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Zhang Q, Yaoita N, Tabuchi A, Liu S, Chen SH, Li Q, Hegemann N, Li C, Rodor J, Timm S, Laban H, Finkel T, Stevens T, Alvarez DF, Erfinanda L, de Perrot M, Kucherenko MM, Knosalla C, Ochs M, Dimmeler S, Korff T, Verma S, Baker AH, Kuebler WM. Endothelial Heterogeneity in the Response to Autophagy Drives Small Vessel Muscularization in Pulmonary Hypertension. Circulation 2024; 150:466-487. [PMID: 38873770 DOI: 10.1161/circulationaha.124.068726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 04/18/2024] [Indexed: 06/15/2024]
Abstract
BACKGROUND Endothelial cell (EC) apoptosis and proliferation of apoptosis-resistant cells is a hallmark of pulmonary hypertension (PH). Yet, why some ECs die and others proliferate and how this contributes to vascular remodeling is unclear. We hypothesized that this differential response may: (1) relate to different EC subsets, namely pulmonary artery (PAECs) versus microvascular ECs (MVECs); (2) be attributable to autophagic activation in both EC subtypes; and (3) cause replacement of MVECs by PAECs with subsequent distal vessel muscularization. METHODS EC subset responses to chronic hypoxia were assessed by single-cell RNA sequencing of murine lungs. Proliferative versus apoptotic responses, activation, and role of autophagy were assessed in human and rat PAECs and MVECs, and in precision-cut lung slices of wild-type mice or mice with endothelial deficiency in the autophagy-related gene 7 (Atg7EN-KO). Abundance of PAECs versus MVECs in precapillary microvessels was assessed in lung tissue from patients with PH and animal models on the basis of structural or surface markers. RESULTS In vitro and in vivo, PAECs proliferated in response to hypoxia, whereas MVECs underwent apoptosis. Single-cell RNA sequencing analyses support these findings in that hypoxia induced an antiapoptotic, proliferative phenotype in arterial ECs, whereas capillary ECs showed a propensity for cell death. These distinct responses were prevented in hypoxic Atg7EN-KO mice or after ATG7 silencing, yet replicated by autophagy stimulation. In lung tissue from mice, rats, or patients with PH, the abundance of PAECs in precapillary arterioles was increased, and that of MVECs reduced relative to controls, indicating replacement of microvascular by macrovascular ECs. EC replacement was prevented by genetic or pharmacological inhibition of autophagy in vivo. Conditioned medium from hypoxic PAECs yet not MVECs promoted pulmonary artery smooth muscle cell proliferation and migration in a platelet-derived growth factor-dependent manner. Autophagy inhibition attenuated PH development and distal vessel muscularization in preclinical models. CONCLUSIONS Autophagic activation by hypoxia induces in parallel PAEC proliferation and MVEC apoptosis. These differential responses cause a progressive replacement of MVECs by PAECs in precapillary pulmonary arterioles, thus providing a macrovascular context that in turn promotes pulmonary artery smooth muscle cell proliferation and migration, ultimately driving distal vessel muscularization and the development of PH.
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Affiliation(s)
- Qi Zhang
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
- Department of Cardiology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China (Q.Z.)
| | - Nobuhiro Yaoita
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
| | - Arata Tabuchi
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
| | - Shaofei Liu
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
- German Center for Cardiovascular Research, Partner Site Berlin (S.L., N.H., M.M.K., C.K., W.M.K.)
| | - Shiau-Haln Chen
- Centre for Cardiovascular Science, University of Edinburgh, United Kingdom (S.-H.C., J.R., A.H.B.)
| | - Qiuhua Li
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
| | - Niklas Hegemann
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
- German Center for Cardiovascular Research, Partner Site Berlin (S.L., N.H., M.M.K., C.K., W.M.K.)
- Department of Cardiothoracic and Vascular Surgery, Deutsches Herzzentrum der Charité, Berlin, Germany (N.H., M.M.K., C.K.)
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Germany (N.H., M.M.K., C.K.)
| | - Caihong Li
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
| | - Julie Rodor
- Centre for Cardiovascular Science, University of Edinburgh, United Kingdom (S.-H.C., J.R., A.H.B.)
| | - Sara Timm
- Core Facility Electron Microscopy (S.T., M.O.), Charité-Universitätsmedizin, Berlin, Germany
| | - Hebatullah Laban
- Institute of Physiology and Pathophysiology, Department of Cardiovascular Physiology (H.L.), Heidelberg University, Germany
- German Center for Cardiovascular Research, Partner Site Heidelberg/Mannheim, Heidelberg (H.L.)
| | - Toren Finkel
- Department of Medicine, Division of Cardiology, University of Pittsburgh, PA (T.F.)
| | - Troy Stevens
- Department of Physiology and Cell Biology, College of Medicine, University of South Alabama, Mobile (T.S.)
| | - Diego F Alvarez
- Department of Physiology and Pharmacology, College of Osteopathic Medicine, Sam Houston State University, Conroe, TX (D.F.A.)
| | - Lasti Erfinanda
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
| | - Marc de Perrot
- Division of Thoracic Surgery, Toronto General Hospital, Canada (M.d.P.)
- Department of Surgery (M.d.P., W.M.K.), University of Toronto, Canada
| | - Mariya M Kucherenko
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
- German Center for Cardiovascular Research, Partner Site Berlin (S.L., N.H., M.M.K., C.K., W.M.K.)
- Department of Cardiothoracic and Vascular Surgery, Deutsches Herzzentrum der Charité, Berlin, Germany (N.H., M.M.K., C.K.)
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Germany (N.H., M.M.K., C.K.)
| | - Christoph Knosalla
- German Center for Cardiovascular Research, Partner Site Berlin (S.L., N.H., M.M.K., C.K., W.M.K.)
- Department of Cardiothoracic and Vascular Surgery, Deutsches Herzzentrum der Charité, Berlin, Germany (N.H., M.M.K., C.K.)
- Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt Universität zu Berlin, Germany (N.H., M.M.K., C.K.)
| | - Matthias Ochs
- Core Facility Electron Microscopy (S.T., M.O.), Charité-Universitätsmedizin, Berlin, Germany
- Institute of Functional Anatomy (M.O.), Charité-Universitätsmedizin, Berlin, Germany
| | - Stefanie Dimmeler
- Institute for Cardiovascular Regeneration, Centre for Molecular Medicine, Goethe University, Frankfurt am Main, Germany (S.D.)
| | - Thomas Korff
- Department of Cardiovascular Physiology, Institute of Physiology and Pathophysiology (T.K.), Heidelberg University, Germany
- European Center for Angioscience, Medical Faculty Mannheim (T.K.), Heidelberg University, Germany
| | - Subodh Verma
- Division of Cardiac Surgery (S.V.), University of Toronto, Canada
| | - Andrew H Baker
- Centre for Cardiovascular Science, University of Edinburgh, United Kingdom (S.-H.C., J.R., A.H.B.)
- Department of Pathology, Cardiovascular Research Institute Maastricht School for Cardiovascular Diseases, Maastricht University, The Netherlands (A.H.B.)
| | - Wolfgang M Kuebler
- Institute of Physiology (Q.Z., N.Y., A.T., S.L., Q.L., N.H., C.L., L.E., M.M.K., W.M.K.), Charité-Universitätsmedizin, Berlin, Germany
- German Center for Cardiovascular Research, Partner Site Berlin (S.L., N.H., M.M.K., C.K., W.M.K.)
- Department of Surgery (M.d.P., W.M.K.), University of Toronto, Canada
- Department of Physiology (W.M.K.), University of Toronto, Canada
- Keenan Research Centre, St Michael's Hospital, Canada (W.M.K.)
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Sommer C, Reamon-Buettner SM, Niehof M, Hildebrand CB, Braun A, Sewald K, Dehmel S, Brandenberger C. Age-dependent inflammatory response is altered in an ex vivo model of bacterial pneumonia. Respir Res 2024; 25:15. [PMID: 38178102 PMCID: PMC10765774 DOI: 10.1186/s12931-023-02609-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 11/14/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Aging is associated with an increased incidence and mortality of Pseudomonas aeruginosa-induced pneumonias. This might be partly due to age-dependent increases in inflammatory mediators, referred to as inflamm-aging and a decline in immune functions, known as immunosenescence. Still, the impact of dysregulated immune responses on lung infection during aging is poorly understood. Here, we aimed to mimic inflamm-aging using ex vivo precision-cut lung slices (PCLS) and neutrophils - as important effector cells of innate immunity - from young and old mice and investigated the influence of aging on inflammation upon infection with P. aeruginosa bacteria. METHODS Murine PCLS were infected with the P. aeruginosa standard lab strain PAO1 and a clinical P. aeruginosa isolate D61. After infection, whole-transcriptome analysis of the tissue as well as cytokine expression in supernatants and tissue lysates were performed. Responses of isolated neutrophils towards the bacteria were investigated by quantifying neutrophil extracellular trap (NET) formation, cytokine secretion, and analyzing expression of surface activation markers using flow cytometry. RESULTS Inflamm-aging was observed by transcriptome analysis, showing an enrichment of biological processes related to inflammation, innate immune response, and chemotaxis in uninfected PCLS of old compared with young mice. Upon P. aeruginosa infection, the age-dependent pro-inflammatory response was even further promoted as shown by increased production of cytokines and chemokines such as IL-1β, IL-6, CXCL1, TNF-α, and IL-17A. In neutrophil cultures, aging did not influence NET formation or cytokine secretion during P. aeruginosa infection. However, expression of receptors associated with inflammatory responses such as complement, adhesion, phagocytosis, and degranulation was lower in neutrophils stimulated with bacteria from old mice as compared to young animals. CONCLUSIONS By using PCLS and neutrophils from young and old mice as immunocompetent ex vivo test systems, we could mimic dysregulated immune responses upon aging on levels of gene expression, cytokine production, and receptor expression. The results furthermore reflect the exacerbation of inflammation upon P. aeruginosa lung infection as a result of inflamm-aging in old age.
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Affiliation(s)
- Charline Sommer
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany
- Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Member of Fraunhofer CIMD, Hannover, Germany
- Member of the German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH) research network, Hannover, Germany
| | - Stella Marie Reamon-Buettner
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany
- Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Member of Fraunhofer CIMD, Hannover, Germany
- Member of the German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH) research network, Hannover, Germany
| | - Monika Niehof
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany
- Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Member of Fraunhofer CIMD, Hannover, Germany
- Member of the German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH) research network, Hannover, Germany
| | - Christina Beatrix Hildebrand
- Member of the German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH) research network, Hannover, Germany
- Institute for Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
- Institute of Functional Anatomy, Charité - Universitätsmedizin Berlin, Philippstr. 11, Berlin, 10117, Germany
| | - Armin Braun
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany
- Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Member of Fraunhofer CIMD, Hannover, Germany
- Member of the German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH) research network, Hannover, Germany
| | - Katherina Sewald
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany
- Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Member of Fraunhofer CIMD, Hannover, Germany
- Member of the German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH) research network, Hannover, Germany
| | - Susann Dehmel
- Fraunhofer Institute for Toxicology and Experimental Medicine, Hannover, Germany.
- Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Member of Fraunhofer CIMD, Hannover, Germany.
- Member of the German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH) research network, Hannover, Germany.
| | - Christina Brandenberger
- Member of the German Center for Lung Research (DZL), Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH) research network, Hannover, Germany.
- Institute for Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany.
- Institute of Functional Anatomy, Charité - Universitätsmedizin Berlin, Philippstr. 11, Berlin, 10117, Germany.
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Grannemann C, Pabst A, Honert A, Schieren J, Martin C, Hank S, Böll S, Bläsius K, Düsterhöft S, Jahr H, Merkel R, Leube R, Babendreyer A, Ludwig A. Mechanical activation of lung epithelial cells through the ion channel Piezo1 activates the metalloproteinases ADAM10 and ADAM17 and promotes growth factor and adhesion molecule release. BIOMATERIALS ADVANCES 2023; 152:213516. [PMID: 37348330 DOI: 10.1016/j.bioadv.2023.213516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/25/2023] [Accepted: 06/09/2023] [Indexed: 06/24/2023]
Abstract
In the lung, pulmonary epithelial cells undergo mechanical stretching during ventilation. The associated cellular mechanoresponse is still poorly understood at the molecular level. Here, we demonstrate that activation of the mechanosensitive cation channel Piezo1 in a human epithelial cell line (H441) and in primary human lung epithelial cells induces the proteolytic activity of the metalloproteinases ADAM10 and ADAM17 at the plasma membrane. These ADAMs are known to convert cell surface expressed proteins into soluble and thereby play major roles in proliferation, barrier regulation and inflammation. We observed that chemical activation of Piezo1 promotes cleavage of substrates that are specific for either ADAM10 or ADAM17. Activation of Piezo1 also induced the synthesis and ADAM10/17-dependent release of the growth factor amphiregulin (AREG). In addition, junctional adhesion molecule A (JAM-A) was shed in an ADAM10/17-dependent manner resulting in a reduction of cell contacts. Stretching experiments combined with Piezo1 knockdown further demonstrated that mechanical activation promotes shedding via Piezo1. Most importantly, high pressure ventilation of murine lungs increased AREG and JAM-A release into the alveolar space, which was reduced by a Piezo1 inhibitor. Our study provides a novel link between stretch-induced Piezo1 activation and the activation of ADAM10 and ADAM17 in lung epithelium. This may help to understand acute respiratory distress syndrome (ARDS) which is induced by ventilation stress and goes along with perturbed epithelial permeability and release of growth factors.
