中文摘要：

目的研究胶质细胞系源性神经营养因子（GDNF）对帕金森病（PD）大鼠黑质钙结合蛋白（CB）表达的影响，以及神经细胞黏附分子（NCAM）在其中的作用。方法制作PD模型大鼠36只，分为GD．NF组、NCAM阻断组和对照组，每组12只。采用免疫组化染色和免疫印迹法，检测各组大鼠黑质CB阳性细胞数和CB表达量。结果GDNF组黑质处CB阳性神经元数（46．50±6．28）及表达量（33770．60±6929．76）明显高于对照组[（27．00±8．60）、（18281．00±5266．78）]（均P〈0．05）；与NCAM阻断组[（44．00±13．37）、（30857．00±7484．87）]相比差异无统计学意义（均P〉0．05）。结论GDNF可上调PD大鼠黑质CB的表达，从而保护受损的多巴胺能神经元，NCAM对这一作用无明显影响。

英文摘要：

Objective To explore the effect of glial cell line-derived neurotrophic factor （GDNF） on the expressing of calbindin D28K （ CB ） in substantia nigra （ SN ） of rat model of Parkinson＇s disease （ PD ） and the possible role of neural cell adhesion molecule （NCAM） in this course. Methods 36 rat models of PD were made, and divided into GDNF group, NCAM blocked group and control group （each group had 12 rats）. Immunohistochemistry and Western blot method were used to detect the number of CB-positive cells and the expressed level of CB protein in SN of rats. Results The number of CB-positive cells （46.50 ± 6.28） and the expressed level of CB protein （33770.60 ± 6929.76） in SN of GDNF group were significantly higher than control group [ （27.00 ± 8.60）, （ 18281.00 ± 5266.78） respectively ] （ all P 〈 0. 05 ）. As compared with NCAM blocked group [ （ 44.00 ± 13.37）, （30857.00 ± 7484.87） respectively], there were no differences between the two groups （ all P 〉 0. 05 ）. Conclusions GDNF may protect the injured dopaminergic neurons through up regulating the expressing of CB, but NCAM is not involved in this mechanism.