Neuroprotective Mechanism of Ribisin A on H2O2-induced PC12 cell injury model

Abstract

ABSTRACTRibisin A has been shown to have neurotrophic activity. The aim of this study was to evaluate the neuroprotective effect of Ribisin A on injured PC12 cells and elucidate its mechanism. In this project, PC12 cells were induced by H2O2to establish an injury model. After treatment with Ribisin A, the neuroprotective mechanism of Ribisin A was investigated by methyl tetrazolium (MTT) assay, Enzyme-linked immunosorbent assay (ELISA), flow cytometric analysis, fluorescent probe analysis, and western blot. We found that Ribisin A decreased the rate of lactate dehydrogenase (LDH) release, increased cellular superoxide dismutase (SOD) activity, decreased the levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), Ca2+expression and reactive oxygen species (ROS). Moreover, Ribisin A significantly increased mitochondrial membrane potential (MMP) and inhibited apoptosis of PC12 cells. Meanwhile, Ribisin A activated the phosphorylation of ERK1/2 and its downstream molecule CREB by upregulating the expression of Trk A and Trk B, the upstream molecules of the ERK signaling pathway.Graphical Abstract