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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zakhary, Nardine Garlick, David S. Garcia, Victoria Weissler, Katherine Leibow, Abigail Kropf, Elizabeth Bedoya, Felipe Cheng, Guang-Shing Aitken, Malinda Wherry, E. John Erikson, Jan Caton, Andrew J. |
| Description | Country affiliation: United States Author Affiliation: Bedoya F ( The Wistar Institute, Philadelphia, PA 19104, USA.) |
| Abstract | We examined the formation, participation, and functional specialization of virus-reactive Foxp3(+) regulatory T cells (Tregs) in a mouse model of influenza virus infection. 'Natural' Tregs generated intrathymically, based on interactions with a self-peptide, proliferated in response to a homologous viral Ag in the lungs and, to a lesser extent, in the lung-draining mediastinal lymph nodes (medLNs) of virus-infected mice. In contrast, conventional CD4(+) T cells with identical TCR specificity underwent little or no conversion to become 'adaptive' Tregs. The virus-reactive Tregs in the medLNs and the lungs of infected mice upregulated a variety of molecules associated with Treg activation, as well as acquired expression of molecules (T-bet, Blimp-1, and IL-10) that confer functional specialization to Tregs. Notably, however, the phenotypes of the T-bet(+) Tregs obtained from these sites were distinct, because Tregs isolated from the lungs expressed significantly higher levels of T-bet, Blimp-1, and IL-10 than did Tregs from the medLNs. Adoptive transfer of Ag-reactive Tregs led to decreased proliferation of antiviral CD4(+) and CD8(+) effector T cells in the lungs of infected hosts, whereas depletion of Tregs had a reciprocal effect. These studies demonstrate that thymically generated Tregs can become activated by a pathogen-derived peptide and acquire discrete T-bet(+) Treg phenotypes while participating in and modulating an antiviral immune response. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1203302 |
| 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 | Lymphocyte Activation Immunology Orthomyxoviridae Infections T-lymphocyte Subsets T-lymphocytes, Regulatory Adoptive Transfer Animals Antigens, Viral Cell Differentiation Flow Cytometry Forkhead Transcription Factors Mice Mice, Inbred Balb C Mice, Transgenic Orthomyxoviridae Phenotype Real-time Polymerase Chain Reaction Reverse Transcriptase Polymerase Chain Reaction Cytology Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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