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Blish CA, Gallay BJ, Turk GL, Kline KM, Wheat W, Fink PJ. Chronic Modulation of the TCR Repertoire in the Lymphoid Periphery. THE JOURNAL OF IMMUNOLOGY 1999. [DOI: 10.4049/jimmunol.162.6.3131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Using TCR Vβ5 transgenic mice as a model system, we demonstrate that the induction of peripheral tolerance can mold the TCR repertoire throughout adult life. In these mice, three distinct populations of peripheral T cells are affected by chronic selective events in the lymphoid periphery. First, CD4+Vβ5+ T cells are deleted in the lymphoid periphery by superantigens encoded by mouse mammary tumor viruses-8 and -9 in an MHC class II-dependent manner. Second, mature CD8+Vβ5+ T cells transit through a CD8lowVβ5low deletional intermediate during tolerance induction by a process that depends upon neither mouse mammary tumor virus-encoded superantigens nor MHC class II expression. Third, a population of CD4−CD8−Vβ5+ T cells arises in the lymphoid periphery in an age-dependent manner. We analyzed the TCR Vα repertoire of each of these cellular compartments in both Vβ5 transgenic and nontransgenic C57BL/6 mice as a function of age. This analysis revealed age-related changes in the expression of Vα families among different cellular compartments, highlighting the dynamic state of the peripheral immune repertoire. Our work indicates that the chronic processes maintaining peripheral T cell tolerance can dramatically shape the available TCR repertoire.
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Affiliation(s)
- Catherine A. Blish
- Department of Immunology, School of Medicine, University of Washington, Seattle, WA 98195
| | - Brian J. Gallay
- Department of Immunology, School of Medicine, University of Washington, Seattle, WA 98195
| | - Gail L. Turk
- Department of Immunology, School of Medicine, University of Washington, Seattle, WA 98195
| | - Khristina M. Kline
- Department of Immunology, School of Medicine, University of Washington, Seattle, WA 98195
| | - William Wheat
- Department of Immunology, School of Medicine, University of Washington, Seattle, WA 98195
| | - Pamela J. Fink
- Department of Immunology, School of Medicine, University of Washington, Seattle, WA 98195
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