Journal article
Two discreet subsets of CD8 T cells modulate PLP 91-110 induced experimental autoimmune encephalomyelitis in HLA-DR3 transgenic mice
Journal of Autoimmunity, Vol.38(4), pp.344-353
2012
DOI: 10.1016/j.jaut.2012.02.004
PMID: 22459490
Abstract
Previously we showed that transgenic mice expressing human HLA-DR3 gene are susceptible to PLP(91-110) induced experimental autoimmune encephalomyelitis (EAE) and can serve as an animal model of multiple sclerosis (MS). HLA-DR3 mice with EAE showed increased number of CD8 T cells indicating their important role in disease pathogenesis. The role of CD8 T cells in MS, an inflammatory demyelinating disease of CNS, has been enigmatic as it has been assigned both regulatory and pathogenic roles. Therefore, to evaluate the role of CD8 T cells, we generated CD8 deficient HLA-DR3 transgenic mice (DR3.CD8(-/-)). Immunization with PLP(91-110) led to more severe EAE in DR3.CD8(-/-) mice compared to HLA-DR3 mice indicating a regulatory role for CD8 T cells. Interestingly, DR3.CD8(-/-) mice with EAE showed decreased CNS pathology compared to DR3 mice thus suggesting a pathogenic role for CD8 T cells. We show that these two subsets of CD8 T cells can be differentiated based on the surface expression of CD122 (IL-2 Rβ chain). CD8 T cells expressing CD122 (CD8+CD122+) play a regulatory role while CD8+CD122- T cells act as a pathogenic subset. CD122 expressing CD8 T cells are the regulatory subset of CD8 T cells and regulate the encephalitogenic CD4 T cells through direct modulation of antigen presenting cells and/or through the release of immunoregulatory cytokines such as IL-10, IFNγ and TGFβ. We also showed that adoptive transfer of CD8CD122- T cells caused increased spinal cord demyelination indicating that these are pathogenic subset of CD8 T cells. Our study suggests that CD8+ T cells play both regulatory as well as pathogenic role in disease pathogenesis of EAE. A better understanding of these subsets could aid in designing novel therapy for MS patients.
Details
- Title: Subtitle
- Two discreet subsets of CD8 T cells modulate PLP 91-110 induced experimental autoimmune encephalomyelitis in HLA-DR3 transgenic mice
- Creators
- Ashutosh K MangalamDavid LuckeyMichele SmartLarry R PeaseMoses RodriguezChella S DavidShailendra Giri
- Resource Type
- Journal article
- Publication Details
- Journal of Autoimmunity, Vol.38(4), pp.344-353
- DOI
- 10.1016/j.jaut.2012.02.004
- PMID
- 22459490
- NLM abbreviation
- J Autoimmun
- ISSN
- 1095-9157
- eISSN
- 1095-9157
- Language
- English
- Date published
- 2012
- Academic Unit
- Pathology; Iowa Neuroscience Institute
- Record Identifier
- 9983905648902771
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