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目的 评价血塞通联合右美托咪定对脑缺血再灌注损伤大鼠的脑保护效果。方法 选择老龄雄性Wistar大鼠50只,随机分为假手术(C)组、脑缺血再灌注(R)组、血塞通(P)组、右美托咪定(D)组,血塞通联合右美托咪定(PD)组,每组各10只。根据组别给予不同药物,行神经行为学测试;于第3、7天,测量脑梗死面积、脑水含量,以及超氧化物歧化酶(Superoxide dismutase,SOD)、谷胱甘肽过氧化酶(Glutathione peroxidase,GSH-PX)活性测定。结果 给药后第3、5、7天,与P、D组相比,PD组神经行为学评分改善更加显著(P<0.001);给药后第3、7天,与P组相比,PD组脑梗死面积、脑水含量均降低(P=0.01,P=0.002),SOD、GSH-PX活性升高显著(P=0.03,P=0.001);与D组相比,PD组脑梗死面积、脑水含量也显著降低(P<0.01,P=0.008);SOD、GSH-PX活性升高显著(P=0.009,P<0.001)。结论 血塞通联合右美托咪定较单独应用药物,能显著减轻缺血再灌注损伤造成的脑损害,具有脑保护作用。
Objective To explore the effects of Xuesaitong combined with dexmedetomidine on cerebral ischemia-reperfusion in elderly rats.Methods Fifty elderly male Wistar rats were randomly divided into 5 groups:sham operation(C)group,cerebral ischemia-reperfusion(R)group,Xuesaitong(P)group,dexmedetomidine(D)group,Xuesaitong combined with dexmedetomidine(PD)group.Xuesaitong was given in group P,dexmedetomidine was given in group D,and normal saline was given in group C and group R,continuously for 7 days.After 3- and 7-day treatment,the brain of rats was dissected out to assay the area of cerebral infarction,degree of cerebral edema,superoxide dismutase(SOD) and glutathione peroxidase(GSH-PX) activity.Results When compared PD group with P and D group,neurobehavioral score was lower at 3,5,7 day(P<0.001);area of cerebral infarction,degree of cerebral edema were less(P=0.01,P=0.002),activity of SOD and GSH-PX were higher at 3,7 days(P=0.03,P=0.001)respectively.When compared PD group with D group,area of cerebral infarction,degree of cerebral edema were less(P<0.01,P=0.008),activity of SOD and GSH-PX were higher at 3,7 days(P=0.009,P<0.001)respectively.Conclusions The combination of Xuesaitong and dexmedetomidine can obviously reduce the damage by cerebral ischemia-reperfusion in elderly rats and has brain protective effects.