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Bader M, Steckelings UM, Alenina N, Santos RA, Ferrario CM. Alternative Renin-Angiotensin System. Hypertension 2024; 81:964-976. [PMID: 38362781 PMCID: PMC11023806 DOI: 10.1161/hypertensionaha.123.21364] [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] [Indexed: 02/17/2024]
Abstract
The renin-angiotensin system is the most important peptide hormone system in the regulation of cardiovascular homeostasis. Its classical arm consists of the enzymes, renin, and angiotensin-converting enzyme, generating angiotensin II from angiotensinogen, which activates its AT1 receptor, thereby increasing blood pressure, retaining salt and water, and inducing cardiovascular hypertrophy and fibrosis. However, angiotensin II can also activate a second receptor, the AT2 receptor. Moreover, the removal of the C-terminal phenylalanine from angiotensin II by ACE2 (angiotensin-converting enzyme 2) yields angiotensin-(1-7), and this peptide interacts with its receptor Mas. When the aminoterminal Asp of angiotensin-(1-7) is decarboxylated, alamandine is generated, which activates the Mas-related G-protein-coupled receptor D, MrgD (Mas-related G-protein-coupled receptor type D). Since Mas, MrgD, and the AT2 receptor have opposing effects to the classical AT1 receptor, they and the enzymes and peptides activating them are called the alternative or protective arm of the renin-angiotensin system. This review will cover the historical aspects and the current standing of this recent addition to the biology of the renin-angiotensin system.
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Affiliation(s)
- Michael Bader
- Max-Delbrück-Center for Molecular Medicine (MDC), Berlin, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Berlin, Berlin, Germany
- Charité - University Medicine, Berlin, Germany
- Institute for Biology, University of Lübeck, Lübeck, Germany
| | - U. Muscha Steckelings
- Institute for Molecular Medicine, Dept. of Cardiovascular & Renal Research, University of Southern Denmark, Odense, Denmark
| | - Natalia Alenina
- Max-Delbrück-Center for Molecular Medicine (MDC), Berlin, Germany
- DZHK (German Center for Cardiovascular Research), Partner Site Berlin, Berlin, Germany
| | - Robson A.S. Santos
- National Institute of Science and Technology in Nanobiopharmaceutics (Nanobiofar) - Department of Physiology and Biophysics, Institute of Biological Sciences - Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Carlos M. Ferrario
- Laboratory of Translational Hypertension, Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC 27157, USA
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2
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Clark CR, Khalil RA. Regulation of vascular angiotensin II type 1 and type 2 receptor and angiotensin-(1-7)/MasR signaling in normal and hypertensive pregnancy. Biochem Pharmacol 2024; 220:115963. [PMID: 38061417 DOI: 10.1016/j.bcp.2023.115963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 01/01/2024]
Abstract
Normal pregnancy (Norm-Preg) is associated with a slight reduction in blood pressure (BP) and decreased BP response to vasoconstrictor stimuli such as angiotensin II (Ang II), although the renin-angiotensin-aldosterone system (RAAS) is upregulated. Preeclampsia (PE) is a complication of pregnancy manifested as hypertension-in-pregnancy (HTN-Preg), and dysregulation of angiotensin biosynthesis and signaling have been implicated. Ang II activates vascular Ang II type-1 receptor (AT1R) and Ang II type-2 receptor (AT2R), while angiotensin-(1-7) promotes Ang-(1-7)/MasR signaling. The role of AT1R in vasoconstriction and the activated cellular mechanisms are well-characterized. The sensitivity of vascular AT1R to Ang II and consequent activation of vasoconstrictor mechanisms decrease during Norm-Preg, but dramatically increase in HTN-Preg. Placental ischemia in late pregnancy could also initiate the release of AT1R agonistic autoantibodies (AT1AA) with significant impact on endothelial dysfunction and activation of contraction pathways in vascular smooth muscle including [Ca2+]c and protein kinase C. On the other hand, the role of AT2R and Ang-(1-7)/MasR in vascular relaxation, particularly during Norm-Preg and PE, is less clear. During Norm-Preg, increases in the expression/activity of vascular AT2R and Ang-(1-7)/MasR promote the production of endothelium-derived relaxing factors such as nitric oxide (NO), prostacyclin and endothelium-derived hyperpolarizing factor leading to generalized vasodilation. Aortic segments of Preg rats show prominent endothelial AT2R staining and increased relaxation and NO production in response to AT2R agonist CGP42112A, and treatment with AT2R antagonist PD123319 enhances phenylephrine-induced contraction. Decreased vascular AT2R and Ang-(1-7)/MasR expression and receptor-mediated mechanisms of vascular relaxation have been suggested in HTN-Preg animal models, but their role in human PE needs further testing. Changes in angiotensin-converting enzyme-2 (ACE2) have been observed in COVID-19 patients, and whether ACE2 influences the course of COVID-19 viral infection/immunity in Norm-Preg and PE is an intriguing area for research.
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Affiliation(s)
- Caroline R Clark
- Vascular Surgery Research Laboratories, Division of Vascular and Endovascular Surgery, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115, USA
| | - Raouf A Khalil
- Vascular Surgery Research Laboratories, Division of Vascular and Endovascular Surgery, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA 02115, USA.
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3
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Guimarães JPT, Queiroz LAD, Menikdiwela KR, Pereira N, Ramalho T, Jancar S, Moustaid-Moussa N, Martins JO. The role of captopril in leukotriene deficient type 1 diabetic mice. Sci Rep 2023; 13:22105. [PMID: 38092813 PMCID: PMC10719306 DOI: 10.1038/s41598-023-49449-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 12/08/2023] [Indexed: 12/17/2023] Open
Abstract
T1D can be associated with metabolic disorders and several impaired pathways, including insulin signaling, and development of insulin resistance through the renin-angiotensin system (RAS). The main precursor of RAS is angiotensinogen (Agt) and this system is often linked to autophagy dysregulation. Dysregulated autophagy has been described in T1D and linked to impairments in both glucose metabolism, and leukotrienes (LTs) production. Here, we have investigated the role of RAS and LTs in both muscle and liver from T1D mice, and its effects on insulin and autophagy pathways. We have chemically induced T1D in 129sve and 129sve 5LO-/- mice (lacking LTs) with streptozotocin (STZ). To further inhibit ACE activity, mice were treated with captopril (Cap). In muscle of T1D mice, treatment with Cap increased the expression of RAS (angiotensinogen and angiotensin II receptor), insulin signaling, and autophagy markers, regardless of the genotype. In the liver of T1D mice, the treatment with Cap increased the expression of RAS and insulin signaling markers, mostly when LTs were absent. 5LO-/- T1D mice showed increased insulin sensitivity, and decreased NEFA, after the Cap treatment. Cap treatment impacted both insulin signaling and autophagy pathways at the mRNA levels in muscle and liver, indicating the potential role of ACE inhibition on insulin sensitivity and autophagy in T1D.
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Affiliation(s)
- João Pedro Tôrres Guimarães
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, SP, Brazil
- Laboratory of Nutrigenomics, Inflammation and Obesity Research, Department of Nutritional Sciences, and Obesity Research Institute, Texas Tech University (TTU), Lubbock, TX, USA
- Laboratory of Immunopharmacology, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo (ICB/USP), São Paulo, SP, Brazil
| | - Luiz A D Queiroz
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, SP, Brazil
| | - Kalhara R Menikdiwela
- Laboratory of Nutrigenomics, Inflammation and Obesity Research, Department of Nutritional Sciences, and Obesity Research Institute, Texas Tech University (TTU), Lubbock, TX, USA
- Department of Nutritional Sciences, Rutgers University, New Brunswick, NJ, USA
| | - Nayara Pereira
- Laboratory of Immunopharmacology, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo (ICB/USP), São Paulo, SP, Brazil
- Department of Pharmacology, Ribeirão Preto Medical School (FMRP/USP), Ribeirão Preto, SP, Brazil
| | - Theresa Ramalho
- Laboratory of Immunopharmacology, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo (ICB/USP), São Paulo, SP, Brazil
- Department of Molecular Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Sonia Jancar
- Laboratory of Immunopharmacology, Department of Immunology, Institute of Biomedical Sciences, University of São Paulo (ICB/USP), São Paulo, SP, Brazil
| | - Naima Moustaid-Moussa
- Laboratory of Nutrigenomics, Inflammation and Obesity Research, Department of Nutritional Sciences, and Obesity Research Institute, Texas Tech University (TTU), Lubbock, TX, USA.
| | - Joilson O Martins
- Laboratory of Immunoendocrinology, School of Pharmaceutical Sciences, Department of Clinical and Toxicological Analyses, University of São Paulo, São Paulo, SP, Brazil.
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4
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Renal Denervation Influences Angiotensin II Types 1 and 2 Receptors. Int J Nephrol 2022; 2022:8731357. [PMID: 36262553 PMCID: PMC9576444 DOI: 10.1155/2022/8731357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Revised: 09/05/2022] [Accepted: 09/12/2022] [Indexed: 11/17/2022] Open
Abstract
The sympathetic and renin-angiotensin systems (RAS) are two critical regulatory systems in the kidney which affect renal hemodynamics and function. These two systems interact with each other so that angiotensin II (Ang II) has the presynaptic effect on the norepinephrine secretion. Another aspect of this interaction is that the sympathetic nervous system affects the function and expression of local RAS receptors, mainly Ang II receptors. Therefore, in many pathological conditions associated with an increased renal sympathetic tone, these receptors' expression changes and renal denervation can normalize these changes and improve the diseases. It seems that the renal sympathectomy can alter Ang II receptors expression and the distribution of RAS receptors in the kidneys, which influence renal functions.
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5
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Quarleri J, Delpino MV. SARS-CoV-2 interacts with renin-angiotensin system: impact on the central nervous system in elderly patients. GeroScience 2022; 44:547-565. [PMID: 35157210 PMCID: PMC8853071 DOI: 10.1007/s11357-022-00528-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/08/2022] [Indexed: 01/18/2023] Open
Abstract
SARS-CoV-2 is a recently identified coronavirus that causes the current pandemic disease known as COVID-19. SARS-CoV-2 uses angiotensin-converting enzyme 2 (ACE2) as a receptor, suggesting that the initial steps of SARS-CoV-2 infection may have an impact on the renin-angiotensin system (RAS). Several processes are influenced by RAS in the brain. The neurological symptoms observed in COVID-19 patients, including reduced olfaction, meningitis, ischemic stroke, cerebral thrombosis, and delirium, could be associated with RAS imbalance. In this review, we focus on the potential role of disturbances in the RAS as a cause for central nervous system sequelae of SARS-CoV-2 infection in elderly patients.
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Affiliation(s)
- Jorge Quarleri
- Instituto de Investigaciones Biomédicas en Retrovirus Y Sida (INBIRS), Universidad de Buenos Aires-CONICET, Paraguay 2155-Piso 11 (1121), Buenos Aires, Argentina.
| | - M Victoria Delpino
- Instituto de Investigaciones Biomédicas en Retrovirus Y Sida (INBIRS), Universidad de Buenos Aires-CONICET, Paraguay 2155-Piso 11 (1121), Buenos Aires, Argentina.