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Affiliation(s)
- Caroline Grannemann
- Institute of Molecular Pharmacology, RWTH Aachen University, Aachen, Germany
| | - Alessa Pabst
- Institute of Molecular Pharmacology, RWTH Aachen University, Aachen, Germany
| | - Annika Honert
- Institute of Molecular Pharmacology, RWTH Aachen University, Aachen, Germany
| | - Jana Schieren
- Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany
| | - Christian Martin
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | - Sophia Hank
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | - Svenja Böll
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | - Katharina Bläsius
- Institute of Molecular Pharmacology, RWTH Aachen University, Aachen, Germany
| | - Stefan Düsterhöft
- Institute of Molecular Pharmacology, RWTH Aachen University, Aachen, Germany
| | - Holger Jahr
- Institute of Anatomy and Cell Biology, RWTH Aachen University, Aachen, Germany
| | - Rudolf Merkel
- Institute of Biological Information Processing 2, Mechanobiology, Research Centre Juelich, Juelich, Germany
| | - Rudolf Leube
- Institute of Molecular and Cellular Anatomy, RWTH Aachen University, Aachen, Germany
| | - Aaron Babendreyer
- Institute of Molecular Pharmacology, RWTH Aachen University, Aachen, Germany.
| | - Andreas Ludwig
- Institute of Molecular Pharmacology, RWTH Aachen University, Aachen, Germany
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Kim JH, Schaible N, Hall JK, Bartolák-Suki E, Deng Y, Herrmann J, Sonnenberg A, Behrsing HP, Lutchen KR, Krishnan R, Suki B. Multiscale stiffness of human emphysematous precision cut lung slices. SCIENCE ADVANCES 2023; 9:eadf2535. [PMID: 37205750 PMCID: PMC10198632 DOI: 10.1126/sciadv.adf2535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Accepted: 04/14/2023] [Indexed: 05/21/2023]
Abstract
Emphysema is a debilitating disease that remodels the lung leading to reduced tissue stiffness. Thus, understanding emphysema progression requires assessing lung stiffness at both the tissue and alveolar scales. Here, we introduce an approach to determine multiscale tissue stiffness and apply it to precision-cut lung slices (PCLS). First, we established a framework for measuring stiffness of thin, disk-like samples. We then designed a device to verify this concept and validated its measuring capabilities using known samples. Next, we compared healthy and emphysematous human PCLS and found that the latter was 50% softer. Through computational network modeling, we discovered that this reduced macroscopic tissue stiffness was due to both microscopic septal wall remodeling and structural deterioration. Lastly, through protein expression profiling, we identified a wide spectrum of enzymes that can drive septal wall remodeling, which, together with mechanical forces, lead to rupture and structural deterioration of the emphysematous lung parenchyma.
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Affiliation(s)
- Jae Hun Kim
- Department of Biomedical Engineering, Boston University, Boston, MA, USA
- Mechanobiologix, LLC, Newton, MA, USA
| | - Niccole Schaible
- Mechanobiologix, LLC, Newton, MA, USA
- Center for Vascular Biology Research, Department of Emergency Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Joseph K. Hall
- Department of Biomedical Engineering, Boston University, Boston, MA, USA
| | | | - Yuqing Deng
- Department of Mechanical Engineering, Boston University, Boston, MA, USA
| | - Jacob Herrmann
- Department of Biomedical Engineering, Boston University, Boston, MA, USA
- University of Iowa, Iowa City, IA, USA
| | - Adam Sonnenberg
- Department of Biomedical Engineering, Boston University, Boston, MA, USA
| | | | - Kenneth R. Lutchen
- Department of Biomedical Engineering, Boston University, Boston, MA, USA
| | - Ramaswamy Krishnan
- Mechanobiologix, LLC, Newton, MA, USA
- Center for Vascular Biology Research, Department of Emergency Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Béla Suki
- Department of Biomedical Engineering, Boston University, Boston, MA, USA
- Mechanobiologix, LLC, Newton, MA, USA
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5
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Lam M, Lamanna E, Organ L, Donovan C, Bourke JE. Perspectives on precision cut lung slices-powerful tools for investigation of mechanisms and therapeutic targets in lung diseases. Front Pharmacol 2023; 14:1162889. [PMID: 37261291 PMCID: PMC10228656 DOI: 10.3389/fphar.2023.1162889] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/19/2023] [Indexed: 06/02/2023] Open
Abstract
Precision cut lung slices (PCLS) have emerged as powerful experimental tools for respiratory research. Pioneering studies using mouse PCLS to visualize intrapulmonary airway contractility have been extended to pulmonary arteries and for assessment of novel bronchodilators and vasodilators as therapeutics. Additional disease-relevant outcomes, including inflammatory, fibrotic, and regenerative responses, are now routinely measured in PCLS from multiple species, including humans. This review provides an overview of established and innovative uses of PCLS as an intermediary between cellular and organ-based studies and focuses on opportunities to increase their application to investigate mechanisms and therapeutic targets to oppose excessive airway contraction and fibrosis in lung diseases.
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Affiliation(s)
- Maggie Lam
- Department of Pharmacology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, VIC, Australia
- Department of Molecular and Translational Sciences, Monash University, Clayton, VIC, Australia
| | - Emma Lamanna
- Department of Pharmacology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
- Institut Pasteur, Unit of Antibodies in Therapy and Pathology, INSERM UMR1222, Paris, France
| | - Louise Organ
- Department of Pharmacology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| | - Chantal Donovan
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW, Australia
- Hunter Medical Research Institute and The University of Newcastle, Newcastle, NSW, Australia
| | - Jane E. Bourke
- Department of Pharmacology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton, VIC, Australia
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6
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Nußbaum SM, Krabbe J, Böll S, Babendreyer A, Martin C. Functional changes in long-term incubated rat precision-cut lung slices. Respir Res 2022; 23:261. [PMID: 36127699 PMCID: PMC9490993 DOI: 10.1186/s12931-022-02169-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 09/02/2022] [Indexed: 11/10/2022] Open
Abstract
Background Respiratory diseases represent a global health burden. Because research on therapeutic strategies of airway diseases is essential, the technique of precision-cut lung slices (PCLS) has been developed and widely studied. PCLS are an alternative ex vivo model and have the potential to replace and reduce in vivo animal models. So far, the majority of studies was conducted with short-term cultivated PCLS (≤ 72 h). As there is large interest in research of chronic diseases and chronic toxicity, feasibility of cultivating human PCLS long-term over 2 weeks and recently over 4 weeks was investigated by another research group with successful results. Our aim was to establish a model of long-term cultivated rat PCLS over a period of 29 days. Methods Rat PCLS were cultured for 29 days and analysed regarding viability, histopathology, reactivity and gene expression at different time points during cultivation. Results Cultivation of rat PCLS over a 29-day time period was successful with sustained viability. Furthermore, the ability of bronchoconstriction was maintained between 13 and 25 days, depending on the mediator. However, reduced relaxation, altered sensitivity and increased respiratory tone were observed. Regarding transcription, alteration in gene expression pattern of the investigated target genes was ascertained during long-term cultivation with mixed results. Furthermore, the preparation of PCLS seems to influence messenger ribonucleic acid (mRNA) expression of most target genes. Moreover, the addition of fetal bovine serum (FBS) to the culture medium did not improve viability of PCLS. In contrast to medium without FBS, FBS seems to affect measurements and resulted in marked cellular changes of metaplastic and/or regenerative origin. Conclusions Overall, a model of long-term cultivated rat PCLS which stays viable for 29 days and reactive for at least 13 days could be established. Before long-term cultivated PCLS can be used for in-depth study of chronic diseases and chronic toxicity, further investigations have to be made. Supplementary Information The online version contains supplementary material available at 10.1186/s12931-022-02169-5.
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Affiliation(s)
- Sarah Marie Nußbaum
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Julia Krabbe
- Institute of Occupational, Social and Environmental Medicine, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Svenja Böll
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, University Hospital Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Aaron Babendreyer
- Institute of Molecular Pharmacology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Christian Martin
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany.
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7
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Koziol-White C. Human Precision-Cut Lung Slices: Generation of and Measurement of Contractility and Relaxation of Small Airways. Methods Mol Biol 2022; 2506:111-117. [PMID: 35771467 DOI: 10.1007/978-1-0716-2364-0_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Lung slices have been used since the mid-1990's to study various aspects of lung biology that include, but are not limited to, mechanisms of airway contraction and relaxation; the pulmonary immune response in the context of inflammatory diseases of the lung like asthma and chronic obstructive pulmonary disease; mast cell-mediated airway contractility and inflammation; modulation of airway cells following pathogen exposure; and consequences of environmental toxicant exposure. Here we describe the generation of human precision-cut lung slices (hPCLS) and measurement of contraction and relaxation of small airways within the slices.
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8
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O'Sullivan MJ, Phung TKN, Park JA. Bronchoconstriction: a potential missing link in airway remodelling. Open Biol 2020; 10:200254. [PMID: 33259745 PMCID: PMC7776576 DOI: 10.1098/rsob.200254] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 11/10/2020] [Indexed: 02/06/2023] Open
Abstract
In asthma, progressive structural changes of the airway wall are collectively termed airway remodelling. Despite its deleterious effect on lung function, airway remodelling is incompletely understood. As one of the important causes leading to airway remodelling, here we discuss the significance of mechanical forces that are produced in the narrowed airway during asthma exacerbation, as a driving force of airway remodelling. We cover in vitro, ex vivo and in vivo work in this field, and discuss up-to-date literature supporting the idea that bronchoconstriction may be the missing link in a comprehensive understanding of airway remodelling in asthma.
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Affiliation(s)
| | | | - Jin-Ah Park
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, 665 Huntington Ave, Boston, MA, USA
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9
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Veerati PC, Mitchel JA, Reid AT, Knight DA, Bartlett NW, Park JA, Grainge CL. Airway mechanical compression: its role in asthma pathogenesis and progression. Eur Respir Rev 2020; 29:190123. [PMID: 32759373 PMCID: PMC8008491 DOI: 10.1183/16000617.0123-2019] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 01/30/2020] [Indexed: 12/22/2022] Open
Abstract
The lung is a mechanically active organ, but uncontrolled or excessive mechanical forces disrupt normal lung function and can contribute to the development of disease. In asthma, bronchoconstriction leads to airway narrowing and airway wall buckling. A growing body of evidence suggests that pathological mechanical forces induced by airway buckling alone can perpetuate disease processes in asthma. Here, we review the data obtained from a variety of experimental models, including in vitro, ex vivo and in vivo approaches, which have been used to study the impact of mechanical forces in asthma pathogenesis. We review the evidence showing that mechanical compression alters the biological and biophysical properties of the airway epithelium, including activation of the epidermal growth factor receptor pathway, overproduction of asthma-associated mediators, goblet cell hyperplasia, and a phase transition of epithelium from a static jammed phase to a mobile unjammed phase. We also define questions regarding the impact of mechanical forces on the pathology of asthma, with a focus on known triggers of asthma exacerbations such as viral infection.
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Affiliation(s)
- Punnam Chander Veerati
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, Australia
| | - Jennifer A Mitchel
- Molecular and Integrative Physiological Sciences Program, Dept of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Andrew T Reid
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, Australia
| | - Darryl A Knight
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, Australia
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, Australia
- Dept of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, Canada
- Research and Academic Affairs, Providence Health Care Research Institute, Vancouver, Canada
| | - Nathan W Bartlett
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, Australia
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, Australia
| | - Jin-Ah Park
- Molecular and Integrative Physiological Sciences Program, Dept of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Chris L Grainge
- School of Medicine and Public Health, University of Newcastle, Callaghan, Australia
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, Australia
- Dept of Respiratory and Sleep Medicine, John Hunter Hospital, Newcastle, Australia
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10
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Klouda T, Condon D, Hao Y, Tian W, Lvova M, Chakraborty A, Nicolls MR, Zhou X, Raby BA, Yuan K. From 2D to 3D: Promising Advances in Imaging Lung Structure. Front Med (Lausanne) 2020; 7:343. [PMID: 32766264 PMCID: PMC7381109 DOI: 10.3389/fmed.2020.00343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 06/09/2020] [Indexed: 11/13/2022] Open
Abstract
The delicate structure of murine lungs poses many challenges for acquiring high-quality images that truly represent the living lung. Here, we describe several optimized procedures for obtaining and imaging murine lung tissue. Compared to traditional paraffin cross-section and optimal cutting temperature (OCT), agarose-inflated vibratome sections (aka precision-cut lung slices), combines comparable structural preservation with experimental flexibility. In particular, we discuss an optimized procedure to precision-cut lung slices that can be used to visualize three-dimensional cell-cell interactions beyond the limitations of two-dimensional imaging. Super-resolution microscopy can then be used to reveal the fine structure of lung tissue's cellular bodies and processes that regular confocal cannot. Lastly, we evaluate the entire lung vasculature with clearing technology that allows imaging of the entire volume of the lung without sectioning. In this manuscript, we combine the above procedures to create a novel and evolutionary method to study cell behavior ex vivo, trace and reconstruct pulmonary vasculature, address fundamental questions relevant to a wide variety of vascular disorders, and perceive implications to better imaging clinical tissue.
