IL17A and graft versus host disease: Because Th1/Th-17 and INF-γ/IL-17 participate in GVHD-inflammation [21] and given the beneficial effect of hMSCs infusion at reducing the intensity of GVHD, we also investigated whether MSCs would influence Th1 and Th17 differentiation or INF-γ and IL-17 secretion.