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Du L, Chen J, Wu Y, Xia G, Chen M, Zhao P, Wang Y, Yao D, Liu F, Zhang L, Wang X, Yang Y, Wang L. Long Non-coding RNA N1LR Protects Against Myocardial Ischemic/Reperfusion Injury Through Regulating the TGF-β Signaling Pathway. Front Cardiovasc Med 2021; 8:654969. [PMID: 34485393 PMCID: PMC8414635 DOI: 10.3389/fcvm.2021.654969] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 07/12/2021] [Indexed: 11/13/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) have been shown to play critical roles in various cell biological processes. However, the mechanism of lncRNAs in acute myocardial infarction (AMI) is not fully understood. Previous studies showed that lncRNA N1LR was down-regulated in ischemic cerebral stroke and its up-regulation was protective. The current study was designed to assess the protective effect of N1LR and further to explore potential mechanisms of N1LR in ischemic/reperfusion (I/R) injury after AMI. Male C57BL/6J mice and H9c2 cardiomyocytes were selected to construct in vivo and in vitro pathological models. In H9c2 cell line, N1LR expression was markedly decreased after H2O2 and CoCl2 treatments and N1LR overexpression alleviated apoptosis, inflammation reaction, and LDH release in cardiomyocytes treated with H2O2 and CoCl2. Mouse in vivo study showed that overexpression of N1LR enhanced cardiac function and suppressed inflammatory response and fibrosis. Mechanistically, we found that the expression of transforming growth factor (TGF)-β1 and smads were significantly decreased in the N1LR overexpression group exposed to H2O2. In a summary, our study indicated that N1LR can act as a protective factor against cardiac ischemic-reperfusion injury through regulating the TGF-β/Smads signaling pathway.
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Affiliation(s)
- Lin Du
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China.,Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Jie Chen
- Department of Gastroenterology, Northern Jiangsu Province People's Hospital, Yangzhou University, Yangzhou, China
| | - Yong Wu
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Guangwei Xia
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Mingxing Chen
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Pei Zhao
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Yao Wang
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Deshan Yao
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Fan Liu
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Lina Zhang
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Xue Wang
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Yi Yang
- Department of Cardiology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Liansheng Wang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, China
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Guo Y, Li Z, Shi C, Li J, Yao M, Chen X. Trichostatin A attenuates oxidative stress-mediated myocardial injury through the FoxO3a signaling pathway. Int J Mol Med 2017; 40:999-1008. [PMID: 28849190 PMCID: PMC5593460 DOI: 10.3892/ijmm.2017.3101] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Accepted: 08/03/2017] [Indexed: 11/06/2022] Open
Abstract
Trichostatin A (TSA), a histone deacetylase inhibitor, is widely used as an anticancer drug. Recently, TSA has been shown to exert a protective effect on ischemia/reperfusion (I/R) injury; however, the underlying mechanisms remain unclear. Forkhead box O3a (FoxO3a), a unique FoxO family member, has been shown to attenuate myocardial injury by increasing resistance to oxidative stress in mice. The present study aimed to investigate whether TSA exerts its cardioprotective effects through the FoxO3a signaling pathway. For this purpose, healthy male Wistar rats were pre-treated with TSA for 5 days before they were subjected to ligation/relaxation of the left anterior descending branch of the coronary artery and to 30 min of ischemia, followed by 24 h of reperfusion. The activities of creatine kinase (CK), lactate dehydrogenase (LDH), aspartate aminotransferase (AST) and superoxide diamutase (SOD), as well as the malondialdehyde (MDA) levels were examined. The H9c2 rat myocardial cell line was cultured in 10% FBS-containing DMEM for 24 h. The cells were incubated with/without TSA (50 nmol/l) for 1 h and then incubated with/without H2O2 (400 µM) for 2 h. Reactive oxygen species (ROS) and mitochondrial membrane potential (Δψm) were measured by probe staining in the H9c2 cells. The expression of FoxO3a, mitochondrial SOD2 and catalase was quantified by western blot analysis. The levels of H3 and H4 acetylation of the FoxO3a promoter region were examined by chromatin immunoprecipitation assay. TSA significantly reduced the myocardial infarct size and the activities of serum LDH, AST and CK in the rats. TSA also decreased the levels of MDA and increased the activities of SOD in the myocardial tissue of the rats. Consistent with the reduced injury to the TSA-treated rats, TSA significantly reduced the H2O2-induced levels of ROS and increased Δψm. In addition, TSA increased the expression of FoxO3a, SOD2 and catalase, which may be related to increasing the level of H4 acetylation of the FoxO3a promoter region. Our results thus revealed that TSA protected the myocardium from oxidative stress-mediated damage by increasing H4 acetylation of the FoxO3a promoter region, and the expression of FoxO3a, SOD2 and catalase.
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Affiliation(s)
- Yunhui Guo
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Zhiping Li
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Canxia Shi
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Jia Li
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Meng Yao
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, P.R. China
| | - Xia Chen
- Department of Pharmacology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, P.R. China
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