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    Science. 1998 Aug 21;281(5380):1191-3.

    Prevention of allogeneic fetal rejection by tryptophan catabolism.

    Source

    Program in Molecular Immunology, Institute of Molecular Medicine and Genetics, Medical College of Georgia, Augusta, GA 30912, USA.

    Abstract

    In 1953 Medawar pointed out that survival of the genetically disparate (allogeneic) mammalian conceptus contradicts the laws of tissue transplantation. Rapid T cell-induced rejection of all allogeneic concepti occurred when pregnant mice were treated with a pharmacologic inhibitor of indoleamine 2,3-dioxygenase (IDO), a tryptophan-catabolizing enzyme expressed by trophoblasts and macrophages. Thus, by catabolizing tryptophan, the mammalian conceptus suppresses T cell activity and defends itself against rejection.

    Comment in

    PMID:
    9712583
    [PubMed - indexed for MEDLINE]
    Free full text

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