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Proteomic profiling of lipid droplet proteins in hepatoma cell lines expressing hepatitis C virus core protein.

Abstract：

:Hepatitis C virus (HCV) core protein has been suggested to play crucial roles in the pathogeneses of liver steatosis and hepatocellular carcinomas due to HCV infection. Intracellular HCV core protein is localized mainly in lipid droplets, in which the core protein should exert its significant biological/pathological functions. In this study, we performed comparative proteomic analysis of lipid droplet proteins in core-expressing and non-expressing hepatoma cell lines. We identified 38 proteins in the lipid droplet fraction of core-expressing (Hep39) cells and 30 proteins in that of non-expressing (Hepswx) cells by 1-D-SDS-PAGE/MALDI-TOF mass spectrometry (MS) or direct nanoflow liquid chromatography-MS/MS. Interestingly, the lipid droplet fraction of Hep39 cells had an apparently lower content of adipose differentiation-related protein and a much higher content of TIP47 than that of Hepswx cells, suggesting the participation of the core protein in lipid droplet biogenesis in HCV-infected cells. Another distinct feature is that proteins involved in RNA metabolism, particularly DEAD box protein 1 and DEAD box protein 3, were detected in the lipid droplet fraction of Hep39 cells. These results suggest that lipid droplets containing HCV core protein may participate in the RNA metabolism of the host and/or HCV, affecting the pathopoiesis and/or virus replication/production in HCV-infected cells.

journal_name

J Biochem

journal_title

Journal of biochemistry

authors

Sato S,Fukasawa M,Yamakawa Y,Natsume T,Suzuki T,Shoji I,Aizaki H,Miyamura T,Nishijima M

doi

10.1093/jb/mvj104

subject

Has Abstract

pub_date

2006-05-01 00:00:00

pages

921-30

issue

5

eissn

0021-924X

issn

1756-2651

pii

139/5/921

journal_volume

139

pub_type

杂志文章

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