目的:探讨西洋参治疗胰岛素抵抗大鼠活性部位对骨骼肌转运蛋白-4mRNA(GLUT-4 mRNA)表达的影响。方法:本实验将西洋参的根部用95%EtOH回流得提取物。再将此提取物进行AB-8型大孔树脂柱色谱,按不同浓度洗脱,得到西洋参95%醇提组、西洋参60%醇提组、西洋参30%醇提组和水提组四个部分。通过早期药效学试验证明,西洋参60%醇提组和西洋参30%醇提组为有效部位。之后再以SD大鼠喂以高热饮食加链脲佐菌素(STZ)建立胰岛素抵抗大鼠模型,随机分为模型组、罗格列酮组、西洋参60%醇提组、西洋参30%醇提组。给药4周后,以RT-PCR法检测胰岛素抵抗大鼠骨骼肌GLUT-4 mRNA的表达。结果:与模型组比较,各给药组大鼠骨骼肌中GLUT-4 mRNA的表达相对增强,其中西洋参60%醇提组、30%醇提组与模型组比较有极显著性差异(P<0.01),罗格列酮组与模型组比较差异显著(P<0.05)。结论:西洋参可能通过使胰岛素抵抗大鼠骨骼肌GLUT-4 mRNA的表达增强,从而发挥快速转运葡萄糖的作用而对胰岛素受体InsR后抵抗有改善作用。
Objective:This study focuses on the effect of active fraction of American Ginseng treating insulin resistance rat to GLUT-4 mRNA expression.Methods:The roots of American Ginseng is extract with 95% EtOH to get extractive.Then extractive is eluted according to different concentrations by AB-8 type macroporous resin column chromatography to get Ginseng 95% alcoholic extraction group,Ginseng 60% alcoholic extraction group,Ginseng 30% alcoholic extraction group and aqueous extract group.It is proved that Ginsen...