红景天苷对大脑中动脉闭塞模型大鼠的神经保护作用

摘要

目的：探讨红景天苷( salidroside, Sal)对MCAO模型大鼠的神经保护作用。方法健康成年,♂,SD大鼠45只,随机分成3组：假手术组( sham)、模型对照组( MCAO),红景天苷给药组( MCAO+Sal),采用线栓法制作大鼠大脑中动脉闭塞模型(middle cerebral artery occlusion, MCAO),连续给药6 d,同时评价神经功能损伤,检测脑梗死体积,基因芯片分析,检测caspase-3、cleaved caspase-3蛋白和IL-6、Vgf、Hba-a2、Hbb-b1、Hbb、CD44、Pnpla2、Slc6a5、Slc5a7的基因表达。结果与MCAO组比较,红景天苷能明显改善大鼠的神经功能损伤,降低脑梗死体积；抑制 cleaved caspase-3蛋白和IL-6基因的表达；并能够促进Vgf、Hba-a2、Hbb-b1、Hbb基因的表达,能够降低CD44、Pnpla2、Slc6a5、Slc5a7基因的表达。结论红景天苷能够降低MCAO模型大鼠神经功能评分,减少脑梗死体积,具有神经保护作用,其作用机制可能与促进Vgf、Hba-a2、Hbb-b1、Hbb的表达和下调 cleaved caspase-3、IL-6、CD44、Pnpla2、Slc6a5、Slc5a7的表达有关。%Aim To investigate the neuroprotective effect of salidroside in MCAO rats. Methods The rats were subjected to middle cerebral artery occlusion with suture-occluded method, and the neurologic injury and infarct size of rats were evaluated. According to the gene chip detected, the protein expressions of caspase-3 , cleaved caspase-3 were determined and the mRNA expressions of IL-6, Vgf, Hba-a2, Hbb-b1, Hbb, CD44, Pnpla2, Slc6a5 and Slc5a7 were tested. Re-sults Compared with MCAO group, salidroside signif-icantly improved the neurological deficit, reduced the infarct sizes, inhibited the expressions of cleaved caspase-3 protein and IL-6 mRNA, promoted the ex-pressions of Vgf, Hba-a2, Hbb-b1, Hbb, and reduced the expressions of CD44 , Pnpla2 , Slc6 a5 and Slc5 a7 . Conclusions Salidroside can reduce the neurological deficit and infarct size, and protect rats against focal cerebral ischemia-reperfusion injury, which may be ac-complished by increasing the expressions of Vgf, Hba-a2, Hbb-b1, and Hbb, and decreasing the expressions of cleaved caspase-3 , IL-6 , CD44 , Pnpla2 , Slc6 a5 and Slc5 a7 .