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Sun T, Han Y, Li JL, Wang S, Jing ZJ, Yan Z, Zhou L, Zuo L, Yang JL, Cao JM. Synaptotagmin-7 mediates cardiac hypertrophy by targeting autophagy. FEBS J 2024; 291:489-509. [PMID: 37724442 DOI: 10.1111/febs.16961] [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] [Received: 03/01/2023] [Revised: 09/03/2023] [Accepted: 09/18/2023] [Indexed: 09/20/2023]
Abstract
Sustained cardiac hypertrophy damages the heart and weakens cardiac function, often leading to heart failure and even death. Pathological cardiac hypertrophy has become a central therapeutic target for many heart diseases including heart failure. However, the underlying mechanisms of cardiac hypertrophy, especially the involvement of autophagy program, are still ill-understood. Synaptotagmin-7 (Syt7), a multifunctional and high-affinity calcium sensor, plays a pivotal role in asynchronous neurotransmitter release, synaptic facilitation, and vesicle pool regulation during synaptic transmission. However, little is known about whether Syt7 is expressed in the myocardium and involved in the pathogenesis of heart diseases. Here we showed that Syt7 was significantly upregulated in Ang II-treated hearts and cardiomyocytes. Homozygous syt7 knockout (syt7-/-) mice exhibited significantly attenuated cardiac hypertrophy and fibrosis and improved cardiac function. We further found that Syt7 exerted a pro-hypertrophic effect by suppressing the autophagy process. In exploring the upstream mechanisms, microRNA (miR)-93 was identified to participate in the regulation of Syt7 expression. miR-93 protected hearts against Ang II-induced hypertrophy through targeting Syt7-autophagy pathway. In summary, our data reveal a new cardiac hypertrophy regulator and a novel hypertrophy regulating model composed of miR-93, Syt7 and autophagy program. These molecules may serve as potential therapeutic targets in the treatment of cardiac hypertrophy and heart failure.
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Affiliation(s)
- Teng Sun
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, Taiyuan, China
- Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Yu Han
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, Taiyuan, China
- Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Jia-Lei Li
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, Taiyuan, China
- Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Shuang Wang
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, Taiyuan, China
- Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Zhi-Jie Jing
- Laboratory Animal Research Center of Shanxi Medical University, Taiyuan, China
| | - Zi Yan
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, Taiyuan, China
- Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Lan Zhou
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, Taiyuan, China
- Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Lin Zuo
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, Taiyuan, China
- Department of Physiology, Shanxi Medical University, Taiyuan, China
| | - Jun-Li Yang
- Computer Teaching Department, Shanxi Medical University, Taiyuan, China
| | - Ji-Min Cao
- Key Laboratory of Cellular Physiology at Shanxi Medical University, Ministry of Education, Key Laboratory of Cellular Physiology of Shanxi Province, Taiyuan, China
- Department of Physiology, Shanxi Medical University, Taiyuan, China
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Liang Y, Jie H, Liu Q, Li C, Xiao R, Xing X, Sun J, Yu S, Hu Y, Xu GH. Knockout of circRNA single stranded interacting protein 1 (circRBMS1) played a protective role in myocardial ischemia-reperfusion injury though inhibition of miR-2355-3p/Mammalian Sterile20-like kinase 1 (MST1) axis. Bioengineered 2022; 13:12726-12737. [PMID: 35611768 PMCID: PMC9275998 DOI: 10.1080/21655979.2022.2068896] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Evidence suggests circRBMS1 regulates mRNA to mediate cell apoptosis, inflammation, and oxidative stress in different diseases. MST1 is reported to be the target and activator of apoptosis-related molecules and signaling pathways. Hence, the present study aims to investigate the role of circ-RBMS1/miR-2355-3p/MST1 in the development of I/R injury. In vitro experiments showed increased circ-RBMS1 and decreased miR-2355-3p in H/R-induced HCMs. CircRBMS1 served as a sponge for miR-2355-3p and miR-2355-3p targeted MST1. Furthermore, knockout of circRBMS1 attenuated cell apoptosis, oxidized stress, and inflammation in H/R-induced HCMs. In vivo experiments indicated circRBMS1 knockdown attenuated cardiac function damage, cell apoptosis, oxidative stress injury and inflammatory response through miR-2355-3p/MST1 axis in mice. In summary, these results demonstrated circRBMS1 played a protective role in myocardial I/R injury though inhibition of miR-2355-3p/MST1 axis. It might provide a new therapeutic target for cardiac I/R injury.
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Affiliation(s)
- Yingping Liang
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Huanhuan Jie
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Qin Liu
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Chang Li
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Renjie Xiao
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xianliang Xing
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jing Sun
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Shuchun Yu
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yanhui Hu
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Guo-Hai Xu
- Department of Anesthesiology, Second Affiliated Hospital of Nanchang University, Nanchang, China
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