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Cenko E, Badimon L, Bugiardini R, Claeys MJ, De Luca G, de Wit C, Derumeaux G, Dorobantu M, Duncker DJ, Eringa EC, Gorog DA, Hassager C, Heinzel FR, Huber K, Manfrini O, Milicic D, Oikonomou E, Padro T, Trifunovic-Zamaklar D, Vasiljevic-Pokrajcic Z, Vavlukis M, Vilahur G, Tousoulis D. Cardiovascular disease and COVID-19: a consensus paper from the ESC Working Group on Coronary Pathophysiology & Microcirculation, ESC Working Group on Thrombosis and the Association for Acute CardioVascular Care (ACVC), in collaboration with the European Heart Rhythm Association (EHRA). Cardiovasc Res 2021; 117:2705-2729. [PMID: 34528075 PMCID: PMC8500019 DOI: 10.1093/cvr/cvab298] [Citation(s) in RCA: 74] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/10/2021] [Indexed: 01/08/2023] Open
Abstract
The cardiovascular system is significantly affected in coronavirus disease-19 (COVID-19). Microvascular injury, endothelial dysfunction, and thrombosis resulting from viral infection or indirectly related to the intense systemic inflammatory and immune responses are characteristic features of severe COVID-19. Pre-existing cardiovascular disease and viral load are linked to myocardial injury and worse outcomes. The vascular response to cytokine production and the interaction between severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) and angiotensin-converting enzyme 2 receptor may lead to a significant reduction in cardiac contractility and subsequent myocardial dysfunction. In addition, a considerable proportion of patients who have been infected with SARS-CoV-2 do not fully recover and continue to experience a large number of symptoms and post-acute complications in the absence of a detectable viral infection. This conditions often referred to as 'post-acute COVID-19' may have multiple causes. Viral reservoirs or lingering fragments of viral RNA or proteins contribute to the condition. Systemic inflammatory response to COVID-19 has the potential to increase myocardial fibrosis which in turn may impair cardiac remodelling. Here, we summarize the current knowledge of cardiovascular injury and post-acute sequelae of COVID-19. As the pandemic continues and new variants emerge, we can advance our knowledge of the underlying mechanisms only by integrating our understanding of the pathophysiology with the corresponding clinical findings. Identification of new biomarkers of cardiovascular complications, and development of effective treatments for COVID-19 infection are of crucial importance.
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Affiliation(s)
- Edina Cenko
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Via Giuseppe Massarenti 9, 40134 Bologna, Italy
| | - Lina Badimon
- Cardiovascular Program ICCC-Research Institute Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, CiberCV, Barcelona, Spain
| | - Raffaele Bugiardini
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Via Giuseppe Massarenti 9, 40134 Bologna, Italy
| | - Marc J Claeys
- Department of Cardiology, University Hospital Antwerp, Edegem, Belgium
| | - Giuseppe De Luca
- Cardiovascular Department of Cardiology, Ospedale “Maggiore della Carità”, Eastern Piedmont University, Novara, Italy
| | - Cor de Wit
- Institut für Physiologie, Universität zu Lübeck, Lübeck, Germany
- Deutsches Zentrum für Herz-Kreislauf-Forschung (DZHK) e.V. (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Lübeck, Germany
| | - Geneviève Derumeaux
- IMRB U955, UPEC, Créteil, France
- Department of Physiology, AP-HP, Henri-Mondor Teaching Hospital, Créteil, France
- Fédération Hospitalo-Universitaire « SENEC », Créteil, France
| | - Maria Dorobantu
- “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
| | - Dirk J Duncker
- Division of Experimental Cardiology, Department of Cardiology, Thoraxcenter, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Etto C Eringa
- Department of Physiology, Amsterdam Cardiovascular Science Institute, Amsterdam University Medical Centres, Amsterdam, The Netherlands
- Department of Physiology, Maastricht University, Cardiovascular Research Institute Maastricht (CARIM), Maastricht, The Netherlands
| | - Diana A Gorog
- Faculty of Medicine, National Heart and Lung Institute, Imperial College, London, UK
- Department of Postgraduate Medicine, University of Hertfordshire, Hatfield, UK
| | - Christian Hassager
- Department of Cardiology, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Frank R Heinzel
- Department of Cardiology, Charité-Universitaetsmedizin Berlin, Campus Virchow-Klinikum, Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
- Berlin Institute of Health, Berlin, Germany
| | - Kurt Huber
- 3rd Medical Department, Cardiology and Intensive Care Medicine, Wilhelminen Hospital, Vienna, Austria
- Medical School, Sigmund Freud University, Vienna, Austria
| | - Olivia Manfrini
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, Via Giuseppe Massarenti 9, 40134 Bologna, Italy
| | - Davor Milicic
- Department of Cardiovascular Diseases, University Hospital Centre Zagreb, University of Zagreb, Zagreb, Croatia
| | - Evangelos Oikonomou
- Department of Cardiology, ‘Hippokration’ General Hospital, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
| | - Teresa Padro
- Cardiovascular Program ICCC-Research Institute Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, CiberCV, Barcelona, Spain
| | - Danijela Trifunovic-Zamaklar
- Cardiology Department, Clinical Centre of Serbia, Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | | | - Marija Vavlukis
- University Clinic of Cardiology, Medical Faculty, Ss' Cyril and Methodius University in Skopje, Skopje, Republic of Macedonia
| | - Gemma Vilahur
- Cardiovascular Program ICCC-Research Institute Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, CiberCV, Barcelona, Spain
| | - Dimitris Tousoulis
- Department of Cardiology, ‘Hippokration’ General Hospital, National and Kapodistrian University of Athens, School of Medicine, Athens, Greece
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7
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Kheraldine H, Rachid O, Habib AM, Al Moustafa AE, Benter IF, Akhtar S. Emerging innate biological properties of nano-drug delivery systems: A focus on PAMAM dendrimers and their clinical potential. Adv Drug Deliv Rev 2021; 178:113908. [PMID: 34390777 DOI: 10.1016/j.addr.2021.113908] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/17/2021] [Accepted: 07/26/2021] [Indexed: 02/06/2023]
Abstract
Drug delivery systems or vectors are usually needed to improve the bioavailability and effectiveness of a drug through improving its pharmacokinetics/pharmacodynamics at an organ, tissue or cellular level. However, emerging technologies with sensitive readouts as well as a greater understanding of physiological/biological systems have revealed that polymeric drug delivery systems are not biologically inert but can have innate or intrinsic biological actions. In this article, we review the emerging multiple innate biological/toxicological properties of naked polyamidoamine (PAMAM) dendrimer delivery systems in the absence of any drug cargo and discuss their correlation with the defined physicochemical properties of PAMAMs in terms of molecular size (generation), architecture, surface charge and chemistry. Further, we assess whether any of the reported intrinsic biological actions of PAMAMs such as their antimicrobial activity or their ability to sequester glucose and modulate key protein interactions or cell signaling pathways, can be exploited clinically such as in the treatment of diabetes and its complications.
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8
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Shraim BA, Moursi MO, Benter IF, Habib AM, Akhtar S. The Role of Epidermal Growth Factor Receptor Family of Receptor Tyrosine Kinases in Mediating Diabetes-Induced Cardiovascular Complications. Front Pharmacol 2021; 12:701390. [PMID: 34408653 PMCID: PMC8365470 DOI: 10.3389/fphar.2021.701390] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 07/14/2021] [Indexed: 12/15/2022] Open
Abstract
Diabetes mellitus is a major debilitating disease whose global incidence is progressively increasing with currently over 463 million adult sufferers and this figure will likely reach over 700 million by the year 2045. It is the complications of diabetes such as cardiovascular, renal, neuronal and ocular dysfunction that lead to increased patient morbidity and mortality. Of these, cardiovascular complications that can result in stroke and cardiomyopathies are 2- to 5-fold more likely in diabetes but the underlying mechanisms involved in their development are not fully understood. Emerging research suggests that members of the Epidermal Growth Factor Receptor (EGFR/ErbB/HER) family of tyrosine kinases can have a dual role in that they are beneficially required for normal development and physiological functioning of the cardiovascular system (CVS) as well as in salvage pathways following acute cardiac ischemia/reperfusion injury but their chronic dysregulation may also be intricately involved in mediating diabetes-induced cardiovascular pathologies. Here we review the evidence for EGFR/ErbB/HER receptors in mediating these dual roles in the CVS and also discuss their potential interplay with the Renin-Angiotensin-Aldosterone System heptapeptide, Angiotensin-(1-7), as well the arachidonic acid metabolite, 20-HETE (20-hydroxy-5, 8, 11, 14-eicosatetraenoic acid). A greater understanding of the multi-faceted roles of EGFR/ErbB/HER family of tyrosine kinases and their interplay with other key modulators of cardiovascular function could facilitate the development of novel therapeutic strategies for treating diabetes-induced cardiovascular complications.
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Affiliation(s)
- Bara A Shraim
- College of Medicine, QU Health, Qatar University, Doha, Qatar.,Biomedical and Pharmaceutical Research Unit, QU Health, Qatar University, Doha, Qatar
| | - Moaz O Moursi
- College of Medicine, QU Health, Qatar University, Doha, Qatar.,Biomedical and Pharmaceutical Research Unit, QU Health, Qatar University, Doha, Qatar
| | - Ibrahim F Benter
- Faculty of Medicine, Eastern Mediterranean University, Famagusta, North Cyprus
| | - Abdella M Habib
- College of Medicine, QU Health, Qatar University, Doha, Qatar.,Biomedical and Pharmaceutical Research Unit, QU Health, Qatar University, Doha, Qatar
| | - Saghir Akhtar
- College of Medicine, QU Health, Qatar University, Doha, Qatar.,Biomedical and Pharmaceutical Research Unit, QU Health, Qatar University, Doha, Qatar
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9
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ACE2 interaction with cytoplasmic PDZ protein enhances SARS-CoV-2 invasion. iScience 2021; 24:102770. [PMID: 34189428 PMCID: PMC8223119 DOI: 10.1016/j.isci.2021.102770] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/23/2021] [Accepted: 06/21/2021] [Indexed: 12/26/2022] Open
Abstract
SARS-CoV-2 is responsible for the global COVID-19 pandemic. Angiotensin converting enzyme 2 (ACE2) is the membrane-delimited receptor for SARS-CoV-2. Lung, intestine, and kidney, major sites of viral infection, express ACE2 that harbors an intracellular, carboxy-terminal PDZ-recognition motif. These organs prominently express the PDZ protein Na+/H+ exchanger regulatory factor-1 (NHERF1). Here, we report NHERF1 tethers ACE2 and augments SARS-CoV-2 cell entry. ACE2 directly binds both NHERF1 PDZ domains. Disruption of either NHERF1 PDZ core-binding motif or the ACE2 PDZ recognition sequence eliminates interaction. Proximity ligation assays establish that ACE2 and NHERF1 interact at constitutive expression levels in human lung and intestine cells. Ablating ACE2 interaction with NHERF1 accelerated SARS-CoV-2 cell entry. Conversely, elimination of the ACE2 C-terminal PDZ-binding motif decreased ACE2 membrane residence and reduced pseudotyped virus entry. We conclude that the PDZ interaction of ACE2 with NHERF1 facilitates SARS-CoV-2 internalization. β-Arrestin is likely indispensable, as with G protein-coupled receptors. The SARS-CoV-2 receptor ACE2 C-terminal PDZ-recognition motif 802QTSF805 binds to NHERF1 NHERF1 and ACE2 interact directly in SARS-CoV-2-susceptible lung and intestine cells NHERF1 expression correlates with SARS-CoV-2 entry by regulating ACE2 membrane abundance β-Arrestins may cooperate with NHERF1 to promote ACE2-mediated SARS-CoV-2 cell entry
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10
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Ferrario CM, Groban L, Wang H, Cheng CP, VonCannon JL, Wright KN, Sun X, Ahmad S. The Angiotensin-(1-12)/Chymase axis as an alternate component of the tissue renin angiotensin system. Mol Cell Endocrinol 2021; 529:111119. [PMID: 33309638 PMCID: PMC8127338 DOI: 10.1016/j.mce.2020.111119] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 11/18/2020] [Accepted: 12/06/2020] [Indexed: 02/08/2023]
Abstract
The identification of an alternate extended form of angiotensin I composed of the first twelve amino acids at the N-terminal of angiotensinogen has generated new knowledge of the importance of noncanonical mechanisms for renin independent generation of angiotensins. The human sequence of the dodecapeptide angiotensin-(1-12) [N-Asp1-Arg2-Val3-Tyr4-Ile5-His6-Pro7-Phe8-His9-Leu10-Val1-Ile12-COOH] is an endogenous substrate that in the rat has been documented to be present in multiple organs including the heart, brain, kidney, gut, adrenal gland, and the bone marrow. Newer studies have confirmed the existence of Ang-(1-12) as an Ang II-forming substrate in the blood and heart of normal and diseased patients. Studies to-date document that angiotensin II generation from angiotensin-(1-12) does not require renin participation while chymase rather than angiotensin converting enzyme shows high catalytic activity in converting this tissue substrate into angiotensin II directly.
