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Journal of Experimental Medicine, Vol 177, 1153-1164, Copyright © 1993 by Rockefeller University Press
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A Bonomo and P Matzinger
Laboratory for Cellular and Molecular Immunology, National Institute of Allergy and Infectious Disease, National Institutes of Health, Bethesda, Maryland 20892.
Most current models of T cell development include a positive selection step in the thymus that occurs when T cells interact with thymic epithelium and a negative selection step after encounters with bone marrow-derived cells. We show here that developing T cells are tolerized when they recognize antigens expressed by thymic epithelium, that the tolerance is tissue specific, and that it can occur by deletion of the reactive T cells.
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