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Affiliation(s)
- Timothy Klouda
- Divisions of Pulmonary Medicine, Boston Children's Hospital, Boston, MA, United States
| | - David Condon
- Division of Pulmonary, Allery and Critical Care Medicine, Stanford University, Stanford, CA, United States
| | - Yuan Hao
- Divisions of Pulmonary Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Wen Tian
- Division of Pulmonary, Allery and Critical Care Medicine, Stanford University, Stanford, CA, United States
- VA Palo Alto Health Care System, Department of Medicine, Stanford University, Stanford, CA, United States
| | - Maria Lvova
- Divisions of Pulmonary Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Ananya Chakraborty
- Division of Pulmonary, Allery and Critical Care Medicine, Stanford University, Stanford, CA, United States
| | - Mark R. Nicolls
- Division of Pulmonary, Allery and Critical Care Medicine, Stanford University, Stanford, CA, United States
- VA Palo Alto Health Care System, Department of Medicine, Stanford University, Stanford, CA, United States
| | - Xiaobo Zhou
- Division of Pulmonary and Critical Care Medicine, Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Benjamin A. Raby
- Divisions of Pulmonary Medicine, Boston Children's Hospital, Boston, MA, United States
- Division of Pulmonary and Critical Care Medicine, Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Ke Yuan
- Divisions of Pulmonary Medicine, Boston Children's Hospital, Boston, MA, United States
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11
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Danov O, Lasswitz L, Obernolte H, Hesse C, Braun A, Wronski S, Sewald K. Rupintrivir reduces RV-induced T H-2 cytokine IL-4 in precision-cut lung slices (PCLS) of HDM-sensitized mice ex vivo. Respir Res 2019; 20:228. [PMID: 31640701 PMCID: PMC6805592 DOI: 10.1186/s12931-019-1175-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 08/28/2019] [Indexed: 12/11/2022] Open
Abstract
Background Antiviral drugs such as rupintrivir may have an immune-modulatory effect in experimentally induced allergic asthma with subsequent RV infection. We infected lung slices of house-dust mite (HDM)-sensitized asthmatic mice ex vivo with human rhinovirus (RV) and investigated the effect of the antiviral drug rupintrivir on RV-induced cytokine response in lung tissue of HDM-sensitized mice ex vivo. Methods Mice were sensitized with HDM. Precision-cut lung slices (PCLS) were prepared from HDM-sensitized or non-sensitized mice. Lung slices were infected ex vivo with RV or RV together with rupintrivir. Modulation of immune responses was evaluated by cytokine secretion 48 h post infection. Results In vivo HDM sensitization resulted in a TH-2/TH-17-dominated cytokine response that persisted in PCLS ex vivo. RV infection of PCLS from non-sensitized mice resulted in the induction of an antiviral and pro-inflammatory immune response, as indicated by the secretion of IFN-α, IFN-β, IFN-γ, TNF-α, MCP-1, IP-10, IL-10, and IL-17A. In contrast, PCLS from HDM-sensitized mice showed an attenuated antiviral response, but exaggerated IL-4, IL-6, and IL-10 secretion upon infection. Rupintrivir inhibited exaggerated pro-inflammatory cytokine IL-6 and TH-2 cytokine IL-4 in HDM-sensitized mice. Conclusions In summary, this study demonstrates that treatment with rupintrivir influences virus-induced IL-4 and IL-6 cytokine release under experimental conditions ex vivo. Electronic supplementary material The online version of this article (10.1186/s12931-019-1175-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Olga Danov
- Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Nikolai-Fuchs-Strasse 1, 30625, Hannover, Germany
| | - Lisa Lasswitz
- Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Nikolai-Fuchs-Strasse 1, 30625, Hannover, Germany
| | - Helena Obernolte
- Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Nikolai-Fuchs-Strasse 1, 30625, Hannover, Germany
| | - Christina Hesse
- Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Nikolai-Fuchs-Strasse 1, 30625, Hannover, Germany
| | - Armin Braun
- Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Nikolai-Fuchs-Strasse 1, 30625, Hannover, Germany.,Institute of Immunology, Hannover Medical School, Carl-Neuberg Strasse 1, 30625, Hannover, Germany
| | - Sabine Wronski
- Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Nikolai-Fuchs-Strasse 1, 30625, Hannover, Germany
| | - Katherina Sewald
- Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Member of Fraunhofer International Consortium for Anti-Infective Research (iCAIR), Nikolai-Fuchs-Strasse 1, 30625, Hannover, Germany.
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12
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Wu X, van Dijk EM, Bos IST, Kistemaker LEM, Gosens R. Mouse Lung Tissue Slice Culture. Methods Mol Biol 2019; 1940:297-311. [PMID: 30788834 DOI: 10.1007/978-1-4939-9086-3_21] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Precision-cut lung slices (PCLS) represent an ex vivo model widely used in visualizing interactions between lung structure and function. The major advantage of this technique is that the presence, differentiation state, and localization of the more than 40 cell types that make up the lung are in accordance with the physiological situation found in lung tissue, including the right localization and patterning of extracellular matrix elements. Here we describe the methodology involved in preparing and culturing PCLS followed by detailed practical information about their possible applications.
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Affiliation(s)
- Xinhui Wu
- Faculty of Science and Engineering, Department of Molecular Pharmacology, University of Groningen, Groningen, The Netherlands.,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Eline M van Dijk
- Faculty of Science and Engineering, Department of Molecular Pharmacology, University of Groningen, Groningen, The Netherlands.,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - I Sophie T Bos
- Faculty of Science and Engineering, Department of Molecular Pharmacology, University of Groningen, Groningen, The Netherlands.,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Loes E M Kistemaker
- Faculty of Science and Engineering, Department of Molecular Pharmacology, University of Groningen, Groningen, The Netherlands.,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Reinoud Gosens
- Faculty of Science and Engineering, Department of Molecular Pharmacology, University of Groningen, Groningen, The Netherlands. .,Groningen Research Institute for Asthma and COPD, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
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13
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Rieg AD, Bünting NA, Cranen C, Suleiman S, Spillner JW, Schnöring H, Schröder T, von Stillfried S, Braunschweig T, Manley PW, Schälte G, Rossaint R, Uhlig S, Martin C. Tyrosine kinase inhibitors relax pulmonary arteries in human and murine precision-cut lung slices. Respir Res 2019; 20:111. [PMID: 31170998 PMCID: PMC6555704 DOI: 10.1186/s12931-019-1074-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 05/16/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Tyrosine kinase inhibitors (TKIs) inhibit the platelet derived growth factor receptor (PDGFR) and gain increasing significance in the therapy of proliferative diseases, e.g. pulmonary arterial hypertension (PAH). Moreover, TKIs relax pulmonary vessels of rats and guinea pigs. So far, it is unknown, whether TKIs exert relaxation in human and murine pulmonary vessels. Thus, we studied the effects of TKIs and the PDGFR-agonist PDGF-BB in precision-cut lung slices (PCLS) from both species. METHODS The vascular effects of imatinib (mice/human) or nilotinib (human) were studied in Endothelin-1 (ET-1) pre-constricted pulmonary arteries (PAs) or veins (PVs) by videomicroscopy. Baseline initial vessel area (IVA) was defined as 100%. With regard to TKI-induced relaxation, K+-channel activation was studied in human PAs (PCLS) and imatinib/nilotinib-related changes of cAMP and cGMP were analysed in human PAs/PVs (ELISA). Finally, the contractile potency of PDGF-BB was explored in PCLS (mice/human). RESULTS Murine PCLS: Imatinib (10 μM) relaxed ET-1-pre-constricted PAs to 167% of IVA. Vice versa, 100 nM PDGF-BB contracted PAs to 60% of IVA and pre-treatment with imatinib or amlodipine prevented PDGF-BB-induced contraction. Murine PVs reacted only slightly to imatinib or PDGF-BB. Human PCLS: 100 μM imatinib or nilotinib relaxed ET-1-pre-constricted PAs to 166% or 145% of IVA, respectively, due to the activation of KATP-, BKCa2+- or Kv-channels. In PVs, imatinib exerted only slight relaxation and nilotinib had no effect. Imatinib and nilotinib increased cAMP in human PAs, but not in PVs. In addition, PDGF-BB contracted human PAs/PVs, which was prevented by imatinib. CONCLUSIONS TKIs relax pre-constricted PAs/PVs from both, mice and humans. In human PAs, the activation of K+-channels and the generation of cAMP are relevant for TKI-induced relaxation. Vice versa, PDGF-BB contracts PAs/PVs (human/mice) due to PDGFR. In murine PAs, PDGF-BB-induced contraction depends on intracellular calcium. So, PDGFR regulates the tone of PAs/PVs. Since TKIs combine relaxant and antiproliferative effects, they may be promising in therapy of PAH.
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Affiliation(s)
- Annette D Rieg
- Department of Anaesthesiology, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany.
| | - Nina A Bünting
- Institute of Pharmacology and Toxicology, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
| | - Christian Cranen
- Institute of Pharmacology and Toxicology, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
| | - Said Suleiman
- Institute of Pharmacology and Toxicology, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
| | - Jan W Spillner
- Department of Cardiac and Thoracic Surgery, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
| | - Heike Schnöring
- Department of Cardiac and Thoracic Surgery, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
| | - Thomas Schröder
- Department of Surgery, Luisenhospital Aachen, Aachen, Germany
| | | | - Till Braunschweig
- Institute of Pathology, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
| | | | - Gereon Schälte
- Department of Anaesthesiology, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
| | - Rolf Rossaint
- Department of Anaesthesiology, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
| | - Stefan Uhlig
- Institute of Pharmacology and Toxicology, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
| | - Christian Martin
- Institute of Pharmacology and Toxicology, Medical Faculty Aachen, RWTH-Aachen, Aachen, Germany
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14
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P2X7 Receptor Indirectly Regulates the JAM-A Protein Content via Modulation of GSK-3β. Int J Mol Sci 2019; 20:ijms20092298. [PMID: 31075901 PMCID: PMC6539570 DOI: 10.3390/ijms20092298] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/30/2019] [Accepted: 05/08/2019] [Indexed: 12/20/2022] Open
Abstract
The alveolar epithelial cells represent an important part of the alveolar barrier, which is maintained by tight junction proteins, particularly JAM-A, occludin, and claudin-18, which regulate paracellular permeability. In this study, we report on a strong increase in epithelial JAM-A expression in P2X7 receptor knockout mice when compared to the wildtype. Precision-cut lung slices of wildtype and knockout lungs and immortal epithelial lung E10 cells were treated with bleomycin, the P2X7 receptor inhibitor oxATP, and the agonist BzATP, respectively, to evaluate early changes in JAM-A expression. Biochemical and immunohistochemical data showed evidence for P2X7 receptor-dependent JAM-A expression in vitro. Inhibition of the P2X7 receptor using oxATP increased JAM-A, whereas activation of the receptor decreased the JAM-A protein level. In order to examine the role of GSK-3β in the expression of JAM-A in alveolar epithelial cells, we used lithium chloride for GSK-3β inhibiting experiments, which showed a modulating effect on bleomycin-induced alterations in JAM-A levels. Our data suggest that an increased constitutive JAM-A protein level in P2X7 receptor knockout mice may have a protective effect against bleomycin-induced lung injury. Bleomycin-treated precision-cut lung slices from P2X7 receptor knockout mice responded with a lower increase in mRNA expression of JAM-A than bleomycin-treated precision-cut lung slices from wildtype mice.
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15
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Krabbe J, Ruske N, Kanzler S, Reiss LK, Ludwig A, Uhlig S, Martin C. Retrograde perfusion in isolated perfused mouse lungs-Feasibility and effects on cytokine levels and pulmonary oedema formation. Basic Clin Pharmacol Toxicol 2019; 125:279-288. [PMID: 30925204 DOI: 10.1111/bcpt.13236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 03/22/2019] [Indexed: 01/20/2023]
Abstract
Retrograde lung vascular perfusion can appear in high-risk surgeries. The present report is the first to study long-term retrograde perfusion of isolated perfused mouse lungs (IPLs) and to use the tyrosine kinase ephB4 and its ligand ephrinB2 as potential markers for acute lung injury. Mouse lungs were subjected to anterograde or retrograde perfusion with normal-pressure ventilation (NV) or high-pressure ventilation (=overventilation, OV) for 4 hours. Outcome parameters were cytokine, ephrinB2 and ephB4 levels in perfusate samples and bronchoalveolar lavage (BAL), and the wet-to-dry ratio. Anterograde perfusion was feasible for 4 hours, while lungs receiving retrograde perfusion presented considerable collapse rates. Retrograde perfusion resulted in an increased wet-to-dry ratio when combined with high-pressure ventilation; other physiological parameters were not affected. Cytokine levels in BAL and perfusate, as well as levels of soluble ephB4 in BAL were increased in OV, while soluble ephrinB2 BAL levels were increased in retrograde perfusion. BAL levels of ephrinB2 and ephB4 were also determined in vivo, including mice ventilated for 7 hours with normal-volume ventilation (NVV) or high-volume ventilation (HVV) with increased levels of ephB4 in HVV BAL compared to NVV. Retrograde perfusion in IPL is limited as a routine method to investigate effects due to collapse for yet unclear reasons. If successful, retrograde perfusion has an influence on pulmonary oedema formation. In BAL, ephrinB2 seems to be up-regulated by flow reversal, while ephB4 is a marker for acute lung injury.
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Affiliation(s)
- Julia Krabbe
- Medical Faculty, Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany.,Medical Faculty, Institute of Occupational, Social and Environmental Medicine, RWTH Aachen University, Aachen, Germany
| | - Nadine Ruske
- Medical Faculty, Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | - Stephanie Kanzler
- Medical Faculty, Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | - Lucy Kathleen Reiss
- Medical Faculty, Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | - Andreas Ludwig
- Medical Faculty, Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | - Stefan Uhlig
- Medical Faculty, Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | - Christian Martin
- Medical Faculty, Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
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16
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Human lung tissue provides highly relevant data about efficacy of new anti-asthmatic drugs. PLoS One 2018; 13:e0207767. [PMID: 30500834 PMCID: PMC6267969 DOI: 10.1371/journal.pone.0207767] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 11/06/2018] [Indexed: 12/11/2022] Open
Abstract
Subgroups of patients with severe asthma are insensitive to inhaled corticosteroids and require novel therapies on top of standard medical care. IL-13 is considered one of the key cytokines in the asthma pathogenesis, however, the effect of IL-13 was mostly studied in rodents. This study aimed to assess IL-13 effect in human lung tissue for the development of targeted therapy approaches such as inhibition of soluble IL-13 or its receptor IL-4Rα subunit. Precision-cut lung slices (PCLS) were prepared from lungs of rodents, non-human primates (NHP) and humans. Direct effect of IL-13 on human lung tissue was observed on inflammation, induction of mucin5AC, and airway constriction induced by methacholine and visualized by videomicroscopy. Anti-inflammatory treatment was evaluated by co-incubation of IL-13 with increasing concentrations of IL-13/IL-13 receptor inhibitors. IL-13 induced a two-fold increase in mucin5AC secretion in human bronchial tissue. Additionally, IL-13 induced release of proinflammatory cytokines eotaxin-3 and TARC in human PCLS. Anti-inflammatory treatment with four different inhibitors acting either on the IL-13 ligand itself (anti-IL-13 antibody, similar to Lebrikizumab) or the IL-4Rα chain of the IL-13/IL-4 receptor complex (anti-IL-4Rα #1, similar to AMG 317, and #2, similar to REGN668) and #3 PRS-060 (a novel anticalin directed against this receptor) could significantly attenuate IL-13 induced inflammation. Contrary to this, IL-13 did not induce airway hyperresponsiveness (AHR) in human and NHP PCLS, although it was effective in rodent PCLS. Overall, this study demonstrates that IL-13 stimulation induces production of mucus and biomarkers of allergic inflammation in human lung tissue ex-vivo but no airway hyperresponsiveness. The results of this study show a more distinct efficacy than known from animals models and a clear discrepancy in AHR induction. Moreover, it allows a translational approach in inhibitor profiling in human lung tissue.
