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瘦素对肥胖哮喘大鼠气道平滑肌细胞干扰素调节因子1表达的影响 被引量:1

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摘要 目的观察体外培养肥胖哮喘大鼠气道平滑肌细胞(ASMC)表达瘦素受体(OB-R)及干扰素调节因子1(IRF-1)情况,及给予瘦素干预后IRF-1的变化。方法 60只雄性SD大鼠随机分为4组,即正常体质量对照组(A组)、正常体质量哮喘组(B组)、肥胖对照组(C组)、肥胖哮喘组(D组),肥胖及哮喘模型建立后取各组大鼠气道,体外培养ASMC,逆转录酶PCR(RT-PCR)测各组OB-R mRNA的表达,然后分别用生理盐水(NS)和瘦素干预A、B、C、D组细胞48 h,Western blot法检测各组IRF-1蛋白表达。结果 RT-PCR电泳结果示在500 bp处有明显条带,其大小与OB-R目的基因片段大小相符,说明AMSC上有OB-R表达。Western blot检测显示,细胞IRF-1蛋白表达量在NS干预的情况下,B、C组均较A组细胞IRF-1蛋白表达量增加(P<0.05),但均比D组减弱(P<0.05),而B、C两组蛋白表达量之间无明显差异(P>0.05)。在瘦素干预的情况下,各组细胞IRF-1蛋白表达量均分别较相应的NS干预组的蛋白表达量增加(P<0.01),且B、C组细胞GRβ蛋白表达量均较A组增加(P<0.05),较D组减弱(P<0.05),而B、C组蛋白表达量之间仍无明显差异(P>0.05)。结论瘦素通过OB-R促进IRF-1在肥胖哮喘大鼠ASMC中的表达可能是导致肥胖哮喘发生激素抵抗的重要原因。
出处 《山东医药》 CAS 2012年第40期37-39,105,共3页 Shandong Medical Journal
基金 徐州市科技局资助项目(XM09B077)
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