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  • Title: Involvement of Fas-Fas ligand interactions in graft rejection.
    Author: Martinez OM, Krams SM.
    Journal: Int Rev Immunol; 1999; 18(5-6):527-46. PubMed ID: 10672500.
    Abstract:
    The Fas/Fas ligand (FasL) pathway has been shown to be important in T lymphocyte-mediated cell death and is a key peripheral immunoregulatory mechanism that limits expansion of antigen-activated lymphocytes. The expression of Fas by commonly transplanted organs such as the heart, lung, kidney, and liver suggests that these tissues may be targets of FasL-expressing allospecific cytotoxic T lymphocytes. In this review the current literature examining the Fas/FasL system as a potential cellular effector pathway in tissue injury is discussed. In addition to a deleterious role in destruction of graft tissue, Fas/FasL interactions may have a beneficial role in transplantation. Recent studies suggest that modulation of FasL in target tissue leads to deletion, via apoptosis, of graft infiltrating lymphoid cells. However, an equally compelling series of reports indicate that overexpression of FasL can lead to a heightened immune response. These data are reviewed in the context of strategies to achieve long term allograft survival.
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