IL-10、IL-18在重症急性胰腺炎肺损伤中的作用

目的探讨重症急性胰腺炎（SAP）中IL-10及IL-18的表达及其与SAP肺损伤的关系。方法将48只SD大鼠按随机数字表法均分为对照组和SAP组，动态定量测定肺湿重系数、腹水量、血清淀粉酶、血清IL-10及IL-18的变化和半定量RT—PCR检测肺组织中IL-10 mRNA及IL-18 mRNA的表达，并在光镜下观察胰腺及肺组织病理学改变。结果各时相SAP组肺湿重系数、腹水量、血清淀粉酶、血清IL-10及IL-18水平和肺组织中IL-10 mRNA及IL-18 mRNA的表达与对照组相比均明显增高（P〈0．05，P〈0．01）。SAP组大鼠血清中IL-18水平和肺组织IL-18 mRNA表达水平均与肺湿重系数（r=0．68，P〈0．01；r=0．72，P〈0．01）及肺损伤病理评分（r=0．74，P〈0．01；r=0．79，P〈0．01）呈正相关，而血清中IL-10水平和肺组织IL-10 mRNA表达水平均与肺湿重系数（r=O．62，P〈0．01；r==0．69，P〈0．01）及肺损伤病理评分（r=-0．66，P〈0．01；r=-0．60，P〈0．01）呈负相关。结论IL-18参与了SAP并发肺损伤的病理过程，而IL-10对肺损伤有保护作用。

Effect of IL-10 and IL-18 on Acute Lung Injury of Severe Acute Pancreatitis

Objective To investigate the role of interleukin-10(IL-10) and interleukin-18 (IL-18) in the pathogenesis of acute lung injury in experimental severe acute pancreatitis.Methods Forty-eight SD rats were divided into control group and SAP group by the random data table. The model of experimental severe acute pancreatitis was established by injection of 3.5% sodium taurocholate into the bili-pancreatic duct. Lung wet weight index, ascities and level of serum amylase, IL-10 and IL-18 were quantitatively measured in different time. Intrapulmonary expressions of IL-10 mRNA and IL-18 mRNA were detected by semi-quantitative RT-PCR. The histopathology of pancreas and lung were observed under the light microscope.Results Lung wet weight index, ascities, level of serum amylase, IL-10 and IL-18, intrapulmonary expressions of IL-10 mRNA and IL-18 mRNA were significantly increased in SAP group (P<0.01). The level of serum IL-18 and intrapulmonary expression of IL-18mRNA are positively correlated with lung wet weight index (r=0.68,P<0.01; r=0.72,P<0.01) and lung injury score (r=0.74,P< 0.01; r=0.79,P< 0.01) respectively, whereas the level of serum IL-10 and intrapulmonary expression of IL-10 mRNA are negatively correlated with lung wet weight index(r=-0.62,P<0.01; r=-0.69,P<0.01) and lung injury score(r=-0.66,P<0.01; r=-0.60,P<0.01). Conclusion IL-18 may play a key role in the pathogenesis of acute lung injury in experimental severe acute pancreatitis, and IL-10 exerts the protection role in this process.