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Liu, Cui-Yun; Zhang, Yu-Hui; Li, Rui-Bei; Zhou, Lu-Yu; An, Tao; Zhang, Rong-Cheng; Zhai, Mei; Huang, Yan; Yan, Kao-Wen; Dong, Yan-Han; Ponnusamy, Murugavel; Shan, Chan; Xu, Sheng; Wang, Qi; Zhang, Yan-Hui; Zhang, Jian; Wang, Kun
Nature communications, 01/2018, Volume: 9, Issue: 1Journal Article
Increasing evidence suggests that long noncoding RNAs (lncRNAs) play crucial roles in various biological processes. However, little is known about the effects of lncRNAs on autophagy. Here we report that a lncRNA, termed cardiac autophagy inhibitory factor (CAIF), suppresses cardiac autophagy and attenuates myocardial infarction by targeting p53-mediated myocardin transcription. Myocardin expression is upregulated upon H O and ischemia/reperfusion, and knockdown of myocardin inhibits autophagy and attenuates myocardial infarction. p53 regulates cardiomyocytes autophagy and myocardial ischemia/reperfusion injury by regulating myocardin expression. CAIF directly binds to p53 protein and blocks p53-mediated myocardin transcription, which results in the decrease of myocardin expression. Collectively, our data reveal a novel CAIF-p53-myocardin axis as a critical regulator in cardiomyocyte autophagy, which will be potential therapeutic targets in treatment of defective autophagy-associated cardiovascular diseases.
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