Effect of PGE1 on the expression of Apaf-1 and TLR4 in rats with cerebral ischemia-reperfusion injury / 中华行为医学与脑科学杂志

ABSTRACT

Objective To explore the effects of prostaglandin E1 (PGE1) on the expression of Apaf-1 and TLR4 in rats with cerebral ischemia-reperfusion(CIR) injury.Methods 32 healthy adult male Wistar rats were randomly divided into four groups,which were sham operated group (n=8),CIR model group (n=8) and PGE1 pretreated groups (low dose,12 μg · kg-1;high dose,24 μg · kg-1,n =8).Rat model of cerebral ischemia/reperfusion was established by bilateral common carotid artery ligation.The expression of Apaf-1 and TLR4 was detected with immunohistochemical staining method in hippocampus and epencephalon.Results After 20 min of ischemia and reperfusion for 24 h,compared with sham operated group (Apaf-1hippocampus (0.87±0.78),epencephalon (0.67 ±0.43);TLR4hippocampus (2.43 ± 1.17),epencephalon (1.97± 1.033)),the number of positive cells of Apaf-1 (hippocampus (11.83± 2.26);epencephalon(5.80±1.30) and TLR4 (hippocampus(16.90±2.86);epencephalon(12.90±2.66)) was increased in CIR model group (P＜0.05).Compared with CIR model group,the positive cell numbers of Apaf-1 (hippocampuslow dose(9.83±2.12),high dose(5.50± 1.17);epencephalonlow dose(4.87± 1.38),high dose(2.73±1.172)) and TLR4 (hippocampuslow dose (11.53± 2.40),high dose (9.13 ± 2.54);epencephalonlow dose (9.07 ± 2.07),high dose (4.47 ± 1.68)) were reduced dose-dependently in PGE 1 pretreatment all group (all P ＜0.05).Conclusion PGE1 can inhibit the expression of Apaf-1 and TLR4 in hippocampus and epencephalon of rat with cerebral ischemia-reperfusion injury.