Wenyi Wang1, Yashu Zheng2, Miao Wang2, Meiling Yan3, Jiechun Jiang4, Zhigang Li5. 1. International Medical Center, Tianjin First Central Hospital, Tianjin, China. Electronic address: wenyiwang2010@sina.com. 2. International Medical Center, Tianjin First Central Hospital, Tianjin, China. 3. Department of Pharmacy, Tianjin First Central Hospital, Tianjin, China. 4. Clinical Laboratory, Tianjin First Central Hospital, Tianjin, China. 5. International Medical Center, Tianjin First Central Hospital, Tianjin, China. Electronic address: tfclzg@163.com.
Abstract
AIMS: Acute myocardial infarction is one of the most threaten disease in the world. In previous studies, exosome derived miR-126 has been verified that exert an pro-angiogenic function through exosomal transfer. However, the function of miR-126 in ischemic reperfusion injury remains unknown. The aim of the study was to investigate the function and mechanism of miR-126 in ischemic reperfusion injury. METHODS: H2O2 and CoCl2-treated neonatal rat ventricular cardiomyocytes were used to analyze the function of miR-126 in vitro. Tunel, JC-1, ROS, LDH and cell survival rates were detected to evaluate the function of miR-126. Rat acute myocardial infarction was performed to elucidate the function of miR-126 in vivo. RESULTS: We found that miR-126 could reduce the apoptosis and improved cell survival of H2O2-treated and CoCl2-treated neonatal rat ventricular cardiomyocytes. MiR-126 also attenuates the ROS elevation and mitochondrial membrane potential through JC-1 detection. miR-126 also improved the cardiac function in vivo. Luciferase activity revealed that miR-126 could bind to ERRFI1, suggesting miR-126 functioned through regulating ERRFI1. CONCLUSION: We verified the function and mechanism of miR-126 and provide evidence that miR-126 may play important role in ischemic reperfusion injury, and understanding the precise role of miR-126 will undoubtedly shed new light on the clinical treatment.
AIMS: Acute myocardial infarction is one of the most threaten disease in the world. In previous studies, exosome derived miR-126 has been verified that exert an pro-angiogenic function through exosomal transfer. However, the function of miR-126 in ischemic reperfusion injury remains unknown. The aim of the study was to investigate the function and mechanism of miR-126 in ischemic reperfusion injury. METHODS:H2O2 and CoCl2-treated neonatal rat ventricular cardiomyocytes were used to analyze the function of miR-126 in vitro. Tunel, JC-1, ROS, LDH and cell survival rates were detected to evaluate the function of miR-126. Rat acute myocardial infarction was performed to elucidate the function of miR-126 in vivo. RESULTS: We found that miR-126 could reduce the apoptosis and improved cell survival of H2O2-treated and CoCl2-treated neonatal rat ventricular cardiomyocytes. MiR-126 also attenuates the ROS elevation and mitochondrial membrane potential through JC-1 detection. miR-126 also improved the cardiac function in vivo. Luciferase activity revealed that miR-126 could bind to ERRFI1, suggesting miR-126 functioned through regulating ERRFI1. CONCLUSION: We verified the function and mechanism of miR-126 and provide evidence that miR-126 may play important role in ischemic reperfusion injury, and understanding the precise role of miR-126 will undoubtedly shed new light on the clinical treatment.
Authors: Dongdong Zheng; Ming Huo; Bo Li; Weitie Wang; Hulin Piao; Yong Wang; Zhicheng Zhu; Dan Li; Tiance Wang; Kexiang Liu Journal: Front Cell Dev Biol Date: 2021-01-12