人参皂甙Rgl对帕金森病小鼠神经保护作用初探

目的 研究人参皂甙Rg1在对帕金森病(PD)黑质多巴胺能神经元凋亡的可能机制及其神经保护作用. 方法 采用神经毒素1-甲基4-苯基-1,2,3,6-四氢吡啶(MPTP)制备PD小鼠模型,免疫组织化学法与蛋白印迹法观察各组小鼠黑质酪氨酸羟化酶(TH)和促凋亡基因Caspase-3表达变化;原位末端标记法(TUNEL)观察黑质细胞凋亡数量变化. 结果 人参皂甙Rg1干预组黑质TH阳性神经元细胞丢失明显减轻(31% vs.55%)(P

The protective effect of Ginsenoside Rg1 on nerves in the mice model of Parkinson's disease

Objective To investigate possible mechanism of Ginsenoside Rg1 on dopaminergic nigral neurons apoptosis of Parkinson's disease (PD) and its protective effect.Methods C57BL/6N mice were administrated with 1-Methy-4-phenyl-1,2,3,6-tetrahydropyri-dine (MPTP) to produce chronic PD model,PD mice were observed in behavioral changes.The expression levels of caspase-3 and TH in ventral midbrain were studied with immunohistochemistry and Western blotting.Apoptotic cell numbers were determined by TdT-mediated dUTP-biotin nick end labeling (TUNEL).Results In group treated with Ginsenoside Rg1,the number of TH-positive neurons in SN was only decreased by 31% as compared with the control group (55%)(P<0.01),the expression of caspase-3 was apparently decreased and major expressed in the cytosol of nigral neurons and TUNEL positive cells in SN decreased (P<0.01).Conclusion The neuroprotective effect of Ginsenoside Rg1 on dopaminergic nigral neurons apoptosis of the mice model of Parkinson's disease induced by MPTP is significant,Decreased expression of Caspase-3 may be the major mechanism of Ginsenoside Rg1 for antiapoptosis.