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    Nat Immunol. 2005 Jun;6(6):593-9. Epub 2005 May 1.

    Peptides chaperoned by heat-shock proteins are a necessary and sufficient source of antigen in the cross-priming of CD8+ T cells.

    Binder RJ, Srivastava PK.

    Source

    Center for Immunotherapy of Cancer and Infectious Diseases, University of Connecticut School of Medicine, Farmington, Connecticut 06030, USA.

    Abstract

    The form in which antigens are transferred from cancer cells or infected cells to antigen-presenting cells as a part of the process of priming CD8(+) T cells has been a longstanding unresolved issue. Intact proteins or protein fragments in the form of free peptides or peptides chaperoned by heat-shock protein are possible sources of antigen. We address this here using beta-galactosidase and ovalbumin. Immunization with cell lysates containing intact proteins and heat-shock protein-peptide complexes or with cell lysates depleted of either component demonstrated that protein fragments chaperoned by heat-shock protein and not intact protein were the necessary and sufficient source of antigen transferred to antigen-presenting cells for priming CD8(+) T cell responses.

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    PMID:
    15864309
    [PubMed - indexed for MEDLINE]

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