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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Rajewsky, K. Kunkel, D. Scheffold, A. Polic, B. |
| Description | Author Affiliation: Polic B ( Department of Immunology, Institute for Genetics, University of Cologne, Weyertal 121, 50931 Cologne, Germany. bojanp@medri.hr); |
| Abstract | On deletion of the gene encoding the constant region of the T cell antigen receptor (TCR)alpha chain in mature T cells by induced Cre-mediated recombination, the cells lose most of their TCR from the cell surface within 7--10 days, but minute amounts of surface-bound TCR beta chains are retained for long periods of time. In a situation in which cellular influx from the thymus is blocked, TCR-deficient naive T cells decay over time, the decay rates being faster for CD8(+) cells (t(1/2) approximately 16 days) than for CD4(+) cells (t(1/2) approximately 46 days). TCR(+) naïve cells are either maintained (CD8(+)) or decay more slowly (CD4(+); t(1/2) approximately 78 days.) Numbers of TCR-deficient memory T cells decline very slowly (CD8(+) cells; t(1/2) approximately 52 days) or not at all (CD4(+) cells), but at the population level, these cells fail to expand as their TCR(+) counterparts do. Together with earlier data on T cell maintenance in environments lacking appropriate major histocompatibility complex antigens, these data argue against the possibility that spontaneous ligand-independent signaling by the alpha beta TCR contributes significantly to T-cell homeostasis. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 15 |
| Volume Number | 98 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2001-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | CD4-Positive T-Lymphocytes Immunology CD8-Positive T-Lymphocytes Receptors, Antigen, T-Cell, Alpha-beta Animals Mice Mice, Inbred C57BL Time Factors Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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