Hepatitis B virus core protein interacts with CD59 to promote complement-mediated liver inflammation during chronic hepatitis B virus infection

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• 作者：Dong Liu ; Bing Ni ; Li Wang ; Mengjun Zhang ; Wei Liu ; Yuzhang Wu
• 关键词：HBV ; CD59 ; Inflammation ; HBc ; Complement ; MAC
• 刊名：FEBS Letters
• 出版年：2013
• 出版时间：11 October, 2013
• 年：2013
• 卷：587
• 期：20
• 页码：3314-3320
• 全文大小：1732 K

文摘

The inflammatory response mediated by the immune system is the major cause of hepatitis B virus (HBV)-associated liver injury. Here, we identified CD59, as a novel HBc-interacting protein in hepatocytes by tandem affinity purification (TAP) screening. The expression of CD59 was markedly down-regulated in HBc-transfected HepG2 or HepG2.215 cells, which resulted in an upshift of hepatocyte sensitivity to membrane attack complex (MAC)-induced cell lysis. These results were consistent with the accumulation of MACs in the liver of HBV-infected patients. Additional analyses using laser confocal microscopy, quantitative PCR and flow cytometry revealed that CD59 was specifically translocated to the nucleus upon binding to HBc, which induced the down-regulation of CD59 on both the mRNA and protein levels.