In order to investigate the potential mechanism, we study the effect of PLA2 on the blood brain barrier(BBB)of rats by means of PLA2 and Evans blue(EB) injected intravascularly.

• 用伊文氏蓝（Evan'sBlue，EB）示踪，肉眼和切片观察脑组织EB蓝染情况，作为BBB通透性增高的一般指示剂。