米非司酮对2型糖尿病大鼠海马组织中GRmRNA表达的影响

来源 :世界中医药学会联合会中药药理专业委员会第七届学术会议、全国中药药理联合会第二届学术年会暨第20届中日健康学术研讨会 | 被引量 : 0次 | 上传用户:lm20090910
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目的:观察米非司酮(mifepristone,MIF)不同剂量对高脂饲料喂养联合小剂量链脲佐菌素(streptozotocin,STZ)诱导的2型糖尿病大鼠血浆中激素水平(CRH、ACTH、CORT、INS、ALD)和海马组织中GRmRNA表达的影响,探讨米非司酮基于HPA轴功能调节治疗2型糖尿病的作用机制. 方法:采用高脂饲料加小剂量链脲佐菌素(STZ,30mg·kg-1)腹腔注射诱导2型糖尿病模型.随机分为正常对照(NOR)组、模型(MOD)组、阳性对照(盐酸二甲双胍,MET)组(200mg·kg-1·d-1)、米非司酮低剂量(MIF-L,10mg·kg-1·d-1)、中剂量(25mg·kg-1·d-1,MIF-M)、高剂量(50mg·kg-1·d-1,MIF-H)组,正常组和模型组给予蒸馏水.每周测定大鼠空腹血糖,给药5周后断头处死,计算脏器指数,测定血浆中CRH、ACTH、皮质酮、胰岛素、醛固酮的水平,采用RT-PCR测定大鼠海马组织中GRmRNA的表达. 结果:与正常对照组比,2型糖尿病模型组大鼠体重明显降低(P<0.01);脏器指数增加(P<0.05),CR1、ACTH、CORT、INS、ALD增加;MIF-H可缓解大鼠体重降低,MIF-M,MIF-H可使血浆CRH、ACTH、皮质酮、ALD水平降低;米非司酮可增加糖尿病大鼠海马组织中GRmRNA的表达. 结论:米非司酮可缓解糖尿病大鼠高血糖,逆转2型糖尿病大鼠海马组织中GRmRNA表达的降低.
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目的:观察米非司酮(mifepristone,MIF)对慢性应激大鼠脂代谢和肝脏中GRmRNA、PPAR-γmRNA表达的影响.方法:采用高脂饲料联合四种不同的应激方式(悬尾30 min;PVC筒固定2h;纱布束缚2h;大鼠固定架制动2h)建立慢性应激大鼠模型.随机分为正常对照(control)组、应激模型(model)组、米非司酮-低剂量(MIF-L)(10 mg·kg-1·d-1)、中剂量(M