Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10750515 | Biochemical and Biophysical Research Communications | 2015 | 8 Pages |
Abstract
This study aimed to explore the effects of puerarin on autophagy in cardiac hypertrophy. Decreased 5â²-adenosine monophosphate kinase (AMPK) activity alone with inhibited autophagy could be detected in rats within 3 weeks after aortic banding (AB). Puerarin treatment for 3 weeks in AB rats significantly restored autophagy. Administration of puerarin for 6 weeks effectively restricted cardiomyocyte hypertrophy and apoptosis. In an in vitro study, similar anti-hypertrophy and anti-apoptosis effects of puerarin on isoprenaline-induced H9c2 cells were also observed. After inhibition of autophagy by pretreatment with 3-methyladenine, the protective effects of puerarin were blocked. Further in vivo study demonstrated that puerarin significantly enabled phosphorylation of 5â²-AMPK to be activated, subsequently inhibiting expression of the mammalian target of rapamycin (mTOR) target proteins S6 ribosomal protein and 4E-binding protein 1. All these data indicate that puerarin exerts protective effects against cardiomyocyte hypertrophy and apoptosis, partly by restoration of autophagy through AMPK/mTOR-mediated signaling.
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Authors
Bei Liu, Zhiye Wu, Yunpeng Li, Caiwen Ou, Zhenjun Huang, Jianwu Zhang, Peng Liu, Chengfeng Luo, Minsheng Chen,