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罗格列酮对内毒素致大鼠肺炎症的影响 被引量:1

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摘要 目的探讨过氧化物酶体增殖物激活受体γ(PPARγ)配体罗格列酮对内毒素致大鼠肺炎症的作用及其分子机制。方法36只SD大鼠随机分为:(1)生理盐水对照组(6只);(2)罗格列酮对照组(6只);(3)内毒素组(6只);(4)罗格列酮干预组(18只):根据罗格列酮不同灌胃剂量分为低、中、高剂量组,每组各6只。HE染色观察肺炎症情况;计数支气管肺泡灌洗液(BALF)中细胞总数、中性粒细胞数、巨噬细胞数;采用ELISA法检测BALF中TNF-α、IL-1β和IL-8含量;Western blot检测肺组织NF-κB,IκB-α表达。结果内毒素气管内注入后,大鼠肺炎症积分、BALF中细胞总数、中性粒细胞数、巨噬细胞数、TNF-α、IL-1β和IL-8水平及NF-κB表达较生理盐水对照组明显增加(P<0.05),低、中、高剂量罗格列酮干预后,除IL-1β外上述观察指标逐渐降低,组间比较差异有显著性(F分别为60.82,25.14,25.78,26.13,38.94,38.04,31.92,均P<0.01)。内毒素组IκB-α表达较生理盐水对照组明显降低(P<0.05);低、中、高剂量罗格列酮干预后,其表达逐渐增加,组间比较差异有显著性(F=47.61,P<0.01)。相关性分析示内毒素组NF-κB表达与肺炎症积分、BALF中细胞总数、中性粒细胞数、巨噬细胞数、TNF-α、IL-1β和IL-8水平呈正相关(r分别为0.839,0.860,0.905,0.933,0.746,0.916,0.872,P<0.05)。结论罗格列酮能够减轻内毒素诱导的肺炎症损伤反应,其具体机制可能是通过抑制NF-κB表达,抑制炎性细胞因子释放而发挥作用。
出处 《广东医学》 CAS CSCD 北大核心 2009年第7期1039-1042,共4页 Guangdong Medical Journal
基金 贵州省卫生厅优秀医学青年人才基金资助项目(编号:黔卫发[2005]138号)
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