Abstract
目的 探讨人重组生长激素(rhGH)减轻梗阻性黄疸时肠源性细菌及内毒素移位的作用及机制.方法 Wister大鼠42只分为3组:假手术组(SO组)、胆总管结扎组(BDL组)及rhGH治疗组(rhGH组).实验1周后检测各组肝功指标的变化及血浆内毒素水平,取肝、肾、肠系膜淋巴结等肠道外器官组织做细菌培养,电镜观察末端回肠黏膜变化.结果 rhGH组多项肝功指标较BDL组明显改善,rhGH组血浆内毒素水平为(0.38±0.03)EU/ml,较BDL组的(0.65±0.04)EU/ml明显降低(P 0.05).BDL组肝、肾、肠系膜淋巴结中细菌移位率高于另两组,其中肠系膜淋巴结细菌移位率为64.29%,明显高于SO组及rhGH组(P 0.05).电镜显示BDL组肠黏膜上皮细胞坏死,细胞核固缩,线粒体肿胀变性,内质网明显扩张.rhGH组肠黏膜上皮改变较BDL组明显减轻,接近SO组所见.结论应用rhGH可保护梗阻性黄疸时小肠黏膜屏障功能,减少肠源性细菌/内毒素移位的发生。
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