alexa HLA-G-mediated inhibition of antigen-specific cytotoxic T lymphocytes.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Le Gal FA, Riteau B, Sedlik C, KhalilDaher I, Menier C,

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Abstract In the present study, we demonstrate that the non-classical MHC class I molecule HLA-G impairs specific cytolytic T cell functions in addition to its well-established inhibition of NK lysis. The antigen-specific cytotoxic T lymphocyte (CTL) response analyzed was mediated by CD8(+) T cells specific for the influenza virus matrix epitope, M58-66, presented by HLA-A2. The transfection of HLA-G1 cDNA in target cells carrying the M58-66 epitope reduced their lysis by these virus-specific CTL. This HLA-G-mediated inhibition of antigen-specific CTL lysis was (i) peptide dose dependent, (ii) reversed by blocking HLA-G with a specific mAb and (iii) still observed despite the blockade of HLA-E/CD94/NKG2A interaction. By inhibiting both CTL and NK functions, HLA-G appears to have an extensive role in immune tolerance.
This article was published in Int Immunol and referenced in Journal of Stem Cell Research & Therapy

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