红景天苷对大鼠局灶性脑缺血/再灌注损伤的保护作用

目的研究红景天苷对大鼠局灶性脑缺血/再灌注损伤的保护作用。方法制作大鼠大脑中动脉闭塞(middlecerebral artery occlusion,MCAO)模型,观察大鼠行为学改变;取大脑并用红四氮唑(tetrazolium chloride,TTC)染色后测定梗死百分比和含水量;进行大脑组织学的检查以及制作脑匀浆测定SOD、MDA、GSH、Na+,K+-ATP酶、Ca2+-ATP酶、LD和NO的含量。结果红景天苷高、中、低剂量组(24、12、6mg.kg-1)均能使动物的行为学评分、脑梗死百分比、脑含水量明显降低;改善脑组织学损伤;并能够明显增加SOD、GSH的含量并降低MDA、NO、LD的含量,其中24、12mg.kg-1组还能明显提高缺血/再灌注后脑匀浆内Na+,K+-ATP酶、Ca2+-ATP酶的活力。结论红景天苷对脑缺血/再灌注有一定的保护作用。

Protective effects of on focal cerebral ischemic-reperfusion injury in rats

Aim To investigate the protective effects of on focal cerebral ischemic-reperfusion(I/R)injury in rats.Methods The model of rat middle cerebral artery occlusion(MCAO)was induced to observe the change of praxiology of rats,infarction percentage,water content,histology of the rat brains.The levels of superoxide dismutase(SOD),malondialdehyde(MDA),reduced glutathione hormone(GSH),Na+,K+-ATPase,Ca2+-ATPase,nitric oxide(NO)were also measured.Results Salidroside at different dosages(24,12,6 mg·kg-1)could obviously decrease cerebral function score,cerebral infarct size and water content,and repair pathological injury of focal cerebral I/R in rats.MDA,LD,NO contents in brain tissue were significantly decreased and activities of GSH,SOD were significantly improved.Na+,K+-ATPase,Ca2+-ATPase at dosages of 24,12 mg·kg-1 were also significantly improved.Conclusion Salidroside had protective effects on injuries of cerebral I/R.