睫状神经营养因子对体外培养星形胶质细胞的激活作用

目的观察睫状神经营养因子（ciliary neurotrophic factor,CNTF）对体外培养星形胶质细胞的细胞激活作用。方法分别给予不同浓度（0、2、20、200ng／ml）的CNTF孵育有血清培养和无血清培养的星形胶质细胞,采用免疫细胞化学技术及流式细胞术,观察星形胶质细胞形态及细胞周期的变化。结果有血清培养和无血清培养时CNTF均使星形胶质细胞GFAP表达增强,胞核增大。有血清培养时CNTF还可以促进星形胶质细胞进入细胞周期进行增殖：无血清培养时CNTF无此效应。结论无血清培养时CNTF可以刺激星形胶质细胞进入活化状态,但不刺激其增殖：有血清培养时CNTF可以协助血清中的丝裂原引起星形胶质细胞增殖。

Effect of ciliary neurotrophic factor on activation of astrocytes in vitro

Objective To observe the activating effect of ciliary neurotrophic factor (CNTF) on astrocyte in vitro. Methods Astrocytes cultured purely from newborn rats. Cerebral cortex was raised in normal and serum deprivation condition with different concentrations (in ng/ml: 0, 2, 20, or 200) of CNTF. After cultured for 24 h, the shape and the cell cycle of astrocytes were examined by immunocytochemistry and flow cytometer, respectively. Results The immunoactivity of glial fibrillary acidic protein (GFAP) and the nuclear size of astrocytes were increased when CNTF was applied, whether cells were cultured in medium with or without serum. CNTF promoted astrocytes to enter the cell cycle in medium with serum, but had no this effect in medium without serum. Conclusion In medium without serum, astrocytes could differentiate into activated state cells with CNTF application, but could not proliferate; in medium with serum, astrocytes could proliferate with aid of CNTF.