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17
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Rosales Gerpe MC, van Vloten JP, Santry LA, de Jong J, Mould RC, Pelin A, Bell JC, Bridle BW, Wootton SK. Use of Precision-Cut Lung Slices as an Ex Vivo Tool for Evaluating Viruses and Viral Vectors for Gene and Oncolytic Therapy. Mol Ther Methods Clin Dev 2018; 10:245-256. [PMID: 30112421 PMCID: PMC6092314 DOI: 10.1016/j.omtm.2018.07.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Accepted: 07/26/2018] [Indexed: 12/31/2022]
Abstract
Organotypic slice cultures recapitulate many features of an intact organ, including cellular architecture, microenvironment, and polarity, making them an ideal tool for the ex vivo study of viruses and viral vectors. Here, we describe a procedure for generating precision-cut ovine and murine tissue slices from agarose-perfused normal and murine melanoma tumor-bearing lungs. Furthermore, we demonstrate that these precision-cut lung slices can be maintained up to 1 month and can be used for a range of applications, which include characterizing the tissue tropism of viruses that cannot be propagated in cell monolayers, evaluating the transducing properties of gene therapy vectors, and, finally, investigating the tumor specificity of oncolytic viruses. Our results suggest that ex vivo lung slices are an ideal platform for studying the tissue specificity and cancer cell selectivity of gene therapy vectors and oncolytic viruses prior to in vivo studies, providing justification for pre-clinical work.
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Affiliation(s)
| | - Jacob P. van Vloten
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Lisa A. Santry
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Jondavid de Jong
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Robert C. Mould
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Adrian Pelin
- Ottawa Hospital Research Institute, Centre for Innovative Cancer Research, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - John C. Bell
- Ottawa Hospital Research Institute, Centre for Innovative Cancer Research, Ottawa, ON K1H 8L6, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Byram W. Bridle
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Sarah K. Wootton
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
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18
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Krabbe J, Esser A, Kanzler S, Braunschweig T, Kintsler S, Spillner J, Schröder T, Kalverkamp S, Balakirski G, Gerhards B, Rieg AD, Kraus T, Brand P, Martin C. The effects of zinc- and copper-containing welding fumes on murine, rat and human precision-cut lung slices. J Trace Elem Med Biol 2018; 49:192-201. [PMID: 29551464 DOI: 10.1016/j.jtemb.2018.03.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/07/2018] [Accepted: 03/08/2018] [Indexed: 01/14/2023]
Abstract
Recently, the pro-inflammatory effects of metal inert gas brazing welding fumes containing zinc and copper have been demonstrated in humans. Here, murine, rat and human precision cut lung slices (PCLS) were incubated in welding fume containing media with 0.1, 1, 10 and 100 μg/ml for 24 or 48 h. 24 h incubation were determined either by incubation for the total time or for only 6 h followed by a 18 h post-incubation phase. Cytotoxicity, proliferation and DNA repair rates, and cytokine levels were determined. Welding fume particle concentrations of 0.1 and 1 μg/ml showed no toxic effects on PCLS of all three species, while for 10 and 100 μg/ml a concentration-dependent toxicity occurred. Proliferation and DNA repair rates were reduced for all tested concentrations and incubation times. Additionally, the cytokine levels in the supernatants were markedly reduced, while after 6 h of exposure with 18 h of post-incubation time a trend towards increased cytokine levels occurred. PCLS are a reliable and feasible method to assess and offer a prediction of toxic effects of welding fume particles on human lungs. Rat PCLS showed similar responses compared to human PCLS and are suitable for further evaluation of toxic effects exerted by welding fume particles.
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Affiliation(s)
- Julia Krabbe
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074 Aachen, Germany; Institute of Occupational, Social and Environmental Medicine, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany.
| | - André Esser
- Institute of Occupational, Social and Environmental Medicine, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Stephanie Kanzler
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074 Aachen, Germany
| | - Till Braunschweig
- Institute of Pathology, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Svetlana Kintsler
- Institute of Pathology, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Jan Spillner
- Departement of Thoracic and Cardiovascular Surgery, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Thomas Schröder
- Department of Surgery, Luisenhospital Aachen, Boxgraben 99, 52064 Aachen, Germany
| | - Sebastian Kalverkamp
- Departement of Thoracic and Cardiovascular Surgery, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Galina Balakirski
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074 Aachen, Germany; Departement of Dermatology and Allergology, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Benjamin Gerhards
- ISF- Welding and Joining Institute, RWTH Aachen University, Pontstraße 49, 52062 Aachen, Germany
| | - Annette D Rieg
- Department of Anaesthesiology, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Thomas Kraus
- Institute of Occupational, Social and Environmental Medicine, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Peter Brand
- Institute of Occupational, Social and Environmental Medicine, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074 Aachen, Germany
| | - Christian Martin
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074 Aachen, Germany
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Rieg AD, Suleiman S, Anker C, Verjans E, Rossaint R, Uhlig S, Martin C. PDGF-BB regulates the pulmonary vascular tone: impact of prostaglandins, calcium, MAPK- and PI3K/AKT/mTOR signalling and actin polymerisation in pulmonary veins of guinea pigs. Respir Res 2018; 19:120. [PMID: 29921306 PMCID: PMC6009037 DOI: 10.1186/s12931-018-0829-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 06/13/2018] [Indexed: 12/15/2022] Open
Abstract
Background Platelet-derived growth factor (PDGF)-BB and its receptor PDGFR are highly expressed in pulmonary hypertension (PH) and mediate proliferation. Recently, we showed that PDGF-BB contracts pulmonary veins (PVs) and that this contraction is prevented by inhibition of PDGFR-β (imatinib/SU6668). Here, we studied PDGF-BB-induced contraction and downstream-signalling in isolated perfused lungs (IPL) and precision-cut lung slices (PCLS) of guinea pigs (GPs). Methods In IPLs, PDGF-BB was perfused after or without pre-treatment with imatinib (perfused/nebulised), the effects on the pulmonary arterial pressure (PPA), the left atrial pressure (PLA) and the capillary pressure (Pcap) were studied and the precapillary (Rpre) and postcapillary resistance (Rpost) were calculated. Perfusate samples were analysed (ELISA) to detect the PDGF-BB-induced release of prostaglandin metabolites (TXA2/PGI2). In PCLS, the contractile effect of PDGF-BB was evaluated in pulmonary arteries (PAs) and PVs. In PVs, PDGF-BB-induced contraction was studied after inhibition of PDGFR-α/β, L-Type Ca2+-channels, ROCK/PKC, prostaglandin receptors, MAP2K, p38-MAPK, PI3K-α/γ, AKT/PKB, actin polymerisation, adenyl cyclase and NO. Changes of the vascular tone were measured by videomicroscopy. In PVs, intracellular cAMP was measured by ELISA. Results In IPLs, PDGF-BB increased PPA, Pcap and Rpost. In contrast, PDGF-BB had no effect if lungs were pre-treated with imatinib (perfused/nebulised). In PCLS, PDGF-BB significantly contracted PVs/PAs which was blocked by the PDGFR-β antagonist SU6668. In PVs, inhibition of actin polymerisation and inhibition of L-Type Ca2+-channels reduced PDGF-BB-induced contraction, whereas inhibition of ROCK/PKC had no effect. Blocking of EP1/3- and TP-receptors or inhibition of MAP2K-, p38-MAPK-, PI3K-α/γ- and AKT/PKB-signalling prevented PDGF-BB-induced contraction, whereas inhibition of EP4 only slightly reduced it. Accordingly, PDGF-BB increased TXA2 in the perfusate, whereas PGI2 was increased in all groups after 120 min and inhibition of IP-receptors did not enhance PDGF-BB-induced contraction. Moreover, PDGF-BB increased cAMP in PVs and inhibition of adenyl cyclase enhanced PDGF-BB-induced contraction, whereas inhibition of NO-formation only slightly increased it. Conclusions PDGF-BB/PDGFR regulates the pulmonary vascular tone by the generation of prostaglandins, the increase of calcium, the activation of MAPK- or PI3K/AKT/mTOR signalling and actin remodelling. More insights in PDGF-BB downstream-signalling may contribute to develop new therapeutics for PH.
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Affiliation(s)
- Annette D Rieg
- Department of Anaesthesiology, Medical Faculty RWTH-Aachen, Aachen, Germany.
| | - Said Suleiman
- Institute of Pharmacology and Toxicology, Medical Faculty RWTH-Aachen, Aachen, Germany
| | - Carolin Anker
- Institute of Pharmacology and Toxicology, Medical Faculty RWTH-Aachen, Aachen, Germany
| | - Eva Verjans
- Institute of Pharmacology and Toxicology, Medical Faculty RWTH-Aachen, Aachen, Germany
| | - Rolf Rossaint
- Department of Anaesthesiology, Medical Faculty RWTH-Aachen, Aachen, Germany
| | - Stefan Uhlig
- Institute of Pharmacology and Toxicology, Medical Faculty RWTH-Aachen, Aachen, Germany
| | - Christian Martin
- Institute of Pharmacology and Toxicology, Medical Faculty RWTH-Aachen, Aachen, Germany
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20
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Debelleix S, Siao-Him Fa V, Begueret H, Berger P, Kamaev A, Ousova O, Marthan R, Fayon M. Montelukast reverses airway remodeling in actively sensitized young mice. Pediatr Pulmonol 2018; 53:701-709. [PMID: 29493871 DOI: 10.1002/ppul.23980] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 02/10/2018] [Indexed: 12/22/2022]
Abstract
UNLABELLED Asthma is characterized by airway hyperresponsiveness (AHR) and inflammation leading to airway remodeling (AR). In children, AR may occur very early prior to the age of 6 years. Treatments to prevent or reverse AR are unknown. AIM We sought to determine (i) whether short allergenic sensitization at a young age in a mouse model may induce enhanced AR and inflammation compared to adults; (ii) the effect of Montelukast on such AR. METHODS Immature and adult Balb/c mice were sensitized and challenged with ovalbumin. AHR and AR were measured using cultured precision-cut lung slices and inflammation by bronchoalveolar lavage. Experiments were repeated after administration of Montelukast. RESULTS OVA-challenged mice developed AHR to methacholine regardless of age of first exposure to OVA. Young mice developed greater thickened basement membrane, increased smooth muscle mass, and increased area of bronchovascular fibrosis compared with adult mice. Cellular infiltrates in BAL differed depending upon animal age at first exposure with higher eosinophilia measured in younger animals. Montelukast decreased ASM mass, BAL cellularity. CONCLUSION We provide thus evidence for a greater degree of AR after allergenic sensitization and challenge in younger mice versus adults. This study provides proof of concept that airway remodeling can be prevented and reversed in this case by anti-asthmatic drug Montelukast in this model.
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Affiliation(s)
- Stephane Debelleix
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,CHU de Bordeaux, Service de Pneumo-Pédiatrie, Service d'anatomopathologie, Service d'Explorations Fonctionnelles Respiratoires, Bordeaux, France
| | - Valérie Siao-Him Fa
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,CHU de Bordeaux, Service de Pneumo-Pédiatrie, Service d'anatomopathologie, Service d'Explorations Fonctionnelles Respiratoires, Bordeaux, France
| | - Hugues Begueret
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,CHU de Bordeaux, Service de Pneumo-Pédiatrie, Service d'anatomopathologie, Service d'Explorations Fonctionnelles Respiratoires, Bordeaux, France
| | - Patrick Berger
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,CHU de Bordeaux, Service de Pneumo-Pédiatrie, Service d'anatomopathologie, Service d'Explorations Fonctionnelles Respiratoires, Bordeaux, France
| | - Andy Kamaev
- Department of general practice, Pavlov First Saint-Petersburg State Medical University, St. Petersburg, Russia
| | - Olga Ousova
- Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,CHU de Bordeaux, Service de Pneumo-Pédiatrie, Service d'anatomopathologie, Service d'Explorations Fonctionnelles Respiratoires, Bordeaux, France
| | - Roger Marthan
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,CHU de Bordeaux, Service de Pneumo-Pédiatrie, Service d'anatomopathologie, Service d'Explorations Fonctionnelles Respiratoires, Bordeaux, France
| | - Michael Fayon
- Univ. Bordeaux, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,Inserm, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.,CHU de Bordeaux, Service de Pneumo-Pédiatrie, Service d'anatomopathologie, Service d'Explorations Fonctionnelles Respiratoires, Bordeaux, France
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21
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Krabbe J, Ruske N, Braunschweig T, Kintsler S, Spillner JW, Schröder T, Kalverkamp S, Kanzler S, Rieg AD, Uhlig S, Martin C. The effects of hydroxyethyl starch and gelatine on pulmonary cytokine production and oedema formation. Sci Rep 2018; 8:5123. [PMID: 29572534 PMCID: PMC5865122 DOI: 10.1038/s41598-018-23513-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 03/15/2018] [Indexed: 01/27/2023] Open
Abstract
Recently, side effects of plasma expanders like hydroxyethyl starch and gelatine gained considerable attention. Most studies have focused on the kidneys; lungs remain unconsidered. Isolated mouse lungs were perfused for 4 hours with buffer solutions based on hydroxyethyl starch (HES) 130/0.4, HES 200/0.5 or gelatine and ventilated with low or high pressure under physiological pH and alkalosis. Outcome parameters were cytokine levels and the wet-to-dry ratio. For cytokine release, murine and human PCLS were incubated in three different buffers and time points.In lungs perfused with the gelatine based buffer IL-6, MIP-2 and KC increased when ventilated with high pressure. Wet-to-dry ratios increased stronger in lungs perfused with gelatine - compared to HES 130/0.4. Alkalotic perfusion resulted in higher cytokine levels but normal wet-to-dry ratio. Murine PCLS supernatants showed increased IL-6 and KC when incubated in gelatine based buffer, whereas in human PCLS IL-8 was elevated. In murine IPL HES 130/0.4 has lung protective effects in comparison to gelatine based infusion solutions, especially in the presence of high-pressure ventilation. Gelatine perfusion resulted in increased cytokine production. Our findings suggest that gelatine based solutions may have side effects in patients with lung injury or lung oedema.
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Affiliation(s)
- Julia Krabbe
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany.
- Department of Anaesthesiology, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany.
