脓毒症小鼠心和肾组织中巨噬细胞移动抑制因子的表达
The expression of macrophage migration inhibitory factor in the heart and renal tissue in rats with
目的 探讨巨噬细胞移动抑制因子(MIF)在脓毒症小鼠心脏和肾组织中的表达规律.方法采用盲肠结扎穿孔术(CLP)建立脓毒症BALB/c小鼠模型.30只小鼠随机分为5组,分别为假手术组,CLP后12、24、36、48 h组,其中假手术组小鼠在假手术后24 h取标本检测作为对照组,其余四组小鼠分别在CLP术后的12 h、24 h、36 h和48 h取标本待检.采用逆转录-聚合酶链反应(RT-PCR)和蛋白质免疫印迹法(Western Blotting)检测脓毒症小鼠心脏和肾组织中NIF的mRNA和蛋白表达.采用单因素方差分析(one-way AN0vA)方法进行计量资料的统计分析.结果 与对照组比较,MIF在脓毒症小鼠心脏组织中的表达增加,在CLP术后12 h开始升高(P<0.05),36 h达峰值(P<0.01),48h仍维持较高水平(P<0.05);肾组织中MIF mRNA的表达在CIP术后12 h开始增加(P<0.05),24h达峰值(P<0.01),48 h后才开始减少,MIF蛋白则只在CLP术后24 h和36 h增加明显(P<0.05).结论脓毒症发生后的12 h~48 h,MIF在脓毒症小鼠心脏和肾组织中的表达有不同程度增加,表达时相基本一致,提示N1F可作为晚期细胞因子参与小鼠脓毒症的发病.
更多Objective To investigate the expression profile of macrophage inhibitory factor (MIF) in heart and renal tissues of sepsis mice. Method The sepsis model was established by Cecal ligation and puncture (CLP) in mice. Thirty male BALB/c mice were randomly divided into five groups: sham operation group, the twelfth hour, twenty-forth hour, thirty-sixth and forty-eighth hour group after CLP. MIF mRNA were semiquantitat-ed by the reverse transcription polyraerase chain reaction(RT-PCR), Western Blotting was used for MIF protein. The measured data were analyzed with one-way ANOVA. Results MIF mRNA and protein expressions in heart tissue signifiantly increased at the twelfth hour, peaking at the thirty-sixth hour, and a high level was maintained till the forty-eighth hour after CLP. But in the kidney tissue of models, the content of MIF reached peak at the twenty-forth hour and started to decrease at the forty-eighth hour after CLP. Conclusions The content of MIF in heart and kidney tissues of sepsis models was higher than that in the sham group, especially from the twelfth hour to forty-eighth hour after CLP. It indicates that MIF as a kind of late cytokine might participate in dysfunction of organs in mice with sepsis.
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