Protective effect of miR378* on doxorubicin‐induced cardiomyocyte injury via calumenin

作者：Yu Wang, Xiaoxue Cui, Yilin Wang, Yao Fu, Xin Guo, Jie Long, Cheng‐Xi Wei, Ming Zhao · 发表于：Journal of Cellular Physiology · 年份：2018 · DOI：10.1002/jcp.26615 · 被引用次数：23 · 研究领域：Chemotherapy-induced cardiotoxicity and mitigation、Cell death mechanisms and regulation、Sirtuins and Resveratrol in Medicine

Doxorubicin (Dox) is a highly effective antitumor antibiotic, however myocardial toxicity severely limits its use clinically. The pathogenesis of doxorubicin-induced cardiomyopathy is unclear. In Dox cardiomyopathy mice, there is a decline in cardiac function, a change in myocardial pathology and a reduction in miR378* expression. Expression changes in calumenin, an endoplasmic reticulum stress (ERS) chaperone protein and pathway factor, as well as apoptosis, were observed in cardiomyocytes after doxorubicin-induced injury. However, miR378* increased calumenin expression, eased ERS, and reduced cardiomyocyte apoptosis, while, silencing miR378* reduced calumenin expression, aggravated ERS, and increased cardiomyocyte apoptosis. The above results indicate that miR378* alleviates ERS and inhibits the activation of the ERS-mediated apoptosis signaling pathway in cardiomyocytes via regulating calumenin expression, thereby reducing cardiomyocyte apoptosis after doxorubicin-induced injury. Increasing miR378* expression may be a new way to improve cardiac function and quality of life in patients with Dox cardiomyopathy.