20(S)-protopanaxadiol (PPD) alleviates scopolamine-induced memory impairment via regulation of cholinergic and antioxidant systems, and expression of Egr-1, c-Fos and c-Jun in mice

文献类型： 外文期刊

第一作者： Lu, Cong

作者： Lu, Cong;Wang, Yan;Fan, Bei;Wang, Fengzhong;Lu, Cong;Dong, Liming;Lv, Jingwei;Liu, Xinmin;Liu, Xinmin

作者机构：

关键词： 20(S)-Protopanaxadiol (PPD);Scopolamine;Mice;Cholinergic function;Antioxidant system;Immediate early genes protein

期刊名称：CHEMICO-BIOLOGICAL INTERACTIONS （ 影响因子：5.192； 五年影响因子：4.61 ）

ISSN： 0009-2797

年卷期： 2018 年 279 卷

页码：

收录情况： SCI

摘要： 20(S)-protopanaxadiol (PPD) possesses various biological properties, including anti-inflammatory, antitumor and anti-fatigue properties. Recent studies found that PPD functioned as a neurotrophic agent to ameliorate the sensory deficit caused by glutamate-induced excitotoxicity through its antioxidant effects and exhibited strong antidepressant-like effects in vivo. The objective of the present study was first to investigate the effect of PPD in scopolamine (SCOP)-induced memory deficit in mice and the potential mechanisms involved. In this study, mice were pretreated with PPD (20 and 40 mu mol/kg) and donepezil (1.6 mg/kg) intraperitoneally (i.p) for 14 days. Then, open field test was used to assess the effect of PPD on the locomotor activity and mice were daily injected with SCOP (0.75 mg/kg) to induce cognitive deficits and then subjected to behavioral tests by object location recognition (OLR) experiment and Morris water maze (MWM) task. The cholinergic system function, oxidative stress biomarkers and protein expression of Egr-1, c-Fos, and c-Jun in mouse hippocampus were examined. PPD was found to significantly improve the performance of amnesia mice in OLR and MWM tests. PPD regulated cholinergic function by inhibiting SCOP-induced elevation of acetylcholinesterase (AChE) activity, decline of choline acetyltransferase (ChAT) activity and decrease of acetylcholine (Ach) level. PPD suppressed oxidative stress by increasing activities of antioxidant enzymes such as superoxide dismutase (SOD) and lowering maleic diadehyde (MDA) level. Additionally, PPD significantly elevated the expression of Egr-1, c-Fos, and c-Jun in hippocampus at protein level. Taken together, all these results suggested that 20(S)-protopanaxadiol (PPD) may be a candidate compound for the prevention against memory loss in some neurodegenerative diseases such as Alzheimer's disease (AD).

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