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J. Exp. Med.,
Volume 187, Number 10, May 18, 1998 1555-1564
By

From the * Department of Oncology and the T cell tolerance to parenchymal self-antigens is thought to be induced by encounter of the T
cell with its cognate peptide-major histocompatibility complex (MHC) ligand expressed on the
parenchymal cell, which lacks appropriate costimulatory function. We have used a model system in which naive T cell receptor (TCR) transgenic hemagglutinin (HA)-specific CD4+ T
cells are adoptively transferred into mice expressing HA as a self-antigen on parenchymal cells.
After transfer, HA-specific T cells develop a phenotype indicative of TCR engagement and are rendered functionally tolerant. However, T cell tolerance is not induced by peptide-MHC
complexes expressed on parenchymal cells. Rather, tolerance induction requires that HA is
presented by bone marrow (BM)-derived cells. These results indicate that tolerance induction
to parenchymal self-antigens requires transfer to a BM-derived antigen-presenting cell that presents it to T cells in a tolerogenic fashion.
Department of Surgery, Johns Hopkins University School
of Medicine, Baltimore, Maryland 21205
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