二苯乙烯苷对D-半乳糖致脑老化小鼠学习记忆及神经营养因子的影响

Effects of Stilbene-glycoside on Learning and Memory Ability and Neurotrophic Factor of Brain Aging Model Mice Induced by D-galactose

目的 :观察何首乌提取物二苯乙烯苷 (TSG)对D -半乳糖致痴呆模型小鼠学习记忆及脑内神经营养因子表达的影响。方法 :将小鼠随机分为正常对照组、D -半乳糖模型组、VitE阳性对照组及TSG低、中、高剂量 (0 033、0 1、0 3g/kg)6个组 ,除正常对照组外 ,其余各组小鼠在建立脑老化模型的同时灌胃给予相应药物60d ,随后进行Morris水迷宫测试 ,并采用免疫组化的方法检测TSG对神经生长因子 (NGF)和神经营养因子 -3(NT -3)的影响。结果 :与正常对照组比较 ,模型组小鼠在Morris水迷宫测试中游出时间和游出距离延长 ,海马CA1区NGF和NT -3的表达明显减少 ;TSG则能缩短小鼠游出时间和游出距离 ,增加海马CA1区NGF和NT -3的表达。结论 :TSG能明显提高学习记忆能力 ,对阿尔茨海默病可能具有防治作用。

OBJECTIVE:To observe the effect of2,3,5,4'-tetrahydroxy stilbene—2—β—D—glycoside(TSG)on learning and memory ability and neurotrophic factors of dementle model mice induced by D-galactose.METHODS:The mice were randomly divided into normal control,D-galatose model,VitE positive control,TSG low dose(0.033g/kg),TSG medium dose(0.1g/kg),TSG high dose(0.3g/kg)groups.The mice of various therapy groups excluding the normal Control group were inˉjected with D-galactose(D-gal)solution s.c.(50mg/kg/day)over a60-day period,while normal control was injected with saline.At the same time,therapy groups were given TSG and positive control VitE(0.08g/kg)a day,and all therapy groups were administered by intragastrically for60days.Then all mice of different groups were tested with Morris water maze test,and five mice of each group were killed and the expression of nerve growth factor(NGF)and neurotrophin-3(NT-3)was determined with immunohistochemistry method.RESULTS:Injection of D-galactose for2months induced the learning and memory dysfunction of mice,and abated NGF and NT-3expression in hippocampal neurons.TSG improved the learning and memory ability of D-gal model mice,promoted NGF and NT-3expression in hippocampal neurons.CONCLUSION:SG can improve memory ability obviously and may prevent and cure dementia disease such as AD.