- Department of Intensive Care and Intermediate Care, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany.
| | - Nadine Ruske
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Till Braunschweig
- Institute of Pathology, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Svetlana Kintsler
- Institute of Pathology, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Jan W Spillner
- Departement of Thoracic and Cardiovascular Surgery, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Thomas Schröder
- Department of Surgery, Luisenhospital Aachen, Boxgraben 99, 52064, Aachen, Germany
| | - Sebastian Kalverkamp
- Departement of Thoracic and Cardiovascular Surgery, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Stephanie Kanzler
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Annette D Rieg
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
- Department of Anaesthesiology, Medical Faculty, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany
| | - Stefan Uhlig
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
| | - Christian Martin
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Wendlingweg 2, 52074, Aachen, Germany
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22
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Löfdahl A, Wenglén C, Rydell-Törmänen K, Westergren-Thorsson G, Larsson-Callerfelt AK. Effects of 5-Hydroxytryptamine Class 2 Receptor Antagonists on Bronchoconstriction and Pulmonary Remodeling Processes. THE AMERICAN JOURNAL OF PATHOLOGY 2018; 188:1113-1119. [PMID: 29454752 DOI: 10.1016/j.ajpath.2018.01.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 01/02/2018] [Accepted: 01/18/2018] [Indexed: 12/11/2022]
Abstract
Serotonin [5-hydroxytryptamine (5-HT)] is associated with several chronic pulmonary diseases, recognizing 5-HT2 receptor antagonists as potential inhibitors of tissue remodeling. However, the effects of 5-HT2 receptors, especially 5-HT2B receptors on airway function and remodeling, are unclear. We investigated the role of 5-HT2B receptors on airway smooth muscle contractility and remodeling processes. Murine precision-cut lung slices were pretreated with 5-HT2B receptor antagonists (EXT5, EXT9, RS 127445, and PRX 08066), as well as ketanserin (5-HT2A/2C receptor antagonist) (1, 10 μmol/L), before addition of cumulative concentrations of 5-HT to induce bronchoconstriction. Remodeling effects after treatment with 10 μmol/L 5-HT and 5-HT2 receptor antagonists were further studied in distal lung tissue by examining release of profibrotic transforming growth factor (TGF)-β1 and proliferation of human bronchial smooth muscle cells (HBSMCs). 5-HT-induced bronchoconstriction was significantly reduced by EXT5, EXT9, and ketanserin, but not by RS 127445 or PRX 08066. The 5-HT2B receptor antagonists significantly reduced TGF-β1 release. 5-HT, in combination with TGF-β1, increased proliferation of HBSMCs, a process reduced by EXT5 and EXT9. Our results indicate that EXT5 and EXT9 may relieve bronchoconstriction in murine airways and serve as an add-on effect in attenuating pulmonary remodeling by improving airway function. The antiproliferative effect on HBSMCs and the inhibition of TGF-β1 release further support a role of 5-HT2B receptors in pathologic remodeling processes.
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Affiliation(s)
- Anna Löfdahl
- Lung Biology Group, Department of Experimental Medical Science, Lund University, Lund, Sweden.
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23
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P2X7R: independent modulation of aquaporin 5 expression in CdCl 2-injured alveolar epithelial cells. Histochem Cell Biol 2018; 149:197-208. [PMID: 29397411 DOI: 10.1007/s00418-018-1637-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2018] [Indexed: 10/18/2022]
Abstract
The expression of aquaporin 5 in alveolar epithelial type I cells under conditions of cadmium-induced injury has not yet been discovered. We investigated the effect of the P2X7R agonist BzATP under this condition, since P2X7R is involved in altered regulation of aquaporin 5 in pulmonary fibrosis. CdCl2/TGF-β1 treatment of lung epithelial MLE-12 cells was leading to increasing P2X7R, and aquaporin 5 protein levels. The aquaporin 5 expression was P2X7R-independent in MLE-12 cells under cadmium, as was shown in blocking experiments with oxATP. Further, the expression of both proteins increased after 24 h CdCl2/TGF-β1 treatment of precision-cut lung slices, but decreased after 72 h. Using immunohistochemistry, the activation of the P2X7R with the agonist BzATP modulated the aquaporin 5 immunoreactivity in the alveolar epithelium of precision-cut lung slices from wild-type but not from P2X7R knockout mice. Similarly, aquaporin 5 protein was reduced in BzATP-treated immortal lung epithelial E10 cells. Surprisingly, untreated alveolar epithelial type II cells of P2X7R knockouts exhibited a pronounced apical immunoreactivity in addition to the remaining alveolar epithelial type I cells. BzATP exposure did not alter this distribution pattern, but increased the number of apoptotic alveolar epithelial type II cells in wild-type lung slices.
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24
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Geraghty P, Baumlin N, Salathe MA, Foronjy RF, D'Armiento JM. Glutathione Peroxidase-1 Suppresses the Unfolded Protein Response upon Cigarette Smoke Exposure. Mediators Inflamm 2016; 2016:9461289. [PMID: 28070146 PMCID: PMC5187475 DOI: 10.1155/2016/9461289] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 10/19/2016] [Accepted: 10/31/2016] [Indexed: 12/13/2022] Open
Abstract
Oxidative stress provokes endoplasmic reticulum (ER) stress-induced unfolded protein response (UPR) in the lungs of chronic obstructive pulmonary (COPD) subjects. The antioxidant, glutathione peroxidase-1 (GPx-1), counters oxidative stress induced by cigarette smoke exposure. Here, we investigate whether GPx-1 expression deters the UPR following exposure to cigarette smoke. Expression of ER stress markers was investigated in fully differentiated normal human bronchial epithelial (NHBE) cells isolated from nonsmoking, smoking, and COPD donors and redifferentiated at the air liquid interface. NHBE cells from COPD donors expressed heightened ATF4, XBP1, GRP78, GRP94, EDEM1, and CHOP compared to cells from nonsmoking donors. These changes coincided with reduced GPx-1 expression. Reintroduction of GPx-1 into NHBE cells isolated from COPD donors reduced the UPR. To determine whether the loss of GPx-1 expression has a direct impact on these ER stress markers during smoke exposure, Gpx-1-/- mice were exposed to cigarette smoke for 1 year. Loss of Gpx-1 expression enhanced cigarette smoke-induced ER stress and apoptosis. Equally, induction of ER stress with tunicamycin enhanced antioxidant expression in mouse precision-cut lung slices. Smoke inhalation also exacerbated the UPR response during respiratory syncytial virus infection. Therefore, ER stress may be an antioxidant-related pathophysiological event in COPD.
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Affiliation(s)
- Patrick Geraghty
- Division of Pulmonary & Critical Care Medicine, Department of Medicine, State University of New York Downstate Medical Center, Brooklyn, NY, USA
- Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, NY, USA
| | - Nathalie Baumlin
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, University of Miami, Miami, FL, USA
| | - Matthias A. Salathe
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, University of Miami, Miami, FL, USA
| | - Robert F. Foronjy
- Division of Pulmonary & Critical Care Medicine, Department of Medicine, State University of New York Downstate Medical Center, Brooklyn, NY, USA
- Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, NY, USA
| | - Jeanine M. D'Armiento
- Center for Pulmonary Disease, Department of Anesthesiology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
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25
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Hiorns JE, Bidan CM, Jensen OE, Gosens R, Kistemaker LEM, Fredberg JJ, Butler JP, Krishnan R, Brook BS. Airway and Parenchymal Strains during Bronchoconstriction in the Precision Cut Lung Slice. Front Physiol 2016; 7:309. [PMID: 27559314 PMCID: PMC4989902 DOI: 10.3389/fphys.2016.00309] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 07/07/2016] [Indexed: 01/25/2023] Open
Abstract
The precision-cut lung slice (PCLS) is a powerful tool for studying airway reactivity, but biomechanical measurements to date have largely focused on changes in airway caliber. Here we describe an image processing tool that reveals the associated spatio-temporal changes in airway and parenchymal strains. Displacements of sub-regions within the PCLS are tracked in phase-contrast movies acquired after addition of contractile and relaxing drugs. From displacement maps, strains are determined across the entire PCLS or along user-specified directions. In a representative mouse PCLS challenged with 10(-4)M methacholine, as lumen area decreased, compressive circumferential strains were highest in the 50 μm closest to the airway lumen while expansive radial strains were highest in the region 50-100 μm from the lumen. However, at any given distance from the airway the strain distribution varied substantially in the vicinity of neighboring small airways and blood vessels. Upon challenge with the relaxant agonist chloroquine, although most strains disappeared, residual positive strains remained a long time after addition of chloroquine, predominantly in the radial direction. Taken together, these findings establish strain mapping as a new tool to elucidate local dynamic mechanical events within the constricting airway and its supporting parenchyma.
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Affiliation(s)
- Jonathan E Hiorns
- School of Mathematical Sciences, University of Nottingham Nottingham, UK
| | - Cécile M Bidan
- Laboratoire Interdisciplinaire de Physique, Centre National de la Recherche Scientifique, Université Grenoble AlpesGrenoble, France; Department of Molecular Pharmacology, University of GroningenGroningen, Netherlands; Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Harvard Medical SchoolBoston, MA, USA
| | - Oliver E Jensen
- School of Mathematics, University of Manchester Manchester, UK
| | - Reinoud Gosens
- Department of Molecular Pharmacology, University of Groningen Groningen, Netherlands
| | - Loes E M Kistemaker
- Department of Molecular Pharmacology, University of Groningen Groningen, Netherlands
| | - Jeffrey J Fredberg
- Department of Environmental Health, Harvard School of Public Health Boston, MA, USA
| | - Jim P Butler
- Department of Environmental Health, Harvard School of Public Health Boston, MA, USA
| | - Ramaswamy Krishnan
- Department of Emergency Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School Boston, MA, USA
| | - Bindi S Brook
- School of Mathematical Sciences, University of Nottingham Nottingham, UK
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Prevalidation of the ex-vivo model PCLS for prediction of respiratory toxicity. Toxicol In Vitro 2016; 32:347-61. [DOI: 10.1016/j.tiv.2016.01.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 01/05/2016] [Accepted: 01/07/2016] [Indexed: 11/19/2022]
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27
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Tabeling C, Noe E, Naujoks J, Doehn JM, Hippenstiel S, Opitz B, Suttorp N, Klopfleisch R, Witzenrath M. PKCα Deficiency in Mice Is Associated with Pulmonary Vascular Hyperresponsiveness to Thromboxane A2 and Increased Thromboxane Receptor Expression. J Vasc Res 2016; 52:279-88. [PMID: 26890419 DOI: 10.1159/000443402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 12/14/2015] [Indexed: 11/19/2022] Open
Abstract
Pulmonary vascular hyperresponsiveness is a main characteristic of pulmonary arterial hypertension (PAH). In PAH patients, elevated levels of the vasoconstrictors thromboxane A2 (TXA2), endothelin (ET)-1 and serotonin further contribute to pulmonary hypertension. Protein kinase C (PKC) isozyme alpha (PKCα) is a known modulator of smooth muscle cell contraction. However, the effects of PKCα deficiency on pulmonary vasoconstriction have not yet been investigated. Thus, the role of PKCα in pulmonary vascular responsiveness to the TXA2 analog U46619, ET-1, serotonin and acute hypoxia was investigated in isolated lungs of PKCα-/- mice and corresponding wild-type mice, with or without prior administration of the PKC inhibitor bisindolylmaleimide I or Gö6976. mRNA was quantified from microdissected intrapulmonary arteries. We found that broad-spectrum PKC inhibition reduced pulmonary vascular responsiveness to ET-1 and acute hypoxia and, by trend, to U46619. Analogously, selective inhibition of conventional PKC isozymes or PKCα deficiency reduced ET-1-evoked pulmonary vasoconstriction. The pulmonary vasopressor response to serotonin was unaffected by either broad PKC inhibition or PKCα deficiency. Surprisingly, PKCα-/- mice showed pulmonary vascular hyperresponsiveness to U46619 and increased TXA2 receptor (TP receptor) expression in the intrapulmonary arteries. To conclude, PKCα regulates ET-1-induced pulmonary vasoconstriction. However, PKCα deficiency leads to pulmonary vascular hyperresponsiveness to TXA2, possibly via increased pulmonary arterial TP receptor expression.
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Affiliation(s)
- Christoph Tabeling
- Department of Infectious Diseases and Pulmonary Medicine, Charitx00E9; - Universitx00E4;tsmedizin Berlin, Berlin, Germany
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Wang M, Shibamoto T, Kuda Y, Tanida M, Zhang T, Song J, Kurata Y. The responses of pulmonary and systemic circulation and airway to anaphylactic mediators in anesthetized BALB/c mice. Life Sci 2016; 147:77-84. [DOI: 10.1016/j.lfs.2016.01.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 12/11/2015] [Accepted: 01/21/2016] [Indexed: 11/29/2022]
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Siemsen DW, Dobrinen E, Han S, Chiocchi K, Meissner N, Swain SD. Vascular Dysfunction in Pneumocystis-Associated Pulmonary Hypertension Is Related to Endothelin Response and Adrenomedullin Concentration. THE AMERICAN JOURNAL OF PATHOLOGY 2015; 186:259-69. [PMID: 26687815 DOI: 10.1016/j.ajpath.2015.10.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 09/29/2015] [Accepted: 10/22/2015] [Indexed: 10/22/2022]
Abstract
Pulmonary hypertension subsequent to an infectious disease can be due to vascular structural remodeling or to functional alterations within various vascular cell types. In our previous mouse model of Pneumocystis-associated pulmonary hypertension, we found that vascular remodeling was not responsible for observed increases in right ventricular pressures. Here, we report that the vascular dysfunction we observed could be explained by an enhanced response to endothelin-1 (20% greater reduction in lumen diameter, P ≤ 0.05), corresponding to an up-regulation of similar magnitude (P ≤ 0.05) of the endothelin A receptor in the lung tissue. This effect was potentially augmented by a decrease in production of the pulmonary vasodilator adrenomedullin of almost 70% (P ≤ 0.05). These changes did not occur in interferon-γ knockout mice similarly treated, which do not develop pulmonary hypertension under these circumstances. Surprisingly, we did not observe any relevant changes in the vascular endothelial nitric oxide synthase vasodilatory response, which is a common potential site of inflammatory alterations to pulmonary vascular function. Our results indicate the diverse mechanisms by which inflammatory responses to prior infections can cause functionally relevant changes in vascular responses in the lung, promoting the development of pulmonary hypertension.
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Affiliation(s)
- Dan W Siemsen
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana
| | - Erin Dobrinen
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana
| | - Soo Han
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana
| | - Kari Chiocchi
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana
| | - Nicole Meissner
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana
| | - Steve D Swain
- Department of Microbiology and Immunology, Montana State University, Bozeman, Montana.