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Affiliation(s)
- Carlos M Ferrario
- Department of Surgery and Physiology-Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA.
| | - Leanne Groban
- Department of Anesthesiology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Hao Wang
- Department of Anesthesiology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Che Ping Cheng
- Department of Internal Medicine, Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Jessica L VonCannon
- Department of Surgery and Physiology-Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Kendra N Wright
- Department of Surgery and Physiology-Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Xuming Sun
- Department of Anesthesiology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Sarfaraz Ahmad
- Department of Surgery and Physiology-Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA
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11
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de Miranda FS, Guimarães JPT, Menikdiwela KR, Mabry B, Dhakal R, Rahman RL, Moussa H, Moustaid-Moussa N. Breast cancer and the renin-angiotensin system (RAS): Therapeutic approaches and related metabolic diseases. Mol Cell Endocrinol 2021; 528:111245. [PMID: 33753205 DOI: 10.1016/j.mce.2021.111245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 03/09/2021] [Accepted: 03/15/2021] [Indexed: 12/12/2022]
Abstract
The Renin-Angiotensin System (RAS) is classically recognized for regulating blood pressure and fluid balance. Recently, this role has extended to other areas including inflammation, obesity, diabetes, as well as breast cancer. RAS components are expressed in normal and cancerous breast tissues, and downregulation of RAS inhibits metastasis, proliferation, angiogenesis, and desmoplasia in the tumor microenvironment. Therefore, RAS inhibitors (Angiotensin receptor blockers, ARBs, or angiotensin converting enzyme inhibitors, ACE-I) may be beneficial as preventive adjuvant therapies to thwart breast cancer development and improve outcomes, respectively. Given the beneficial effects of RAS inhibitors in metabolic diseases, which often co-exist in breast cancer patients, combining RAS inhibitors with other breast cancer therapies may enhance the effectiveness of current treatments. This review scrutinizes above associations, to advance our understanding of the role of RAS in breast cancer and its potential for repurposing of RAS inhibitors to improve the therapeutic approach for breast cancer patients.
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Affiliation(s)
- Flávia Sardela de Miranda
- Laboratory of Nutrigenomics, Inflammation and Obesity Research, Department of Nutritional Sciences, Texas Tech University (TTU), Lubbock, TX, USA; Obesity Research Institute, Texas Tech University, Lubbock, TX, USA
| | - João Pedro Tôrres Guimarães
- Laboratory of Nutrigenomics, Inflammation and Obesity Research, Department of Nutritional Sciences, Texas Tech University (TTU), Lubbock, TX, USA; Obesity Research Institute, Texas Tech University, Lubbock, TX, USA; Laboratory of Immunopharmacology, Department of Immunology, Institute of Biomedical Sciences, University of Sao Paulo (ICB/USP), São Paulo, SP, Brazil; Laboratory of Immunoendocrinology, Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo (FCF/USP), São Paulo, SP, Brazil
| | - Kalhara R Menikdiwela
- Laboratory of Nutrigenomics, Inflammation and Obesity Research, Department of Nutritional Sciences, Texas Tech University (TTU), Lubbock, TX, USA; Obesity Research Institute, Texas Tech University, Lubbock, TX, USA
| | - Brennan Mabry
- Laboratory of Nutrigenomics, Inflammation and Obesity Research, Department of Nutritional Sciences, Texas Tech University (TTU), Lubbock, TX, USA
| | - Rabin Dhakal
- Department of Mechanical Engineering, Texas Tech University (TTU), Lubbock, TX, USA
| | - Rakhshanda Layeequr Rahman
- Department of Surgery, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Hanna Moussa
- Obesity Research Institute, Texas Tech University, Lubbock, TX, USA; Department of Mechanical Engineering, Texas Tech University (TTU), Lubbock, TX, USA
| | - Naima Moustaid-Moussa
- Laboratory of Nutrigenomics, Inflammation and Obesity Research, Department of Nutritional Sciences, Texas Tech University (TTU), Lubbock, TX, USA; Obesity Research Institute, Texas Tech University, Lubbock, TX, USA.
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12
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Gómez-Mendoza DP, Lara-Ribeiro AC, Verano-Braga T. Pathological cardiac remodeling seen by the eyes of proteomics. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2021; 1869:140622. [PMID: 33607275 DOI: 10.1016/j.bbapap.2021.140622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 12/26/2022]
Abstract
Cardiac remodeling involves cellular and structural changes that occur as consequence of multifactorial events to maintain the homeostasis. The progression of pathological cardiac remodeling involves a transition from adaptive to maladaptive changes that eventually leads to impairment of ventricular function and heart failure. In this scenario, proteins are key elements that orchestrate molecular events as increased expression of fetal genes, neurohormonal and second messengers' activation, contractile dysfunction, rearrangement of the extracellular matrix and alterations in heart geometry. Mass spectrometry based-proteomics has emerged as a sound method to study protein dysregulation and identification of cardiac diseases biomarkers in plasma. In this review, we summarize the main findings related to large-scale proteome modulation of cardiac cells and extracellular matrix occurred during pathological cardiac remodeling. We describe the recent proteomic progresses in the selection of protein targets and introduce the renin-angiotensin system as an interesting target for the treatment of pathological cardiac remodeling.
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Affiliation(s)
- Diana Paola Gómez-Mendoza
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, Brazil
| | - Ana Carolina Lara-Ribeiro
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, Brazil
| | - Thiago Verano-Braga
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte 31270-901, Brazil.
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13
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Cohall D, Ojeh N, Ferrario CM, Adams OP, Nunez-Smith M. Is hypertension in African-descent populations contributed to by an imbalance in the activities of the ACE2/Ang-(1-7)/Mas and the ACE/Ang II/AT 1 axes? J Renin Angiotensin Aldosterone Syst 2020; 21:1470320320908186. [PMID: 32089050 PMCID: PMC7036504 DOI: 10.1177/1470320320908186] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Introduction: Low plasma renin activity hypertension is prevalent in Afro-Caribbean
persons. Reduced angiotensin converting enzyme 2 activity from the counter
angiotensin converting enzyme 2 /angiotensin-(1-7)/Mas receptor axis of the
renin angiotensin aldosterone system has been reported in people with
pre-hypertension, type 2 diabetes mellitus and chronic renal disease. This
study investigates whether an imbalance in the regulatory mechanisms between
the pressor arm of the renin angiotensin aldosterone system (angiotensin
converting enzyme/angiotensin II/AT1 receptor) and the depressor axis
(angiotensin converting enzyme 2/angiotensin-(1-7)/Mas receptor) predisposes
persons of African descent to hypertension. Methods: In total, 30 normotensives and 30 recently diagnosed hypertensives aged 18–55
of Afro-Caribbean origin who are naïve to antihypertensive treatment will be
recruited from public sector polyclinics in Barbados. Demographic and
anthropometric data, clinical blood pressure readings, 24-hour urine
collections and venous blood samples will be collected. Biological samples
will be analysed for renin angiotensin aldosterone system peptide markers
using radioimmunoassay. Conclusion: We describe the design, methods and rationale for the characterization of
renin angiotensin aldosterone system mechanisms that may contribute to
hypertension predisposition in persons of African descent. Our findings will
characterize any imbalance in the counter axes of the renin angiotensin
aldosterone system in hypertensive Afro-Caribbeans with a potential view of
identifying novel approaches with the use of renin angiotensin aldosterone
system and mineralocorticoid blockers to manage the condition.
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Affiliation(s)
- Damian Cohall
- Faculty of Medical Sciences, The University of the West Indies, West Indies
| | - Nkemcho Ojeh
- Faculty of Medical Sciences, The University of the West Indies, West Indies
| | - Carlos M Ferrario
- Department of Surgery and Department of Physiology-Pharmacology, Wake Forest University, USA
| | - O Peter Adams
- Faculty of Medical Sciences, The University of the West Indies, West Indies
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14
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Affiliation(s)
- Carlos M Ferrario
- Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC, USA. .,Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA.
| | - Sarfaraz Ahmad
- Department of Surgery, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Leanne Groban
- Department of Anesthesiology, Wake Forest School of Medicine, Winston Salem, NC, USA
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15
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Ferrario CM, Ahmad S, Groban L. Twenty years of progress in angiotensin converting enzyme 2 and its link to SARS-CoV-2 disease. Clin Sci (Lond) 2020; 134:2645-2664. [PMID: 33063823 PMCID: PMC9055624 DOI: 10.1042/cs20200901] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/30/2020] [Accepted: 10/05/2020] [Indexed: 12/22/2022]
Abstract
The virulence of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and the aggressive nature of the disease has transformed the universal pace of research in the desperate attempt to seek effective therapies to halt the morbidity and mortality of this pandemic. The rapid sequencing of the SARS-CoV-2 virus facilitated identification of the receptor for angiotensin converting enzyme 2 (ACE2) as the high affinity binding site that allows virus endocytosis. Parallel evidence that coronavirus disease 2019 (COVID-19) disease evolution shows greater lethality in patients with antecedent cardiovascular disease, diabetes, or even obesity questioned the potential unfavorable contribution of angiotensin converting enzyme (ACE) inhibitors or angiotensin II (Ang II) receptor blockers as facilitators of adverse outcomes due to the ability of these therapies to augment the transcription of Ace2 with consequent increase in protein formation and enzymatic activity. We review, here, the specific studies that support a role of these agents in altering the expression and activity of ACE2 and underscore that the robustness of the experimental data is associated with weak clinical long-term studies of the existence of a similar regulation of tissue or plasma ACE2 in human subjects.
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Affiliation(s)
- Carlos M. Ferrario
- Departments of Surgery and Physiology-Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC 27157, U.S.A
| | - Sarfaraz Ahmad
- Department of Surgery, Wake Forest School of Medicine, Winston-Salem, NC 27157, U.S.A
| | - Leanne Groban
- Department of Anesthesiology, Wake Forest School of Medicine, Winston-Salem, NC 27157, U.S.A
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16
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Akhtar S, Benter IF, Danjuma MI, Doi SAR, Hasan SS, Habib AM. Pharmacotherapy in COVID-19 patients: a review of ACE2-raising drugs and their clinical safety. J Drug Target 2020; 28:683-699. [PMID: 32700580 DOI: 10.1080/1061186x.2020.1797754] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The COVID-19 pandemic is caused by the severe acute-respiratory-syndrome-coronavirus-2 that uses ACE2 as its receptor. Drugs that raise serum/tissue ACE2 levels include ACE inhibitors (ACEIs) and angiotensin-II receptor blockers (ARBs) that are commonly used in patients with hypertension, cardiovascular disease and/or diabetes. These comorbidities have adverse outcomes in COVID-19 patients that might result from pharmacotherapy. Increasing ACE2 could potentially increase the risk of infection, severity or mortality in COVID-19 or it might be protective as it forms angiotensin-(1-7) which exhibits anti-inflammatory/anti-oxidative effects and prevents diabetes- and/or hypertension-induced end-organ damage. Thus, there existed clinical uncertainty. Here, we review studies implicating 15 classes of drugs in increasing ACE2 levels in vivo and the available literature on the clinical safety of these drugs in COVID-19 patients. Further, in a re-analysis of clinical data from a meta-analysis of 9 studies, we show that ACEIs/ARBs usage was not associated with an increased risk of all-cause mortality. Literature suggests that ACEIs/ARBs usage generally appears to be clinically safe though their use in severe COVID-19 patients might increase the risk of acute renal injury. For definitive clarity, further clinical and mechanistic studies are needed in assessing the safety of all classes of ACE2 raising medications.
