| First Author | Hongo D | Year | 2012 |
| Journal | Blood | Volume | 119 |
| Issue | 6 | Pages | 1581-9 |
| PubMed ID | 22174155 | Mgi Jnum | J:181731 |
| Mgi Id | MGI:5313783 | Doi | 10.1182/blood-2011-08-371948 |
| Citation | Hongo D, et al. (2012) Interactions between NKT cells and Tregs are required for tolerance to combined bone marrow and organ transplants. Blood 119(6):1581-9 |
| abstractText | We used a model of combined bone marrow and heart transplantation, in which tolerance and stable chimerism is induced after conditioning with fractionated irradiation of the lymphoid tissues and anti-T-cell antibodies. Graft acceptance and chimerism required host CD4(+)CD25(+) Treg production of IL-10 that was in-turn enhanced by host invariant natural killer (NK) T-cell production of IL-4. Up-regulation of PD-1 on host Tregs, CD4(+)CD25(-) conventional T (Tcon) cells, and CD8(+) T cells was also enhanced by NKT cell production of IL-4. Up-regulated PD-1 expression on Tregs was linked to IL-10 secretion, on CD8(+) T cells was linked to Tim-3 expression, and on CD4(+) Tcon cells was associated with reduced IFNgamma secretion. Changes in the expression of PD-1 were induced by the conditioning regimen, and declined after bone marrow transplantation. In conclusion, NKT cells in this model promoted changes in expression of negative costimulatory receptors and anti-inflammatory cytokines by Tregs and other T-cell subsets in an IL-4-dependent manner that resulted in tolerance to the bone marrow and organ grafts. |
