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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Nunes-Alves, Cláudio Booty, Matthew G. Carpenter, Stephen M. Jayaraman, Pushpa Behar, Samuel M. |
| Description | Author Affiliation: Booty MG ( Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA 01655); Nunes-Alves C ( Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA 01655); Carpenter SM ( Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA 01655); Jayaraman P ( Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA 01655); Behar SM ( Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA 01655) |
| Abstract | The differentiation of effector CD8(+) T cells is a dynamically regulated process that varies during different infections and is influenced by the inflammatory milieu of the host. In this study, we define three signals regulating CD8(+) T cell responses during tuberculosis by focusing on cytokines known to affect disease outcome: IL-12, type I IFN, and IL-27. Using mixed bone marrow chimeras, we compared wild-type and cytokine receptor knockout CD8(+) T cells within the same mouse following aerosol infection with Mycobacterium tuberculosis. Four weeks postinfection, IL-12, type 1 IFN, and IL-27 were all required for efficient CD8(+) T cell expansion in the lungs. We next determined if these cytokines directly promote CD8(+) T cell priming or are required only for expansion in the lungs. Using retrogenic CD8(+) T cells specific for the M. tuberculosis Ag TB10.4 (EsxH), we observed that IL-12 is the dominant cytokine driving both CD8(+) T cell priming in the lymph node and expansion in the lungs; however, type I IFN and IL-27 have nonredundant roles supporting pulmonary CD8(+) T cell expansion. Thus, IL-12 is a major signal promoting priming in the lymph node, but a multitude of inflammatory signals converge in the lung to promote continued expansion. Furthermore, these cytokines regulate the differentiation and function of CD8(+) T cells during tuberculosis. These data demonstrate distinct and overlapping roles for each of the cytokines examined and underscore the complexity of CD8(+) T cell regulation during tuberculosis. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| Journal | The Journal of Immunology |
| Issue Number | 4 |
| Volume Number | 196 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2016-02-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cd8-positive T-lymphocytes Immunology Cytokines Lymphocyte Activation Tuberculosis, Pulmonary Animals Cell Differentiation Disease Models, Animal Flow Cytometry Mice Mice, Inbred C57bl Mice, Knockout Oligonucleotide Array Sequence Analysis Research Support, N.i.h., Extramural Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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