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Affiliation(s)
- Saghir Akhtar
- College of Medicine, QU Health, Qatar University, Doha, Qatar
| | - Ibrahim F Benter
- Faculty of Medicine, Eastern Mediterranean University, Famagusta, North Cyprus
| | - Mohammed I Danjuma
- College of Medicine, QU Health, Qatar University, Doha, Qatar.,Division of Internal Medicine, Hamad Medical Corporation Hospital, Doha, Qatar
| | - Suhail A R Doi
- College of Medicine, QU Health, Qatar University, Doha, Qatar
| | - Syed S Hasan
- School of Applied Sciences, University of Huddersfield, Huddersfield, UK
| | - Abdella M Habib
- College of Medicine, QU Health, Qatar University, Doha, Qatar
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17
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Hazra S, Chaudhuri AG, Tiwary BK, Chakrabarti N. Matrix metallopeptidase 9 as a host protein target of chloroquine and melatonin for immunoregulation in COVID-19: A network-based meta-analysis. Life Sci 2020; 257:118096. [PMID: 32679150 PMCID: PMC7361122 DOI: 10.1016/j.lfs.2020.118096] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/07/2020] [Accepted: 07/10/2020] [Indexed: 12/17/2022]
Abstract
AIMS The molecular pathogenesis of COVID-19 is similar to other coronavirus (CoV) infections viz. severe acute respiratory syndrome (SARS) in human. Due to scarcity of the suitable treatment strategy, the present study was undertaken to explore host protein(s) targeted by potent repurposed drug(s) in COVID-19. MATERIALS AND METHODS The differentially expressed genes (DEGs) were identified from microarray data repository of SARS-CoV patient blood. The repurposed drugs for COVID-19 were selected from available literature. Using DEGs and drugs, the protein-protein interaction (PPI) and chemo-protein interaction (CPI) networks were constructed and combined to develop an interactome model of PPI-CPI network. The top-ranked sub-network with its hub-bottleneck nodes were evaluated with their functional annotations. KEY FINDINGS A total of 120 DEGs and 65 drugs were identified. The PPI-CPI network (118 nodes and 293 edges) exhibited a top-ranked sub-network (35 nodes and 174 connectivities) with 12 hub-bottleneck nodes having two drugs chloroquine and melatonin in association with 10 proteins corresponding to six upregulated and four downregulated genes. Two drugs interacted directly with the hub-bottleneck node i.e. matrix metallopeptidase 9 (MMP9), a host protein corresponding to its upregulated gene. MMP9 showed functional annotations associated with neutrophil mediated immunoinflammation. Moreover, literature survey revealed that angiotensin converting enzyme 2, a membrane receptor of SARS-CoV-2 virus, might have functional cooperativity with MMP9 and a possible interaction with both drugs. SIGNIFICANCE The present study reveals that between chloroquine and melatonin, melatonin appears to be more promising repurposed drug against MMP9 for better immunocompromisation in COVID-19.
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Affiliation(s)
- Suvojit Hazra
- CPEPA-UGC Centre for "Electro-physiological and Neuro-imaging studies including Mathematical Modelling", University of Calcutta, Kolkata, West Bengal, India; Department of Physiology, University of Calcutta, Kolkata, West Bengal, India
| | | | - Basant K Tiwary
- Centre for Bioinformatics, School of Life Sciences, Pondicherry University, Pondicherry, India.
| | - Nilkanta Chakrabarti
- CPEPA-UGC Centre for "Electro-physiological and Neuro-imaging studies including Mathematical Modelling", University of Calcutta, Kolkata, West Bengal, India; Department of Physiology, University of Calcutta, Kolkata, West Bengal, India.
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18
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Escobales N, Nuñez RE, Javadov S. Mitochondrial angiotensin receptors and cardioprotective pathways. Am J Physiol Heart Circ Physiol 2019; 316:H1426-H1438. [PMID: 30978131 PMCID: PMC6620675 DOI: 10.1152/ajpheart.00772.2018] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 03/15/2019] [Accepted: 04/01/2019] [Indexed: 12/13/2022]
Abstract
A growing body of data provides strong evidence that intracellular angiotensin II (ANG II) plays an important role in mammalian cell function and is involved in the pathogenesis of human diseases such as hypertension, diabetes, inflammation, fibrosis, arrhythmias, and kidney disease, among others. Recent studies also suggest that intracellular ANG II exerts protective effects in cells during high extracellular levels of the hormone or during chronic stimulation of the local tissue renin-angiotensin system (RAS). Notably, the intracellular RAS (iRAS) described in neurons, fibroblasts, renal cells, and cardiomyocytes provided new insights into regulatory mechanisms mediated by intracellular ANG II type 1 (AT1Rs) and 2 (AT2Rs) receptors, particularly, in mitochondria and nucleus. For instance, ANG II through nuclear AT1Rs promotes protective mechanisms by stimulating the AT2R signaling cascade, which involves mitochondrial AT2Rs and Mas receptors. The stimulation of nuclear ANG II receptors enhances mitochondrial biogenesis through peroxisome proliferator-activated receptor-γ coactivator-1α and increases sirtuins activity, thus protecting the cell against oxidative stress. Recent studies in ANG II-induced preconditioning suggest that plasma membrane AT2R stimulation exerts protective effects against cardiac ischemia-reperfusion by modulating mitochondrial AT1R and AT2R signaling. These studies indicate that iRAS promotes the protection of cells through nuclear AT1R signaling, which, in turn, promotes AT2R-dependent processes in mitochondria. Thus, despite abundant data on the deleterious effects of intracellular ANG II, a growing body of studies also supports a protective role for iRAS that could be of relevance to developing new therapeutic strategies. This review summarizes and discusses previous studies on the role of iRAS, particularly emphasizing the protective and counterbalancing actions of iRAS, mitochondrial ANG II receptors, and their implications for organ protection.
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Affiliation(s)
- Nelson Escobales
- Department of Physiology, University of Puerto Rico School of Medicine , San Juan, Puerto Rico
| | - Rebeca E Nuñez
- Department of Physiology, University of Puerto Rico School of Medicine , San Juan, Puerto Rico
| | - Sabzali Javadov
- Department of Physiology, University of Puerto Rico School of Medicine , San Juan, Puerto Rico
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19
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de Souza-Neto FP, Carvalho Santuchi M, de Morais E Silva M, Campagnole-Santos MJ, da Silva RF. Angiotensin-(1-7) and Alamandine on Experimental Models of Hypertension and Atherosclerosis. Curr Hypertens Rep 2018. [PMID: 29541937 DOI: 10.1007/s11906-018-0798-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
PURPOSE OF REVIEW The purpose of this review was to summarize the current knowledge on the role of angiotensin-(1-7) [Ang-(1-7)] and alamandine in experimental hypertension and atherosclerosis. RECENT FINDINGS The renin-angiotensin system (RAS) is a very complex system, composed of a cascade of enzymes, peptides, and receptors, known to be involved in the pathogenesis of hypertension and atherosclerosis. Ang-(1-7), identified and characterized in 1987, and alamandine, discovered 16 years after, are the newest two main effector molecules from the RAS, protecting the vascular system against hypertension and atherosclerosis. While the beneficial effects of Ang-(1-7) have been widely studied in several experimental models of hypertension, much less studies were performed in experimental models of atherosclerosis. Alamandine has shown similar vascular effects to Ang-(1-7), namely, endothelial-dependent vasorelaxation mediated by nitric oxide and hypotensive effects in experimental hypertension. There are few studies on the effects of alamandine on atherosclerosis.
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Affiliation(s)
- Fernando Pedro de Souza-Neto
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos. 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Melissa Carvalho Santuchi
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos. 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Mario de Morais E Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos. 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Maria José Campagnole-Santos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos. 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Rafaela Fernandes da Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Av. Antônio Carlos. 6627, Pampulha, Belo Horizonte, MG, 31270-901, Brazil.
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20
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Yu HR, Tain YL, Tiao MM, Chen CC, Sheen JM, Lin IC, Li SW, Tsai CC, Lin YJ, Hsieh KS, Huang LT. Prenatal dexamethasone and postnatal high-fat diet have a synergistic effect of elevating blood pressure through a distinct programming mechanism of systemic and adipose renin-angiotensin systems. Lipids Health Dis 2018. [PMID: 29540174 PMCID: PMC5853160 DOI: 10.1186/s12944-018-0701-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background Hypertension may result from high-fat (HF) diet induced-obesity and overexposure to glucocorticoids in utero. Recent studies demonstrated the potent contribution of adipose tissue’s renin-angiotensin system (RAS) to systemic RAS, which plays a key role in regulating blood pressure (BP). In this study, we investigated the effects of prenatal dexamethasone (DEX) exposure and postnatal HF diet on RAS of adipose tissue. Methods RAS and BP of 6-month old rats exposed to prenatal DEX and/or postnatal HF diet were examined. Results Prenatal DEX plus postnatal HF exerted a synergistic effect on systolic BP. Prenatal DEX exposure suppressed plasma angiotensin (ANG) I and ANG II, whereas postnatal HF suppressed plasma ANG-(1–7) level. Prenatal DEX increased prorenin receptor and renin levels, but suppressed angiotensinogen (AGT) and angiotensin-converting-enzyme 1 (ACE1) mRNA expressions in adipose tissue. Postnatal HF increased AGT mRNA expression, but suppressed prorenin receptor, renin, ACE2, ANG II type 2 receptor (AT2R), and Mas receptor (MasR) mRNA expression levels. Conclusions Prenatal GC exposure altered the ACE1/ANG II/ANG II type 1 receptor (AT1R) axis, whereas postnatal HF negatively impacted the ACE2/ANG-(1–7)/MasR axis. Prenatal DEX exposure and postnatal HF synergistically elevated BP through a distinct programming mechanism of systemic and adipose RAS. Adipose RAS might be a target for precise hypertension treatment. Electronic supplementary material The online version of this article (10.1186/s12944-018-0701-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hong-Ren Yu
- Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - You-Lin Tain
- Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Mao-Meng Tiao
- Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chih-Cheng Chen
- Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Jiunn-Ming Sheen
- Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - I-Chun Lin
- Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Shih-Wen Li
- Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Ching-Chou Tsai
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan
| | - Yu-Ju Lin
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan
| | - Kai-Sheng Hsieh
- Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Li-Tung Huang
- Department of Pediatrics, Chang Gung Memorial Hospital-Kaohsiung Medical Center, #123, Ta-Pei Road, Niao-Sung District, Kaohsiung, Taiwan. .,Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung, Taiwan.
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21
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Novel Cardiac Intracrine Mechanisms Based on Ang-(1-12)/Chymase Axis Require a Revision of Therapeutic Approaches in Human Heart Disease. Curr Hypertens Rep 2017; 19:16. [PMID: 28233239 DOI: 10.1007/s11906-017-0708-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
PURPOSE OF THE REVIEW Drugs targeting the renin-angiotensin system (RAS), namely angiotensin-converting enzyme (ACE) inhibitors and angiotensin receptor blockers, are the most commonly prescribed drugs for patients with or at risk for cardiovascular events. However, new treatment strategies aimed at mitigating the rise of the heart failure pandemic are warranted because clinical trials show that RAS blockers have limited benefits in halting disease progression. The main goal of this review is to put forward the concept of an intracrine RAS signaling through the novel angiotensin-(1-12)/chymase axis as the main source of deleterious angiotensin II (Ang II) in cardiac maladaptive remodeling leading to heart failure (HF). RECENT FINDINGS Expanding traditional knowledge, Ang II can be produced in tissues independently from the circulatory renin-angiotensin system. In the heart, angiotensin-(1-12) [Ang-(1-12)], a recently discovered derivative of angiotensinogen, is a precursor of Ang II, and chymase rather than ACE is the main enzyme contributing to the direct production of Ang II from Ang-(1-12). The Ang-(1-12)/chymase axis is an independent intracrine pathway accounting for the trophic, contractile, and pro-arrhythmic Ang II actions in the human heart. Ang-(1-12) expression and chymase activity have been found elevated in the left atrial appendage of heart disease subjects, suggesting a pivotal role of this axis in the progression of HF. Recent meta-analysis of large clinical trials on the use of ACE inhibitors and angiotensin receptor blockers in cardiovascular disease has demonstrated an imbalance between patients that significantly benefit from these therapeutic agents and those that remain at risk for heart disease progression. Looking to find an explanation, detailed investigation on the RAS has unveiled a previously unrecognized complexity of substrates and enzymes in tissues ultimately associated with the production of Ang II that may explain the shortcomings of ACE inhibition and angiotensin receptor blockade. Discovery of the Ang-(1-12)/chymase axis in human hearts, capable of producing Ang II independently from the circulatory RAS, has led to the notion that a tissue-delimited RAS signaling in an intracrine fashion may account for the deleterious effects of Ang II in the heart, contributing to the transition from maladaptive cardiac remodeling to heart failure. Targeting intracellular RAS signaling may improve current therapies aimed at reducing the burden of heart failure.
