TY - JOUR AB - MicroRNAs (miRNAs/miRs) have been reported to affect ischemia/reperfusion (I/R)‑induced cerebral damage. miRNAs cause post‑transcriptional gene silencing by binding to the protein‑coding sequence (CDS) of mRNAs. Seipin has a potential role in regulating autophagic flux. The present study investigated the involvement of miR‑187‑3p in Seipin expression, autophagic flux and apoptosis in vitro, as well as the underlying mechanism, using PC12 cells exposed to oxygen‑glucose deprivation/reoxygenation (OGD/R), which mimicked the process of I/R. In comparison with control PC12 cells, OGD/R caused an increase in the level of miR‑187‑3p and a decrease in Seipin protein levels without changes in the level of Seipin mRNA. Using bioinformatics analysis, it was identified that miR‑187‑3p could bind to the CDS of Seipin. miR‑187‑3p inhibitor attenuated the reduction in Seipin protein expression in OGD/R‑treated PC12 cells. Following OGD/R, autophagic flux was reduced and apoptosis was enhanced, which were attenuated by inhibition of miR‑187‑3p. Compared with OGD/R‑treated PC12 cells, Seipin knockdown further impaired autophagic flux and promoted neuronal apoptosis, which were insensitive to inhibition of miR‑187‑3p. Furthermore, treatment with miR‑187‑3p inhibitor could decrease the infarction volume in a rat model of middle cerebral artery occlusion/reperfusion. The present findings indicated that miR‑187‑3p inhibitor attenuated ischemia‑induced cerebral damage by rescuing Seipin expression to improve autophagic flux. AD - Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education, School of Basic Medical Science, Guizhou Medical University, Guiyang, Guizhou 550004, P.R. China Laboratory of Reproductive Medicine, Department of Physiology, Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China AU - Ren,Zhenkui AU - Xie,Peng AU - Lv,Ju AU - Hu,Yumei AU - Guan,Zhizhong  AU - Chen,Ling AU - Yu,Wenfeng DA - 2020/09/01 DO - 10.3892/ijmm.2020.4642 EP - 1062 IS - 3 JO - Int J Mol Med KW - microRNA‑187‑3p Seipin autophagic flux apoptosis ischemia/reperfusion PY - 2020 SN - 1107-3756 1791-244X SP - 1051 ST - miR‑187‑3p inhibitor attenuates cerebral ischemia/reperfusion injury by regulating Seipin‑mediated autophagic flux T2 - International Journal of Molecular Medicine TI - miR‑187‑3p inhibitor attenuates cerebral ischemia/reperfusion injury by regulating Seipin‑mediated autophagic flux UR - https://doi.org/10.3892/ijmm.2020.4642 VL - 46 ER -