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Wu Y, Lin Y, Liu B, Ma J, Xiang Y, Wang Y, Meng S. Shexiang Tongxin dropping pill ameliorates microvascular obstruction via downregulating ALOX12 after myocardial ischemia-reperfusion. Int J Cardiol 2024; 416:132481. [PMID: 39179033 DOI: 10.1016/j.ijcard.2024.132481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 08/04/2024] [Accepted: 08/20/2024] [Indexed: 08/26/2024]
Abstract
BACKGROUND Microvascular dysfunction (MVD) is common in patients with myocardial infarction receiving reperfusion therapy and is associated with adverse cardiac prognosis. Accumulating evidence suggests a protective role of Shexiang Tongxin dropping pill (STDP) in MVD. However, the specific effects and the underlying mechanisms of STDP in the context of MVD after myocardial ischemia-reperfusion (IR) remains unclear. AIMS We aimed to elucidate the role of STDP in MVD induced by IR and the potential mechanisms involved. METHODS Mice were orally administered with STDP or normal saline for 5 days before receiving myocardial IR. Cardiac function and microvascular obstruction was measured. Proteomics and single-cell RNA sequencing was performed on mouse hearts. In vitro hyoxia/reoxygenation model was established on mouse cardiac microvascular endothelial cells (MCMECs). RESULTS STDP improved cardiac function and decreased microvascular obstruction (MVO) in mice after myocardial IR. Proteomics identified ALOX12 as an important target of STDP. Single-cell RNA sequencing further revealed that downregulation of ALOX12 by STDP mainly occurred in endothelial cells. The involvement of ALOX12 in the effect of STDP on MVO was validated by manipulating ALOX12 via endothelial-specific adeno-associated virus transfection in vivo and in vitro. In vivo, overexpression of ALOX12 increased whereas knockdown of ALOX12 decreased MVO and thrombus formation. STDP treatment alleviated the detrimental effects of overexpression of ALOX12. In vitro, overexpression of ALOX12 increased endothelial cell inflammation and platelet adhesion to endothelial cells, which was abolished by STDP treatment. CONCLUSION Our findings suggest that STDP alleviates MVO after IR, with ALOX12 playing a crucial role.
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Affiliation(s)
- Yuanhao Wu
- Medical School Of Xinhua Hospital Affiliated To Shanghai Jiao Tong University School Of Medicine, Shanghai, China
| | - Yanjun Lin
- Medical School Of Xinhua Hospital Affiliated To Shanghai Jiao Tong University School Of Medicine, Shanghai, China; Xinhua Hospital Affiliated To Shanghai Jiao Tong University School Of Medicine, Shanghai, China
| | - Bo Liu
- Xinhua Hospital Affiliated To Shanghai Jiao Tong University School Of Medicine, Shanghai, China
| | - Jingqing Ma
- Medical School Of Xinhua Hospital Affiliated To Shanghai Jiao Tong University School Of Medicine, Shanghai, China
| | - Yin Xiang
- Xinhua Hospital Affiliated To Shanghai Jiao Tong University School Of Medicine, Shanghai, China
| | - Yuepeng Wang
- Xinhua Hospital Affiliated To Shanghai Jiao Tong University School Of Medicine, Shanghai, China.
| | - Shu Meng
- Xinhua Hospital Affiliated To Shanghai Jiao Tong University School Of Medicine, Shanghai, China.
