Abstract

CD4+ Foxp3+ regulatory T cell (Treg) therapy in organ transplantation is being examined in phase I/II studies. However, Treg fate after infusion remains unknown, and concerns persist that they may convert into effector cells. We recently described a novel method for generating alloantigen-reactive Tregs using the phosphodiesterase 3b (PDE3b) inhibitor cilostamide (cilos Tregs). We hypothesized that cilos Tregs would exhibit superior phenotypic and functional stability compared with transforming growth factor β-generated Tregs (TGFβ Tregs).

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