蛛网膜下腔出血大鼠脑干组织叉头框蛋白的表达及尼莫地平的影响

目的 研究丝氨酸/苏氨酸蛋白激酶Bprotein Kinase B,PKB(AKT)]、叉头框蛋白forkhead box(FOXO),FKHR]在大鼠蛛网膜下腔出血脑血管痉挛动物模型中早期(1d)的表达、活化情况及应用尼莫地平的影响.方法 将Wistar大鼠分为假手术组(对照组)、SAH模型组、SAH后给尼莫地平治疗组(治疗组).经颅多普勒超声(TCD)检测大鼠基底动脉的最大血流速度(Maximum velocity of Basilar artery blood flow,Vmba).脑干组织进行免疫组化染色.结果 SAH模型组与对照组相比基底动脉血流加快(P＜0.05).治疗组比SAH模型组基底动脉血流速度慢(P＜0.05).在对照组AKT、P-AKT(磷酸化-AKT)、FKHR、P-FKHR(磷酸化-FKHR)均可见阳性细胞表达.在SAH模型组:AKT表达增多,但与对照组比较差异无显著性(P＞0.05);P-AKT表达减少,与对照组比较差异有显著性(P＜0.05).在治疗组AKT、P-AKT表达较对照组和SAH模型组均增加,差异具有显著性(P＜0.05).在SAH模型组FKHR表达增加,P-FKHR表达减少,与对照组比较差异有显著性(P＜0.05);在治疗组FKHR表达较对照组和SAH模型组均减少,P-FKHR表达较对照组和SAH模型组均增加,差异具有显著性(P＜0.05).结论 PKB/AKT介导的磷酸化能够诱导FOXO蛋白从细胞核到细胞质的重新定位,诱导FOXO蛋白的活性发生改变,并参与了大鼠SAH后早期(1d)CVS的形成.尼莫地平具有缓解SAH后早期(1d)CVS的作用.

Study on the expression of FOXO in brain stem of rats with subarachnoid hemorrhage and effect of nimodipine on the expression

Objective To study on the early(1d)expression,activation conditions and application of nimodipine effects on serine/threonine protein kinase(AKT)and forkhead box protein(FKHR)in the rat cerebral vasospasm following subarachnoid hemorrhage in animal models.Methods The Wistar rats were divided into sham-operation group(Called the control group),SAH model group and SAH nimodipine treatment group(called the treatment group).Transcranial Doppler ultrasound(TCD)was used to detect the largest rat basilar artery bl...