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Liu T, Hao Y, Zhang Z, Zhou H, Peng S, Zhang D, Li K, Chen Y, Chen M. Advanced Cardiac Patches for the Treatment of Myocardial Infarction. Circulation 2024; 149:2002-2020. [PMID: 38885303 PMCID: PMC11191561 DOI: 10.1161/circulationaha.123.067097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Myocardial infarction is a cardiovascular disease characterized by a high incidence rate and mortality. It leads to various cardiac pathophysiological changes, including ischemia/reperfusion injury, inflammation, fibrosis, and ventricular remodeling, which ultimately result in heart failure and pose a significant threat to global health. Although clinical reperfusion therapies and conventional pharmacological interventions improve emergency survival rates and short-term prognoses, they are still limited in providing long-lasting improvements in cardiac function or reversing pathological progression. Recently, cardiac patches have gained considerable attention as a promising therapy for myocardial infarction. These patches consist of scaffolds or loaded therapeutic agents that provide mechanical reinforcement, synchronous electrical conduction, and localized delivery within the infarct zone to promote cardiac restoration. This review elucidates the pathophysiological progression from myocardial infarction to heart failure, highlighting therapeutic targets and various cardiac patches. The review considers the primary scaffold materials, including synthetic, natural, and conductive materials, and the prevalent fabrication techniques and optimal properties of the patch, as well as advanced delivery strategies. Last, the current limitations and prospects of cardiac patch research are considered, with the goal of shedding light on innovative products poised for clinical application.
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Affiliation(s)
- Tailuo Liu
- Laboratory of Cardiac Structure and Function, Institute of Cardiovascular Diseases (T.L., Y.H., H.Z., S.P., D.Z., Y.C., M.C.), West China Hospital, Sichuan University, Chengdu, PR China
- Department of Cardiology (T.L., S.P., D.Z., M.C.), West China Hospital, Sichuan University, Chengdu, PR China
- Medicine and Engineering Interdisciplinary Research Laboratory of Nursing & Materials, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, PR China (T.L., K.L., Y.C.)
| | - Ying Hao
- Laboratory of Cardiac Structure and Function, Institute of Cardiovascular Diseases (T.L., Y.H., H.Z., S.P., D.Z., Y.C., M.C.), West China Hospital, Sichuan University, Chengdu, PR China
| | - Zixuan Zhang
- West China School of Public Health/West China Fourth Hospital, Sichuan University, Chengdu, PR China (Z.Z.)
| | - Hao Zhou
- Laboratory of Cardiac Structure and Function, Institute of Cardiovascular Diseases (T.L., Y.H., H.Z., S.P., D.Z., Y.C., M.C.), West China Hospital, Sichuan University, Chengdu, PR China
| | - Shiqin Peng
- Department of Cardiology (T.L., S.P., D.Z., M.C.), West China Hospital, Sichuan University, Chengdu, PR China
| | - Dingyi Zhang
- Department of Cardiology (T.L., S.P., D.Z., M.C.), West China Hospital, Sichuan University, Chengdu, PR China
| | - Ka Li
- Medicine and Engineering Interdisciplinary Research Laboratory of Nursing & Materials, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, PR China (T.L., K.L., Y.C.)
| | - Yuwen Chen
- Medicine and Engineering Interdisciplinary Research Laboratory of Nursing & Materials, West China Hospital, Sichuan University/West China School of Nursing, Sichuan University, Chengdu, PR China (T.L., K.L., Y.C.)
| | - Mao Chen
- Department of Cardiology (T.L., S.P., D.Z., M.C.), West China Hospital, Sichuan University, Chengdu, PR China
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Rafiudeen R, Barlis P, White HD, van Gaal W. Type 2 MI and Myocardial Injury in the Era of High-sensitivity Troponin. Eur Cardiol 2022; 17:e03. [PMID: 35284006 PMCID: PMC8900132 DOI: 10.15420/ecr.2021.42] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 10/21/2021] [Indexed: 11/21/2022] Open
Abstract
Troponin has been the cornerstone of the definition of MI since its introduction to clinical practice. High-sensitivity troponin has allowed clinicians to detect degrees of myocardial damage at orders of magnitude smaller than previously and is challenging the definitions of MI, with implications for patient management and prognosis. Detection and diagnosis are no doubt enhanced by the greater sensitivity afforded by these markers, but perhaps at the expense of specificity and clarity. This review focuses on the definitions, pathophysiology, prognosis, prevention and management of type 2 MI and myocardial injury. The five types of MI were first defined in 2007 and were recently updated in 2018 in the fourth universal definition of MI. The authors explore how this pathophysiological classification is used in clinical practice, and discuss some of the unanswered questions in this era of availability of high-sensitivity troponin.