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22
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Kangussu LM, Almeida-Santos AF, Moreira FA, Fontes MA, Santos RA, Aguiar DC, Campagnole-Santos MJ. Reduced anxiety-like behavior in transgenic rats with chronically overproduction of angiotensin-(1–7): Role of the Mas receptor. Behav Brain Res 2017; 331:193-198. [DOI: 10.1016/j.bbr.2017.05.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/08/2017] [Accepted: 05/10/2017] [Indexed: 01/05/2023]
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23
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Zhang X, Cheng HJ, Zhou P, Kitzman DW, Ferrario CM, Li WM, Cheng CP. Cellular basis of angiotensin-(1-7)-induced augmentation of left ventricular functional performance in heart failure. Int J Cardiol 2017; 236:405-412. [PMID: 28096047 DOI: 10.1016/j.ijcard.2017.01.071] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 01/06/2017] [Indexed: 10/20/2022]
Abstract
BACKGROUND Angiotensin-(1-7) [Ang-(1-7)] exhibits cardiovascular effects opposite those of angiotensin II (Ang II), thus providing protection against heart disease. However, how Ang-(1-7) imparts cardioprotection is unclear, and its direct cardiac effects are controversial. Whether heart failure (HF) alters cardiac contractile responses to Ang-(1-7) remains undetermined. We tested the hypothesis that in HF, Ang-(1-7) may produce positive modulation on [Ca2+]i regulation, enhancing left ventricular (LV) and myocyte contraction and relaxation via Ang-(1-7) Mas receptor coupled with nitric oxide (NO)/bradykinin (BK)-mediated mechanism. METHODS AND RESULTS We measured LV contractility changes after Ang-(1-7) (650ng/kg, iv) and compared myocyte functional and [Ca2+]i transient ([Ca2+]iT) responses to Ang-(1-7) superfusion in 24 normal rats and 34 rats with isoproterenol-induced HF (3months after 170mg/kg, s.q. for 2days). To assess the mechanisms of altered HF responses to Ang-(1-7), subsets of HF myocytes were pretreated to inhibit NO synthase (L-NAME), BK (HOE-140), and Mas receptor (A-779) followed with Ang-(1-7). In normal rats, Ang-(1-7) produced no significant changes in LV and myocyte function. In HF rats, Ang-(1-7) significantly augmented LV contractility and relaxation with increased EES (51%), but decreased τ compared to baseline. Ang-(1-7) also significantly increased myocyte contraction (dL/dtmax, 30%), relaxation (dR/dtmax, 41%), and [Ca2+]iT. L-NAME increased, HOE-140 decreased, and A-779 prevented HF myocyte contractile responses to Ang-(1-7). CONCLUSIONS In a rat model of HF, Ang-(1-7) increases [Ca2+]iT, and produces positive inotropic and lusitropic effects in the LV and myocytes. These effects are mediated by the Mas receptor and involve activation of NO/BK pathways.
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Affiliation(s)
- Xiaowei Zhang
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Heng-Jie Cheng
- Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Peng Zhou
- Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Dalane W Kitzman
- Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Carlos M Ferrario
- Department of Surgery, Wake Forest School of Medicine, Winston-Salem, NC, United States; Department of Internal Medicine-Nephrology, Wake Forest School of Medicine, Winston-Salem, NC, United States; Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Wei-Min Li
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin, China.
| | - Che Ping Cheng
- Department of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin, China; Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, NC, United States.
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Anxiolytic- and antidepressant-like effects of angiotensin-(1–7) in hypertensive transgenic (mRen2)27 rats. Clin Sci (Lond) 2016; 130:1247-55. [DOI: 10.1042/cs20160116] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 04/19/2016] [Indexed: 01/03/2023]
Abstract
Angiotensin-(1–7) [Ang-(1–7)], a counter-regulatory peptide of the renin–angiotensin system (RAS) exerts its effects through the G-protein-coupled receptor Mas, which is expressed in different tissues, including the brain. Ang-(1–7) has a broad range of effects beyond the well-described cardiovascular and renal actions, including the modulation of emotional and behavioural responses. In the present study we tested the hypothesis that Ang-(1–7) could attenuate the anxiety- and depression-like behaviours observed in transgenic hypertensive (mRen2)27 rats (TGRs). We also hypothesized that Ang-(1–7) could be involved in the anxiolytic-like effect induced by ACE (angiotensin-converting enzyme) treatment in these hypertensive rats. Therefore, TGRs and Sprague–Dawley rats were subjected to the Elevated Plus Maze (EPM) test, Forced Swimming Test (FST) and Novelty Suppressed Feeding (NSF). TGRs presented a decreased percentage of entries in the open arms of the EPM test, a phenotype reversed by systemic treatment with enalapril or intracerebroventricular infusion of Ang-(1–7). It is interesting that pre-treatment with A779, a selective Mas receptor antagonist, prevented the anxiolytic-like effect induced by the ACE inhibitor. In the NSF test, TGRs showed increased latency to eating, an indicative of a higher aversion in response to a new environment. These animals also showed increased immobility in the FST. Again, Ang-(1–7) reversed this phenotype. Thus, our data showed that Ang-(1–7) can modulate anxiety- and depression-like behaviours in TGRs and warrant further investigation as a new therapy for certain psychiatric disorders.
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Zhou P, Cheng CP, Li T, Ferrario CM, Cheng HJ. Modulation of cardiac L-type Ca2+ current by angiotensin-(1-7): normal versus heart failure. Ther Adv Cardiovasc Dis 2015; 9:342-53. [PMID: 26082338 DOI: 10.1177/1753944715587424] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
OBJECTIVE Recent evidence has shown that, in heart failure (HF), clinically relevant concentrations of angiotensin-(1-7) [Ang-(1-7)] counteracts angiotensin II induced cardiac depression and produces positive inotropic effects in both left ventricle (LV) and myocytes. However, the underlying electrophysiological mechanism is unclear. We investigated the role and mechanism of Ang-(1-7) on LV myocyte L-type calcium current (ICa,L) responses in normal state and in HF. METHOD We compared the effect of Ang-(1-7) (10(-5) M) on ICa,L responses in isolated LV myocytes obtained from 11 rats with isoproterenol (ISO) induced HF (3 months after 170 mg/kg subcutaneous for 2 days) and from 8 age-matched normal control rats by patch clamp technique. RESULTS In normal myocytes, compared with baseline, superfusion of Ang-(1-7) caused no significant changes in ICa,L (8.2 ± 0.2 versus 8.0 ± 0.3 pA/pF, p= not significant). In HF myocytes, the baseline ICa,L was significantly reduced (5.3 ± 0.1 versus 8.0 ± 0.3 pA/pF, p < 0.01). Ang-(1-7) produced a 21% increase in ICa,L (6.4±0.1 versus 5.3±0.1 pA/pF, p < 0.01). Pretreatment of HF myocytes with a nitric oxide (NO) synthase inhibitor (L-NAME, 10(-5) M) resulted in a significantly greater increase in ICa,L (28%, 8.4 ± 0.1 versus 6.5 ± 0.1 pA/pF, p < 0.01) during Ang-(1-7) superfusion. In contrast, during incubation with the bradykinin (BK) inhibitor HOE 140 (10(-6) M), Ang-(1-7) induced increase in ICa,L was significantly decreased. The Ang-(1-7) induced increase in ICa,L was abolished by [D-Ala(7)]-Ang-(1-7) (A-779, 10(-5) M). CONCLUSIONS HF alters the response of ICa,L to Ang-(1-7). In normal myocytes, Ang-(1-7) has no significant effect on ICa,L. However, in HF myocytes, Ang-(1-7) increases ICa,L. These effects are mediated by the Ang-(1-7) Mas receptors and involve activation of NO/BK pathways.
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Affiliation(s)
- Peng Zhou
- Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Che Ping Cheng
- Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Tiankai Li
- Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USADepartment of Cardiology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Carlos M Ferrario
- Department of Surgery, Internal Medicine-Nephrology, and Physiology-Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Heng-Jie Cheng
- Section on Cardiovascular Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157-1045, USAInstitute for Regenerative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
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Kangussu LM, Guimaraes PS, Nadu AP, Melo MB, Santos RAS, Campagnole-Santos MJ. Activation of angiotensin-(1-7)/Mas axis in the brain lowers blood pressure and attenuates cardiac remodeling in hypertensive transgenic (mRen2)27 rats. Neuropharmacology 2015; 97:58-66. [PMID: 25983274 DOI: 10.1016/j.neuropharm.2015.04.036] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 04/20/2015] [Accepted: 04/30/2015] [Indexed: 11/27/2022]
Abstract
Activation of the peripheral angiotensin-(1-7)/Mas axis of the renin-angiotensin system produces important cardioprotective actions, counterbalancing the deleterious actions of an overactivity of Ang II/AT1 axis. In the present study we evaluated whether the chronic increase in Ang-(1-7) levels in the brain could ameliorate cardiac disorders observed in transgenic (mRen2)27 hypertensive rats through actions on Mas receptor. Sprague Dawley (SD) and transgenic (mRen2)27 hypertensive rats, instrumented with telemetry probe for arterial pressure (AP) measurement were subjected to 14 days of ICV infusion of Ang-(1-7) (200 ng/h) or Ang-(1-7) associated with Mas receptor antagonist (A779, 1 μg/h) or 0.9% sterile saline (0.5 μl/h) through osmotic mini-pumps. Ang-(1-7) infusion in (mRen2)27 rats reduced blood pressure, normalized the baroreflex control of HR, restored cardiac autonomic balance, reduced cardiac hypertrophy and pre-fibrotic alterations and decreased the altered imbalance of Ang II/Ang-(1-7) in the heart. In addition, there was an attenuation of the increased levels of atrial natriuretic peptide, brain natriuretic peptide, collagen I, fibronectin and TGF-β in the heart of (mRen2)27 rats. Furthermore, most of these effects were mediated in the brain by Mas receptor, since were blocked by its selective antagonist, A779. These data indicate that increasing Ang-(1-7) levels in the brain can attenuate cardiovascular disorders observed in (mRen2)27 hypertensive rats, probably by improving the autonomic balance to the heart due to centrally-mediated actions on Mas receptor.
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Affiliation(s)
- Lucas M Kangussu
- Laboratory of Hypertension, Department of Physiology and Biophysics, Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Priscila S Guimaraes
- Laboratory of Hypertension, Department of Physiology and Biophysics, Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ana Paula Nadu
- Laboratory of Hypertension, Department of Physiology and Biophysics, Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Marcos B Melo
- Laboratory of Hypertension, Department of Physiology and Biophysics, Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Robson A S Santos
- Laboratory of Hypertension, Department of Physiology and Biophysics, Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Maria Jose Campagnole-Santos
- Laboratory of Hypertension, Department of Physiology and Biophysics, Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
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Angiotensin-(1-7) augments endothelium-dependent relaxations of porcine coronary arteries to bradykinin by inhibiting angiotensin-converting enzyme 1. J Cardiovasc Pharmacol 2014; 63:453-60. [PMID: 24390175 DOI: 10.1097/fjc.0000000000000069] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Angiotensin-converting enzyme 2 (ACE2) converts angiotensin II to angiotensin-(1-7) that activates Mas receptors, inhibits ACE1, and modulates bradykinin receptor sensitivity. This in vitro study compared the direct and indirect effects of angiotensin-(1-7), the ACE1 inhibitor captopril, and diminazene aceturate (DIZE) an alleged ACE2 activator in rings of porcine coronary arteries, by measuring changes of isometric tension. Angiotensin-(1-7), captopril, and DIZE did not cause significant changes in tension before or after desensitization of bradykinin receptors in preparations contracted with U46619. Bradykinin caused concentration-dependent and endothelium-dependent relaxations that were not affected by DIZE but were potentiated to a similar extent by angiotensin-(1-7) and captopril, given alone or in combination. Bradykinin responses potentiated by angiotensin-(1-7) and captopril were not affected by the BK1 antagonist SSR240612 and remained augmented in the presence of either N-nitro-L-arginine methyl ester hydrochloride plus indomethacin or TRAM-34 plus UCL-1684. ACE2 was identified in the coronary endothelium by immunofluorescence, but its basal activity was not influenced by DIZE. These results suggest that in coronary arteries, angiotensin-(1-7) and captopril both improves NO bioavailability and enhances endothelium-dependent hyperpolarization to bradykinin solely by ACE1 inhibition. Endothelial ACE2 activity cannot be increased by DIZE to produce local adequate amounts of angiotensin-(1-7) to influence vascular tone.
