Tumor necrosis factor -a (TNF- a)was consideral to be a key mediator in the pathogenesis of endotoxin hepatoxicity. However, the precise mechanism by which TNF- a mediate liver injury remains un certain. Many results ...Tumor necrosis factor -a (TNF- a)was consideral to be a key mediator in the pathogenesis of endotoxin hepatoxicity. However, the precise mechanism by which TNF- a mediate liver injury remains un certain. Many results have shown that TNF - a could mediate neutrophil adherence, activate phospholipase A2, induce Pedction of lipid ndators, fine radicals and so on, all of which played fort role in development of liver injury. This article reviewed recent infonnations about cytotoxic mechanism of TNF -展开更多
1989年美国Choo等应用分子克隆技术,从受感染的黑猩猩血液标本中找到了一个与本病恢复期血清起阳性反应的克隆,命名丙型肝炎病毒(hepatitis C virus,HCV),由其引起的肝炎命名为丙型肝炎(hepatitis C,HC).初步研究表明在电镜下HCV为RNA病...1989年美国Choo等应用分子克隆技术,从受感染的黑猩猩血液标本中找到了一个与本病恢复期血清起阳性反应的克隆,命名丙型肝炎病毒(hepatitis C virus,HCV),由其引起的肝炎命名为丙型肝炎(hepatitis C,HC).初步研究表明在电镜下HCV为RNA病毒,其直径为55nm,呈球形颗粒,HCV基因组总长9 416个核苷酸,为单股正链,有一个大的开放读码框架,能编码3 014个氨基酸多肽,基因组的两侧分别为5'和3'端的非编码区,编码区从5'端依次为核蛋白(C)区,包膜蛋白(E)区和非结构(NS)区.后者又分为NS1、NS2、NS6、NS4、NS5、等区,NS1又称为E2/NS1.C区基因编码核壳蛋白,E1E2/NS1编码包膜糖蛋白,两者为病毒结构蛋白,NS2、NS6、NS4、NS5区各自编码不同功能的非结构蛋白,其中NS5编码HCV基因组螺旋酶,NS5编码HCV基因组的复制酶.传染源是急、慢性患者和亚临床感染者.传染播途径主要为输血及血液制品,也可通过血液透析、单采血浆、肾移植、性接触、静脉吸毒、母婴传播等.展开更多
文摘Tumor necrosis factor -a (TNF- a)was consideral to be a key mediator in the pathogenesis of endotoxin hepatoxicity. However, the precise mechanism by which TNF- a mediate liver injury remains un certain. Many results have shown that TNF - a could mediate neutrophil adherence, activate phospholipase A2, induce Pedction of lipid ndators, fine radicals and so on, all of which played fort role in development of liver injury. This article reviewed recent infonnations about cytotoxic mechanism of TNF -