Abstract:
:Hepatitis C virus (HCV) induces chronic liver disease in hosts which can eventually progresses to liver cirrhosis and hepatocellular carcinoma. However, progression of liver disease is slower in patients with persistently normal levels of alanine aminotransferase (ALT) than in those with active hepatitis. Although distinct immune responses against HCV have been proposed in asymptomatic infection, the role of circulating dendritic cells (DC) in the pathogenesis of these patients remains obscure. To address this issue, we compared the number and function of myeloid DC (MDC) and plasmacytoid DC (PDC) between uninfected individuals and HCV-infected patients with or without elevated ALT levels. Numbers of DC and DC progenitors were significantly lower in patients with chronic active hepatitis than in control subjects. However, no differences were found in the number of DC between normal controls and HCV-infected patients with persistently normal ALT levels. MDC from patients with active hepatitis were less able to polarize naive CD4 T cells into the Th1 phenotype, while their MDC and PDC primed more CD4 T cells producing IL-10 than those from normal controls. Such dysfunction of DC was also observed in patients with persistently normal ALT levels. In conclusion, circulating DC decrease in number predominantly in HCV-infected patients with active hepatitis, and the function of DC is impaired even in those with normal ALT levels.
journal_name
Intervirologyjournal_title
Intervirologyauthors
Kanto T,Inoue M,Miyazaki M,Itose I,Miyatake H,Sakakibara M,Yakushijin T,Kaimori A,Oki C,Hiramatsu N,Kasahara A,Hayashi Ndoi
10.1159/000087264keywords:
subject
Has Abstractpub_date
2006-01-01 00:00:00pages
58-63issue
1-2eissn
0300-5526issn
1423-0100pii
87264journal_volume
49pub_type
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