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Affiliation(s)
- Rifly Rafiudeen
- Department of Cardiology, The Northern Hospital, Melbourne, Australia; Department of Medicine, The University of Melbourne, Melbourne, Australia
| | - Peter Barlis
- Department of Cardiology, The Northern Hospital, Melbourne, Australia; Department of Medicine, The University of Melbourne, Melbourne, Australia
| | - Harvey D White
- Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand
| | - William van Gaal
- Department of Cardiology, The Northern Hospital, Melbourne, Australia; Department of Medicine, The University of Melbourne, Melbourne, Australia
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Yang HQ, Zhou P, Wang LP, Zhao YT, Ren YJ, Guo YB, Xu M, Wang SQ. Compartmentalized β1-adrenergic signalling synchronizes excitation-contraction coupling without modulating individual Ca2+ sparks in healthy and hypertrophied cardiomyocytes. Cardiovasc Res 2020; 116:2069-2080. [PMID: 32031586 DOI: 10.1093/cvr/cvaa013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/20/2019] [Accepted: 01/30/2020] [Indexed: 12/21/2022] Open
Abstract
AIMS β-adrenergic receptors (βARs) play pivotal roles in regulating cardiac excitation-contraction (E-C) coupling. Global signalling of β1ARs up-regulates both the influx of Ca2+ through sarcolemmal L-type Ca2+ channels (LCCs) and the release of Ca2+ from the sarcoplasmic reticulum (SR) through the ryanodine receptors (RyRs). However, we recently found that β2AR stimulation meditates 'offside compartmentalization', confining β1AR signalling into subsarcolemmal nanodomains without reaching SR proteins. In the present study, we aim to investigate the new question, whether and how compartmentalized β1AR signalling regulates cardiac E-C coupling. METHODS AND RESULTS By combining confocal Ca2+ imaging and patch-clamp techniques, we investigated the effects of compartmentalized βAR signalling on E-C coupling at both cellular and molecular levels. We found that simultaneous activation of β2 and β1ARs, in contrast to global signalling of β1ARs, modulated neither the amplitude and spatiotemporal properties of Ca2+ sparks nor the kinetics of the RyR response to LCC Ca2+ sparklets. Nevertheless, by up-regulating LCC current, compartmentalized β1AR signalling synchronized RyR Ca2+ release and increased the functional reserve (stability margin) of E-C coupling. In circumstances of briefer excitation durations or lower RyR responsivity, compartmentalized βAR signalling, by increasing the intensity of Ca2+ triggers, helped stabilize the performance of E-C coupling and enhanced the Ca2+ transient amplitude in failing heart cells. CONCLUSION Given that compartmentalized βAR signalling can be induced by stress-associated levels of catecholamines, our results revealed an important, yet unappreciated, heart regulation mechanism that is autoadaptive to varied stress conditions.
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Affiliation(s)
- Hua-Qian Yang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, 5 Yiheyuan Rd, Beijing 100871, China
| | - Peng Zhou
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, 5 Yiheyuan Rd, Beijing 100871, China
| | - Li-Peng Wang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, 5 Yiheyuan Rd, Beijing 100871, China
| | - Yan-Ting Zhao
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, 5 Yiheyuan Rd, Beijing 100871, China
| | - Yu-Jie Ren
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, 5 Yiheyuan Rd, Beijing 100871, China
| | - Yun-Bo Guo
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, 5 Yiheyuan Rd, Beijing 100871, China
| | - Ming Xu
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, 5 Yiheyuan Rd, Beijing 100871, China
| | - Shi-Qiang Wang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, 5 Yiheyuan Rd, Beijing 100871, China
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Lu Q, Liu P, Huo JH, Wang YN, Ma AQ, Yuan ZY, Du XJ, Bai L. Cardiac rupture complicating acute myocardial infarction: the clinical features from an observational study and animal experiment. BMC Cardiovasc Disord 2020; 20:409. [PMID: 32912149 PMCID: PMC7488297 DOI: 10.1186/s12872-020-01683-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 08/25/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Cardiac rupture (CR) is a fatal complication of ST-elevation myocardial infarction (STEMI) with its incidence markedly declined in the recent decades. However, clinical features of CR patients now and the effect of reperfusion therapy to CR remain unclear. We investigated the clinical features of CR in STEMI patients and the effect of reperfusion therapy to CR in mice. METHODS Two studies were conducted. In