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Zhang X, Liu M, Yang K, Chi J, Chen W, Shi Z, Liu W, Ma X, Yin X. Changes in microRNA expression profiles in diabetic cardiomyopathy rats following H3 relaxin treatment. J Cardiovasc Pharmacol 2021. [PMID: 34983906 DOI: 10.1097/FJC.0000000000001211] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 12/06/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT MicroRNAs (miRNAs) are noncoding RNAs that play an important role in the mechanisms of diabetic cardiomyopathy (DCM); however, whether human recombinant relaxin-3 (H3 relaxin) inhibits myocardial injury in DCM rats and the underlying mechanisms involving miRNAs remain unknown. miRNA expression profiles were detected using miRNA microarray and bioinformatics analyses of myocardial tissues from control, DCM, and H3 relaxin-administered DCM groups, and the regulatory mechanisms of the miRNAs were investigated. A total of five miRNAs were downregulated in the myocardial tissues of DCM rats and upregulated in H3 relaxin-treated DCM rats, and one miRNA (miRNA let-7d-3p) was increased in the myocardial tissue of DCM rats, and decreased in H3 relaxin-treated DCM rats as revealed by miRNA microarray and validated by real-time PCR. Important signaling pathways were found to be triggered by the differentially expressed miRNAs, including metabolism, cancer, Rap1, PI3K-Akt, and MAPK signaling pathways. The study revealed that H3 relaxin improved glucose uptake in DCM rats, potentially via regulation of miRNA let-7d-3p.
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Yang H, Su J, Meng W, Chen X, Xu Y, Sun B. MiR-518a-5p Targets GZMB to Extenuate Vascular Endothelial Cell Injury Induced by Hypoxia-Reoxygenation and Thereby Improves Myocardial Ischemia. Int Heart J 2021; 62:658-665. [PMID: 33994508 DOI: 10.1536/ihj.20-619] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
To probe the function of miR-518a-5p/Granzyme B (GZMB) in hypoxia/reoxygenation (H/R) -induced vascular endothelial cell injury.The key genes of myocardial infarction were screened by bioinformatic methods. The upstream micro RNAs (miRNAs) of GZMB were predicted by TargetScan. The binding of miR-518a-5p to GZMB was verified with luciferase reporter assay. The H/R model was constructed with human vascular endothelial cell (HUVEC) in vitro. Cell Counting Kit-8 (CCK8) assay was performed to detect cell proliferation. Western blot was utilized to evaluate the levels of indicated proteins.GZMB was up-regulated in patients with myocardial infarction and identified as the key gene by the bioinformatics analysis. Then the prediction from TargetScan indicated that miR-518a-5p, which is down-regulated in myocardial infarction patients, might be the potential upstream miRNA for GZMB. The following experiments verified that miR-518a-5p could bind to the 3'UTR of GZMB and negatively modulates GZMB expression. More importantly, the miR-518a-5p mimic enhanced cell proliferation and repressed apoptosis of H/R-injured HUVEC cells by inhibiting GZMB expression.We proved that miR-518a-5p could partly attenuate H/R-induced HUVEC cell injury by targeting GZMB, and perhaps the miR-518a-5p/GZMB axis could be potential therapeutic targets for myocardial infarction.
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Affiliation(s)
- Hui Yang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Harbin Medical University
| | - Jingjing Su
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Harbin Medical University
| | - Weixin Meng
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Harbin Medical University
| | - Xiaoya Chen
- Department of Ultrasound, The First Affiliated Hospital of Harbin Medical University
| | - Ying Xu
- Editorial Department, Journal of Harbin Medical University
| | - Bo Sun
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Harbin Medical University
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Li Q, Freeman LM, Rush JE, Laflamme DP. Expression Profiling of Circulating MicroRNAs in Canine Myxomatous Mitral Valve Disease. Int J Mol Sci 2015; 16:14098-108. [PMID: 26101868 PMCID: PMC4490541 DOI: 10.3390/ijms160614098] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 06/04/2015] [Accepted: 06/09/2015] [Indexed: 12/25/2022] Open
Abstract
MicroRNAs (miRNAs) are small non-coding RNAs that have shown promise as noninvasive biomarkers in cardiac disease. This study was undertaken to investigate the miRNA expression profile in dogs with myxomatous mitral valve disease (MMVD). 277 miRNAs were quantified using RT-qPCR from six normal dogs (American College of Veterinary Internal Medicine Stage A), six dogs with MMVD mild to moderate cardiac enlargement (ACVIM Stage B1/B2) and six dogs with MMVD and congestive heart failure (ACVIM Stage C/D). Eleven miRNAs were differentially expressed (False Discovery Rate < 0.05). Dogs in Stage B1/B2 or C/D had four upregulated miRNAs, including three cfa-let-7/cfa-miR-98 family members, while seven others were downregulated, compared to Stage A. Expression of six of the 11 miRNAs also were significantly different between dogs in Stage C/D and those in Stage B1/B2. The expression changes were greater as disease severity increased. These miRNAs may be candidates for novel biomarkers and may provide insights into genetic regulatory pathways in canine MMVD.
