Dendritic cells with TGF-beta1 differentiate naive CD4+CD25- T cells into islet-protective Foxp3+ regulatory T cells. - Luo,X.; Tarbell,KV.; Yang,H.; Pothoven,K.; Bailey,SL.; Ding,R.; Steinman,RM.; Suthanthiran,M. (Proc Natl Acad Sci USA, 2007)