Abstract
Alzheimer’s disease is a severe neurodegenerative disease affecting elder worldwide and closely related to the neurotoxicity induced by amyloid β. To find efficient therapeutics, we have investigated the protective effects of cedrin from Cedrus deodara (Roxb.) G. Don on PC12 cells against the neurotoxicity induced by amyloid β1–42. The results have shown the viability of PC12 cells injured by amyloid β1–42 can be improved by cedrin. Cedrin can reduce reacrive oxygen species overproduction, increase the activity of superoxide dismutase and decrease malondialdehyde content. Meanwhile, the loss of mitochondrial membrane potential and mitochondrial permeability transition pore opening in PC12 cells, and elevated Caspase-3 activity, downregulated Bcl-2 and upregulated Bax are meliorated. These results demonstrate the protective effect of cedrin is related to the inhibition of oxidative stress, improvement of mitochondrial dysfunction and suppression of apoptosis. This investigation gives evidences for the application of cedrin in practice and further investigation in vivo.
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