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  • Title: HLA-G: At the Interface of Maternal-Fetal Tolerance.
    Author: Ferreira LMR, Meissner TB, Tilburgs T, Strominger JL.
    Journal: Trends Immunol; 2017 Apr; 38(4):272-286. PubMed ID: 28279591.
    Abstract:
    During pregnancy, semiallogeneic fetal extravillous trophoblasts (EVT) invade the uterine mucosa without being rejected by the maternal immune system. Several mechanisms were initially proposed by Peter Medawar half a century ago to explain this apparent violation of the laws of transplantation. Then, three decades ago, an unusual human leukocyte antigen (HLA) molecule was identified: HLA-G. Uniquely expressed in EVT, HLA-G has since become the center of the present understanding of fetus-induced immune tolerance. Despite slow progress in the field, the last few years have seen an explosion in our knowledge of HLA-G biology. Here, we critically review new insights into the mechanisms controlling the expression and function of HLA-G at the maternal-fetal interface, and discuss their relevance for fetal tolerance.
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