【摘要】 目的:研究早期帕金森病(PD)大鼠脑内凋亡因子的改变及蝎源活性肽的保护作用。方法:选取健康雄性SD大鼠,体重为180~220 g,随机分为4组(n=10):早期PD模型组、假手术对照组、单独蝎源活性肽处理组和蝎源活性肽治疗组。采用6羟多巴胺(6-OHDA)制备大鼠PD早期模型,免疫组化观察大鼠黑质致密部和纹状体尾状核处Bax和Bcl-2免疫反应阳性颗粒数量和光密度的变化,观察大鼠PD发病早期脑内促进凋亡的Bax和抑制凋亡的Bcl-2的表达情况,进一步观察蝎源活性肽保护作用的抗凋亡机制。结果:发现在6-OHDA给药侧,PD早期大鼠与对照组相比,脑内促进凋亡的Bax表达增强,而抑制凋亡的Bcl-2表达减弱,而蝎源活性肽可有效的逆转这种异常的表达。结论:早期PD大鼠促进凋亡的Bax表达增强和抑制凋亡的Bcl-2表达减弱参与PD的早期病变,而抗凋亡机制参与了蝎源活性肽对中脑多巴胺能神经元的早期保护作用。更多还原

【Abstract】 Objective: To explore the alterations of apoptosis factor Bcl-2 /Bax in the early Parkinson’s disease( PD) rats and the protective effect of scorpion venom derived bioactive peptide. Methods: Healthy male SD rats( 180 ~ 220 g) were randomly divided into 4 groups( n = 10) : early PD model group,sham operation group,scorpion venom derived bioactive peptide control group,scorpion venom derived bioactive peptide therapy group. 6-hydroxydopamine( 6-OHDA) was used to prepare the early PD rat model.The immunohistochemistry was used to detect the expression of Bax and Bcl-2 and further explore the mechanism of anti-apoptosis regarding the neuroprotective effect of scorpion venom derived bioactive peptide. Results: The results indicated that compared with the control rats,the immunostaining of Bax in the brain increased significantly while that of Bcl-2 decreased significantly in the lesion side of 6-OHDA treated rats. Interestingly,scorpion venom derived bioactive peptide could attenuate the above abnormal changes. Conclusion: Up-regulation of Bax and down-regulation of Bcl-2 could participate in the early stage of PD and the anti-apoptotic mechanism could be involved in the neuroprotective effect exerted by scorpion venom derived activity peptide regarding the dopaminergic neuron in the early stage.更多还原