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Background   Oleanolic acid (OA) has notable anti-inflammatory and anti-tumor effects, but the role of OA in cerebral ischemia-reperfusion injury (CIRI) has not been reported so far.Methods   Oxygen and glucose deprivation/reoxygenation (OGD/R) model was induced in PC12 cells. MTT assay was used to detect the cell viability of PC12 cells, while ELISA assay detected the expression of TNF-α, IL-1β and IL-6. The expression of superoxide dismutase (SOD), malondialdehyde (MDA) and reactive oxygen species (ROS) was detected by the appropriate kits, and cell apoptosis by Tunel technique. Western blot assay detected the expression of apoptosis-related proteins. The cell transfection technique overexpressed miR-142‐5p. After overexpressing miR-142‐5p by cell transfection technique, the expression of miR-142‐5p was detected by RT-qPCR.Results   Besides the ability to promote cell acitivity, OA ameliorated OGD/R-induced inflammatory response and apoptosis in PC12 cells. Moreover, the capability of OA to alleviate OGD/R-induced inflammation and apoptosis in PC12 cells was observed to be related to the down-regulation of miR-142‐5p.Conclusion   OA improved inflammatory response and apoptosis of PC12 cells induced by OGD/R through downregulating miR-142‐5P

Oleanolic Acid Improved Inflammatory Response and Apoptosis of PC12 Cells Induced by OGD/R Through Downregulating miR-142-5P