| First Author | Mori T | Year | 2014 |
| Journal | J Immunol | Volume | 193 |
| Issue | 4 | Pages | 1728-36 |
| PubMed ID | 25024389 | Mgi Jnum | J:244053 |
| Mgi Id | MGI:5912832 | Doi | 10.4049/jimmunol.1303243 |
| Citation | Mori T, et al. (2014) Lnk/Sh2b3 controls the production and function of dendritic cells and regulates the induction of IFN-gamma-producing T cells. J Immunol 193(4):1728-36 |
| abstractText | Dendritic cells (DCs) are proficient APCs that play crucial roles in the immune responses to various Ags and pathogens and polarize Th cell immune responses. Lnk/SH2B adaptor protein 3 (Sh2b3) is an intracellular adaptor protein that regulates B lymphopoiesis, megakaryopoiesis, and expansion of hematopoietic stem cells by constraining cytokine signals. Recent genome-wide association studies have revealed a link between polymorphism in this adaptor protein and autoimmune diseases, including type 1 diabetes and celiac disease. We found that Lnk/Sh2b3 was also expressed in DCs and investigated its role in the production and function of DC lineage cells. In Lnk(-/-) mice, DC numbers were increased in the spleen and lymph nodes, and growth responses of bone marrow-derived DCs to GM-CSF were augmented. Mature DCs from Lnk(-/-) mice were hypersensitive and showed enhanced responses to IL-15 and GM-CSF. Compared to normal DCs, Lnk(-/-) DCs had enhanced abilities to support the differentiation of IFN-gamma-producing Th1 cells from naive CD4(+) T cells. This was due to their elevated expression of IL-12Rbeta1 and increased production of IFN-gamma. Lnk(-/-) DCs supported the appearance of IFN-gamma-producing T cells even under conditions in which normal DCs supported induction of regulatory T cells. These results indicated that Lnk/Sh2b3 plays a regulatory role in the expansion of DCs and might influence inflammatory immune responses in peripheral lymphoid tissues. |
