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Chen RJ, Rui QL, Wang Q, Tian F, Wu J, Kong XQ. Shenfu injection attenuates lipopolysaccharide-induced myocardial inflammation and apoptosis in rats. Chin J Nat Med 2020; 18:226-233. [PMID: 32245593 DOI: 10.1016/s1875-5364(20)30025-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Indexed: 11/18/2022]
Abstract
Shenfu injection (SFI), a Chinese medicinal product, shows potent efficacy in treating sepsis. The aim of the present study was to clarify the protective effects of SFI against lipopolysaccharide (LPS)-induced myocardial inflammation and apoptosis. Experiments were carried out in Sprague-Dawley (SD) rats treated with LPS or LPS + SFI, and in H9C2 cardiomyocytes. The sepsis-associated myocardial inflammation and apoptosis was induced by the intraperitoneal injection of LPS (20 mg·kg-1). SFI attenuated the increased expression of tumor necrosis factor (TNF)-α and interleukin (IL)-1β induced by LPS both in serum and heart. In LPS group, cell viability was reduced, and reversed after SFI administration. LPS treatment increased the expression levels of cleaved-caspase 3 and Bax, and those of Bcl2 and Bcl2/Bax. These two trends were reversed by SFI administration. The expression levels of phosphorylated mitogen-activated protein kinase kinase (p-MEK) and phosphorylated extracellular regulated protein kinases (p-ERK) were increased by LPS, and reversed by SFI. MEK inhibitor U0126 attenuated the apoptosis induced by LPS. These results indicate that SFI could treat LPS-induced cardiac dysfunction. In conclusion, SFI attenuates the inflammation and apoptosis induced by LPS via downregulating the MEK and ERK signaling pathways.
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Affiliation(s)
- Rui-Juan Chen
- Cardiology Department, the First Affiliated Hospital with Nanjing Medical University, Nanjing 210029, China; Emergency Department, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing 210029, China
| | - Qing-Lin Rui
- Emergency Department, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing 210029, China
| | - Qiong Wang
- Clinical Pharmacology Department, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing 210029, China
| | - Fang Tian
- Central Laboratory, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing 210029, China
| | - Jian Wu
- Central Laboratory, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing 210029, China
| | - Xiang-Qing Kong
- Cardiology Department, the First Affiliated Hospital with Nanjing Medical University, Nanjing 210029, China.
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52
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Wu B, Song H, Fan M, You F, Zhang L, Luo J, Li J, Wang L, Li C, Yuan M. Luteolin attenuates sepsis‑induced myocardial injury by enhancing autophagy in mice. Int J Mol Med 2020; 45:1477-1487. [PMID: 32323750 PMCID: PMC7138288 DOI: 10.3892/ijmm.2020.4536] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 01/28/2020] [Indexed: 02/05/2023] Open
Abstract
Sepsis-induced cardiomyopathy (SIC) is a complication of severe sepsis and septic shock characterized by an invertible myocardial depression. This study sought to explore the potential effects and mechanism of luteolin, a flavonoid polyphenolic compound, in lipopolysaccharide (LPS)-induced myocardial injury. Experimental mice were randomly allocated into 3 groups (25 mice in each group): The control group (NC), the LPS group (LPS) and the LPS + luteolin group (LPS + Lut). Before the SIC model was induced, luteolin was dissolved in DMSO and injected intraperitoneally for 10 days into LPS + Lut group mice. NC group and LPS group mice received an equal volume of DMSO for 10 days. On day 11, the animal model of sepsis-induced cardiac dysfunction was induced by intraperitoneal injection of LPS. A total of 12 h after LPS injection, measurements and comparisons were made among the groups. Luteolin administration improved cardiac function, attenuated the inflammatory response, alleviated mitochondrial injury, decreased oxidative stress, inhibited cardiac apoptosis and enhanced autophagy. In addition, luteolin significantly decreased the phosphorylation of AMP-activated protein kinase (AMPK) in septic heart tissue. The protective effect of luteolin was abolished by 3-methyladenine (an autophagy inhibitor) and dorsomorphin (compound C, an AMPK inhibitor), as evidenced by decreased autophagic activity, destabilized mitochondrial membrane potential and increased apoptosis in LPS-treated cardiomyocytes, but was mimicked by 5-aminoimidazole-4-carboxamide ribonucleotide (an AMPK activator), suggesting that luteolin attenuates LPS-induced myocardial injury by increasing autophagy through AMPK activation. Luteolin may be a promising therapeutic agent for treating SIC.
