Open AccessSchisandrol A Attenuates Myocardial Ischemia/Reperfusion-Induced Myocardial Apoptosis through Upregulation of 14-3-3θ
Author(s) -
Shuaishuai Gong,
Jincheng Liu,
Shi-Yao Wan,
Weiwei Yang,
Yuanyuan Zhang,
Boyang Yu,
Fang Li,
Junping Kou
Publication year - 2021
Publication title -
oxidative medicine and cellular longevity
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.494
H-Index - 93
eISSN - 1942-0900
pISSN - 1942-0994
DOI - 10.1155/2021/5541753
Subject(s) - apoptosis , downregulation and upregulation , cardioprotection , malondialdehyde , oxidative stress , reactive oxygen species , reperfusion injury , chemistry , pharmacology , gene knockdown , schisandra chinensis , ischemia , medicine , biochemistry , pathology , alternative medicine , traditional chinese medicine , gene
Schisandrol A (SA), one of the most abundant bioactive lignans extracted from the Schisandra chinensis (Turcz.) Baill., has multiple pharmacological properties. However, the underlying mechanisms of SA in protection against myocardial ischemia/reperfusion (MI/R) injury remain obscure. The present experiment was performed to explore the cardioprotective effects of SA in MI/R injury and hypoxia/reoxygenation- (H/R-) induced cardiomyocyte injury and clarify the potential underlying mechanisms. SA treatment significantly improved MI/R injury as reflected by reduced myocardium infarct size, attenuated histological features, and ameliorated biochemical indicators. In the meantime, SA could profoundly ameliorate oxidative stress damage as evidenced by the higher glutathione peroxidase (GSH-Px) as well as lower malondialdehyde (MDA) and reactive oxygen species (ROS). Additionally, SA alleviated myocardial apoptosis as evidenced by a striking reduction of cleaved caspase-3 expression and increase of Bcl-2/Bax ratio. Further experiments demonstrated that SA had certain binding capability to the key functional protein 14-3-3 θ . Mechanistically, SA prevented myocardial apoptosis through upregulating 14-3-3 θ expression. Interestingly, siRNA against 14-3-3 θ could promote apoptosis of cardiomyocytes, and H/R injury after knockdown of 14-3-3 θ could further aggravate apoptosis, while overexpression of 14-3-3 θ could significantly reduce apoptosis induced by H/R injury. Further, 14-3-3 θ siRNA markedly weakened the antiapoptotic role of SA. Our results demonstrated that SA could exert apparent cardioprotection against MI/R injury and H/R injury, and potential mechanisms might be associated with inhibition of cardiomyocyte apoptosis at least partially through upregulation of 14-3-3 θ .