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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Benakanakere, Manjunatha R. Garcia, Carlos A. Kinane, Denis F. Martin, Michael Alard, Pascale Kosiewicz, Michelle M. |
| Description | Country affiliation: United States Author Affiliation: Garcia CA ( Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, KY 40292, USA.) |
| Abstract | Signals induced by the TCR and CD28 costimulatory pathway have been shown to lead to the inactivation of the constitutively active enzyme, glycogen synthase kinase-3 (GSK3), which has been implicated in the regulation of IL-2 and T cell proliferation. However, it is unknown whether GSK3 plays a similar role in naive and memory CD4(+) T cell responses. Here we demonstrate a divergence in the dependency on the inactivation of GSK3 in the proliferative responses of human naive and memory CD4(+) T cells. We find that although CD28 costimulation increases the frequency of phospho-GSK3 inactivation in TCR-stimulated naive and memory CD4(+) T cells, memory cells are less reliant on GSK3 inactivation for their proliferative responses. Rather we find that GSK3beta plays a previously unrecognized role in the selective regulation of the IL-10 recall response by human memory CD4(+) T cells. Furthermore, GSK3beta-inactivated memory CD4(+) T cells acquired the capacity to suppress the bystander proliferation of CD4(+) T cells in an IL-10-dependent, cell contact-independent manner. Our findings reveal a dichotomy present in the function of GSK3 in distinct human CD4(+) T cell populations. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| Journal | The Journal of Immunology |
| Issue Number | 12 |
| Volume Number | 181 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2008-12-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cd4-positive T-lymphocytes Enzymology Immunology Glycogen Synthase Kinase 3 Physiology Immunologic Memory Bystander Effect Cytology Metabolism Cell Proliferation Cells, Cultured Antagonists & Inhibitors Interleukin-10 Biosynthesis Lymphocyte Activation Lymphocyte Count G0 Phase Signal Transduction T-lymphocyte Subsets Comparative Study Research Support, N.i.h., Extramural Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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