目的探讨乌司他丁对脂多糖(LPS)致小鼠急性肺损伤的作用及其机制。方法小鼠腹腔注射乌司他丁(50和100 ku.kg-1)或等体积生理盐水30 m in后,分别静脉注射LPS 15 mg.kg-1或等体积生理盐水,于注射LPS后不同时间检测有关各项指标。ELISA法测定血清和肺组织中TNFα水平,RT-PCR法测定TNFαmRNA和iNOS mRNA的表达。W estern b lotting法检测c-Fos,c-Jun及iNOS等蛋白表达。结果乌司他丁100 ku.kg-1能显著降低LPS引起的小鼠的肺脏指数、肺组织及血清中NO水平的增加,下调肺组织c-Jun蛋白表达量和iNOS mRNA及其蛋白的表达量,而对小鼠的血清和肺组织冲洗液中TNFα含量以及肺组织MDA无明显影响。结论乌司他丁对LPS引起的小鼠肺损伤有保护作用,该作用与其抑制c-Jun蛋白和iNOS mRNA的表达有关。
【英文摘要】
Aim To study the protective action of ulinastatin against lipopolysaccharide(LPS)-induced acute lung injury in mice and the mechanism of its action.Methods Mice were intraperitoneally injected with ulinastatin(50 and 100 ku·kg~(-1)) or saline at a period of 12 h,separately,30 min after the last injection of ulinastatin,except normal control,all mice of other groups were injected a dose of LPS 15 mg·kg~(-1) via tail vein.The levels of TNFα in serum and lung were measured by ELISA.The expression of TNFα mRNA ...
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