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Mahiny AJ, Dewerth A, Mays LE, Alkhaled M, Mothes B, Malaeksefat E, Loretz B, Rottenberger J, Brosch DM, Reautschnig P, Surapolchai P, Zeyer F, Schams A, Carevic M, Bakele M, Griese M, Schwab M, Nürnberg B, Beer-Hammer S, Handgretinger R, Hartl D, Lehr CM, Kormann MSD. In vivo genome editing using nuclease-encoding mRNA corrects SP-B deficiency. Nat Biotechnol 2015; 33:584-6. [PMID: 25985262 DOI: 10.1038/nbt.3241] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Azita J Mahiny
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Alexander Dewerth
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Lauren E Mays
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Mohammed Alkhaled
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Benedikt Mothes
- 1] Department of Pharmacology and Experimental Therapy, University of Tübingen, Tübingen, Germany. [2] ICePha, University of Tübingen, Tübingen, Germany
| | - Emad Malaeksefat
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarbrücken, Germany
| | - Brigitta Loretz
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarbrücken, Germany
| | - Jennifer Rottenberger
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Darina M Brosch
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Philipp Reautschnig
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Pacharapan Surapolchai
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Franziska Zeyer
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Andrea Schams
- 1] Department of Pediatric Pulmonology, Dr. von Hauner Children's Hospital, Ludwig Maximilians University, Munich, Germany. [2] Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Melanie Carevic
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Martina Bakele
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Matthias Griese
- 1] Department of Pediatric Pulmonology, Dr. von Hauner Children's Hospital, Ludwig Maximilians University, Munich, Germany. [2] Member of the German Center for Lung Research (DZL), Munich, Germany
| | - Matthias Schwab
- 1] ICePha, University of Tübingen, Tübingen, Germany. [2] Department of Clinical Pharmacology, University of Tübingen, Tübingen, Germany. [3] Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, Germany
| | - Bernd Nürnberg
- Department of Pharmacology and Experimental Therapy, University of Tübingen, Tübingen, Germany
| | - Sandra Beer-Hammer
- Department of Pharmacology and Experimental Therapy, University of Tübingen, Tübingen, Germany
| | - Rupert Handgretinger
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Dominik Hartl
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
| | - Claus-Michael Lehr
- 1] Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research (HZI), Saarbrücken, Germany. [2] Department of Pharmacy, Saarland University, Saarbrücken, Germany
| | - Michael S D Kormann
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
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Pulmonary Vascular and Airway Responses to Systemic Vasoconstrictors in Anesthetized BALB/c Mice. J Cardiovasc Pharmacol 2015; 65:325-34. [DOI: 10.1097/fjc.0000000000000199] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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32
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A co-culture system with an organotypic lung slice and an immortal alveolar macrophage cell line to quantify silica-induced inflammation. PLoS One 2015; 10:e0117056. [PMID: 25635824 PMCID: PMC4312074 DOI: 10.1371/journal.pone.0117056] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Accepted: 12/18/2014] [Indexed: 11/20/2022] Open
Abstract
There is growing evidence that amorphous silica nanoparticles cause toxic effects on lung cells in vivo as well as in vitro and induce inflammatory processes. The phagocytosis of silica by alveolar macrophages potentiates these effects. To understand the underlying molecular mechanisms of silica toxicity, we applied a co-culture system including the immortal alveolar epithelial mouse cell line E10 and the macrophage cell line AMJ2-C11. In parallel we exposed precision-cut lung slices (lacking any blood cells as well as residual alveolar macrophages) of wild type and P2rx7−/− mice with or without AMJ2-C11 cells to silica nanoparticles. Exposure of E10 cells as well as slices of wild type mice resulted in an increase of typical alveolar epithelial type 1 cell proteins like T1α, caveolin-1 and -2 and PKC-β1, whereas the co-culture with AMJ2-C11 showed mostly a slightly lesser increase of these proteins. In P2rx7−/− mice most of these proteins were slightly decreased. ELISA analysis of the supernatant of wild type and P2rx7−/− mice precision-cut lung slices showed decreased amounts of IL-6 and TNF-α when incubated with nano-silica. Our findings indicate that alveolar macrophages influence the early inflammation of the lung and also that cell damaging reagents e.g. silica have a smaller impact on P2rx7−/− mice than on wild type mice. The co-culture system with an organotypic lung slice is a useful tool to study the role of alveolar macrophages during lung injury at the organoid level.
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Lee-Gosselin A, Gendron D, Blanchet MR, Marsolais D, Bossé Y. The gain of smooth muscle's contractile capacity induced by tone on in vivo airway responsiveness in mice. J Appl Physiol (1985) 2015; 118:692-8. [PMID: 25571989 DOI: 10.1152/japplphysiol.00645.2014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Airway hyperresponsiveness to a spasmogenic challenge such as methacholine, and an increased baseline tone measured by the reversibility of airway obstruction with a bronchodilator, are two common features of asthma. However, whether the increased tone influences the degree of airway responsiveness to a spasmogen is unclear. Herein, we hypothesized that increased tone augments airway responsiveness in vivo by increasing the contractile capacity of airway smooth muscle (ASM). Anesthetized, tracheotomized, paralyzed, and mechanically ventilated mice were either exposed (experimental group) or not (control group) to tone for 20 min, which was elicited by nebulizing serial small doses of methacholine. Respiratory system resistance was monitored during this period and the peak response to a large cumulative dose of methacholine was then measured at the end of 20 min to assess and compare the level of airway responsiveness between groups. To confirm direct ASM involvement, the contractile capacity of excised murine tracheas was measured with and without preexposure to tone elicited by either methacholine or a thromboxane A2 mimetic (U46619). Distinct spasmogens were tested because the spasmogens liable for increased tone in asthma are likely to differ. The results indicate that preexposure to tone increases airway responsiveness in vivo by 126 ± 37% and increases the contractile capacity of excised tracheas ex vivo by 23 ± 4% for methacholine and 160 ± 63% for U46619. We conclude that an increased tone, regardless of whether it is elicited by a muscarinic agonist or a thromboxane A2 mimetic, may contribute to airway hyperresponsiveness by increasing the contractile capacity of ASM.
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Affiliation(s)
- Audrey Lee-Gosselin
- Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Québec, Canada
| | - David Gendron
- Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Québec, Canada
| | - Marie-Renée Blanchet
- Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Québec, Canada
| | - David Marsolais
- Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Québec, Canada
| | - Ynuk Bossé
- Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec, Québec, Canada
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Kim HJ, Kim Y, Park SJ, Bae B, Kang HR, Cho SH, Yoo HY, Nam JH, Kim WK, Kim SJ. Airway Smooth Muscle Sensitivity to Methacholine in Precision-Cut Lung Slices (PCLS) from Ovalbumin-induced Asthmatic Mice. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2014; 19:65-71. [PMID: 25605999 PMCID: PMC4297764 DOI: 10.4196/kjpp.2015.19.1.65] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 11/20/2014] [Accepted: 11/21/2014] [Indexed: 11/22/2022]
Abstract
Asthma is a chronic inflammatory disease characterized by airway hyperresponsiveness (AHR) and reversible airway obstruction. Methacholine (MCh) is widely used in broncho-provocation test to evaluate airway resistance. For experimental investigation, ovalbumin-induced sensitization is frequently used in rodents (Ova-asthma). However, albeit the inflammatory histology and AHR in vivo, it remains unclear whether the MCh sensitivity of airway smooth muscle isolated from Ova-asthma is persistently changed. In this study, the contractions of airways in precision-cut lung slices (PCLS) from control, Ova-asthma, and IL-13 overexpressed transgenic mice (IL-13TG) were compared by analyzing the airway lumen space (AW). The airway resistance in vivo was measured using plethysmograph. AHR and increased inflammatory cells in BAL fluid were confirmed in Ova-asthma and IL-13TG mice. In the PCLS from all three groups, MCh concentration-dependent narrowing of airway lumen (ΔAW) was observed. In contrast to the AHR in vivo, the EC50 of MCh for ΔAW from Ova-asthma and IL-13TG were not different from control, indicating unchanged sensitivity to MCh. Although the AW recovery upon MCh-washout showed sluggish tendency in Ova-asthma, the change was also statistically insignificant. Membrane depolarization-induced ΔAW by 60 mM K+ (60K-contraction) was larger in IL-13TG than control, whereas 60K-contraction of Ova-asthma was unaffected. Furthermore, serotonin-induced ΔAW of Ova-asthma was smaller than control and IL-13TG. Taken together, the AHR in Ova-asthma and IL-13TG are not reflected in the contractility of isolated airways from PCLS. The AHR of the model animals seems to require intrinsic agonists or inflammatory microenvironment that is washable during tissue preparation.
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Affiliation(s)
- Hae Jin Kim
- Department of Physiology, Seoul National University College of Medicine, Seoul 110-799, Korea. ; Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 110-799, Korea
| | - Yeryung Kim
- Department of Physiology, Seoul National University College of Medicine, Seoul 110-799, Korea
| | - Su Jung Park
- Department of Physiology, Seoul National University College of Medicine, Seoul 110-799, Korea
| | - Boram Bae
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul 110-799, Korea
| | - Hye-Ryun Kang
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul 110-799, Korea
| | - Sang-Heon Cho
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul 110-799, Korea
| | - Hae Young Yoo
- Chung-Ang University Red Cross College of Nursing, Seoul 100-031, Korea
| | - Joo Hyun Nam
- hannelopathy Research Center (CRC), Dongguk University College of Medicine, Goyang 410-773, Korea
| | - Woo Kyung Kim
- hannelopathy Research Center (CRC), Dongguk University College of Medicine, Goyang 410-773, Korea
| | - Sung Joon Kim
- Department of Physiology, Seoul National University College of Medicine, Seoul 110-799, Korea. ; Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 110-799, Korea. ; hannelopathy Research Center (CRC), Dongguk University College of Medicine, Goyang 410-773, Korea
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Yoo HY, Park SJ, Kim HJ, Kim WK, Kim SJ. Integrative understanding of hypoxic pulmonary vasoconstriction using in vitro models: from ventilated/perfused lung to single arterial myocyte. Integr Med Res 2014; 3:180-188. [PMID: 28664095 PMCID: PMC5481745 DOI: 10.1016/j.imr.2014.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 08/27/2014] [Accepted: 08/27/2014] [Indexed: 10/25/2022] Open
Abstract
Contractile response of a pulmonary artery (PA) to hypoxia (hypoxic pulmonary vasoconstriction; HPV) is a unique physiological reaction. HPV is beneficial for the optimal distribution of blood flow to differentially ventilated alveolar regions in the lung, thereby preventing systemic hypoxemia. Numerous in vitro studies have been conducted to elucidate the mechanisms underlying HPV. These studies indicate that PA smooth muscle cells (PASMCs) sense lowers the oxygen partial pressure (PO2) and contract under hypoxia. As for the PO2-sensing molecules, a variety of ion channels in PASMCs had been suggested. Nonetheless, the modulator(s) of the ion channels alone cannot mimic HPV in the experiments using PA segments and/or isolated organs. We compared the hypoxic responses of PASMCs, PAs, lung slices, and total lungs using a variety of methods (e.g., patch-clamp technique, isometric contraction measurement, video analysis of precision-cut lung slices, and PA pressure measurement in ventilated/perfused lungs). In this review, the relevant results are compared to provide a comprehensive understanding of HPV. Integration of the influences from surrounding tissues including blood cells as well as the hypoxic regulation of ion channels in PASMCs are indispensable for insights into HPV and other related clinical conditions.
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Affiliation(s)
- Hae Young Yoo
- Red Cross College of Nursing, Chung-Ang University, Seoul, Korea
| | - Su Jung Park
- Department of Physiology, College of Medicine, Seoul National University, Seoul, Korea.,Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul, Korea.,Ischemic/Hypoxic Disease Institute, College of Medicine, Seoul National University, Seoul, Korea
| | - Hae Jin Kim
- Department of Physiology, College of Medicine, Seoul National University, Seoul, Korea.,Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul, Korea.,Ischemic/Hypoxic Disease Institute, College of Medicine, Seoul National University, Seoul, Korea
| | - Woo Kyung Kim
- Department of Internal Medicine and Channelopathy Research Institute (CRC), College of Medicine, Dongguk University, Goyang, Korea
| | - Sung Joon Kim
- Department of Physiology, College of Medicine, Seoul National University, Seoul, Korea.,Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul, Korea.,Ischemic/Hypoxic Disease Institute, College of Medicine, Seoul National University, Seoul, Korea
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Lambermont VA, Schlepütz M, Dassow C, König P, Zimmermann LJ, Uhlig S, Kramer BW, Martin C. Comparison of airway responses in sheep of different age in precision-cut lung slices (PCLS). PLoS One 2014; 9:e97610. [PMID: 25229890 PMCID: PMC4167544 DOI: 10.1371/journal.pone.0097610] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Accepted: 04/22/2014] [Indexed: 12/16/2022] Open
Abstract
Background Animal models should display important characteristics of the human disease. Sheep have been considered particularly useful to study allergic airway responses to common natural antigens causing human asthma. A rationale of this study was to establish a model of ovine precision-cut lung slices (PCLS) for the in vitro measurement of airway responses in newborn and adult animals. We hypothesized that differences in airway reactivity in sheep are present at different ages. Methods Lambs were delivered spontaneously at term (147d) and adult sheep lived till 18 months. Viability of PCLS was confirmed by the MTT-test. To study airway provocations cumulative concentration-response curves were performed with different allergic response mediators and biogenic amines. In addition, electric field stimulation, passive sensitization with house dust mite (HDM) and mast cells staining were evaluated. Results PCLS from sheep were viable for at least three days. PCLS of newborn and adult sheep responded equally strong to methacholine and endothelin-1. The responses to serotonin, leukotriene D4 and U46619 differed with age. No airway contraction was evoked by histamine, except after cimetidine pretreatment. In response to EFS, airways in PCLS from adult and newborn sheep strongly contracted and these contractions were atropine sensitive. Passive sensitization with HDM evoked a weak early allergic response in PCLS from adult and newborn sheep, which notably was prolonged in airways from adult sheep. Only few mast cells were found in the lungs of non-sensitized sheep at both ages. Conclusion PCLS from sheep lungs represent a useful tool to study pharmacological airway responses for at least three days. Sheep seem well suited to study mechanisms of cholinergic airway contraction. The notable differences between newborn and adult sheep demonstrate the importance of age in such studies.
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Affiliation(s)
- Verena A. Lambermont
- Department of Pediatrics, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Marco Schlepütz
- Institute of Pharmacology and Toxicology, University Hospital Aachen, Aachen, Germany
| | - Constanze Dassow
- Institute of Pharmacology and Toxicology, University Hospital Aachen, Aachen, Germany
| | - Peter König
- Institute of Anatomy, University of Lübeck, Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL), Lübeck, Germany
| | - Luc J. Zimmermann
- Department of Pediatrics, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Stefan Uhlig
- Institute of Pharmacology and Toxicology, University Hospital Aachen, Aachen, Germany
| | - Boris W. Kramer
- Department of Pediatrics, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Christian Martin
- Institute of Pharmacology and Toxicology, University Hospital Aachen, Aachen, Germany
- * E-mail:
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Rosner SR, Ram-Mohan S, Paez-Cortez JR, Lavoie TL, Dowell ML, Yuan L, Ai X, Fine A, Aird WC, Solway J, Fredberg JJ, Krishnan R. Airway contractility in the precision-cut lung slice after cryopreservation. Am J Respir Cell Mol Biol 2014; 50:876-81. [PMID: 24313705 DOI: 10.1165/rcmb.2013-0166ma] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
An emerging tool in airway biology is the precision-cut lung slice (PCLS). Adoption of the PCLS as a model for assessing airway reactivity has been hampered by the limited time window within which tissues remain viable. Here we demonstrate that the PCLS can be frozen, stored long-term, and then thawed for later experimental use. Compared with the never-frozen murine PCLS, the frozen-thawed PCLS shows metabolic activity that is decreased to an extent comparable to that observed in other cryopreserved tissues but shows no differences in cell viability or in airway caliber responses to the contractile agonist methacholine or the relaxing agonist chloroquine. These results indicate that freezing and long-term storage is a feasible solution to the problem of limited viability of the PCLS in culture.
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Affiliation(s)
- Sonia R Rosner
- 1 Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts
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Lelkes E, Headley MB, Thornton EE, Looney MR, Krummel MF. The spatiotemporal cellular dynamics of lung immunity. Trends Immunol 2014; 35:379-86. [PMID: 24974157 DOI: 10.1016/j.it.2014.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 05/19/2014] [Accepted: 05/21/2014] [Indexed: 01/08/2023]
Abstract
The lung is a complex structure that is interdigitated with immune cells. Understanding the 4D process of normal and defective lung function and immunity has been a centuries-old problem. Challenges intrinsic to the lung have limited adequate microscopic evaluation of its cellular dynamics in real time, until recently. Because of emerging technologies, we now recognize alveolar-to-airway transport of inhaled antigen. We understand the nature of neutrophil entry during lung injury and are learning more about cellular interactions during inflammatory states. Insights are also accumulating in lung development and the metastatic niche of the lung. Here we assess the developing technology of lung imaging, its merits for studies of pathophysiology and areas where further advances are needed.
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Affiliation(s)
- Efrat Lelkes
- Department of Pediatrics, University of California-San Francisco, 513 Parnassus Avenue, HSW 518, San Francisco, CA 94143-0511, USA; Department of Pathology, University of California-San Francisco, 513 Parnassus Avenue, HSW 518, San Francisco, CA 94143-0511, USA
| | - Mark B Headley
- Department of Pathology, University of California-San Francisco, 513 Parnassus Avenue, HSW 518, San Francisco, CA 94143-0511, USA
| | - Emily E Thornton
- Department of Pathology, University of California-San Francisco, 513 Parnassus Avenue, HSW 518, San Francisco, CA 94143-0511, USA
| | - Mark R Looney
- Department of Medicine, University of California-San Francisco, 513 Parnassus Avenue, HSE 1355A, San Francisco, CA 94143-0511, USA
| | - Matthew F Krummel
- Department of Pathology, University of California-San Francisco, 513 Parnassus Avenue, HSW 518, San Francisco, CA 94143-0511, USA.
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Heine G, Tabeling C, Hartmann B, González Calera CR, Kühl AA, Lindner J, Radbruch A, Witzenrath M, Worm M. 25-hydroxvitamin D3 promotes the long-term effect of specific immunotherapy in a murine allergy model. THE JOURNAL OF IMMUNOLOGY 2014; 193:1017-23. [PMID: 24951815 DOI: 10.4049/jimmunol.1301656] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Calcitriol (1α,25-dihydroxyvitamin D3) is the active vitamin D metabolite and mediates immunological functions, which are relevant in allergy. Its therapeutic use is limited by hypercalcaemic toxicity. We have previously shown that the activation of the vitamin D receptor inhibits IgE production and that B cells can synthesize calcitriol from its precursor 25-hydroxyvitamin D3 (inactive precursor) [25(OH)D] upon antigenic stimulation. In this study, we address the impact of 25(OH)D on the development of type I sensitization and determine its role in allergen-specific immunotherapy. BALB/c mice were sensitized to OVA, under 25(OH)D-deficient or sufficient conditions. The humoral immune response over time was measured by ELISA. OVA-specific immunotherapy was established and studied in a murine model of allergic airway inflammation using lung histology, pulmonary cytokine expression analysis, and functional parameters in isolated and perfused mouse lungs. In 25(OH)D-deficient mice, OVA-specific IgE and IgG1 serum concentrations were increased compared with control mice. OVA-specific immunotherapy reduced the humoral immune reaction after OVA recall dose-dependently. Coadministration of 25(OH)D in the context of OVA-specific immunotherapy reduced the allergic airway inflammation and responsiveness upon OVA challenge. These findings were paralleled by reduced Th2 cytokine expression in the lungs. In conclusion, 25(OH)D deficiency promotes the development of type I sensitization and correction of its serum concentrations enhances the benefit of specific immunotherapy.
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Affiliation(s)
- Guido Heine
- Department of Dermatology, Venerology and Allergy, Allergy-Center-Charité, Charité Campus Mitte, Charité - Universitätsmedizin, D-10117 Berlin, Germany
| | - Christoph Tabeling
- Department of Infectious Diseases and Pulmonary Medicine, Charité - Universitätsmedizin, D-10117 Berlin, Germany
| | - Bjoern Hartmann
- Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305
| | - Carla R González Calera
- Department of Infectious Diseases and Pulmonary Medicine, Charité - Universitätsmedizin, D-10117 Berlin, Germany
| | - Anja A Kühl
- Department of Internal Medicine, Rheumatology and Clinical Immunology, Research Center Immuno Sciences, Charité Campus Benjamin Franklin, Charité - Universitätsmedizin, D-10117 Berlin, Germany; and
| | - Juliane Lindner
- Department of Dermatology, Venerology and Allergy, Allergy-Center-Charité, Charité Campus Mitte, Charité - Universitätsmedizin, D-10117 Berlin, Germany
| | - Andreas Radbruch
- Deutsches Rheuma-Forschungszentrum Berlin, D-10117 Berlin, Germany
| | - Martin Witzenrath
- Department of Infectious Diseases and Pulmonary Medicine, Charité - Universitätsmedizin, D-10117 Berlin, Germany
| | - Margitta Worm
- Department of Dermatology, Venerology and Allergy, Allergy-Center-Charité, Charité Campus Mitte, Charité - Universitätsmedizin, D-10117 Berlin, Germany;
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Effect of P2X7 receptor knockout on AQP-5 expression of type I alveolar epithelial cells. PLoS One 2014; 9:e100282. [PMID: 24941004 PMCID: PMC4062497 DOI: 10.1371/journal.pone.0100282] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 05/26/2014] [Indexed: 01/13/2023] Open
Abstract
P2X7 receptors, ATP-gated cation channels, are specifically expressed in alveolar epithelial cells. The pathophysiological function of this lung cell type, except a recently reported putative involvement in surfactant secretion, is unknown. In addition, P2X7 receptor-deficient mice show reduced inflammation and lung fibrosis after exposure with bleomycin. To elucidate the role of the P2X7 receptor in alveolar epithelial type I cells we characterized the pulmonary phenotype of P2X7 receptor knockout mice by using immunohistochemistry, western blot analysis and real-time RT PCR. No pathomorphological signs of fibrosis were found. Results revealed, however, a remarkable loss of aquaporin-5 protein and mRNA in young knockout animals. Additional in vitro experiments with bleomycin treated precision cut lung slices showed a greater sensitivity of the P2X7 receptor knockout mice in terms of aquaporin-5 reduction as wild type animals. Finally, P2X7 receptor function was examined by using the alveolar epithelial cell lines E10 and MLE-12 for stimulation experiments with bleomycin. The in vitro activation of P2X7 receptor was connected with an increase of aquaporin-5, whereas the inhibition of the receptor with oxidized ATP resulted in down regulation of aquaporin-5. The early loss of aquaporin-5 which can be found in different pulmonary fibrosis models does not implicate a specific pathogenetic role during fibrogenesis.
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41
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Bourke JE, Bai Y, Donovan C, Esposito JG, Tan X, Sanderson MJ. Novel small airway bronchodilator responses to rosiglitazone in mouse lung slices. Am J Respir Cell Mol Biol 2014; 50:748-56. [PMID: 24188042 DOI: 10.1165/rcmb.2013-0247oc] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
There is a need to identify novel agents that elicit small airway relaxation when β2-adrenoceptor agonists become ineffective in difficult-to-treat asthma. Because chronic treatment with the synthetic peroxisome proliferator activated receptor (PPAR)γ agonist rosiglitazone (RGZ) inhibits airway hyperresponsiveness in mouse models of allergic airways disease, we tested the hypothesis that RGZ causes acute airway relaxation by measuring changes in small airway size in mouse lung slices. Whereas the β-adrenoceptor agonists albuterol (ALB) and isoproterenol induced partial airway relaxation, RGZ reversed submaximal and maximal contraction to methacholine (MCh) and was similarly effective after precontraction with serotonin or endothelin-1. Concentration-dependent relaxation to RGZ was not altered by the β-adrenoceptor antagonist propranolol and was enhanced by ALB. RGZ-induced relaxation was mimicked by other synthetic PPARγ agonists but not by the putative endogenous agonist 15-deoxy-PGJ2 and was not prevented by the PPARγ antagonist GW9662. To induce airway relaxation, RGZ inhibited the amplitude and frequency of MCh-induced Ca(2+) oscillations of airway smooth muscle cells (ASMCs). In addition, RGZ reduced MCh-induced Ca(2+) sensitivity of the ASMCs. Collectively, these findings demonstrate that acute bronchodilator responses induced by RGZ are PPARγ independent, additive with ALB, and occur by the inhibition of ASMC Ca(2+) signaling and Ca(2+) sensitivity. Because RGZ continues to elicit relaxation when β-adrenoceptor agonists have a limited effect, RGZ or related compounds may have potential as bronchodilators for the treatment of difficult asthma.
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Affiliation(s)
- Jane E Bourke
- 1 Lung Health Research Centre, Department of Pharmacology and Therapeutics, University of Melbourne, Parkville, Victoria, Australia; and
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42
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Neuhaus V, Chichester JA, Ebensen T, Schwarz K, Hartman CE, Shoji Y, Guzmán CA, Yusibov V, Sewald K, Braun A. A new adjuvanted nanoparticle-based H1N1 influenza vaccine induced antigen-specific local mucosal and systemic immune responses after administration into the lung. Vaccine 2014; 32:3216-22. [DOI: 10.1016/j.vaccine.2014.04.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 01/31/2014] [Accepted: 04/01/2014] [Indexed: 11/28/2022]
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Brueggemann LI, Haick JM, Neuburg S, Tate S, Randhawa D, Cribbs LL, Byron KL. KCNQ (Kv7) potassium channel activators as bronchodilators: combination with a β2-adrenergic agonist enhances relaxation of rat airways. Am J Physiol Lung Cell Mol Physiol 2014; 306:L476-86. [PMID: 24441871 PMCID: PMC3949081 DOI: 10.1152/ajplung.00253.2013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 01/16/2014] [Indexed: 12/19/2022] Open
Abstract
KCNQ (Kv7 family) potassium (K(+)) channels were recently found in airway smooth muscle cells (ASMCs) from rodent and human bronchioles. In the present study, we evaluated expression of KCNQ channels and their role in constriction/relaxation of rat airways. Real-time RT-PCR analysis revealed expression of KCNQ4 > KCNQ5 > KCNQ1 > KCNQ2 > KCNQ3, and patch-clamp electrophysiology detected KCNQ currents in rat ASMCs. In precision-cut lung slices, the KCNQ channel activator retigabine induced a concentration-dependent relaxation of small bronchioles preconstricted with methacholine (MeCh; EC50 = 3.6 ± 0.3 μM). Bronchoconstriction was also attenuated in the presence of two other structurally unrelated KCNQ channel activators: zinc pyrithione (ZnPyr; 1 μM; 22 ± 7%) and 2,5-dimethylcelecoxib (10 μM; 24 ± 8%). The same three KCNQ channel activators increased KCNQ currents in ASMCs by two- to threefold. The bronchorelaxant effects of retigabine and ZnPyr were prevented by inclusion of the KCNQ channel blocker XE991. A long-acting β2-adrenergic receptor agonist, formoterol (10 nM), did not increase KCNQ current amplitude in ASMCs, but formoterol (1-1,000 nM) did induce a time- and concentration-dependent relaxation of rat airways, with a notable desensitization during a 30-min treatment or with repetitive treatments. Coadministration of retigabine (10 μM) with formoterol produced a greater peak and sustained reduction of MeCh-induced bronchoconstriction and reduced the apparent desensitization observed with formoterol alone. Our findings support a role for KCNQ K(+) channels in the regulation of airway diameter. A combination of a β2-adrenergic receptor agonist with a KCNQ channel activator may improve bronchodilator therapy.
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Affiliation(s)
- Lioubov I Brueggemann
- Dept. of Molecular Pharmacology & Therapeutics, Loyola Univ. Chicago, Stritch School of Medicine, 2160 S. First Ave., Bldg. 102, Rm. 3634, Maywood, IL 60153.
