Transplant long-surviving induced by CD40-CD40 ligand costimulation blockade is dependent on IFN-γ through its effect on CD4(+)CD25(+) regulatory T cells. - Jiang XF; Zhu L; Cui ZM; Guo DW; Sun WY; Lin L; Tang YF; Wang XF; Liang J (Transplant immunology, 2011)