局灶性脑缺血大鼠脑中血小板内皮细胞黏附分子-1、Bel-2和Bax表达的动态改变

目的观察大鼠局灶性脑缺血后脑组织中血小板内皮细胞黏附分子-1（PECAM-1、CD31）、Bcl-2、Bax表达的动态改变。方法采用线栓法制作大鼠大脑中动脉局灶性脑缺血模型，脑组织切片免疫组化染色检测不同时间点PECAM．1、Bcl-2、Bax在脑组织中的表达变化。结果大鼠大脑中动脉闭塞后脑组织PECAM-1、Bcl-2、Bax的表达明显增高（均P〈0．001）。Bcl-2在闭塞后12h达到高峰，Bax在24h达高峰，PECAM-148h达高峰；至72h，三者仍明显高于对照组（P〈0．001）。结论脑组织表达的PECAM-1、Bcl-2、Bax分别参与了脑缺血不同时期的病理生理作用。

The changes of PECAM-1,Bcl-2 and Bax after focal cerebral ischemia in rats

Objective To observe the changes of PECAM-1,Bcl-2 and Bax expressed by ischemic cerebrum of adult rats after focal cerebral ischemia. Methods Middle cerebral artery occlusion (MCAO) models were made by operation with Longa suture method in Wistar rats. The expression levels of PECAM-1,Bcl-2 and Bax at the 6th,12th,18th,24th,48th,72nd hour after MCAO were detected by immunohistochemistry staining. Results The expression levels of PECAM-1,Bcl-2 and Bax in cerebrum were significantly increased after MCAO. The expression levels of Bcl-2 we、re up to the peak at the 12th hour after MCAO, while the levels of Bax and PECAM-1 were up to the peak at the 24th and 48th hour after MCAO. At the 72nd hour after MCAO, the expression levels of PECAM.1.Bcl-2 and Bax were still higher than that in the control group(all P＜0.001).Conclusions PECAM-1,Bcl-2 and Bax participate in the different pathological stages of focal cerebral ischemia.