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中文摘要：
目的研究褪黑素(MT)对氨基半乳糖(D-GalN)与细菌脂多糖(LPS)共处理引起小鼠急性肝损伤的保护作用。方法建立GalN/LPS引起的小鼠急性肝脏损伤模型。于GalN/LPS共处理前30min和处理后1h、2h分别经腹腔注射给予MT,经GalN/LPS共处理8h后剖杀动物,取血和肝脏,检测血清丙氨酸氨基转移酶(ALT)活力、肿瘤坏死因子α(TNF-α)和一氧化氮(NO)水平,测定肝脏组织Caspase-3活性、还原性谷胱甘肽(GSH)含量、谷胱甘肽还原酶(GSH-RD)和谷胱甘肽过氧化物酶(GSH-PX)活性,采用DNA梯度分析实验检测肝脏凋亡,并对小鼠部分肝脏进行病理组织学检查。结果与模型组比较,MT处理组小鼠血清ALT活力和TNF-α含量明显下降,肝脏Caspase-3活性、GSH损耗明显降低,肝组织GSH-RD和GSH-PX活性明显升高,DNA凋亡条带较前有所减弱,而MT对体内NO生成无明显影响。结论MT对GalN/LPS引起小鼠急性肝损伤有保护作用,主要通过其抗炎、抗氧化和抗凋亡作用。
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