrophy.
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Affiliation(s)
- Baktybek Kojonazarov
- Department of Internal Medicine, Justus-Liebig-University Giessen, Universities of Giessen and Marburg Lung Center, Member of the German Center for Lung Research, Germany
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49
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Luitel H, Sydykov A, Pradhan K, Kojonazarov B, Janssen W, Weissmann N, Seeger W, Grimminger F, Ghofrani HA, Schermuly RT. Mast cells in chronic pressure overload induced right ventricular hypertrophy. Pneumologie 2012. [DOI: 10.1055/s-0032-1315543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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50
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Seidler K, Sydykov A, Müller-Brüsselbach S, Müller R, Weißmann N, Renz H, Nockher A. Nerve Growth Factor overexpression in Clara cells suppresses metastasis and tumor growth in a mouse model of experimental lung metastasis. Pneumologie 2012. [DOI: 10.1055/s-0032-1315526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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