【摘 要】
：
目的:初步探讨在急性腹腔感染时肠上皮细胞Toll样受体(TLR)及其下游信号分子的表达规律及对肠黏膜屏障的作用. 方法:将大鼠随机分为对照组和实验组,实验组又按手术后时间分为
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目的:初步探讨在急性腹腔感染时肠上皮细胞Toll样受体(TLR)及其下游信号分子的表达规律及对肠黏膜屏障的作用. 方法:将大鼠随机分为对照组和实验组,实验组又按手术后时间分为2 h组、6 h组、12 h组和24 h组.实验组采用盲肠结扎穿孔模型,并检测各组末端回肠黏膜上TLR2、TLR4和TLR9的mRNA表达情况,NF-κB的活性,血清IL-6和TNF-α水平以及肠道的通透性水平. 结果:随着腹腔感染时间的延长,TLR2的mRNA表达逐渐增高,至12 h最高,随后略有下降,与对照组相比,自6 h开始其间有极显著性差异(P≤0.01);TLR4的mRNA表达6 h达高峰,与对照组比有极显著性差异(P≤0.01);TLR9的mRNA表达12 h达高峰,与对照组比有显著性差异(P≤0.05).TLR2与肠道通透性的相关性明显高于TLR4和TLR9. 结论:重度腹腔感染早期,肠道中的TLR就可能通过调节促炎因子和炎性因子来调控肠黏膜屏障的通透性,其中TLR2起着更关键的作用.
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