| First Author | Chen XP | Year | 2005 |
| Journal | Eur J Immunol | Volume | 35 |
| Issue | 5 | Pages | 1408-17 |
| PubMed ID | 15832295 | Mgi Jnum | J:97797 |
| Mgi Id | MGI:3576422 | Doi | 10.1002/eji.200425483 |
| Citation | Chen XP, et al. (2005) Impaired IL-4 production by CD8(+) T cells in NOD mice is related to a defect of c-Maf binding to the IL-4 promoter. Eur J Immunol 35(5):1408-17 |
| abstractText | CD8(+) T cells play an important role in the induction of the autoimmune response in non-obese diabetic (NOD) mice. Here we describe abnormalities in the control of cytokine production by NOD CD8(+) T cells. NOD CD8(+) T cells had an increased propensity to produce IFN-gamma upon TCR activation, in both adult and 2-week-old mice. NOD CD8(+) T cells had a reduced capacity to produce IL-4 in type 2 conditions compared to CD8(+) T cells from the diabetes-resistant strains BALB/c and C57BL/6. Both GATA-3 and c-Maf, two positive transactivators for IL-4 gene expression, were expressed in type 2 conditions at comparable levels in NOD CD8(+) T cells. The GATA-3 was functional since normal levels of IL-5 were produced and the IL-4 promoter was hyperacetylated in NOD CD8(+) T cells. In contrast, c-Maf failed to bind to its responsive element as determined by chromatin immunoprecipitation (ChIP) assay. These results suggest that NOD CD8(+) T cells possess an increased propensity to produce IFN-gamma and impaired c-Maf-dependent DNA binding activities in vivo that lead to reduced IL-4 production following TCR activation. These defects may facilitate the development of the autoimmune response by inducing an overall type 1-biased immune response in NOD mice. |
