• the General Surgery Center of PLA, General Hospital of Chengdu Military Region, Chengdu 610083, China;
WANG Yu, Email: wangyu_rick@163.com
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目的:研究离体肝脏缺血再灌注期间丝裂原活化蛋白激酶(mitogen activated protein kinase,p38MAPK)信号转导途径对细胞间黏附分子1(intercellular adhesion molecular 1,ICAM1)mRNA表达的影响。方法:建立兔离体肝脏缺血再灌注模型,对照组(n=12):灌注液中不加特异性p38MAPK抑制剂SB202190,抑制组(n=12):灌注液中加入SB202190(浓度为3μmol/L)。于肝脏离体前,冷保存末,再灌注10min、30min、60min及120min时获取离体肝组织标本。分别应用Western-blot法及免疫沉淀法检测离体肝组织中p38MAPK表达的水平及活性,原位杂交法检测ICAM1 mRNA表达水平。结果:与离体前相较,对照组p38MAPK活性在冷保存末及再灌注10min、30min、60min显著性增高(P lt;0.01),而再灌注120min时活性与离体前相较无明显差异(P gt;0.05);抑制组p38MAPK活性在各时相点的变化无显著性差异(P gt;0.05),除离体前及再灌注120min两组肝脏的p38MAPK活性无显著性差异外,其余各时相点p38MAPK活性均显著性低于对照组(P lt;0.01)。离体前、冷保存末及再灌注10min及30min时,两组肝组织中仅有少量ICAM1 mRNA表达,组间及组内比较无显著性差异(P gt;0.05);至再灌注60min及120min,对照组ICAM1 mRNA的表达水平显著性高于组内其它时相点(P lt;0.01),而抑制组虽然也显著高于组内其它时相点(P lt;0.05),但却显著性低于同时相点对照组的表达水平(P lt;0.01)。离体再灌注期间供肝组织中p38MAPK活性与供肝组织内ICAM1 mRNA的表达水平呈显著性正相关(r=0.985,P lt;0.01)。结论:p38MAPK对ICAM1生成的调节作用层次可能在转录水平,提示p38MAPK信号转导途径对ICAM1 mRNA的调节可能是导致离体肝脏缺血再灌注损伤的重要机制之一。

Citation: WANG Yu,TANG Lijun,DAI Ruiwu,et al. Effect of p38MAPK Pathway on ICAM1 mRNA Expression of Isolated Rabbit Liver Tissue during Early Stage of Cold Preservation and Reperfusion Period. West China Medical Journal, 2009, 24(8): 2087-2091. doi: Copy

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