clinical study, data of 1456 STEMI patients admitted to the First Hospital, Xi'an Jiaotong University during 2015.12. ~ 2018.12. were analyzed. In experimental study, 83 male C57BL/6 mice were operated to induce MI. Of them, 39 mice were permanent MI (group-1), and remaining mice received reperfusion after 1 h ischemia (21 mice, group-2) or 4 h ischemia (23 mice, group-3). All operated mice were monitored up to day-10. Animals were inspected three times daily for the incidence of death and autopsy was done for all mice found died to determine the cause of death. RESULTS CR was diagnosed in 40 patients: free-wall rupture in 17, ventricular septal rupture in 20, and combined locations in 3 cases. CR presented in 19 patients at admission and diagnosed in another 21 patients during 1 ~ 14 days post-STEMI, giving an in-hospital incidence of 1.4%. The mortality of CR patients was high during hospitalization accounting for 39% of total in-hospital death. By multivariate logistic regression analysis, older age, peak CK-MB and peak hs-CRP were independent predictors of CR post-STEMI. In mice with non-reperfused MI, 17 animals (43.6%) died of CR that occurred during 3-6 days post-MI. In MI mice received early or delayed reperfusion, all mice survived to the end of experiment except one mouse died of acute heart failure. CONCLUSION CR remains as a major cause of in-hospital death in STEMI patients. CR patients are characterized of being elderly, having larger infarct and more server inflammation. Experimentally, reperfusion post-MI prevented CR.
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Affiliation(s)
- Qun Lu
- Department of Cardiovascular Medicine, First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, No.277 Yanta West Road, Xi'an, Shaanxi, 710061, P.R. China.
| | - Ping Liu
- Department of Cardiovascular Medicine, First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, No.277 Yanta West Road, Xi'an, Shaanxi, 710061, P.R. China
| | - Jian-Hua Huo
- Department of Cardiovascular Medicine, First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, No.277 Yanta West Road, Xi'an, Shaanxi, 710061, P.R. China
| | - Yan-Ni Wang
- Department of Cardiovascular Medicine, First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, No.277 Yanta West Road, Xi'an, Shaanxi, 710061, P.R. China
| | - Ai-Qun Ma
- Department of Cardiovascular Medicine, First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, No.277 Yanta West Road, Xi'an, Shaanxi, 710061, P.R. China
| | - Zu-Yi Yuan
- Department of Cardiovascular Medicine, First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, No.277 Yanta West Road, Xi'an, Shaanxi, 710061, P.R. China
| | - Xiao-Jun Du
- Experimental Cardiology Lab, Baker Heart and Diabetes Institute, 75 Commercial Road, Melbourne, Victoria, 3004, Australia. .,College of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shannxi Province, P.R. China.
| | - Ling Bai
- Department of Cardiovascular Medicine, First Affiliated Hospital, School of Medicine of Xi'an Jiaotong University, No.277 Yanta West Road, Xi'an, Shaanxi, 710061, P.R. China
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Li LL, Guo QJ, Lou HY, Liang JH, Yang Y, Xing X, Li HT, Han J, Shen S, Li H, Ye H, Di Wu H, Cui B, Wang SQ. Nanobar Array Assay Revealed Complementary Roles of BIN1 Splice Isoforms in Cardiac T-Tubule Morphogenesis. NANO LETTERS 2020; 20:6387-6395. [PMID: 32787151 PMCID: PMC8486496 DOI: 10.1021/acs.nanolett.0c01957] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Bridging integrator-1 (BIN1) is a family of banana-shaped molecules implicated in cell membrane tubulation. To understand the curvature sensitivity and functional roles of BIN1 splicing isoforms, we engineered vertical nanobars on a cell culture substrate to create high and low curvatures. When expressed individually, BIN1 isoforms with phosphoinositide-binding motifs (pBIN1) appeared preferentially at high-curvature nanobar ends, agreeing well with their membrane tubulation in cardiomyocytes. In contrast, the ubiquitous BIN1 isoform without phosphoinositide-binding motif (uBIN1) exhibited no affinity to membranes around nanobars but accumulated along Z-lines in cardiomyocytes. Importantly, in pBIN1-uBIN1 coexpression, pBIN1 recruited uBIN1 to high-curvature membranes at nanobar ends, and uBIN1 attached the otherwise messy pBIN1 tubules to Z-lines. The complementary cooperation of BIN1 isoforms (comboBIN1) represents a novel mechanism of T-tubule formation along Z-lines in cardiomyocytes. Dysregulation of BIN1 splicing, e.g., during myocardial infarction, underlied T-tubule disorganization, and correction of uBIN1/pBIN1 stoichiometry rescued T-tubule morphology in heart disease.
