In:
Blood, American Society of Hematology, Vol. 119, No. 24 ( 2012-06-14), p. 5898-5908
Kurzfassung:
FoxP3+ confers suppressive properties and is confined to regulatory T cells (Treg) that potently inhibit autoreactive immune responses. In the transplant setting, natural CD4+ Treg are critical in controlling alloreactivity and the establishment of tolerance. We now identify an important CD8+ population of FoxP3+ Treg that convert from CD8+ conventional donor T cells after allogeneic but not syngeneic bone marrow transplantation. These CD8+ Treg undergo conversion in the mesenteric lymph nodes under the influence of recipient dendritic cells and TGF-β. Importantly, this population is as important for protection from GVHD as the well-studied natural CD4+FoxP3+ population and is more potent in exerting class I–restricted and antigen-specific suppression in vitro and in vivo. Critically, CD8+FoxP3+ Treg are exquisitely sensitive to inhibition by cyclosporine but can be massively and specifically expanded in vivo to prevent GVHD by coadministering rapamycin and IL-2 antibody complexes. CD8+FoxP3+ Treg thus represent a new regulatory population with considerable potential to preferentially subvert MHC class I–restricted T-cell responses after bone marrow transplantation.
Materialart:
Online-Ressource
ISSN:
0006-4971
,
1528-0020
DOI:
10.1182/blood-2011-12-396119
Sprache:
Englisch
Verlag:
American Society of Hematology
Publikationsdatum:
2012
ZDB Id:
1468538-3
ZDB Id:
80069-7