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Affiliation(s)
- Bin Wu
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Haixu Song
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Miaomiao Fan
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Fei You
- Department of Cardiology, Xi'an Central Hospital, Xi'an, Shaanxi 710004, P.R. China
| | - Liang Zhang
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Jian Luo
- Department of Internal Medicine (VIP), First Affiliated Hospital, Xinjiang Medical University, Urumqi, Xinjiang 830000, P.R. China
| | - Junzhi Li
- Department of Pathology, First Affiliated Hospital, Xinjiang Medical University, Urumqi, Xinjiang 830000, P.R. China
| | - Lingpeng Wang
- Department of Cardiology, First Affiliated Hospital, Xinjiang Medical University, Urumqi, Xinjiang 830000, P.R. China
| | - Congye Li
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Ming Yuan
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
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Heimfarth L, Carvalho AMS, Quintans JDSS, Pereira EWM, Lima NT, Bezerra Carvalho MT, Barreto RDSS, Moreira JCF, da Silva-Júnior EF, Schmitt M, Bourguignon JJ, de Aquino TM, Araújo-Júnior JXD, Quintans-Júnior LJ. Indole-3-guanylhydrazone hydrochloride mitigates long-term cognitive impairment in a neonatal sepsis model with involvement of MAPK and NFκB pathways. Neurochem Int 2020; 134:104647. [DOI: 10.1016/j.neuint.2019.104647] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 12/09/2019] [Accepted: 12/18/2019] [Indexed: 01/20/2023]
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Gómez-Mendoza DP, Marques FD, Melo-Braga MN, Sprenger RR, Sinisterra RD, Kjeldsen F, Santos RA, Verano-Braga T. Angiotensin-(1-7) oral treatment after experimental myocardial infarction leads to downregulation of CXCR4. J Proteomics 2019; 208:103486. [DOI: 10.1016/j.jprot.2019.103486] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 08/05/2019] [Accepted: 08/10/2019] [Indexed: 11/27/2022]
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Zhu P, Verma A, Prasad T, Li Q. Expression and Function of Mas-Related G Protein-Coupled Receptor D and Its Ligand Alamandine in Retina. Mol Neurobiol 2019; 57:513-527. [PMID: 31392515 DOI: 10.1007/s12035-019-01716-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 07/19/2019] [Indexed: 12/21/2022]
Abstract
A local renin-angiotensin system (RAS) exists in the retina and plays a critical role in retinal neurovascular function. The protective axis of RAS comprising of angiotensin-converting enzyme 2 (ACE2)/angiotensin-(1-7) [Ang-(1-7)]/Mas receptor attenuate the deleterious actions of increased levels of angiotensin II (Ang II), the main effector peptide of RAS. A new peptide, alamandine, and its receptor Mas-related G protein-coupled receptor D (MrgD) have been recently identified that share structural and functional similarity to Ang-(1-7) and its receptor, Mas, establishing another new protective axis of RAS. Here, we examined the expression and cellular localization of MrgD in the retina, the effect of MrgD deficiency on mouse retinal structure and function, as well as the biological function of alamandine in cultured retinal cells. We showed that MrgD is expressed in the retinal neurons, retinal vasculature, Müller glial and RPE cells, similar to Mas receptor expression. MrgD-deficient mice did not exhibit gross change in retinal morphology and thickness; however, these mice did show a progressive decrease in both scotopic and photopic a-wave and b-wave amplitudes, and increase in retinal capillary loss with age compared to age-matched wild-type mice. In vitro studies in human retinal cells showed that alamandine attenuated the Ang II and LPS-induced increases in inflammatory cytokine gene expression, NF-κB activation, Ang II and hydrogen peroxide-induced production of reactive oxygen species, comparable to that mediated by Ang-(1-7). These results support the notion that alamandine/MrgD may represent another new protective axis of RAS in the retina exerting anti-oxidative and anti-inflammatory effects.
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Affiliation(s)
- Ping Zhu
- Department of Ophthalmology, College of Medicine, University of Florida, Gainesville, FL, 32610-0284, USA
| | - Amrisha Verma
- Department of Ophthalmology, College of Medicine, University of Florida, Gainesville, FL, 32610-0284, USA
| | - Tuhina Prasad
- Department of Ophthalmology, College of Medicine, University of Florida, Gainesville, FL, 32610-0284, USA
| | - Qiuhong Li
- Department of Ophthalmology, College of Medicine, University of Florida, Gainesville, FL, 32610-0284, USA.
