• 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:研究離體肝臟缺血再灌注期間絲裂原活化蛋白激酶(mitogen activated protein kinase,p38MAPK)信號轉導途徑對細胞間黏附分子1(intercellular adhesion molecular 1,ICAM1)mRNA表達的影響。方法:建立兔離體肝臟缺血再灌注模型,對照組(n=12):灌注液中不加特異性p38MAPK抑制劑SB202190,抑制組(n=12):灌注液中加入SB202190(濃度為3μmol/L)。于肝臟離體前,冷保存末,再灌注10min、30min、60min及120min時獲取離體肝組織標本。分別應用Western-blot法及免疫沉淀法檢測離體肝組織中p38MAPK表達的水平及活性,原位雜交法檢測ICAM1 mRNA表達水平。結果:與離體前相較,對照組p38MAPK活性在冷保存末及再灌注10min、30min、60min顯著性增高(P lt;0.01),而再灌注120min時活性與離體前相較無明顯差異(P gt;0.05);抑制組p38MAPK活性在各時相點的變化無顯著性差異(P gt;0.05),除離體前及再灌注120min兩組肝臟的p38MAPK活性無顯著性差異外,其余各時相點p38MAPK活性均顯著性低于對照組(P lt;0.01)。離體前、冷保存末及再灌注10min及30min時,兩組肝組織中僅有少量ICAM1 mRNA表達,組間及組內比較無顯著性差異(P gt;0.05);至再灌注60min及120min,對照組ICAM1 mRNA的表達水平顯著性高于組內其它時相點(P lt;0.01),而抑制組雖然也顯著高于組內其它時相點(P lt;0.05),但卻顯著性低于同時相點對照組的表達水平(P lt;0.01)。離體再灌注期間供肝組織中p38MAPK活性與供肝組織內ICAM1 mRNA的表達水平呈顯著性正相關(r=0.985,P lt;0.01)。結論:p38MAPK對ICAM1生成的調節作用層次可能在轉錄水平,提示p38MAPK信號轉導途徑對ICAM1 mRNA的調節可能是導致離體肝臟缺血再灌注損傷的重要機制之一。

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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