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Oxidative Medicine and Cellular Longevity
Volume 2012 (2012), Article ID 721721, 7 pages
http://dx.doi.org/10.1155/2012/721721
Research Article

Schizandrin, an Antioxidant Lignan from Schisandra chinensis, Ameliorates Aβ1–42-Induced Memory Impairment in Mice

1Department of Pharmacognosy, Shenyang Pharmaceutical University, Shenyang 110016, China
2National Population and Family Planning Key Laboratory of Contraceptives Drugs & Devices, Shanghai Institute of Planned Parenthood Research, Shanghai 200032, China
3Pharmacy College, Jinan University, Guangzhou 510632, China

Received 7 March 2012; Revised 14 May 2012; Accepted 14 May 2012

Academic Editor: David Vauzour

Copyright © 2012 Di Hu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In the present study, we examined the effect of schisandrin (SCH) of Schisandra chinensis on the amyloid-beta1–42- (Aβ1–42-) induced memory impairment in mice and elucidated the possible antioxidative mechanism. Mice were intracerebroventricular (i.c.v.) injected with the aggregated Aβ1–42 and then treated with SCH (4, 12, and 36 mg/kg body weight) or donepezil (DPZ), a reference drug (0.65 mg/kg) by intragastric infusion for 14 days. Noncognitive disturbances and cognitive performance were evaluated by locomotor activity test, Y-maze test, and water maze test. Antioxidative enzyme activities including superoxide dismutase (SOD) and glutathione peroxidase (GSH-px) and levels of malondialdehyde (MDA), glutathione (GSH), and oxidized glutathione (GSSG) within the cerebral cortex and hippocampus of mice were measured to elucidate the mechanism. Our results showed that SCH significantly improved Aβ1–42-induced short-term and spatial reference memory impairments in Y-maze test and water maze test. Furthermore, in the cerebral cortex and hippocampus of mice, SOD and GSH-px activities, GSH level, and GSH/GSSG ratio were increased, and levels of MDA and GSSG were decreased by the treatment of SCH. These results suggest that SCH is a potential cognitive enhancer against Alzheimer’s disease through antioxidative action.