Abstract: The present study was designed to probe the effects of Huperzine A (HupA) on diabetes-associated cognitive decline (DACD) using a streptozotocin (STZ)-injected rat model. Diabetic rats were treated with HupA (0.05 and 0.1 mg/kg) for seven weeks. Memory functions were evaluated by the water maze test. Nissl staining was selected for detecting neuronal loss. Protein and mRNA levels of brain-derived neurotrophic factor (BDNF) were analyzed by ELISA and real-time PCR, respectively. The activities of choline acetylase (ChAT), Acetylcholinesterase (AChE), malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT), NF-κB p65 unit, TNF-α, IL-1β, IL-6 and caspase-3 were measured using corresponding kits. After seven weeks, diabetic rats exhibited remarkable reductions in: body weight, percentage of time spent in target quadrant, number of times crossing the platform, ChAT and BDNF levels, SOD, GSH-Px and CAT accompanied with increases in neuronal damage, plasma glucose levels, escape latency, mean path length, AChE, MDA level as well as CAT, NF-κB p65 unit, TNF-α, IL-1β, IL-6 and caspase-3 in cerebral cortex and hippocampus. Supplementation with HupA significantly and dose-dependently reversed the corresponding values in diabetes. It is concluded that HupA ameliorates DACD via modulating BDNF, oxidative stress, inflammation and apoptosis.
Keywords: huperzine A; diabetes-associated cognitive decline; brain-derived neurotrophic factor; oxidative stress; inflammation; apoptosis
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Mao, X.-Y.; Cao, D.-F.; Li, X.; Yin, J.-Y.; Wang, Z.-B.; Zhang, Y.; Mao, C.-X.; Zhou, H.-H.; Liu, Z.-Q. Huperzine A Ameliorates Cognitive Deficits in Streptozotocin-Induced Diabetic Rats. Int. J. Mol. Sci. 2014, 15, 7667-7683.
Mao X-Y, Cao D-F, Li X, Yin J-Y, Wang Z-B, Zhang Y, Mao C-X, Zhou H-H, Liu Z-Q. Huperzine A Ameliorates Cognitive Deficits in Streptozotocin-Induced Diabetic Rats. International Journal of Molecular Sciences. 2014; 15(5):7667-7683.
Mao, Xiao-Yuan; Cao, Dan-Feng; Li, Xi; Yin, Ji-Ye; Wang, Zhi-Bin; Zhang, Ying; Mao, Chen-Xue; Zhou, Hong-Hao; Liu, Zhao-Qian. 2014. "Huperzine A Ameliorates Cognitive Deficits in Streptozotocin-Induced Diabetic Rats." Int. J. Mol. Sci. 15, no. 5: 7667-7683.