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Affiliation(s)
- Qinghong Li
- Nestle Purina Research, Saint Louis, MO 63164, USA.
| | - Lisa M Freeman
- Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA 01536, USA.
| | - John E Rush
- Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA 01536, USA.
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Wang H, Li J, Chi H, Zhang F, Zhu X, Cai J, Yang X. MicroRNA-181c targets Bcl-2 and regulates mitochondrial morphology in myocardial cells. J Cell Mol Med 2015; 19:2084-97. [PMID: 25898913 PMCID: PMC4568913 DOI: 10.1111/jcmm.12563] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 01/20/2015] [Indexed: 12/21/2022] Open
Abstract
Apoptosis is an important mechanism for the development of heart failure. Mitochondria are central to the execution of apoptosis in the intrinsic pathway. The main regulator of mitochondrial pathway of apoptosis is Bcl-2 family which includes pro- and anti-apoptotic proteins. MicroRNAs are small noncoding RNA molecules that regulate gene expression by inhibiting mRNA translation and/or inducing mRNA degradation. It has been proposed that microRNAs play critical roles in the cardiovascular physiology and pathogenesis of cardiovascular diseases. Our previous study has found that microRNA-181c, a miRNA expressed in the myocardial cells, plays an important role in the development of heart failure. With bioinformatics analysis, we predicted that miR-181c could target the 3' untranslated region of Bcl-2, one of the anti-apoptotic members of the Bcl-2 family. Thus, we have suggested that miR-181c was involved in regulation of Bcl-2. In this study, we investigated this hypothesis using the Dual-Luciferase Reporter Assay System. Cultured myocardial cells were transfected with the mimic or inhibitor of miR-181c. We found that the level of miR-181c was inversely correlated with the Bcl-2 protein level and that transfection of myocardial cells with the mimic or inhibitor of miR-181c resulted in significant changes in the levels of caspases, Bcl-2 and cytochrome C in these cells. The increased level of Bcl-2 caused by the decrease in miR-181c protected mitochondrial morphology from the tumour necrosis factor alpha-induced apoptosis.
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Affiliation(s)
- Hongjiang Wang
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Jing Li
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Hongjie Chi
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Fan Zhang
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Xiaoming Zhu
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Jun Cai
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Xinchun Yang
- Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
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Affiliation(s)
- Priyatansh Gurha
- From the Center for Cardiovascular Genetics, Institute of Molecular Medicine and Department of Medicine, University of Texas Health Sciences Center at Houston, and Texas Heart Institute, Houston, TX
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Bao MH, Feng X, Zhang YW, Lou XY, Cheng Y, Zhou HH. Let-7 in cardiovascular diseases, heart development and cardiovascular differentiation from stem cells. Int J Mol Sci 2013; 14:23086-102. [PMID: 24284400 PMCID: PMC3856107 DOI: 10.3390/ijms141123086] [Citation(s) in RCA: 144] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 10/30/2013] [Accepted: 11/04/2013] [Indexed: 01/08/2023] Open
Abstract
The let-7 family is the second microRNA found in C. elegans. Recent researches have found it is highly expressed in the cardiovascular system. Studies have revealed the aberrant expression of let-7 members in cardiovascular diseases, such as heart hypertrophy, cardiac fibrosis, dilated cardiomyopathy (DCM), myocardial infarction (MI), arrhythmia, angiogenesis, atherosclerosis, and hypertension. Let-7 also participates in cardiovascular differentiation of embryonic stem cells. TLR4, LOX-1, Bcl-xl and AGO1 are by now the identified target genes of let-7. The circulating let-7b is suspected to be the biomarker of acute MI and let-7i, the biomarker of DCM. Further studies are necessary for identifying the gene targets and signaling pathways of let-7 in cardiovascular diseases. Let-7 might be a potential therapeutic target for cardiovascular diseases. This review focuses on the research progresses regarding the roles of let-7 in cardiovascular development and diseases.
