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• W2035404191 abstract "Abstract Dendritic cells (DCs) facilitate HIV-1 spread in the host by capturing virions and transferring them to permissive lymphocytes in lymphoid organs. Lectins such as DC-specific ICAM-grabbing non-integrin (DC-SIGN) are involved in HIV-1 uptake by DCs, through high-affinity binding to viral envelope glycoproteins. We examined the role of DC-SIGN on the fate of incoming virions and on major histocompatibility complex class I (MHC-I)–restricted HIV-1 antigen presentation. We show that DC-SIGN expression in B-cell lines dramatically enhances viral internalization. In these cells, and also in primary DCs, most of the captured virions are rapidly degraded, likely in a lysosomal compartment. In addition, a fraction of incoming viral material is processed by the proteasome, leading to activation of anti–HIV-specific cytotoxic T lymphocytes (CTLs) by DC-SIGN–expressing cells. In DCs, DC-SIGN is not the only receptor involved, and redundant pathways of virus capture leading to antigen presentation likely coexist. Altogether, our results highlight new aspects of DC-SIGN interactions with HIV-1. The lectin does not significantly protect captured virions against degradation and promotes MHC-I exogenous presentation of HIV-1 antigens." @default.
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• W2035404191 date "2004-04-01" @default.
• W2035404191 modified "2023-09-30" @default.
• W2035404191 title "DC-SIGN promotes exogenous MHC-I–restricted HIV-1 antigen presentation" @default.
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• W2035404191 doi "https://doi.org/10.1182/blood-2003-07-2532" @default.
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