Si-Miao-Yong-An Decoction Maintains the Cardiac Function and Protects Cardiomyocytes from Myocardial Ischemia and Reperfusion Injury

Overview

Journal Evid Based Complement Alternat Med

Specialty Rehabilitation Medicine

Date 2021 Aug 9

PMID 34367308

Citations 9

Authors

Wenwen Cui

Shen Xin

Lingjuan Zhu

Mingye Wang

Yuanyuan Hao

Yuqian Zhao

Yang Li

Yunlong Hou

Affiliations

Soon will be listed here.

Abstract

Objective: The aim of this study was to determine whether Si-Miao-Yong-An decoction (SMYAD) could protect cardiomyocytes from ischemia/reperfusion (I/R) injury and its underlying mechanisms.

Methods: C57BL/6 mice were used to establish a model of myocardial infarction by I/R injury and treated by SMYAD for 4 weeks. Then, the cardiac functions of mice were evaluated by cardiac magnetic resonance (CMR). Histopathological analysis for the heart remodeling was detected by H&E and Masson staining. The protein expression of collagen I, MMP9, and TNF was detected by western blot in the heart tissues. H9C2 cells were used to establish the hypoxia/reoxygenation (H/R) model and SMYAD intervention. MTT assays detected the cell viability of myocardial cells. The expression level of IL-1 was evaluated by ELISA. The expression levels of LC3B-II/LC3B-I, p-mTOR, mTOR, NLRP3, procaspase 1, and cleaved-caspase 1 in H9C2 cells were evaluated by Western blot.

Results: SMYAD improved cardiac functions such as ventricular volume and ejection fraction of the rats with ischemia/reperfusion injury. Morphological assay indicated that SMYAD reduced the scar size and inhibited fibrosis formation. It was found that SMYAD could regulate collagen I, MMP9, and TNF protein expression levels in the heart tissues. SMYAD improved the survival rate of H9C2 cardiomyocytes in the H/R injury model. SMYAD elevated the rate of LC3B-II/LC3B-I protein expression, decreased the rate of p-mTOR/mTOR protein expression, and reduced expressions of caspase 1, NLRP3, and IL-1 in H/R cardiomyocytes.

Conclusion: SMYAD exerted protective effects on ischemia/reperfusion injury in myocardial cells by activating autophagy and inhibiting pyroptosis. This might be the reason why SMYAD protected myocardial tissue and improved cardiac function in mice with ischemia/reperfusion.

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