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Affiliation(s)
- Mei-Hua Bao
- Institute of Clinical Pharmacology, Central South University, Changsha 410078, China; E-Mails: (M.-H.B.); (Y.-W.Z.); (X.-Y.L.); (Y.C.)
- Department of Pharmacy, Changsha Medical University, Changsha 410219, China
| | - Xing Feng
- College of Medicine, Hunan Normal University, Changsha 410006, China; E-Mail:
| | - Yi-Wen Zhang
- Institute of Clinical Pharmacology, Central South University, Changsha 410078, China; E-Mails: (M.-H.B.); (Y.-W.Z.); (X.-Y.L.); (Y.C.)
| | - Xiao-Ya Lou
- Institute of Clinical Pharmacology, Central South University, Changsha 410078, China; E-Mails: (M.-H.B.); (Y.-W.Z.); (X.-Y.L.); (Y.C.)
| | - Yu Cheng
- Institute of Clinical Pharmacology, Central South University, Changsha 410078, China; E-Mails: (M.-H.B.); (Y.-W.Z.); (X.-Y.L.); (Y.C.)
| | - Hong-Hao Zhou
- Institute of Clinical Pharmacology, Central South University, Changsha 410078, China; E-Mails: (M.-H.B.); (Y.-W.Z.); (X.-Y.L.); (Y.C.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86-731-8480-5380; Fax: +86-731-8235-4476
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Abstract
Since their discovery not long ago, microRNAs (miRNAs) have been extensively studied in hundreds of laboratories around the world. Initially thought of as merely cytoplasmic repressors of mRNA expression, it has since become more apparent that they also play regulatory roles in the nucleus. A recent study published in Nature introduces novel concepts in both miRNA regulation and function by showing that the let-7 miRNA regulates its own expression.
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Affiliation(s)
- Alan Jiao
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, USA
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Bowers SLK, Baudino TA. Cardiac Myocyte–Fibroblast Interactions and the Coronary Vasculature. J Cardiovasc Transl Res 2012; 5:783-93. [DOI: 10.1007/s12265-012-9407-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 08/27/2012] [Indexed: 10/27/2022]
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Das S, Ferlito M, Kent OA, Fox-Talbot K, Wang R, Liu D, Raghavachari N, Yang Y, Wheelan SJ, Murphy E, Steenbergen C. Nuclear miRNA regulates the mitochondrial genome in the heart. Circ Res 2012; 110:1596-603. [PMID: 22518031 DOI: 10.1161/circresaha.112.267732] [Citation(s) in RCA: 256] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
RATIONALE Mitochondria are semiautonomous cellular organelles with their own genome, which not only supply energy but also participate in cell death pathways. MicroRNAs (miRNAs) are usually 19 to 25 nt long, noncoding RNAs, involved in posttranscriptional gene regulation by binding to the 3'-untranslated regions of target mRNA, which impact on diverse cellular processes. OBJECTIVE To determine if nuclear miRNAs translocate into the mitochondria and regulate mitochondrial function with possible pathophysiological implications in cardiac myocytes. METHODS AND RESULTS We find that miR-181c is encoded in the nucleus, assembled in the cytoplasm, and finally translocated into the mitochondria of cardiac myocytes. Immunoprecipitation of Argonaute 2 from the mitochondrial fraction indicates binding of cytochrome c oxidase subunit 1 (mt-COX1) mRNA from the mitochondrial genome with miR-181c. Also, a luciferase reporter construct shows that mi-181c binds to the 3'UTR of mt-COX1. To study whether miR-181c regulates mt-COX1, we overexpressed precursor miR-181c (or a scrambled sequence) in primary cultures of neonatal rat ventricular myocytes. Overexpression of miR-181c did not change mt-COX1 mRNA but significantly decreased mt-COX1 protein, suggesting that miR-181c is primarily a translational regulator of mt-COX1. In addition to altering mt-COX1, overexpression of miR-181c results in increased mt-COX2 mRNA and protein content, with an increase in both mitochondrial respiration and reactive oxygen species generation in neonatal rat ventricular myocytes. Thus, our data show for the first time that miR-181c can enter and target the mitochondrial genome, ultimately causing electron transport chain complex IV remodeling and mitochondrial dysfunction. CONCLUSIONS Nuclear miR-181c translocates into the mitochondria and regulates mitochondrial genome expression. This unique observation may open a new dimension to our understanding of mitochondrial dynamics and the role of miRNA in mitochondrial dysfunction.
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Affiliation(s)
- Samarjit Das
- Department of Pathology, Cardiovascular Division, Johns Hopkins University, Baltimore, MD 21205.
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