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Affiliation(s)
- Lin-Lin Li
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
- National Laboratory of Pattern Recognition, Institute of Automation, Chinese Academy of Sciences, Beijing 100190, China
| | - Qian-Jin Guo
- State Key Laboratory of Membrane Biology, Institute of Molecular Medicine, Peking University, Beijing 100871, China
| | - Hsin-Ya Lou
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Jing-Hui Liang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Yang Yang
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Xin Xing
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Hong-Tao Li
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Jing Han
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Shan Shen
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Hui Li
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Haihong Ye
- Department of Medical Genetics and Developmental Biology, School of Basic Medical Sciences, Beijing Key Laboratory of Neural Regeneration and Repair, Capital Medical University, Beijing 100069, China
| | - Hao Di Wu
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Bianxiao Cui
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Shi-Qiang Wang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
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7
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Feng Y, Li M, Wang S, Cong W, Hu G, Song Y, Xiao H, Dong E, Zhang Y. Paired box 6 inhibits cardiac fibroblast differentiation. Biochem Biophys Res Commun 2020; 528:561-566. [PMID: 32505347 DOI: 10.1016/j.bbrc.2020.05.146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 05/13/2020] [Indexed: 01/09/2023]
Abstract
Cardiac fibroblast (CF) differentiation plays a crucial role in cardiac fibrosis, which is a specific manifestation distinguishing pathological cardiac hypertrophy from physiological hypertrophy. The DNA-binding activity of paired box 6 (Pax6) has been shown to be oppositely regulated in physiological and pathological hypertrophy; however, it remains unclear whether Pax6 is involved in CF differentiation during cardiac fibrosis. We found that Pax6 is expressed in the heart of and CFs isolated from adult mice. Moreover, angiotensin II (Ang II) induced the downregulation of Pax6 mRNA and protein expression in fibrotic heart tissue and cardiac myofibroblasts. Pax6 knockdown in CFs promoted the expression of the myofibroblast marker α-smooth muscle actin (α-SMA) and the synthesis of the extracellular matrix (ECM) proteins collagen I and fibronectin. Furthermore, we validated the ability of Pax6 to bind to the promoter regions of Cxcl10 and Il1r2 and the intronic region of Tgfb1. Pax6 knockdown in CFs decreased CXC chemokine 10 (CXCL10) and interleukin-1 receptor 2 (IL-1R2) expression and increased transforming growth factor β1 (TGFβ1) expression, mimicking the effects of Ang II. In conclusion, Pax6 exerts an inhibitory effect on CF differentiation and ECM synthesis by transcriptionally activating the expression of the anti-fibrotic factors CXCL10 and IL-1R2 and repressing the expression of the pro-fibrotic factor TGFβ1. Therefore, maintaining Pax6 expression in CFs is essential for preventing CF differentiation, and provides a new therapeutic target for cardiac fibrosis.
