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The effects of cyclln-dependent kinase inhibitor on reactive gliosis of the ipsilateral cortex following MCA occlusion
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF EMERGENCY MEDICINE
- Issue:
- 4
- DOI:
- 10.3760/j.issn:1671-0282.2004.04.007
- Key Word:
- 星形胶质细胞;胶质增生;细胞周期;周期素依赖激酶;脑缺血
Abstract： 目的通过抑制细胞周期素依赖激酶(cyclin-dependent kinase,CDKs),对星形胶.质细胞增殖进行干预,以探讨其对胶质增生的影响.方法建立大鼠大脑中动脉阻塞(middle cerebral artery occlusion,MCAO)再灌流模型,随机分为脑缺血对照组和干预组(分别于再灌流后第3天、第5天腹腔注射CDKs抑制剂),应用免疫印迹和免疫组织化学方法检测各组MCAO后第4周损伤侧皮层胶质纤维酸性蛋白(glialfibrillary acidic protein,GFAP)的表达;并通过HE染色对皮层中风囊体积进行测定,观察CDKs抑制剂对胶质增生的影响.结果MCAO后第4周,皮层可形成明显的中风囊,并且在胶质瘢痕附近存在密集、活化的星形胶质细胞;损伤侧皮层CFAP蛋白的表达明显增强.经给予CDK抑制剂处理后,可明显缩小中风囊体积(P＜0.05),并部分抑制了GFAP蛋白的表达(P＜0.05)以及星形胶质细胞的过度增殖.结论通过对细胞周期蛋白的调控,可部分抑制胶质增生,从而有可能为神经再生和功能重建提供更有利的生存环境.
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