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Central Tolerance to Tissue-specific Antigens Mediated by Direct and Indirect Antigen Presentation

Open access
Gallegos, Alena M., Bevan, Michael J.·2004·The Journal of Experimental Medicine

Abstract

Intrathymic expression of tissue-specific antigens (TSAs) by medullary thymic epithelial cells (Mtecs) leads to deletion of autoreactive T cells. However, because Mtecs are known to be poor antigen-presenting cells (APCs) for tolerance to ubiquitous antigens, and very few Mtecs express a given TSA, it was unclear if central tolerance to TSA was induced directly by Mtec antigen presentation or indirectly by thymic bone marrow (BM)-derived cells via cross-presentation. We show that professional BM-derived APCs acquire TSAs from Mtecs and delete autoreactive CD8 and CD4 T cells. Although direct antigen presentation by Mtecs did not delete the CD4 T cell population tested in this study, Mtec presentation efficiently deleted both monoclonal and polyclonal populations of CD8 T cells. For developing CD8 T cells, deletion by BM-derived APC and by Mtec presentation occurred abruptly at the transitional, CD4high CD8low TCRintermediate stage, presumably as the cells transit from the cortex to the medulla. These studies reveal a cooperative relationship between Mtecs and BM-derived cells in thymic elimination of autoreactive T cells. Although Mtecs synthesize TSAs and delete a subset of autoreactive T cells, BM-derived cells extend the range of clonal deletion by cross-presenting antigen captured from Mtecs.

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Metadata

Authors
Gallegos, A. M., & Bevan, M. J.
Venue
The Journal of Experimental Medicine
Published
2004-10-18
Volume
200
Issue
8
Pages
1039-1049
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2159573388
Cited by
490
References
34
FWCI
9.23
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Central Tolerance to Tissue-specific Antigens Mediated by Direct and Indirect Antigen Presentation. https://app.cochat.ai/papers/10.1084/jem.20041457
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Gallegos, A. M., & Bevan, M. J. (2004). Central Tolerance to Tissue-specific Antigens Mediated by Direct and Indirect Antigen Presentation. The Journal of Experimental Medicine. https://doi.org/10.1084/jem.20041457

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