Galantamine alleviates senescence of U87 cells induced by beta-amyloid through decreasing ROS production.

Galantamine, which is currently used in the treatment of Alzheimer's disease (AD), has been shown to exert a neuroprotective effect against beta-amyloid (Aβ) peptide-induced toxicity, a critical component involved in the pathogenesis of AD. The aim of this study was to examine the effects of galantamine on proliferation, senescence and ROS production in a U87 cell line treated with Aβ. With the use of a Cell Counting Kit-8 and β galactosidase staining assay, we observed that galantamine (0.3μM) pretreatment significantly prevented Aβ1-40-induced cell degradation and senescence. Aβ1-40-induced ROS production and p53 expression were increased as determined by DCF-derived fluorescence using flow cytometry and Western blotting and reduced in response to galantamine pretreatment. Overall, we found that all alterations resulting from Aβ1-40 were reversed by galantamine pretreatment. In addition, we demonstrate that this neuroprotection from galantamine can be blocked by an α7 nAChR antagonist. Taken together, the findings of this study provide a better understanding of the mechanisms underlying the protective effects of galantamine, effects which include antioxidative properties.