Objective To investigate the efficacy of anti-common gamma chain (Anti-γc) monoclonal antibodies (mAbs) in the treatment of graft vs host disease (GVHD) by blockage of T cells growth factor receptor pathway. Methods The inhibitory efficacy of Anti-γc mAbs was measured through mixed lymphocytes culture in vitro. 5×107 C57BL/6 splenocytes were transfused into F1 (Balb/C×C57BL/6, H-2b/d) via tail vein to develop GVHR model. And injection of anti-γc mAbs (0.5 mg) were given at 1st, 3 rd and 7 th day introperito...