Reduced expression and functional impairment of Toll-like receptor 2 on dendritic cells in chronic hepatitis C virus infection.

Reduced expression and functional impairment of Toll-like receptor 2 on dendritic cells in chronic hepatitis C virus infection. Research Abstract Details 

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Reduced expression and functional impairment of Toll-like receptor 2 on dendritic cells in chronic hepatitis C virus infection. Abstract Text:

Takayuki Yakushijin,Tatsuya Kanto,Michiyo Inoue,Tsugiko Oze,Masanori Miyazaki,Ichiyo Itose,Hideki Miyatake,Mitsuru Sakakibara,Noriyoshi Kuzushita,Naoki Hiramatsu,Tetsuo Takehara,Akinori Kasahara,Norio Hayashi,

BACKGROUND: Dendritic cells (DCs) utilize Toll-like receptors (TLRs) to sense virus and initiate immune responses. We aimed at elucidating the roles of TLRs on DCs in hepatitis C virus (HCV) infection. METHODS: Monocyte-derived DCs were obtained from 32 healthy volunteers (HV) and 30 chronically HCV-infected patients (CH). TLR2, TLR3 and TLR4 expressions on immature DCs were quantified by real-time quantitative RT-PCR. We stimulated DCs with specific TLR ligands and examined DC maturation, cytokine production and ability to stimulate allogeneic CD4(+) T cells. RESULTS: TLR2 expression on immature DCs was lower in the CH group, whereas those of TLR3 or TLR4 were not different between the groups. Each TLR ligand induced DC maturation and stimulated them to release comparable levels of IL-12p70, IL-6, IL-10, TNF-alpha and IFN-beta between the groups. TLR2 and TLR4 ligands enhanced DC ability to stimulate T cell proliferation, with the degree due to the TLR2 ligand being lower in the CH group. CONCLUSIONS: In HCV infection, the TLR2 expression on DCs is reduced and TLR2-stimulated DCs show lesser ability to proliferate T cells than healthy counterparts, suggesting that the TLR2 system is involved in HCV-induced immunopathogenesis.

Reduced expression and functional impairment of Toll-like receptor 2 on dendritic cells in chronic hepatitis C virus infection. Publishing Authors By Initials

T Yakushijin,T Kanto,M Inoue,T Oze,M Miyazaki,I Itose,H Miyatake,M Sakakibara,N Kuzushita,N Hiramatsu,T Takehara,A Kasahara,N Hayashi,

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Reduced expression and functional impairment of Toll-like receptor 2 on dendritic cells in chronic hepatitis C virus infection. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Hepatology research : the official journal of the

VOLUME: 34

Page Numbers: 156-62

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ISSN: 1386-6346

DAY: 3

MONTH: 02

YEAR: 2006

Reduced expression and functional impairment of Toll-like receptor 2 on dendritic cells in chronic hepatitis C virus infection. Information

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LANGUAGE: eng

NlmUniqueID: 9711801

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Grant and Affiliation Information for Reduced expression and functional impairment of Toll-like receptor 2 on dendritic cells in chronic hepatitis C virus infection.

AFFILIATION: Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan.

Country: Netherlands

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MEDLINETA: Hepatol Res

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