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Valproic acid attenuates sepsis-induced myocardial dysfunction in rats by accelerating autophagy through the PTEN/AKT/mTOR pathway. Life Sci 2019; 232:116613. [PMID: 31265853 DOI: 10.1016/j.lfs.2019.116613] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 06/27/2019] [Accepted: 06/27/2019] [Indexed: 01/15/2023]
Abstract
AIMS Sepsis is a leading cause of death and disability worldwide. Autophagy may play a protective role in sepsis-induced myocardial dysfunction (SIMD). The present study investigated whether valproic acid (VPA), a class I histone deacetylase (HDAC) inhibitor, can attenuate SIMD by accelerating autophagy. MAIN METHODS A sepsis model was established via the cecum ligation and puncture of male Sprague-Dawley rats. Cardiac injuries were measured using serum markers, echocardiographic cardiac parameters, and hematoxylin and eosin staining. Cardiac mitochondria injuries were detected with transmission electron microscopy, adenosine triphosphate (ATP) and cardiac mitochondrial DNA (mtDNA) contents. Cardiac oxidative levels were measured using redox markers in the cardiac homogenate. Real-time polymerase chain reaction (RT-PCR) and Western blot were performed to detect the expression levels of relative genes and proteins. HDAC binding to the phosphatase and tensin homolog deleted on chromosome ten (PTEN) promoters and histone acetylation levels of the PTEN promoters were analyzed via chromatin immunoprecipitation and quantitative RT-PCR. KEY FINDINGS VPA can ameliorate SIMD by enhancing the autophagy level of the myocardium to reduce mitochondrial damage, oxidative stress, and myocardial inflammation in septic rats. Moreover, this study demonstrated that VPA induces autophagy by inhibiting HDAC1- and HDAC3-mediated PTEN expression in the myocardial tissues of septic rats. SIGNIFICANCE This study found that VPA attenuates SIMD through myocardial autophagy acceleration by increasing PTEN expression and inhibiting the AKT/mTOR pathway. These findings preliminarily suggest that VPA may be a potential approach for the intervention and treatment of SIMD.
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Schleifenbaum J. Alamandine and Its Receptor MrgD Pair Up to Join the Protective Arm of the Renin-Angiotensin System. Front Med (Lausanne) 2019; 6:107. [PMID: 31245374 PMCID: PMC6579891 DOI: 10.3389/fmed.2019.00107] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 04/30/2019] [Indexed: 11/18/2022] Open
Abstract
Only a few years ago, alamandine was found to be a member of the protective arm of the renin-angiotensin system. It turned out to be an endogenous ligand of the G protein-coupled receptor MrgD. So far, MrgD had predominantly been studied in a neuronal context. The expression of the receptor in non-neuronal tissue showed hitherto unknown effects mediated by MrgD, most strikingly alamandine-induced vasodilation. Alamandine being a part of the non-classical renin-angiotensin system, a protective role of receptor activation seemed natural. This review summarizes the different effects of MrgD activation by alamandine in vasculature, in the central nervous system, and in organs as kidney and heart. Alamandine and MrgD are promising novel drug targets to protect the kidney and heart through anti-hypertensive actions.
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Affiliation(s)
- Johanna Schleifenbaum
- Institute of Vegetative Physiology, Berlin Institute of Health, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany
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Hekmat AS, Zare N, Moravej A, Meshkibaf MH, Javanmardi K. Effect of Prolonged Infusion of Alamandine on Cardiovascular Parameters and Cardiac ACE2 Expression in a Rat Model of Renovascular Hypertension. Biol Pharm Bull 2019; 42:960-967. [DOI: 10.1248/bpb.b18-00985] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Nahid Zare
- Department of Biochemistry, Fasa University of Medical Sciences
| | - Ali Moravej
- Department of Immunology, Fasa University of Medical Sciences
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Alamandine attenuates arterial remodelling induced by transverse aortic constriction in mice. Clin Sci (Lond) 2019; 133:629-643. [PMID: 30737255 DOI: 10.1042/cs20180547] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 01/19/2019] [Accepted: 02/08/2019] [Indexed: 12/27/2022]
Abstract
Aims: The renin-angiotensin system (RAS) plays an important role in the pathophysiology of vascular diseases, especially as a mediator of inflammation and tissue remodelling. Alamandine (Ala1-angiotensin-(1-7)) is a new biologically active peptide from the RAS, interacting with Mas-related G-protein-coupled receptor member D. Although a growing number of studies reveal the cardioprotective effects of alamandine, there is a paucity of data on its participation in vascular remodelling associated events. In the present study, we investigated the effects of alamandine on ascending aorta remodelling after transverse aortic constriction (TAC) in mice. Methods and results: C57BL/6J male mice were divided into the following groups: Sham (sham-operated), TAC (operated) and TAC+ALA (operated and treated with alamandine-HPβCD (2-Hydroxypropyl-β-cyclodextrin), 30 μg/kg/day, by gavage). Oral administration of alamandine for 14 days attenuated arterial remodelling by decreasing ascending aorta media layer thickness and the cells density in the adventitia induced by TAC. Alamandine administration attenuated ascending aorta fibrosis induced by TAC, through a reduction in the following parameters; total collagen deposition, expression collagen III and transforming growth factor-β (TGF-β) transcripts, matrix metalloproteinases (MMPs) activity and vascular expression of MMP-2. Importantly, alamandine decreased vascular expression of proinflammatory genes as CCL2, tumour necrosis factor α (TNF-α) and interleukin-1β (IL-1β), and was able to increase expression of MRC1 and FIZZ1, pro-resolution markers, after TAC surgery. Conclusion: Alamandine treatment attenuates vascular remodelling after TAC, at least in part, through anti-fibrotic and anti-inflammatory effects. Hence, this work opens new avenues for the use of this heptapeptide also as a therapeutic target for vascular disease.