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Ferrario CM, Ahmad S, Nagata S, Simington SW, Varagic J, Kon N, Dell'italia LJ. An evolving story of angiotensin-II-forming pathways in rodents and humans. Clin Sci (Lond) 2014; 126:461-9. [PMID: 24329563 PMCID: PMC4280795 DOI: 10.1042/cs20130400] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Lessons learned from the characterization of the biological roles of Ang-(1-7) [angiotensin-(1-7)] in opposing the vasoconstrictor, proliferative and prothrombotic actions of AngII (angiotensin II) created an underpinning for a more comprehensive exploration of the multiple pathways by which the RAS (renin-angiotensin system) of blood and tissues regulates homoeostasis and its altered state in disease processes. The present review summarizes the progress that has been made in the novel exploration of intermediate shorter forms of angiotensinogen through the characterization of the expression and functions of the dodecapeptide Ang-(1-12) [angiotensin-(1-12)] in the cardiac production of AngII. The studies reveal significant differences in humans compared with rodents regarding the enzymatic pathway by which Ang-(1-12) undergoes metabolism. Highlights of the research include the demonstration of chymase-directed formation of AngII from Ang-(1-12) in human left atrial myocytes and left ventricular tissue, the presence of robust expression of Ang-(1-12) and chymase in the atrial appendage of subjects with resistant atrial fibrillation, and the preliminary observation of significantly higher Ang-(1-12) expression in human left atrial appendages.
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Affiliation(s)
| | | | | | | | | | | | - Louis Joseph Dell'italia
- §Birmingham Veterans Affair Medical Center, University of Alabama Medical Center, Alabama, AL 35294, U.S.A
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Abstract
The prevalence of Type 2 diabetes mellitus is predicted to increase dramatically over the coming years and the clinical implications and healthcare costs from this disease are overwhelming. In many cases, this pathological condition is linked to a cluster of metabolic disorders, such as obesity, systemic hypertension and dyslipidaemia, defined as the metabolic syndrome. Insulin resistance has been proposed as the key mediator of all of these features and contributes to the associated high cardiovascular morbidity and mortality. Although the molecular mechanisms behind insulin resistance are not completely understood, a negative cross-talk between AngII (angiotensin II) and the insulin signalling pathway has been the focus of great interest in the last decade. Indeed, substantial evidence has shown that anti-hypertensive drugs that block the RAS (renin-angiotensin system) may also act to prevent diabetes. Despite its long history, new components within the RAS continue to be discovered. Among them, Ang-(1-7) [angiotensin-(1-7)] has gained special attention as a counter-regulatory hormone opposing many of the AngII-related deleterious effects. Specifically, we and others have demonstrated that Ang-(1-7) improves the action of insulin and opposes the negative effect that AngII exerts at this level. In the present review, we provide evidence showing that insulin and Ang-(1-7) share a common intracellular signalling pathway. We also address the molecular mechanisms behind the beneficial effects of Ang-(1-7) on AngII-mediated insulin resistance. Finally, we discuss potential therapeutic approaches leading to modulation of the ACE2 (angiotensin-converting enzyme 2)/Ang-(1-7)/Mas receptor axis as a very attractive strategy in the therapy of the metabolic syndrome and diabetes-associated diseases.
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Karpe PA, Tikoo K. Heat shock prevents insulin resistance-induced vascular complications by augmenting angiotensin-(1-7) signaling. Diabetes 2014; 63:1124-39. [PMID: 24270982 DOI: 10.2337/db13-1267] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We have investigated the role of heat shock (HS) in preventing insulin resistance-induced endothelial dysfunction. To the best of our knowledge, we report here for the first time that insulin resistance inhibits vascular HS protein (HSP) 72 expression. HS treatment (41 °C for 20 min) restored the HSP72 expression. High-fat diet (HFD)-fed, insulin-resistant rats show attenuated angiotensin (ANG)-(1-7)-induced vasodilator effect, endothelial nitric oxide synthase (eNOS) phosphorylation, AMP-activated protein kinase phosphorylation, and sirtuin 1 (SIRT1) expression. Interestingly, HS prevented this attenuation. We also provide the first evidence that HFD-fed rats show increased vascular DNA methyltransferase 1 (DNMT1) expression and that HS prevented this increase. Our data show that in HFD-fed rats HS prevented loss in the expression of ANG-(1-7) receptor Mas and ACE2, which were responsible for vascular complications. Further, the inhibition of eNOS (l-N(G)-nitro-L-arginine methyl ester), Mas (A-779), and SIRT1 (nicotinamide) prevented the favorable effects of HS. This suggests that HS augmented ANG-(1-7) signaling via the Mas/eNOS/SIRT1 pathway. Our study, for the first time, suggests that induction of intracellular HSP72 alters DNMT1 expression, and may function as an epigenetic regulator of SIRT1 and eNOS expression. We propose that induction of HSP72 is a novel approach to prevent insulin resistance-induced vascular complications.
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Affiliation(s)
- Pinakin Arun Karpe
- Laboratory of Chromatin Biology, Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, SAS Nagar, Mohali, Punjab, India
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Chappell MC, Marshall AC, Alzayadneh EM, Shaltout HA, Diz DI. Update on the Angiotensin converting enzyme 2-Angiotensin (1-7)-MAS receptor axis: fetal programing, sex differences, and intracellular pathways. Front Endocrinol (Lausanne) 2014; 4:201. [PMID: 24409169 PMCID: PMC3886117 DOI: 10.3389/fendo.2013.00201] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 12/18/2013] [Indexed: 12/12/2022] Open
Abstract
The renin-angiotensin-system (RAS) constitutes an important hormonal system in the physiological regulation of blood pressure. Indeed, dysregulation of the RAS may lead to the development of cardiovascular pathologies including kidney injury. Moreover, the blockade of this system by the inhibition of angiotensin converting enzyme (ACE) or antagonism of the angiotensin type 1 receptor (AT1R) constitutes an effective therapeutic regimen. It is now apparent with the identification of multiple components of the RAS that the system is comprised of different angiotensin peptides with diverse biological actions mediated by distinct receptor subtypes. The classic RAS can be defined as the ACE-Ang II-AT1R axis that promotes vasoconstriction, sodium retention, and other mechanisms to maintain blood pressure, as well as increased oxidative stress, fibrosis, cellular growth, and inflammation in pathological conditions. In contrast, the non-classical RAS composed of the ACE2-Ang-(1-7)-Mas receptor axis generally opposes the actions of a stimulated Ang II-AT1R axis through an increase in nitric oxide and prostaglandins and mediates vasodilation, natriuresis, diuresis, and oxidative stress. Thus, a reduced tone of the Ang-(1-7) system may contribute to these pathologies as well. Moreover, the non-classical RAS components may contribute to the effects of therapeutic blockade of the classical system to reduce blood pressure and attenuate various indices of renal injury. The review considers recent studies on the ACE2-Ang-(1-7)-Mas receptor axis regarding the precursor for Ang-(1-7), the intracellular expression and sex differences of this system, as well as an emerging role of the Ang1-(1-7) pathway in fetal programing events and cardiovascular dysfunction.
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Affiliation(s)
- Mark C. Chappell
- The Hypertension and Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Allyson C. Marshall
- The Hypertension and Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Ebaa M. Alzayadneh
- The Hypertension and Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Hossam A. Shaltout
- The Hypertension and Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC, USA
- Department of Obstetrics and Gynecology, Wake Forest University School of Medicine, Winston-Salem, NC, USA
- Department of Pharmacology and Toxicology, School of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Debra I. Diz
- The Hypertension and Vascular Research Center, Wake Forest University School of Medicine, Winston-Salem, NC, USA
- *Correspondence: Debra I. Diz, The Hypertension and Vascular Research Center, Wake Forest University School of Medicine, Medical Center Blvd, Winston-Salem, NC 27157-1032, USA e-mail:
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Suski M, Olszanecki R, Stachowicz A, Madej J, Bujak-Giżycka B, Okoń K, Korbut R. The influence of angiotensin-(1–7) Mas receptor agonist (AVE 0991) on mitochondrial proteome in kidneys of apoE knockout mice. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2013; 1834:2463-9. [DOI: 10.1016/j.bbapap.2013.08.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 08/19/2013] [Indexed: 12/18/2022]
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Dysregulated Renin-AngioteNsin System Contributes to acute Lung Injury Caused by Hind-limb Ischemia-Reperfusion in Mice. Shock 2013; 40:420-9. [DOI: 10.1097/shk.0b013e3182a6953e] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Prolonged treatment with angiotensin 1-7 improves endothelial function in diet-induced obesity. J Hypertens 2013; 31:730-8. [PMID: 23425706 DOI: 10.1097/hjh.0b013e32835ecbe5] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE The renin-angiotensin system peptides are critically involved in the regulation of endothelial function with important pathological implications. Angiotensin (Ang) 1-7 has many beneficial effects in the vasculature that modulate the cardiovascular risk. Here, we tested the hypothesis that Ang 1-7 has a protective role against the endothelial defects associated with diet-induced obesity (DIO) in mice. METHODS Ang 1-7 (with or without Ang II) was delivered subcutaneously for 4 weeks using osmotic minipumps. Vascular studies were performed using aortic rings. Arterial pressure and heart rate were measured in separate cohorts of mice by telemetry. RESULTS First, we examined whether chronic administration of Ang 1-7 improves the vascular dysfunctions caused by Ang II. Subcutaneous coinfusion of Ang 1-7 significantly attenuates Ang II-induced endothelial dysfunctions. In addition, DIO mice have significant impairment in the endothelium-dependent relaxation. The contractile responses induced by various stimuli, including serotonin and endothelin-1, were differentially altered in DIO mice. Notably, DIO mice treated with Ang 1-7 for 4 weeks displayed significant improvement in the endothelial function as indicated by the increased acetylcholine-induced relaxation. Consistent with this, chronic treatment with Ang 1-7 reversed the increased aortic expression of NAD(P)H oxidase subunits (p22(phox) and p47(phox)) and plasma TBARS associated with DIO mice. In contrast, treatment with Ang 1-7 did not normalize the altered contractions associated with DIO mice. CONCLUSION Our data demonstrate a novel role for Ang 1-7 in improving obesity-associated endothelial dysfunction.
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Wysocki J, Garcia-Halpin L, Ye M, Maier C, Sowers K, Burns KD, Batlle D. Regulation of urinary ACE2 in diabetic mice. Am J Physiol Renal Physiol 2013; 305:F600-11. [PMID: 23761674 PMCID: PMC3891267 DOI: 10.1152/ajprenal.00600.2012] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 06/06/2013] [Indexed: 01/30/2023] Open
Abstract
Angiotensin-converting enzyme-2 (ACE2) enhances the degradation of ANG II and its expression is altered in diabetic kidneys, but the regulation of this enzyme in the urine is unknown. Urinary ACE2 was studied in the db/db model of type 2 diabetes and stretozotocin (STZ)-induced type 1 diabetes during several physiological and pharmacological interventions. ACE2 activity in db/db mice was increased in the serum and to a much greater extent in the urine compared with db/m controls. Neither a specific ANG II blocker, telmisartan, nor an ACE inhibitor, captopril, altered the levels of urinary ACE2 in db/db or db/m control mice. High-salt diet (8%) increased whereas low-salt diet (0.1%) decreased urinary ACE2 activity in the urine of db/db mice. In STZ mice, urinary ACE2 was also increased, and insulin decreased it partly but significantly after several weeks of administration. The increase in urinary ACE2 activity in db/db mice reflected an increase in enzymatically active protein with two bands identified of molecular size at 110 and 75 kDa and was associated with an increase in kidney cortex ACE2 protein at 110 kDa but not at 75 kDa. ACE2 activity was increased in isolated tubular preparations but not in glomeruli from db/db mice. Administration of soluble recombinant ACE2 to db/m and db/db mice resulted in a marked increase in serum ACE2 activity, but no gain in ACE2 activity was detectable in the urine, further demonstrating that urinary ACE2 is of kidney origin. Increased urinary ACE2 was associated with more efficient degradation of exogenous ANG II (10(-9) M) in urine from db/db compared with that from db/m mice. Urinary ACE2 could be a potential biomarker of increased metabolism of ANG II in diabetic kidney disease.
