Th1 not Th17 cells drive spontaneous MS-like disease despite a functional regulatory T cell response
| Autor: | Rebecca J. Ingram, Stephanie Ascough, Daniel E. Lowther, Deborah L. W. Chong, Daniel M. Altmann, Anna Ettorre, Rosemary J. Boyton |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
CD4-Positive T-Lymphocytes
Central Nervous System Multiple Sclerosis Regulatory T cell medicine.medical_treatment T cell Receptors Antigen T-Cell Fluorescent Antibody Technique Mice Transgenic CD8-Positive T-Lymphocytes Biology Real-Time Polymerase Chain Reaction T-Lymphocytes Regulatory Pathology and Forensic Medicine Interferon-gamma Mice Cellular and Molecular Neuroscience medicine Animals Humans Interferon gamma Cell Proliferation HLA-DR Serological Subtypes Multiple sclerosis Interleukin-17 Experimental autoimmune encephalomyelitis Brain Th1 Cells medicine.disease medicine.anatomical_structure Cytokine Immunology Disease Progression Th17 Cells Neurology (clinical) Interleukin 17 CD8 medicine.drug |
| Zdroj: | Acta Neuropathologica. 126:501-515 |
| ISSN: | 1432-0533 0001-6322 |
| Popis: | Multiple sclerosis is considered a disease of complex autoimmune etiology, yet there remains a lack of consensus as to specific immune effector mechanisms. Recent analyses of experimental autoimmune encephalomyelitis, the common mouse model of multiple sclerosis, have investigated the relative contribution of Th1 and Th17 CD4 T cell subsets to initial autoimmune central nervous system (CNS) damage. However, inherent in these studies are biases influenced by the adjuvant and toxin needed to break self-tolerance. We investigated spontaneous CNS disease in a clinically relevant, humanized, T cell receptor transgenic mouse model. Mice develop spontaneous, ascending paralysis, allowing unbiased characterization of T cell immunity in an HLA-DR15-restricted T cell repertoire. Analysis of naturally progressing disease shows that IFNγ(+) cells dominate disease initiation with IL-17(+) cells apparent in affected tissue only once disease is established. Tregs accumulate in the CNS but are ultimately ineffective at halting disease progression. However, ablation of Tregs causes profound acceleration of disease, with uncontrolled infiltration of lymphocytes into the CNS. This synchronous, severe disease allows characterization of the responses that are deregulated in exacerbated disease: the correlation is with increased CNS CD4 and CD8 IFNγ responses. Recovery of the ablated Treg population halts ongoing disease progression and Tregs extracted from the central nervous system at peak disease are functionally competent to regulate myelin specific T cell responses. Thus, in a clinically relevant mouse model of MS, initial disease is IFNγ driven and the enhanced central nervous system responses unleashed through Treg ablation comprise IFNγ cytokine production by CD4 and CD8 cells, but not IL-17 responses. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink