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Constitutive resistance to viral infection in human CD141+ dendritic cells

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  • Constitutive resistance to viral infection in human CD141+ dendritic cells

    Sci Immunol. 2017 Jul 7;2(13). pii: eaai8071. doi: 10.1126/sciimmunol.aai8071.
    Constitutive resistance to viral infection in human CD141+ dendritic cells.

    Silvin A1, Yu CI2,3,4, Lahaye X1, Imperatore F5, Brault JB6, Cardinaud S7,8, Becker C9, Kwan WH10,11,12, Conrad C1, Maurin M1, Goudot C1, Marques-Ladeira S1, Wang Y2, Pascual V2, Anguiano E2, Albrecht RA10,11, Iannacone M13, Garc?a-Sastre A10,11,12, Goud B6, Dalod M5, Moris A7, Merad M14, Palucka AK15,3,4, Manel N16.
    Author information

    Abstract

    Dendritic cells (DCs) are critical for the launching of protective T cell immunity in response to viral infection. Viruses can directly infect DCs, thereby compromising their viability and suppressing their ability to activate immune responses. How DC function is maintained in light of this paradox is not understood. By analyzing the susceptibility of primary human DC subsets to viral infections, we report that CD141+ DCs have an innate resistance to infection by a broad range of enveloped viruses, including HIV and influenza virus. In contrast, CD1c+ DCs are susceptible to infection, which enables viral antigen production but impairs their immune functions and survival. The ability of CD141+ DCs to resist infection is conferred by RAB15, a vesicle-trafficking protein constitutively expressed in this DC subset. We show that CD141+ DCs rely on viral antigens produced in bystander cells to launch cross-presentation-driven T cell responses. By dissociating viral infection from antigen presentation, this mechanism protects the functional capacity of DCs to launch adaptive immunity against viral infection.
    Copyright ? 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.


    PMID: 28783704 DOI: 10.1126/sciimmunol.aai8071
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