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Affiliation(s)
- Jan Wysocki
- Div. of Nephrology and Hypertension, Dept. of Medicine, The Feinberg School of Medicine, Northwestern Univ., 320 E. Superior, Chicago, IL 60611.
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Rüster C, Wolf G. The role of the renin-angiotensin-aldosterone system in obesity-related renal diseases. Semin Nephrol 2013; 33:44-53. [PMID: 23374893 DOI: 10.1016/j.semnephrol.2012.12.002] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Obesity is an independent risk factor for the development and progression of chronic kidney disease and one of the emerging reasons for end-stage renal disease owing to its dramatic increase worldwide. Among the potential underlying pathophysiologic mechanisms, activation of the renin-angiotensin-aldosterone-system (RAAS) plays a central role. Increased angiotensin II (AngII) levels also are central in hypertension, dyslipidemia, and insulin resistance, which, taken together with obesity, represent the metabolic syndrome. Increased AngII levels contribute to hyperfiltration, glomerulomegaly, and subsequent focal glomerulosclerosis by altering renal hemodynamics via afferent arteriolar dilation, together with efferent renal arteriolar vasoconstriction as well as by its endocrine and paracrine properties linking the intrarenal and the systemic RAAS, adipose tissue dysfunction, as well as insulin resistance and hypertension. The imbalance between increased AngII levels and the angiotensin converting enzyme 2/Ang (1-7)/Mas receptor axis additionally contributes to renal injury in obesity and its concomitant metabolic disturbances. As shown in several large trials and experimental studies, treatment of obesity by weight loss is associated with an improvement of kidney disease because it also is beneficial in dyslipidemia, hypertension, and diabetes. The most promising data have been seen by RAAS blockade, pointing to the central position of RAAS within obesity, kidney disease, and the metabolic syndrome.
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Affiliation(s)
- Christiane Rüster
- Department of Internal Medicine III, University Hospital Jena, Jena, Germany
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Kilarkaje N, Yousif MH, El-Hashim AZ, Makki B, Akhtar S, Benter IF. Role of angiotensin II and angiotensin-(1–7) in diabetes-induced oxidative DNA damage in the corpus cavernosum. Fertil Steril 2013; 100:226-33. [DOI: 10.1016/j.fertnstert.2013.02.046] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 02/19/2013] [Accepted: 02/26/2013] [Indexed: 12/17/2022]
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AT1, AT2, and AT(1-7) receptor expression in the uteroplacental unit of normotensive and hypertensive rats during early and late pregnancy. Placenta 2013; 34:497-502. [PMID: 23602334 DOI: 10.1016/j.placenta.2013.03.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 03/02/2013] [Accepted: 03/23/2013] [Indexed: 02/01/2023]
Abstract
INTRODUCTION We investigated the expression of angiotensin receptors in early pregnancy and established whether normal pregnancy or preeclampsia alters the expression and distribution of the uteroplacental AT1R, AT2R and mas/AT1-7R at late gestation. METHODS The percentage of each receptor subtype present in tissues from virgin rats and from normotensive and RUPP hypertensive pregnant rats was established by in vitro receptor autoradiography. Receptor mRNA levels were determined by quantitative PCR at early and late pregnancy. RESULTS AT1R mRNA levels were up-regulated in the interimplantation (IIS) site at day 7 of gestation. AT2R mRNA levels were decreased at day 5 and 7 in the IIS but increased in the implantation site (IS) at day 5 and 7 as compared to the IIS at day 5. Mas/AT1-7R mRNA was increased in early pregnancy. In normal pregnancy and RUPP the mRNA for all angiotensin receptors was reduced in the uterus at late gestation. The AT1R accounted for the majority of binding in the uterus of virgin and the placenta of pregnant and RUPP. In RUPP pregnancy there was a significant competition with d-Ala in the placenta labyrinth. DISCUSSION AND CONCLUSION The expression of angiotensin receptors suggests their involvement in the maintenance of early stages of pregnancy. During late gestation down-regulation of Ang receptors in the uterus may arise from feedback down-regulation by Ang II. In the placenta the levels of AT1Rs are equivalent in the RUPP model. The increased binding of mas/AT1-7R at late gestation in RUPP may represent a compensatory mechanism to reduce uteroplacental vascular resistance.
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Abstract
Ang-(1–7) [angiotensin-(1–7)] constitutes an important functional end-product of the RAS (renin–angiotensin system) endogenously formed from AngI (angiotensin I) or AngII (angiotensin II) through the catalytic activity of ACE2 (angiotensin-converting enzyme 2), prolyl carboxypeptidase, neutral endopeptidase or other endopeptidases. Ang-(1–7) lacks the pressor, dipsogenic or stimulatory effect on aldosterone release characteristic of AngII. In contrast, it produces vasodilation, natriuresis and diuresis, and inhibits angiogenesis and cell growth. At the central level, Ang-(1–7) acts at sites involved in the control of cardiovascular function, thus contributing to blood pressure regulation. This action may result from its inhibitory neuromodulatory action on NE [noradrenaline (norepinephrine)] levels at the synaptic cleft, i.e. Ang-(1–7) reduces NE release and synthesis, whereas it causes an increase in NE transporter expression, contributing in this way to central NE neuromodulation. Thus, by selective neurotransmitter release, Ang-(1–7) may contribute to the overall central cardiovascular effects. In the present review, we summarize the central effects of Ang-(1–7) and the mechanism by which the peptide modulates NE levels in the synaptic cleft. We also provide new evidences of its cerebroprotective role.
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Ahmad S, Wei CC, Tallaj J, Dell'Italia LJ, Moniwa N, Varagic J, Ferrario CM. Chymase mediates angiotensin-(1-12) metabolism in normal human hearts. ACTA ACUST UNITED AC 2013; 7:128-36. [PMID: 23312967 DOI: 10.1016/j.jash.2012.12.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 11/26/2012] [Accepted: 12/10/2012] [Indexed: 10/27/2022]
Abstract
Identification of angiotensin-(1-12) [Ang-(1-12)] in forming angiotensin II (Ang II) by a non-renin dependent mechanism has increased knowledge on the paracrine/autocrine mechanisms regulating cardiac expression of Ang peptides. This study now describes in humans the identity of the enzyme accounting for Ang-(1-12) metabolism in the left ventricular (LV) tissue of normal subjects. Reverse phase HPLC characterized the products of (125)I-Ang-(1-12) metabolism in plasma membranes (PMs) from human LV in the absence and presence of inhibitors for chymase (chymostatin), angiotensin-converting enzyme (ACE) 1 (lisinopril) and 2 (MLN-4760), and neprilysin (SHC39370). In the presence of the inhibitor cocktail, ≥ 98% ± 2% of cardiac (125)I-Ang-(1-12) remained intact, whereas exclusion of chymostatin from the inhibitor cocktail led to significant conversion of Ang-(1-12) into Ang II. In addition, chymase-mediated hydrolysis of (125)I-Ang I was higher compared with Ang-(1-12). Negligible Ang-(1-12) hydrolysis occurred by ACE, ACE2, and neprilysin. A high chymase activity was detected for both (125)I-Ang-(1-12) and (125)I-Ang I substrates. Chymase accounts for the conversion of Ang-(1-12) and Ang I to Ang II in normal human LV. These novel findings expand knowledge of the alternate mechanism by which Ang-(1-12) contributes to the production of cardiac angiotensin peptides.
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Affiliation(s)
- Sarfaraz Ahmad
- Division of Surgical Sciences, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA
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Combination renin-angiotensin system blockade and angiotensin-converting enzyme 2 in experimental myocardial infarction: implications for future therapeutic directions. Clin Sci (Lond) 2012; 123:649-58. [PMID: 22715807 DOI: 10.1042/cs20120162] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The RAS (renin-angiotensin system) is activated after MI (myocardial infarction), and RAS blockade with ACEis [ACE (angiotensin-converting enzyme) inhibitors] or ARBs (angiotensin receptor blockers) slows but does not completely prevent progression to heart failure. Cardiac ACE is increased after MI and leads to the formation of the vasoconstrictor AngII (angiotensin II). The enzyme ACE2 is also activated after MI and degrades AngII to generate the vasodilator Ang-(1-7) [angiotensin-(1-7)]. Overexpression of ACE2 offers cardioprotective effects in experimental MI, but there is conflicting evidence as to whether the benefits of ACEis and ARBs are mediated through increasing ACE2 after MI. In the present study, we assessed the effect of an ACEi and ARB, alone and in combination, on cardiac ACE2 in a rat MI model. MI rats received vehicle, ACEi (ramipril; 1 mg/kg of body weight), ARB (valsartan; 10 mg/kg of body weight) or combination (ramipril at 1 mg/kg of body weight and valsartan at 10 mg/kg of body weight) orally for 28 days. Sham-operated rats were also studied and received vehicle alone. MI increased LV (left ventricular) mass (P<0.0001), impaired cardiac contractility (P<0.05) and activated cardiac ACE2 with increased gene (P<0.05) and protein expression (viable myocardium, P<0.05; border zone, P<0.001; infarct, P<0.05). Ramipril and valsartan improved remodelling (P<0.05), with no additional effect of dual therapy. Although ramipril inhibited ACE, and valsartan blocked the angiotensin receptor, neither treatment alone nor in combination augmented cardiac ACE2 expression. These results suggest that the cardioprotective effects of ramipril and valsartan are not mediated through up-regulation of cardiac ACE2. Strategies that do augment ACE2 after MI may be a useful addition to standard RAS blockade after MI.
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Akhtar S, Yousif MHM, Dhaunsi GS, Chandrasekhar B, Al-Farsi O, Benter IF. Angiotensin-(1-7) inhibits epidermal growth factor receptor transactivation via a Mas receptor-dependent pathway. Br J Pharmacol 2012; 165:1390-400. [PMID: 21806601 DOI: 10.1111/j.1476-5381.2011.01613.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND PURPOSE The transactivation of the epidermal growth factor (EGF) receptor appears to be an important central transduction mechanism in mediating diabetes-induced vascular dysfunction. Angiotensin-(1-7) [Ang-(1-7)] via its Mas receptor can prevent the development of hyperglycaemia-induced cardiovascular complications. Here, we investigated whether Ang-(1-7) can inhibit hyperglycaemia-induced EGF receptor transactivation and its classical signalling via ERK1/2 and p38 MAPK in vivo and in vitro. EXPERIMENTAL APPROACH Streptozotocin-induced diabetic rats were chronically treated with Ang-(1-7) or AG1478, a selective EGF receptor inhibitor, for 4 weeks and mechanistic studies performed in the isolated mesenteric vasculature bed as well as in primary cultures of vascular smooth muscle cells (VSMCs). KEY RESULTS Diabetes significantly enhanced phosphorylation of EGF receptor at tyrosine residues Y992, Y1068, Y1086, Y1148, as well as ERK1/2 and p38 MAPK in the mesenteric vasculature bed whereas these changes were significantly attenuated upon Ang-(1-7) or AG1478 treatment. In VSMCs grown in conditions of high glucose (25 mM), an Src-dependent elevation in EGF receptor phosphorylation was observed. Ang-(1-7) inhibited both Ang II- and glucose-induced transactivation of EGF receptor. The inhibition of high glucose-mediated Src-dependant transactivation of EGF receptor by Ang-(1-7) could be prevented by a selective Mas receptor antagonist, D-Pro7-Ang-(1-7). CONCLUSIONS AND IMPLICATIONS These results show for the first time that Ang-(1-7) inhibits EGF receptor transactivation via a Mas receptor/Src-dependent pathway and might represent a novel general mechanism by which Ang-(1-7) exerts its beneficial effects in many disease states including diabetes-induced vascular dysfunction.
