The permeability of BBB and expression of TGF-β1 during reperfusion after middle cerebral artery occlusion

2003 
目的探讨大鼠脑缺血再灌注后血脑屏障(BBB)通透性的改变以及转移生长因子β1(TGF-β1)在脑组织中的表达.方法采用线栓法制备大鼠局灶性脑缺血再灌注模型,通过测定脑组织中伊文氏蓝(EB)含量及免疫组化法来观察TGF-β1的表达.结果缺血2h再灌注3h,BBB通透性开始增加,24h达高峰,72h后明显减弱.同时,TGF-β1在缺血再灌注3h开始表达,24h达高峰,持续至72h 72h后逐渐减弱.结论脑缺血后BBB的破坏与TGF-β1的表达密切相关,提示TGF-β1参与了BBB内皮细胞破坏的修复过程.
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