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60
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de Carvalho Santuchi M, Dutra MF, Vago JP, Lima KM, Galvão I, de Souza-Neto FP, Morais e Silva M, Oliveira AC, de Oliveira FCB, Gonçalves R, Teixeira MM, Sousa LP, dos Santos RAS, da Silva RF. Angiotensin-(1-7) and Alamandine Promote Anti-inflammatory Response in Macrophages In Vitro and In Vivo. Mediators Inflamm 2019; 2019:2401081. [PMID: 30918468 PMCID: PMC6409041 DOI: 10.1155/2019/2401081] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/12/2018] [Accepted: 12/10/2018] [Indexed: 02/06/2023] Open
Abstract
The renin-angiotensin system (RAS) peptides play an important role in inflammation. Resolution of inflammation contributes to restore tissue homeostasis, and it is characterized by neutrophil apoptosis and their subsequent removal by macrophages, which are remarkable plastic cells involved in the pathophysiology of diverse inflammatory diseases. However, the effects of RAS peptides on different macrophage phenotypes are still emerging. Here, we evaluated the effects of angiotensin-(1-7) (Ang-(1-7)) and the most novel RAS peptide, alamandine, on resting (M0), proinflammatory M(LPS+IFN-γ), and anti-inflammatory M(IL-4) macrophage phenotypes in vitro, as well as on specific immune cell populations and macrophage subsets into the pleural cavity of LPS-induced pleurisy in mice. Our results showed that Ang-(1-7) and alamandine, through Mas and MrgD receptors, respectively, do not affect M0 macrophages but reduce the proinflammatory TNF-α, CCL2, and IL-1β transcript expression levels in LPS+IFN-γ-stimulated macrophages. Therapeutic administration of these peptides in LPS-induced inflammation in mice decreased the number of neutrophils and M1 (F4/80lowGr1+CD11bmed) macrophage frequency without affecting the other investigated macrophage subsets. Our data suggested that both Ang-(1-7) and alamandine, through their respective receptors Mas and MrgD, promote an anti-inflammatory reprogramming of M(LPS+IFN-γ)/M1 macrophages under inflammatory circumstances and potentiate the reprogramming induced by IL-4. In conclusion, our work sheds light on the emerging proresolving properties of Ang-(1-7) and alamandine, opening new avenues for the treatment of inflammatory diseases.
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Affiliation(s)
- Melissa de Carvalho Santuchi
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Miriane Fernandes Dutra
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Juliana Priscila Vago
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Kátia Maciel Lima
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Izabela Galvão
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Fernando Pedro de Souza-Neto
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Mario Morais e Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Aline Cristina Oliveira
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | | | - Ricardo Gonçalves
- Department of Pathology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Mauro Martins Teixeira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Lirlândia Pires Sousa
- Department of Clinical and Toxicological Analyses, Faculty of Pharmacy, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Robson Augusto Souza dos Santos
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Rafaela Fernandes da Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Brazil
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Santos RAS, Oudit GY, Verano-Braga T, Canta G, Steckelings UM, Bader M. The renin-angiotensin system: going beyond the classical paradigms. Am J Physiol Heart Circ Physiol 2019; 316:H958-H970. [PMID: 30707614 PMCID: PMC7191626 DOI: 10.1152/ajpheart.00723.2018] [Citation(s) in RCA: 184] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Thirty years ago, a novel axis of the renin-angiotensin system (RAS) was unveiled by the discovery of angiotensin-(1−7) [ANG-(1−7)] generation in vivo. Later, angiotensin-converting enzyme 2 (ACE2) was shown to be the main mediator of this reaction, and Mas was found to be the receptor for the heptapeptide. The functional analysis of this novel axis of the RAS that followed its discovery revealed numerous protective actions in particular for cardiovascular diseases. In parallel, similar protective actions were also described for one of the two receptors of ANG II, the ANG II type 2 receptor (AT2R), in contrast to the other, the ANG II type 1 receptor (AT1R), which mediates deleterious actions of this peptide, e.g., in the setting of cardiovascular disease. Very recently, another branch of the RAS was discovered, based on angiotensin peptides in which the amino-terminal aspartate was replaced by alanine, the alatensins. Ala-ANG-(1−7) or alamandine was shown to interact with Mas-related G protein-coupled receptor D, and the first functional data indicated that this peptide also exerts protective effects in the cardiovascular system. This review summarizes the presentations given at the International Union of Physiological Sciences Congress in Rio de Janeiro, Brazil, in 2017, during the symposium entitled “The Renin-Angiotensin System: Going Beyond the Classical Paradigms,” in which the signaling and physiological actions of ANG-(1−7), ACE2, AT2R, and alatensins were reported (with a focus on noncentral nervous system-related tissues) and the therapeutic opportunities based on these findings were discussed.
