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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Mattila, Joshua T. Flynn, JoAnne L. Diedrich, Collin R. |
| Description | Country affiliation: United States Author Affiliation: Diedrich CR ( Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.) |
| Abstract | HIV-infected individuals are significantly more susceptible to tuberculosis (TB) than uninfected individuals. Although it is established that HIV reduces Mycobacterium tuberculosis-specific T cell responses, the causes of this dysfunction are not known. We used the cynomolgus macaque model of TB to demonstrate that ex vivo SIV reduces the frequency of M. tuberculosis-specific TNF and IFN-γ-producing T cells within 24 h after infection. In vivo, T cell IFN-γ responses in granulomas from animals with SIV/M. tuberculosis coinfection were lower than SIV-negative animals with active TB. The SIV effects on the inhibition of T cell responses were primarily on APCs and not the T cells directly. Specifically, reductions in the frequency of TNF-producing M. tuberculosis-specific CD4 T cells were caused, at least in part, by SIV-induced production of monocyte derived IL-5. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1202043 |
| Journal | The Journal of Immunology |
| Issue Number | 12 |
| Volume Number | 190 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2013-06-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cd4-positive T-lymphocytes Immunology Interleukin-5 Metabolism Monocytes Simian Acquired Immunodeficiency Syndrome Complications Tuberculosis Tumor Necrosis Factor-alpha Biosynthesis Animals Cell Separation Flow Cytometry Macaca Fascicularis Mycobacterium Tuberculosis Reverse Transcriptase Polymerase Chain Reaction Research Support, N.i.h., Extramural Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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