高血压模型大鼠脂肪组织脂联素mRNA表达及福辛普利和氯沙坦干预的意义

目的 研究脂联素mRNA在自发性高血压模型大鼠脂肪组织中的表达及福辛普利和氯沙坦其表达的影响.方法 选用22周雄性高血压模型大鼠20只,随机分为高血压模型大鼠组、福辛普利干预组、氯沙坦干预组、福辛普利+氯沙坦干预组,同时选同周龄的WKY大鼠做对照组,每组动物5只,喂养8周后测大鼠尾动脉血压;留尿检测微量尿蛋白(Upm)和N-乙酰-β-D-氨基葡萄糖苷酶(NAG酶);取空腹血清检测肌酐(Scr)、尿素氮(Bun)水平;取肾周脂肪组织,RT-PCR检测脂联素mRNA表达.结果 高血压模型大鼠组血压、微量尿蛋白、NAG酶明显高于WKY组(P＜0.05),而脂联素mRNA表达明显低于WKY组(P＜0.05);药物干预组血压、微量尿蛋白、NAG酶明显低于高血压模型大鼠组(P＜0.05),而脂联素mRNA表达高于高血压模型大鼠组(P＜0.05).结论 高血压模型大鼠脂肪组织脂联素mRNA表达下降;经福辛普利和氯沙坦干预后血压下降,微量尿蛋白和NAG酶下降,肾功能改善,同时脂肪组织脂联素mRNA表达增加.提示脂联素在高血压的发生发展过程中起着重要作用.

Expression of adiponectin mRNA in adipose tissues of spontaneously hypertensive rat and effects of fosinopril and valsartan

Objective To investigate the expression of adiponectin Mrna in adipose tissues of spontaneously hypertensive rats (SHR) and the effects of Fosinopril (Fos) and osartan (Los) on adiponectin Mrna.Methods Twenty 22 - week old male SHR rats were randomly divided into four groups:SHR group,Fos group,and Fus + Los group.Five 22 - week old male WKY rats were used as control.The body weigh,cuff-tail blood pressure,urinary microprotein and urinary N-acetyl-β-D-glucesaminidase were determined.RT-PCR were applied to determine the expression of adiponectin Mrna in adipose tissues.Results At the eighth week,systolic blood pressure of rats in SHR group was significantly higher than those in the other four groups (P＜0.05).The levels of urinary microprotein,urinary NAGase in the WKY group,Fos group,Los group and Fos + Los group were significantly lower than those in SHR group(P＜0.05).RT-PCR analysis revealed that the expression of adiponectin Mrna in SHR group was obviously decreased,compared with WKY goup.Adiponectin Mrna expression in Los group,Fos group and Fos + Los group were increased compared with SHR group(P＜0.05).Conclusions The expression of adiponeetin Mrna is down-regulated in adipose tissues of SHR.After intervention with Fusinopril and Losartan,the adiponectin Mrna expression was up-regulated in adipose tissues of SHR,the levels of urinary microprotein and urinary NAGase were obviously increased in SHR and the levels of urinary microprotein and urinary NAGase were obviously decreased.