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44
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McAlexander MA, Luttmann MA, Hunsberger GE, Undem BJ. Transient receptor potential vanilloid 4 activation constricts the human bronchus via the release of cysteinyl leukotrienes. J Pharmacol Exp Ther 2014; 349:118-25. [PMID: 24504097 DOI: 10.1124/jpet.113.210203] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Prior studies have demonstrated that the ion channel transient receptor potential vanilloid 4 (TRPV4) is functionally expressed in airway smooth muscle cells and that TRPV4 single nucleotide polymorphisms are associated with airflow obstruction in patients with chronic obstructive pulmonary disease. We sought to use isometric tension measurements in ex vivo airways to determine whether short-term pharmacological activation of TRPV4 with the potent agonist GSK1016790 [N-((1S)-1-{[4-((2S)-2-{[(2,4-dichlorophenyl)sulfonyl]amino}-3-hydroxypropanoyl)-1-piperazinyl]carbonyl}-3-methylbutyl)-1-benzothiophene-2-carboxamide] would constrict human bronchial tissue. As predicted, transient receptor potential vanilloid 4 activation in the human airway produces contractions that are blocked by the nonselective transient receptor potential channel blocker ruthenium red. Moreover, the novel TRPV4-selective blocker GSK2334775 [(R)-6-(methylsulfonyl)-3-((4-(pyrrolidin-1-yl)piperindin-1-yl)methyl)-N-(2,2,2,-trifluoro-1-phenylethyl)-2-(3-(trifluoromethyl)phenyl)quinoline-4-carboxamide] inhibited these contractions over a concentration range consistent with its in vitro potency against recombinant and native TRPV4-containing channels. Surprisingly, TRPV4-dependent contractions were also blocked by a 5-lipoxygenase inhibitor and two structurally distinct cysteinyl leukotriene 1 receptor antagonists. In aggregate, our results fail to support the hypothesis that TRPV4 in airway smooth muscle cells regulates airway contractility short term. Rather, we provide pharmacological evidence that TRPV4 activation causes human airway constriction that is entirely dependent upon the production of cysteinyl leukotrienes. Together, these data identify a novel mechanism by which TRPV4 activation may contribute to pathologic remodeling and inflammation, in addition to airflow obstruction, in the diseased human respiratory tract.
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Affiliation(s)
- M Allen McAlexander
- Respiratory Therapy Area, GlaxoSmithKline Pharmaceuticals, King of Prussia, Pennsylvania (M.A.M., M.A.L., G.E.H.); and Johns Hopkins Medical Institutions, Johns Hopkins University, Baltimore, Maryland (B.J.U.)
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45
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Paddenberg R, Mermer P, Goldenberg A, Kummer W. Videomorphometric analysis of hypoxic pulmonary vasoconstriction of intra-pulmonary arteries using murine precision cut lung slices. J Vis Exp 2014:e50970. [PMID: 24458260 PMCID: PMC4089409 DOI: 10.3791/50970] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Acute alveolar hypoxia causes pulmonary vasoconstriction (HPV) - also known as von Euler-Liljestrand mechanism - which serves to match lung perfusion to ventilation. Up to now, the underlying mechanisms are not fully understood. The major vascular segment contributing to HPV is the intra-acinar artery. This vessel section is responsible for the blood supply of an individual acinus, which is defined as the portion of lung distal to a terminal bronchiole. Intra-acinar arteries are mostly located in that part of the lung that cannot be selectively reached by a number of commonly used techniques such as measurement of the pulmonary artery pressure in isolated perfused lungs or force recordings from dissected proximal pulmonary artery segments(1,2). The analysis of subpleural vessels by real-time confocal laser scanning luminescence microscopy is limited to vessels with up to 50 µm in diameter(3). We provide a technique to study HPV of murine intra-pulmonary arteries in the range of 20-100 µm inner diameters. It is based on the videomorphometric analysis of cross-sectioned arteries in precision cut lung slices (PCLS). This method allows the quantitative measurement of vasoreactivity of small intra-acinar arteries with inner diameter between 20-40 µm which are located at gussets of alveolar septa next to alveolar ducts and of larger pre-acinar arteries with inner diameters between 40-100 µm which run adjacent to bronchi and bronchioles. In contrast to real-time imaging of subpleural vessels in anesthetized and ventilated mice, videomorphometric analysis of PCLS occurs under conditions free of shear stress. In our experimental model both arterial segments exhibit a monophasic HPV when exposed to medium gassed with 1% O2 and the response fades after 30-40 min at hypoxia.
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Affiliation(s)
| | - Petra Mermer
- Institute of Anatomy and Cell Biology, Justus-Liebig-University
| | - Anna Goldenberg
- Institute of Anatomy and Cell Biology, Justus-Liebig-University
| | - Wolfgang Kummer
- Institute of Anatomy and Cell Biology, Justus-Liebig-University
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Abstract
Live lung imaging has spanned the discovery of capillaries in the frog lung by Malpighi to the current use of single and multiphoton imaging of intravital and isolated perfused lung preparations incorporating fluorescent molecular probes and transgenic reporter mice. Along the way, much has been learned about the unique microcirculation of the lung, including immune cell migration and the mechanisms by which cells at the alveolar-capillary interface communicate with each other. In this review, we highlight live lung imaging techniques as applied to the role of mitochondria in lung immunity, mechanisms of signal transduction in lung compartments, studies on the composition of alveolar wall liquid, and neutrophil and platelet trafficking in the lung under homeostatic and inflammatory conditions. New applications of live lung imaging and the limitations of current techniques are discussed.
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Affiliation(s)
- Mark R. Looney
- Departments of Medicine and Laboratory Medicine, University of California, San Francisco, California 94143
| | - Jahar Bhattacharya
- Division of Pulmonary Allergy and Critical Care, Department of Medicine, and Department of Physiology & Cellular Biophysics, Columbia University College of Physicians & Surgeons, New York, New York 10032
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Säfholm J, Dahlén SE, Delin I, Maxey K, Stark K, Cardell LO, Adner M. PGE2 maintains the tone of the guinea pig trachea through a balance between activation of contractile EP1 receptors and relaxant EP2 receptors. Br J Pharmacol 2013; 168:794-806. [PMID: 22934927 DOI: 10.1111/j.1476-5381.2012.02189.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 07/23/2012] [Accepted: 08/20/2012] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE The guinea pig trachea (GPT) is commonly used in airway pharmacology. The aim of this study was to define the expression and function of EP receptors for PGE(2) in GPT as there has been ambiguity concerning their role. EXPERIMENTAL APPROACH Expression of mRNA for EP receptors and key enzymes in the PGE(2) pathway were assessed by real-time PCR using species-specific primers. Functional studies of GPT were performed in tissue organ baths. KEY RESULTS Expression of mRNA for the four EP receptors was found in airway smooth muscle. PGE(2) displayed a bell-shaped concentration-response curve, where the initial contraction was inhibited by the EP(1) receptor antagonist ONO-8130 and the subsequent relaxation by the EP(2) receptor antagonist PF-04418948. Neither EP(3) (ONO-AE5-599) nor EP(4) (ONO-AE3-208) selective receptor antagonists affected the response to PGE(2). Expression of COX-2 was greater than COX-1 in GPT, and the spontaneous tone was most effectively abolished by selective COX-2 inhibitors. Furthermore, ONO-8130 and a specific PGE(2) antibody eliminated the spontaneous tone, whereas the EP(2) antagonist PF-04418948 increased it. Antagonists of other prostanoid receptors had no effect on basal tension. The relaxant EP(2) response to PGE(2) was maintained after long-term culture, whereas the contractile EP(1) response showed homologous desensitization to PGE(2), which was prevented by COX-inhibitors. CONCLUSIONS AND IMPLICATIONS Endogenous PGE(2), synthesized predominantly by COX-2, maintains the spontaneous tone of GPT by a balance between contractile EP(1) receptors and relaxant EP(2) receptors. The model may be used to study interactions between EP receptors.
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Affiliation(s)
- J Säfholm
- Unit for Experimental Asthma and Allergy Research, Centre for Allergy Research, The Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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Shinomiya S, Shibamoto T, Kurata Y, Kuda Y, Zhang W, Tanida M, Toga H. Nitric oxide and β(2)-adrenoceptor activation attenuate pulmonary vasoconstriction during anaphylactic hypotension in anesthetized BALB/c mice. Exp Lung Res 2013; 39:119-29. [PMID: 23442108 DOI: 10.3109/01902148.2013.768720] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Systemic anaphylaxis accompanies pulmonary vasoconstriction and bronchoconstriction, which may contribute to increased right heart afterload, and finally anaphylactic hypotension. However, the pulmonary response to anaphylaxis is not known in mice. We determined the pulmonary vascular and bronchial response to systemic anaphylaxis in anesthetized BALB/c mice. We also clarified the roles of β-adrenoceptors, nitric oxide, and cyclooxygenase metabolites in these responses. Anaphylaxis was induced by an intravenous injection of the ovalbumin antigen into open-chest artificially ventilated sensitized mice. Mean arterial pressure, systolic pulmonary arterial pressure, central venous pressure, airway pressure, and aortic blood flow were continuously measured. In sensitized control mice, mean arterial pressure, and aortic blood flow substantially decreased soon after the antigen injection, while systolic pulmonary arterial pressure and airway pressure did not increase. In contrast, in mice pretreated with either the β(2)-adrenoceptor antagonist ICI 118,551 (0.2 mg/kg; n = 6), or L-NAME (50 mg/kg; n = 6), but not with the β(1)-adrenoceptor antagonist atenolol (2 mg/kg; n = 6) or indomethacin (5 mg/kg; n = 6), systolic pulmonary arterial pressure increased by 7 mmHg at 1.5 min after antigen. In L-NAME pretreated mice, pulmonary hypertension was sustained over 30 min of the experimental period. Airway pressure did not significantly change after antigen in any mice studied. In conclusion, pulmonary response to systemic anaphylaxis does not increase the right heart afterload and, therefore, may not contribute to the initial decrease in venous return and anaphylactic hypotension in anesthetized mice. β(2)-adrenoceptor activation and nitric oxide, but not β(1)-adrenoceptor activation or cyclooxygenase metabolites, attenuate the antigen-induced pulmonary vasoconstriction.
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Affiliation(s)
- Shohei Shinomiya
- Department of Respiratory Medicine, Kanazawa Medical University, Uchinada, Japan
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Yousefi OS, Wilhelm T, Maschke-Neuß K, Kuhny M, Martin C, Molderings GJ, Kratz F, Hildenbrand B, Huber M. The 1,4-benzodiazepine Ro5-4864 (4-chlorodiazepam) suppresses multiple pro-inflammatory mast cell effector functions. Cell Commun Signal 2013; 11:13. [PMID: 23425659 PMCID: PMC3598916 DOI: 10.1186/1478-811x-11-13] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 02/16/2013] [Indexed: 11/25/2022] Open
Abstract
Activation of mast cells (MCs) can be achieved by the high-affinity receptor for IgE (FcεRI) as well as by additional receptors such as the lipopolysaccharide (LPS) receptor and the receptor tyrosine kinase Kit (stem cell factor [SCF] receptor). Thus, pharmacological interventions which stabilize MCs in response to different receptors would be preferable in diseases with pathological systemic MC activation such as systemic mastocytosis. 1,4-Benzodiazepines (BDZs) have been reported to suppress MC effector functions. In the present study, our aim was to analyze molecularly the effects of BDZs on MC activation by comparison of the effects of the two BDZs Ro5-4864 and clonazepam, which markedly differ in their affinities for the archetypical BDZ recognition sites, i.e., the GABAA receptor and TSPO (previously termed peripheral-type BDZ receptor). Ro5-4864 is a selective agonist at TSPO, whereas clonazepam is a selective agonist at the GABAA receptor. Ro5-4864 suppressed pro-inflammatory MC effector functions in response to antigen (Ag) (degranulation/cytokine production) and LPS and SCF (cytokine production), whereas clonazepam was inactive. Signaling pathway analyses revealed inhibitory effects of Ro5-4864 on Ag-triggered production of reactive oxygen species, calcium mobilization and activation of different downstream kinases. The initial activation of Src family kinases was attenuated by Ro5-4864 offering a molecular explanation for the observed impacts on various downstream signaling elements. In conclusion, BDZs structurally related to Ro5-4864 might serve as multifunctional MC stabilizers without the sedative effect of GABAA receptor-interacting BDZs.
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Affiliation(s)
- Omid Sascha Yousefi
- Medical Faculty, Institute of Biochemistry and Molecular Immunology, RWTH Aachen University, Pauwelsstr, 30, 52074, Aachen, Germany.
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50
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Mays LE, Ammon-Treiber S, Mothes B, Alkhaled M, Rottenberger J, Müller-Hermelink ES, Grimm M, Mezger M, Beer-Hammer S, von Stebut E, Rieber N, Nürnberg B, Schwab M, Handgretinger R, Idzko M, Hartl D, Kormann MSD. Modified Foxp3 mRNA protects against asthma through an IL-10-dependent mechanism. J Clin Invest 2013; 123:1216-28. [PMID: 23391720 DOI: 10.1172/jci65351] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Accepted: 12/11/2012] [Indexed: 12/17/2022] Open
Abstract
Chemically modified mRNA is capable of inducing therapeutic levels of protein expression while circumventing the threat of genomic integration often associated with viral vectors. We utilized this novel therapeutic tool to express the regulatory T cell transcription factor, FOXP3, in a time- and site-specific fashion in murine lung, in order to prevent allergic asthma in vivo. We show that modified Foxp3 mRNA rebalanced pulmonary T helper cell responses and protected from allergen-induced tissue inflammation, airway hyperresponsiveness, and goblet cell metaplasia in 2 asthma models. This protection was conferred following delivery of modified mRNA either before or after the onset of allergen challenge, demonstrating its potential as both a preventive and a therapeutic agent. Mechanistically, FOXP3 induction controlled Th2 and Th17 inflammation by regulating innate immune cell recruitment through an IL-10-dependent pathway. The protective effects of FOXP3 could be reversed by depletion of IL-10 or administration of recombinant IL-17A or IL-23. Delivery of Foxp3 mRNA to sites of inflammation may offer a novel, safe therapeutic tool for the treatment of allergic asthma and other diseases driven by an imbalance in helper T cell responses.
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Affiliation(s)
- Lauren E Mays
- Department of Pediatrics I-Pediatric Infectiology and Immunology, Translational Genomics and Gene Therapy, University of Tübingen, Tübingen, Germany
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