TIGIT⁺ iTregs elicited by human regulatory macrophages control T cell immunity.

ABSTRACT: Human regulatory macrophages (Mreg) have shown early clinical promise as a cell-based adjunct immunosuppressive therapy in solid organ transplantation. It is hypothesised that recipient CD4⁺ T cell responses are actively regulated through direct allorecognition of donor-derived Mregs. Here we show that human Mregs convert allogeneic CD4⁺ T cells to IL-10-producing, TIGIT⁺ FoxP3⁺-induced regulatory T cells that non-specifically suppress bystander T cells and inhibit dendritic cell maturation. Differentiation of Mreg-induced Tregs relies on multiple non-redundant mechanisms that are not exclusive to interaction of Mregs and T cells, including signals mediated by indoleamine 2,3-dioxygenase, TGF-β, retinoic acid, Notch and progestagen-associated end

SUBMITTER: Riquelme P 

PROVIDER: S-EPMC6054648 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature