基础医学与临床 ›› 2011, Vol. 31 ›› Issue (9): 1015-1020.

• 研究论文 • 上一篇    下一篇

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

张新颖1,程红霞2,刘奉琴3,刘海燕3,刘玲4,王伟3,王玉林3   

  1. 1. 山东大学附属省立医院
    2. 山东大学附属省立医院病理科
    3. 山东大学附属省立医院儿科
    4. 山东大学第二医院临床分子生物学实验室
  • 收稿日期:2010-10-27 修回日期:2010-12-10 出版日期:2011-09-05 发布日期:2011-09-05
  • 通讯作者: 张新颖 E-mail:zhangxy912@126.com

Effect of ulinastatin on mRNA of cytokine and p38 MAPK expression of rats with acute lung injury

  • Received:2010-10-27 Revised:2010-12-10 Online:2011-09-05 Published:2011-09-05

摘要: 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。

关键词: 乌司他丁, 急性肺损伤, 肿瘤坏死因子, 白细胞介素, p38 MAPK

Abstract: 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 5mg/kg, iv), and intervention group (UTI 50000U/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 methods. Results Expression of TNF-alpha mRNA at 0.5,1 and 3h in rats of model group is 78.55±18.99,128.74±34.79和12.29±1.32 folds against control group, which decreased to 20.95±1.45(p<0.01),58.15±11.01(p<0.01)和2.85±0.57(p<0.05)folds in intervention group. Expression of IL-10 mRNA at 0.5,1 and 3h in rats of model group is 20.89±4.60,38.20±8.26和53.26±8.01 folds against control group, which increased to 66.77±11.18(p<0.05),97.69±27.00(p<0.01)和128.62±42.30(p<0.01)folds against invention group. Administration of LPS elevated the expression of p38 MAPK, which were significantly attenuated by UTI at each time point((p<0.05). Conclusion UTI could attenuate ALI by regulating the gene expression of cytokines. P38 MAPK played role in the decreasing of TNF-alpha mRNA by UTI.

Key words: Ulinastatin, Acute lung injury, Tumor necrosis factor, Interleukin, P38 mitogen-activated protein kinase

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