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A Study of the Effect and the Molecule Mechanism of “Fu Yuan Xing Nao Tang” to the Infarct Volume of Rats with Diabetic Cerebral Infarction
Author(s): 
Pages: 78-82
Year: Issue:  5
Journal: Jiangsu Journal of Traditional Chinese Medicine

Keyword:  复元醒脑汤糖尿病脑梗死血运重建miR-320IGF-1病理学;
Abstract: 目的:观察复元醒脑汤对糖尿病脑梗死模型大鼠梗死体积的干预作用,从micro RNA-320(mi R-320)对IGF-1的负性调控途径揭示复元醒脑汤促进糖尿病脑梗死血运重建的分子机制与作用靶点。方法:健康雄性SD大鼠按随机数字表法分为正常组、假手术组、模型组、西药组、中药组。除正常组与假手术组以外,其余各组大鼠采用腹腔注射链脲佐菌素(STZ)50mg/kg后予以高糖高脂肪饲料喂养2周的方法复制糖尿病大鼠模型,采用线栓法制备糖尿病脑梗死动物模型。造模成功后中药组予复元醒脑汤灌胃,西药组予二甲双胍和尼莫地平灌胃,其余各组给予等量生理盐水灌胃,每日2次,连续14d。给药结束后处死取材,TTC染色法检测各组大鼠脑梗体积,HE染色法和透射电镜观察各组大鼠脑组织的病理形态学改变,q PCR法检测各组大鼠缺血脑组织中mi R-320、IGF-1基因表达水平,Western blot法检测IGF-1蛋白表达水平。结果:西药组与中药组大鼠脑梗死体积明显小于模型组(P<0.01),脑组织病理形态也较模型组明显改善。与模型组比较,西药组与中药组大鼠缺血脑组织mi R-320基因表达水平显著降低(P<0.01),IGF-1 m RNA和蛋白的表达水平显著升高(P<0.01)。结论:复元醒脑汤可缩小糖尿病脑梗死大鼠脑组织的梗死体积,改善缺血脑组织病理形态学,其可能的分子机制是通过抑制mi R-320表达,从而增加IGF-1的表达,增加缺血脑组织内的血管新生,促进血运重建。
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