polysaccharide alleviates oxygen glucose deprivation-induced PC-12 cells damage by up-regulating miR-24.

This research was aimed to detect the functions of polysaccharides (LBPs) on oxygen and glucose deprivation (OGD) injury and potential mechanisms at PC-12 cells. CCK-8, flow cytometry and reactive oxygen species (ROS) assays were used to detect OGD, LBPs and miR-24 effects on cell viability, apoptosis, and oxidative stress. MiR-24 was transfected and texted by transfection and qRT-PCR. Moreover, the related-protein levels of apoptosis, autophagy and pathways were tested by Western blotting. LBPs significantly enhanced cell viability , inhibited cell apoptosis, autophagy and ROS level in OGD injury. In addition, miR-24 expression was declined in OGD-treated cells, while it was elevated when added LBPs. The preventive effects of LBPs on PC-12 cell damage induced by OGD were reversed by down-regulating miR-24. Furthermore, miR-24 inhibitor declined LBPs-induced change in Wnt/β-catenin and JAK1/STAT3 pathways in OGD-injuried cells. LBPs exhibited preventive effects via up-regulating miR-122 and activating Wnt/β-catenin and JAK1/STAT3 pathways in OGD-induced PC-12 cells.