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Affiliation(s)
- Yenan Feng
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
| | - Mingzhe Li
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
| | - Shuaixing Wang
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
| | - Wenwen Cong
- Key Laboratory of Xinjiang Endemic and Ethnic Diseases, Department of Physiology, School of Medicine Shihezi University, Shihezi, 832000, China.
| | - Guomin Hu
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
| | - Yao Song
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
| | - Han Xiao
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
| | - Erdan Dong
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
| | - Youyi Zhang
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
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8
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Zhang JJ, Wang LP, Li RC, Wang M, Huang ZH, Zhu M, Wang JX, Wang XJ, Wang SQ, Xu M. Abnormal expression of miR-331 leads to impaired heart function. Sci Bull (Beijing) 2019; 64:1011-1017. [PMID: 36659800 DOI: 10.1016/j.scib.2019.05.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 04/23/2019] [Accepted: 04/30/2019] [Indexed: 01/21/2023]
Abstract
MicroRNAs (miRNAs) play important roles in maintaining normal heart function. Abnormal expression of miR-331 has been observed in the hearts of patients with atrial fibrillation and Marfan syndrome. However, whether miR-331 regulates cardiac function under physiological and pathological conditions still remains unknown. In the present study, we investigated the function and underlying mechanisms of miR-331 in a pressure overload-induced heart failure model and miR-331 transgenic rat model. First, we found that the expression of miR-331-3p exhibited a 1.7-fold increase in hypertrophy compared with that in the sham group (P < 0.01), yet the expression of miR-331-5p remained unchanged. Furthermore, overexpression of miR-331 in cardiomyocytes and defective excitation-contraction (E-C) coupling efficiency were observed. Luciferase assays showed that miR-331-3p suppressed JPH2 expression by binding to the coding region of JPH2 mRNA. Finally, in the miR-331 transgenic rat model, JPH2 expression was suppressed at both the mRNA and protein levels in vivo, which resulted in impairment of both the E-C coupling efficiency of cardiomyocytes and systolic function of the heart. This finding mechanistically linked miR-331 to JPH2 downregulation and suggested an important role for the abnormal expression of miR-331 leading to the dysfunction of E-C coupling in heart failure.
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Affiliation(s)
- Jin-Jing Zhang
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China
| | - Li-Peng Wang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Rong-Chang Li
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China
| | - Meng Wang
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Zeng-Hui Huang
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Zhu
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China
| | - Jia-Xing Wang
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China
| | - Xiu-Jie Wang
- Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shi-Qiang Wang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing 100871, China.
| | - Ming Xu
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing Key Laboratory of Cardiovascular Receptors Research, State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China.
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9
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Relaxin mitigates microvascular damage and inflammation following cardiac ischemia-reperfusion. Basic Res Cardiol 2019; 114:30. [PMID: 31218471 DOI: 10.1007/s00395-019-0739-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 06/14/2019] [Indexed: 02/07/2023]
Abstract
Microvascular obstruction (MVO) and leakage (MVL) forms a pivotal part of microvascular damage following cardiac ischemia-reperfusion (IR). We tested the effect of relaxin therapy on MVO and MVL in mice following cardiac IR injury including severity of MVO and MVL, opening capillaries, infarct size, regional inflammation, cardiac function and remodelling, and permeability of cultured endothelial monolayer. Compared to vehicle group, relaxin treatment (50 μg/kg) reduced no-reflow area by 38% and the content of Evans blue as a permeability tracer by 56% in jeopardized myocardium (both P < 0.05), effects associated with increased opening capillaries. Relaxin also decreased leukocyte density, gene expression of cytokines, and mitigated IR-induced decrease in protein content of VE-cadherin and relaxin receptor. Infarct size was comparable between the two groups. At 2 weeks post-IR, relaxin treatment partially preserved cardiac contractile function and limited chamber dilatation versus untreated controls by echocardiography. Endothelial cell permeability assay demonstrated that relaxin attenuated leakage induced by hypoxia-reoxygenation, H2O2, or cytokines, action that was independent of nitric oxide but associated with the preservation of VE-cadherin. In conclusion, relaxin therapy attenuates IR-induced MVO and MVL and endothelial leakage. This protection was associated with reduced regional inflammatory responses and consequently led to alleviated adverse cardiac remodeling.
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