乌司他丁对急性肺损伤大鼠TNT-α和IL-10 mRNA及p38 MAPK表达的影响响

 目的 探讨乌司他丁(UTI)对脂多糖（LPS）诱导急性肺损伤（ALI）大鼠的保护作用及分子生物学机制。方法 Wistar大鼠随机分为对照组、模型组(LPS 5mg/kg,iv)和干预组(UTI 50000U/kg,iv)，用Real time RT-PCR法检测肺组织TNF-α和IL-10 mRNA表达，用免疫组化染色和Western blot技术检测肺组织中p38 MAPK的表达。结果 模型组0.5、1和3hTNF-αmRNA的表达分别是对照组的78.55±18.99,128.74±34.79和12.29±1.32倍，UTI预后分别降至20.95±1.45（p<0.01）,58.15±11.01（p<0.01）和2.85±0.57（p<0.05）倍。模型组0.5、1和3hIL-10mRNA的表达分别是对照组的20.89±4.60,38.20±8.26和53.26±8.01倍，乌司他丁干预后分别升至66.77±11.18（p<0.05）,97.69±27.00（p<0.01）和128.62±42.30（p<0.01）倍。模型组p38 MAPK的表达在各个时点均明显升高，UTI干预后p38 MAPK的表达减弱(p<0.05)。结论 UTI通过调节细胞因子基因表达发挥其肺保护作用。p38 MAPK信号通路在UTI下调TNF-α mRNA的表达中发挥了作用。

Effect of ulinastatin on mRNA of cytokine and P38 MAPK expression of rats with acute lung injury

Objective To explore the protective effect of ulinastatin(UTI) in a rat model of lipopolysaccharide(LPS)-induced acute lung injury(ALI) and the underlying molecular mechanism.Methods Wistar rats were randomly assigned into: control group,model group(LPS 5 mg/kg,iv),and intervention group(UTI 50 000 U/kg,iv).Expression of TNF-alpha and IL-10 mRNA in lung tissue were measured by real time RT-PCR.Expression of phosphorylated P38 MAPK in lung tissue were detected by immunohistochemical staining and Western blot...