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Affiliation(s)
- Saghir Akhtar
- Department of Pharmacology and Toxicology, Faculty of Medicine, Kuwait University, Safat, Kuwait.
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Muñoz MC, Giani JF, Burghi V, Mayer MA, Carranza A, Taira CA, Dominici FP. The Mas receptor mediates modulation of insulin signaling by angiotensin-(1–7). ACTA ACUST UNITED AC 2012; 177:1-11. [DOI: 10.1016/j.regpep.2012.04.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 03/29/2012] [Accepted: 04/23/2012] [Indexed: 02/01/2023]
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Yang XH, Wang YH, Wang JJ, Liu YC, Deng W, Qin C, Gao JL, Zhang LY. Role of angiotensin-converting enzyme (ACE and ACE2) imbalance on tourniquet-induced remote kidney injury in a mouse hindlimb ischemia-reperfusion model. Peptides 2012; 36:60-70. [PMID: 22580272 DOI: 10.1016/j.peptides.2012.04.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 04/29/2012] [Accepted: 04/30/2012] [Indexed: 12/14/2022]
Abstract
In this study, the relationship between the local imbalance of angiotensin converting enzymes ACE and ACE2 as well as Ang II and Ang (1-7) and renal injury was observed in the different genotypes mice subjected to tourniquet-induced ischemia-reperfusion on hind limbs. In wild-type mice, renal ACE expression increased while renal ACE2 expression decreased significantly after reperfusion, accompanied by elevated serum angiotensin II (Ang II) level and lowered serum angiotensin (1-7) (Ang (1-7)) level. However, renal Ang (1-7) also increased markedly while renal Ang II was elevated. Renal injury became evident after limb reperfusion, with increased malondialdehyde (MDA), decreased super-oxide dismutase (SOD) activity and increased serum blood urea nitrogen (BUN) and creatinine (Cr), compared to control mice. These mice also developed severe renal pathology including infiltration of inflammatory cells in the renal interstitium and degeneration of tubule epithelial cells. In ACE2 knock-out mice with ACE up-regulation, tourniquet-induced renal injury was significantly aggravated as shown by increased levels of MDA, BUN and Cr, decreased SOD activity, more severe renal pathology, and decreased survival rate, compared with tourniquet-treated wild-type mice. Conversely, ACE2 transgenic mice with normal ACE expression were more resistant to tourniquet challenge as evidenced by decreased levels of MDA, BUN and Cr, increased SOD activity, attenuated renal pathological changes and increased survival rate. Our results suggest that the deregulation of ACE and ACE2 plays an important role in tourniquet-induced renal injury and that ACE2 up-regulation to restore the proper ACE/ACE2 balance is a potential therapeutic strategy for kidney injury.
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Affiliation(s)
- Xiu-hong Yang
- Department of Physiology, School of Basic Medical Science, Hebei United University, Tangshan, Hebei, China.
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Characterization of Angiotensin-(1-7) effects on the cardiovascular system in an experimental model of type-1 diabetes. Pharmacol Res 2012; 66:269-75. [PMID: 22580236 DOI: 10.1016/j.phrs.2012.05.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 04/05/2012] [Accepted: 05/01/2012] [Indexed: 11/24/2022]
Abstract
Although exogenous administration of Angiotensin-(1-7) [Ang-(1-7)] can prevent development of diabetes induced end-organ damage, little is known about the role of endogenous Ang-(1-7) in diabetes and requires further characterization. Here, we studied the effects of chronically inhibiting endogenous Ang-(1-7) formation with DX600, a selective angiotensin converting enzyme-2 (ACE2) inhibitor, on renal and cardiac NADPH oxidase (NOX) activity, vascular reactivity and cardiac function in a model of Type-1 diabetes. The contribution of endogenous Ang-(1-7) to the protective effects of Losartan and Captopril and that of prostaglandins to the cardiovascular effects of exogenous Ang-(1-7) were also examined. Cardiac and renal NOX activity, vascular reactivity to endothelin-1 (ET-1) and cardiac recovery from ischemia/reperfusion (I/R) injury were evaluated in streptozotocin-treated rats. Chronic treatment with DX600 exacerbated diabetes-induced increase in cardiac and renal NOX activity. Diabetes-induced abnormal vascular reactivity to ET-1 and cardiac dysfunction were improved by treatment with Ang-(1-7) and worsened by treatment with DX600 or A779, a Mas receptor antagonist. Ang-(1-7)-mediated improvement in cardiac recovery or vascular reactivity was attenuated by Indomethacin. Captopril and Losartan-induced improvement in cardiovascular function was attenuated when these drugs were co-administered with A779. Ang-(1-7)-mediated decrease in renal NOX activity was prevented by indomethacin. Losartan also decreased renal NOX activity that could be attenuated with A779 co-treatment. In conclusion, endogenous Ang-(1-7) inhibits diabetes-induced cardiac/renal NOX activity and end-organ damage, and mediates the actions of Captopril and Losartan. Further, prostaglandins are important intermediaries in the beneficial effects of Ang-(1-7) in diabetes. Combining either Losartan or Captopril with Ang-(1-7) had additional beneficial effects in preventing diabetes-induced cardiac dysfunction and this may represent a novel therapeutic strategy. Collectively, these data shed new insights into the likely mechanism of action through which the ACE2/Ang-(1-7)/Mas receptor axis prevents Type 1 diabetes-induced cardiovascular dysfunction.
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Cerrato BD, Frasch AP, Nakagawa P, Longo-Carbajosa N, Peña C, Höcht C, Gironacci MM. Angiotensin-(1–7) upregulates central nitric oxide synthase in spontaneously hypertensive rats. Brain Res 2012; 1453:1-7. [DOI: 10.1016/j.brainres.2012.03.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 02/17/2012] [Accepted: 03/08/2012] [Indexed: 11/15/2022]
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Burrell LM, Burchill L, Dean RG, Griggs K, Patel SK, Velkoska E. Chronic kidney disease: cardiac and renal angiotensin-converting enzyme (ACE) 2 expression in rats after subtotal nephrectomy and the effect of ACE inhibition. Exp Physiol 2011; 97:477-85. [PMID: 22198016 DOI: 10.1113/expphysiol.2011.063156] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Renin-angiotensin system blockade slows but does not prevent the cardiovascular complications of chronic kidney disease (CKD). Angiotensin-converting enzyme (ACE) 2 is differentially regulated in acute kidney injury, with increased cardiac ACE2 but decreased kidney ACE2 levels. This study investigated the effect of long-term ACE inhibition on cardiac and renal ACE2 in rats with CKD induced by subtotal nephrectomy (STNx). Sprague-Dawley rats had sham (control) or STNx surgery. Control rats received vehicle (n = 9) and STNx rats ramipril (1 mg kg(-1) day(-1); n = 10) or vehicle (n = 10) for 28 days. Subtotal nephrectomy resulted in impaired creatinine clearance (P < 0.05), proteinuria (P < 0.05), renal fibrosis (P < 0.05) and reduced renal cortical ACE2 mRNA (P < 0.05) and activity (P < 0.05). In rats with CKD, ramipril improved creatinine clearance (P < 0.05) and was associated with an increase in cortical but not medullary ACE2 activity (P < 0.05). Compared with control rats, STNx rats were hypertensive (P < 0.01), with increased left ventricular end-diastolic pressure (LVEDP; P < 0.01), left ventricular hypertrophy (LVH; P < 0.05) and interstitial (P < 0.05) and perivascular fibrosis (P < 0.01). In rats with CKD, ramipril decreased blood pressure (P < 0.001) and reduced LVEDP (P < 0.01), LVH (P < 0.01) and perivascular fibrosis (P < 0.05) but did not significantly reduce interstitial fibrosis. There was no change in cardiac ACE2 in rats with CKD compared with control rats. In rats with CKD, ACE inhibition had major benefits to reduce blood pressure and cardiac hypertrophy and to improve creatinine clearance, but did not significantly impact on cardiac ACE2, cardiac interstitial fibrosis, renal fibrosis or proteinuria. Thus, in rats with CKD, renal ACE2 deficiency and lack of activation of cardiac ACE2 may contribute to the progression of cardiac and renal tissue injury. As long-term ACE inhibition only partly ameliorated the adverse cardio-renal effects of CKD, adjunctive therapies that lead to further increases in ACE2 activity may be needed to combat the cardio-renal complications of CKD.
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Affiliation(s)
- L M Burrell
- Department of Medicine, University of Melbourne, Austin Health, Heidelberg, Victoria, Australia.
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Lopez Verrilli MA, Rodriguez Fermepín M, Longo Carbajosa N, Landa S, Cerrato BD, García S, Fernandez BE, Gironacci MM. Angiotensin-(1-7) through Mas receptor up-regulates neuronal norepinephrine transporter via Akt and Erk1/2-dependent pathways. J Neurochem 2011; 120:46-55. [DOI: 10.1111/j.1471-4159.2011.07552.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Igase M, Yokoyama H, Ferrario CM. Attenuation of hypertension-mediated glomerulosclerosis in conjunction with increased angiotensin (1-7). Ther Adv Cardiovasc Dis 2011; 5:297-304. [PMID: 22089474 DOI: 10.1177/1753944711429343] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Controversy exists as to whether angiotensin (1-7) (Ang (1-7)) acts as a protective hormone against renal injury. METHODS We compared the degree of improvement of hypertensive nephropathy following 8 weeks' treatment with either the angiotensin II receptor type 1 antagonist olmesartan medoxomil or the cardioselective beta blocker atenolol in 8-week-old spontaneously hypertensive rats (SHRs). RESULTS Both treatment regimens reduced mean blood pressure in a similar fashion, while bradycardia was present only in atenolol-treated SHRs. The heart weight:body weight ratio fell more in SHRs medicated with olmesartan versus those receiving atenolol. These changes were associated with increases in plasma Ang II in SHRs given the angiotensin II receptor blocker. At the end of treatment, plasma Ang (1-7) was higher in the olmesartan than atenolol or vehicle groups. The glomerular sclerosis (GS) index was lowered by olmesartan and atenolol compared with the vehicle group. While both olmesartan and atenolol attenuated renal perivascular collagen deposition (PVCD), the greatest effect was observed in SHRs receiving olmesartan. Elevations in plasma Ang (1-7) correlated negatively with reductions in GS or PVCD index, respectively. CONCLUSIONS While control of blood pressure remains a critical factor in the prevention of hypertensive nephropathy, Ang (1-7) may play a substantial role in preventing the structural changes in glomerulus through its effect on regulations of blood pressure and renal function.
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Affiliation(s)
- Michiya Igase
- Department of Geriatric Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon City, Ehime 791-0295, Japan
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Zimmerman MC. Angiotensin II and angiotensin-1-7 redox signaling in the central nervous system. Curr Opin Pharmacol 2011; 11:138-43. [PMID: 21257347 DOI: 10.1016/j.coph.2011.01.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 01/05/2011] [Indexed: 02/07/2023]
Abstract
Reactive oxygen species (ROS) are important intra-neuronal signaling intermediates in angiotensin II (AngII)-related neuro-cardiovascular diseases associated with excessive sympathoexcitation, including hypertension and heart failure. ROS-sensitive effector mechanisms, such as modulation of ion channel activity, indicate that elevated levels of ROS increase neuronal activity. Nitric oxide, which may work to counter the effects of ROS, particularly superoxide, has been identified as a signaling molecule in angiotensin-1-7 (Ang-(1-7)) stimulated neurons. This review focuses on recent studies that have revealed details on the AngII-activated sources of ROS, the downstream redox-sensitive effectors, Ang-(1-7)-stimulated increase in nitric oxide, and the neuro-cardiovascular (patho)physiological responses modulated by these reactive species. Understanding these intra-neuronal signaling mechanisms should provide insight for the development of new redox-based therapeutics for the improved treatment of angiotensin-dependent neuro-cardiovascular diseases.
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Affiliation(s)
- Matthew C Zimmerman
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, USA.
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