Abstract:
:Chronic hepatitis C infection leads to increased hepatocyte apoptosis. Because engulfment of apoptotic bodies (ABs) by hepatic stellate cells (HSC) is profibrogenic, we compared the effects of ABs derived from hepatitis C virus (HCV)-negative vs HCV-infected (Con1+) Huh7 hepatoblastoma cells on fibrogenic and activation-related mRNA expression by a human HSC line (LX2). Uptake of Huh7(Con1+) ABs by LX2 cells dose dependently upregulated profibrotic genes (COL1A1, TGFB1; TIMP1; TIMP2). When normalized to the apoptotic cytokeratin-18 M30 neoepitope, HCV(+) ABs exhibited a more pronounced effect than HCV(-) ABs. In contrast, neither noningested ABs nor nucleic acids obtained from Huh7, Huh7(Con1+) or HepG2 cells triggered those AB-dependent effects. Both the engulfment of Huh7(Con1+) ABs and their effects were partially blocked by masking of phosphatidylserine with annexin V and completely inhibited by the class-A scavenger receptor ligand, polyinosinic acid. Our findings demonstrate that AB uptake stimulates HSCs and indicate that HCV infection leads to amplified fibrogenic mRNA expression and enhanced HSC activation.
journal_name
J Viral Hepatjournal_title
Journal of viral hepatitisauthors
Gieseler RK,Marquitan G,Schlattjan M,Sowa JP,Bechmann LP,Timm J,Roggendorf M,Gerken G,Friedman SL,Canbay Adoi
10.1111/j.1365-2893.2010.01362.xsubject
Has Abstractpub_date
2011-11-01 00:00:00pages
760-7issue
11eissn
1352-0504issn
1365-2893pii
JVH1362journal_volume
18pub_type
杂志文章abstract::Hepatitis C virus (HCV) and HIV are major causes of worldwide disease. We aimed to evaluate the effect of a combined screening programme, which included a risk-assessment questionnaire and rapid tests for point-of-care diagnosis, on screening and new diagnosis rates. This prospective, cluster randomized study was carr...
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pub_type: 杂志文章,多中心研究,随机对照试验
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pub_type: 杂志文章
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pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
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pub_type: 杂志文章
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pub_type: 杂志文章,多中心研究
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pub_type: 杂志文章,随机对照试验
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pub_type: 临床试验,杂志文章,随机对照试验
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