Uptake and presentation of hepatitis C virus-like particles by human dendritic cells

被引:74
作者
Barth, H
Ulsenheimer, A
Pape, GR
Diepolder, HM
Hoffmann, M
Neumann-Haefelin, C
Thimme, R
Henneke, P
Klein, R
Paranhos-Baccalà, G
Depla, E
Liang, TJ
Blum, HE
Baumert, TF
机构
[1] Univ Freiburg, Dept Med 2, D-79106 Freiburg, Germany
[2] Univ Munich, Dept Med 2, Klinikum Grosshadern, Munich, Germany
[3] Univ Freiburg, Childrens Hosp, Freiburg, Germany
[4] Univ Tubingen, Dept Med 2, Tubingen, Germany
[5] CNRS, CERVI, IFR 128, Lyon, France
[6] Innogenet NV, Ghent, Belgium
[7] NIDDK, Liver Dis Branch, NIH, Bethesda, MD USA
关键词
D O I
10.1182/blood-2004-05-1952
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Hepatitis C virus (HCV) is a major cause of chronic hepatitis worldwide. Interaction of dendritic cells (DCs) with viral particles may play an important role in the immunopathogenesis of HCV infection. Since the synthesis or purification of infectious virions is limited, we used HCV-like particles (HCV-LPs) to study the interaction of HCV with human DCs. Immature DCs exhibited an envelope-specific and saturable binding of HCV-LPs, indicating receptor-mediated DC-HCV-LP interaction. Confocal microscopy revealed that HCV-LPs were rapidly taken up by DCs in a temperature-dependent manner. Competition experiments demonstrated that C-type lectins such as mannose receptor or DC-SIGN (DC-specific intercellular adhesion molecule 3-grabbing nonintegrin) were not sufficient for mediating HCV-LP binding. HCV-LP uptake was followed by DC activation. DCs pulsed with HCV-LPs stimulated HCV core-specific CD4(+) T cells, indicating that uptake of HCV-LPs by DCs leads to antigen processing and presentation on major histocompatibility complex (MHC) class II molecules. Finally, HCV-LP-derived antigens were efficiently cross-presented to HCV core-specific CD8(+) T cells. These findings demonstrate that HCV-LPs represent a novel model system to study HCV-DC interaction allowing definition of the molecular mechanisms of HCV uptake, DC activation, and antigen presentation to T cells. Furthermore, HCV-LP-mediated DC activation and efficient antigen presentation may explain the marked immunogenicity of HCV-LPs in vivo.
引用
收藏
页码:3605 / 3614
页数:10
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