磷酸肌酸钠预给药对大鼠局灶性脑缺血再灌注损伤的影响

目的:观察不同浓度磷酸肌酸钠预给药对大鼠脑缺血再灌注损伤(I/R)模型脑梗死体积的影响。方法:模型建立采用大脑中动脉线栓法。50只SD大鼠随机分为假手术组(Sham组),I/R组及低、中、高剂量磷酸肌酸钠预给药组(即L、M、H组),每组10只。再灌注末,测血清超氧化物歧化酶(SOD)、丙二醛(MDA)水平,脑组织中Na+-K+-ATP酶及髓过氧化物酶(MPO)活性。实验结束对脑组织进行HE、TTC染色,观察脑组织损伤情况。结果:再灌注24h末,各组间血清SOD、MDA及脑组织中MPO、Na+-K+-ATP酶活性比较差异有统计学意义(P<0.05);Bederson神经功能缺损评分显示Sham组无损伤,其余各组均出现不同程度的神经损伤。脑梗死体积百分比比较,Sham组脑组织无梗死,I/R组脑梗死体积百分比较L、M、H组明显增大,L组大于M组、H组;M组脑梗死体积大于H组,差异均有统计学意义(P<0.05)。结论:低、中、高浓度磷酸肌酸钠预给药均可有效地减少局灶性脑缺血再灌注损伤后大鼠脑梗死体积,减轻脑缺血再灌注后的损伤。

Effects of Exogenous Creatine Phosphate Sodium Pre-Conditioning on Rat Model of Focal Cerebral Ischemia/Reperfusion Injury

Objective:To observe the effect of creatine phosphate sodium pre-conditioning on cerebral infarction volume of focal cerebral ischemia/reperfusion rat model.Methods:The rat model of focal cerebral ischemia/reperfusion injury was established by middle cerebral artery occlusion(MCAO) method.Fifty SD rats were randomly divided into 5 groups,sham operation group(Sham),ischemia/reperfusion injury group(I/R),low dosage of creatine phosphate sodium group(L),moderate dosage of creatine phosphate sodium group(M),and...