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Affiliation(s)
- Robson Augusto Souza Santos
- National Institute of Science and Technology in Nanobiopharmaceutics, Department of Physiology and Biophysics, Federal University of Minas Gerais , Belo Horizonte, Minas Gerais , Brazil
| | - Gavin Y Oudit
- Division of Cardiology, Department of Medicine, Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , Canada
| | - Thiago Verano-Braga
- National Institute of Science and Technology in Nanobiopharmaceutics, Department of Physiology and Biophysics, Federal University of Minas Gerais , Belo Horizonte, Minas Gerais , Brazil
| | - Giovanni Canta
- National Institute of Science and Technology in Nanobiopharmaceutics, Department of Physiology and Biophysics, Federal University of Minas Gerais , Belo Horizonte, Minas Gerais , Brazil
| | - Ulrike Muscha Steckelings
- Department of Molecular Medicine, Cardiovascular & Renal Research, University of Southern Denmark, Odense, Denmark
| | - Michael Bader
- Max Delbrück Center for Molecular Medicine , Berlin , Germany.,Deutsches Zentrum für Herz-Kreislaufforschung, Partner Site Berlin, Berlin , Germany.,Berlin Institute of Health , Berlin , Germany.,Charité-University Medicine, Berlin , Germany.,Institute for Biology, University of Lübeck , Lübeck , Germany
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62
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Liu C, Yang CX, Chen XR, Liu BX, Li Y, Wang XZ, Sun W, Li P, Kong XQ. Alamandine attenuates hypertension and cardiac hypertrophy in hypertensive rats. Amino Acids 2018; 50:1071-1081. [PMID: 29752563 PMCID: PMC6060955 DOI: 10.1007/s00726-018-2583-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 04/27/2018] [Indexed: 12/21/2022]
Abstract
Oral administration of the peptide alamandine has antihypertensive and anti-fibrotic effects in rats. This work aimed to determine whether subcutaneous alamandine injection would attenuate hypertension and cardiac hypertrophy, and improve the function of a major target of hypertension-related damage, the left ventricle (LV), in spontaneously hypertensive rats (SHRs). This was examined in vivo in SHRs and normotensive rats subjected to 6-week subcutaneous infusion of alamandine or saline control, and in vitro in H9C2-derived and primary neonatal rat cardiomyocytes treated with angiotensin (Ang) II to model cardiac hypertrophy. Tail artery blood pressure measurement and transthoracic echocardiography showed that hypertension and impaired LV function in SHRs were ameliorated upon alamandine infusion. Alamandine administration also decreased the mass gains of heart and lung in SHRs, suppressed cardiomyocyte cross-sectional area expansion, and inhibited the mRNA levels of atrial natriuretic peptide and brain natriuretic peptide. The expression of alamandine receptor Mas-related G protein-coupled receptor, member D was increased in SHR hearts and in cardiomyocytes treated with Ang II. Alamandine inhibited the increases of protein kinase A (PKA) levels in the heart in SHRs and in cardiomyocytes treated with Ang II. In conclusion, the present study showed that alamandine administration attenuates hypertension, alleviates cardiac hypertrophy, and improves LV function. PKA signaling may be involved in the mechanisms underlying these effects.
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Affiliation(s)
- Chi Liu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Chuan-Xi Yang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Xi-Ru Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Bo-Xun Liu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Yong Li
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Xiao-Zhi Wang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Wei Sun
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China
| | - Peng Li
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China.
| | - Xiang-Qing Kong
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029, China.
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