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脑出血大鼠肝、肠组织中内毒素及其受体CD14的基因表达与多器官功能障碍综合征的关系 被引量:4

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摘要 目的观察内毒素及其受体CD14在脑出血大鼠肝、肠组织中的mRNA表达情况,探讨脑出血并发多器官功能障碍综合征(MODS)的可能机制。方法向大鼠尾状核注入胶原酶建立脑出血模型,将大鼠分为对照组、假手术组及出血后4、8、12、24、36、48、72 h 7个亚组。依据动物全身炎症反应综合征(SIRS)和MODS的诊断标准判断SIRS和MODS的发生率;采用改良基质显色法鲎试验测定血浆内毒素含量;原位杂交实验检测内毒素受体CD14 mRNA表达。结果大鼠脑出血后SIRS发生率为100%,MODS发生率为67.9%。出血组内毒素含量明显升高,与对照组、假手术组比较有统计学差异(P均<0.01)。出血组肝、肠组织CD14 mRNA表达均显著升高(P均<0.01),24~36 h达高峰,72 h仍维持较高水平,以小肠变化最显著(P<0.01)。相关分析表明,小肠组织内毒素受体CD14 mRNA表达与血浆内毒素呈正相关(r=0.398,P<0.05)。结论大鼠脑出血并MODS模型存在内毒素血症和肝肠组织内毒素受体CD14的异常表达,内毒素—内毒素受体—炎性介质间相互作用所致SIRS可能是脑出血并发MODS的发病机制之一。
出处 《山东医药》 CAS 2012年第37期30-32,共3页 Shandong Medical Journal
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