中文摘要：

目的研究NG2胶质细胞在成年大鼠脑内的分布及形态差异。方法应用免疫组化SABC法，观察成年大鼠大脑皮质、海马、齿状回、丘脑、下丘脑等区域NG2免疫反应阳性细胞。采用Image．ProPlus5．0图像分析软件计数单位面积阳性细胞数量，并进行统计学分析。结果NG2胶质细胞在成年大鼠多个脑区均有表达，其中大脑皮质的灰质、白质，海马、齿状回，丘脑室下区、下丘脑室周区等区域表达比较集中。成年脑内NG2胶质细胞突起丰富、有较多分支，细胞体呈星形但是在各脑区形态不完全一致。结论NG2细胞是成年脑内另一类特殊胶质细胞，数量较多且一部分脑区集中表达。

英文摘要：

Objective To observe the localization of NG2 positive cells and morphological character in the brain of adult rats. Methods Immunohistochemical method was applied to determine the expression of NG2 positive cells in the cerebrum cortex, hippocampus, dentate gyrus, thalamencephalon and hypothalamus of adult rats. hnage analysis program Image Pro Plus 5.0 was used to count the positive cells and for statistic analysis. Results NG2 positive cells were strongly expressed in multiple brain regions of adult rats, of which strongest signals were centralized in gray and white matter of cerebral cortex, hippocampus, dentate gyrus, thalamic subventricular zone and hypothalamic periventricular region. The NG2 positive cells were seen with abundant process arborization which bifurcated two or more times. The soma of NG2 positive cell displays a star-like morphology with different shapes in the gray and white matter of cerebrum cortex. Conclusion NG2 positive cells are numerous in adult rat brain and display the special glial with a stellate morphology.