Cyp2e1基因在肝硬化和阻塞性黄疸肝组织中的表达

Expression of cyp2e1 gene in liver tissue in patients with hepatic cirrhosis and obstuctive jaundice

为比较 cyp2 e1基因在肝硬化和阻塞性黄疸及正常肝组织中的表达差异 ,并探讨其麻醉药理学意义 ,取肝炎后肝硬化、阻塞性黄疸肝组织及正常肝组织 (来自肝血管瘤患者 )标本 ,一步法抽提肝组织总 RNA,随机引物标记法制备 cyp2 e1c D-NA探针 ,Northern印迹法检测 cyp2 e1基因在以上 3种肝组织中的表达。结果发现阻塞性黄疸患者肝组织中 cyp2 e1基因表达量仅为正常肝组织的 2 1% ,而肝炎后肝硬化该基因表达量是正常肝的 98%。结果表明阻塞性黄疸肝组织 cyp2 e1基因表达显著降低 ,可能导致其功能蛋白 CYP2 E1同工酶含量减少 ;

In order to compare the difference of cyp2e1 gene expression between patients with hepatic cirrhosis and obstructive jaundice,and to investigate the pharmacologic significance behind this difference,liver samples were obtained from patients undergoing hepatic surgery with hepatic cirrhosis( n =7),obstructive jaundice( n =6) and normal tissue of hepatic angioma (controls, n =6). Total hepatic RNA were extracted using the one step method, cyp2e1 cDNA probe prepared by primer randomly marked method, and difference of cyp2e1 expression was compared among patients by Northern blotting.Compared with control group, the expressions of cyp2e1 in liver tissue among patients with obstructive jaundice were evidently reduced, while expression of this gene in cirrhosis liver was unaltered. CYP2E1 isoenzyme encoded by cyp2e1 decreased among patients with obstructive jaundice as expression of cyp2e1 gene significantly reduced, liver ability for metabolism of inhalant anesthetics declined consequently, under some special conditions, hepato nephric toxicity of anesthetics might be aggravated.