X Lu1, L Zhou, S Chen. 1. Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Abstract
BACKGROUND: Oral immune tolerance is a method for inducing donor-specific immunotolerance and prolonging graft survival. OBJECTIVES: We studied the effect of feeding donor spleen cells in combination with cyclosporine (CsA) on skin allograft survival in mice. METHODS: Tail skins from BALB/c (H-2d) female mice were transplanted onto C57BL/6 (H-2b) female mice. The animals were divided into four groups, each with eight mice: group I, untreated controls; group II, treated with spleen cells; group III, treated with CsA; and group IV, treated with spleen cells and CsA. All grafts were inspected daily. Rejection was diagnosed when the graft loss was >80% to 90%. The immune responses of C57BL/6 toward donor mice were examined by delayed-type hypersensitivity (DTH). RESULTS: Survival times of allogeneic skin grafts in groups I, II, III, and IV were 9.9 +/- 0.6, 13.1 +/- 0.6, 14.7 +/- 0.9, and 20.0 +/- 0.7 days, respectively. When compared with group I, the survival times of groups II, III, and IV were prolonged significantly (P < .01). The survival time for group IV was prolonged significantly compared with groups II and III (P < .01). The DTH responses of group IV were decreased significantly in contrast to groups II and III (P < .01). CONCLUSIONS: Feeding donor spleen cells prolonged the survival of skin allografts in mice; combination with CsA led to further prolongation of skin allograft survival.
BACKGROUND: Oral immune tolerance is a method for inducing donor-specific immunotolerance and prolonging graft survival. OBJECTIVES: We studied the effect of feeding donor spleen cells in combination with cyclosporine (CsA) on skin allograft survival in mice. METHODS: Tail skins from BALB/c (H-2d) female mice were transplanted onto C57BL/6 (H-2b) female mice. The animals were divided into four groups, each with eight mice: group I, untreated controls; group II, treated with spleen cells; group III, treated with CsA; and group IV, treated with spleen cells and CsA. All grafts were inspected daily. Rejection was diagnosed when the graft loss was >80% to 90%. The immune responses of C57BL/6 toward donormice were examined by delayed-type hypersensitivity (DTH). RESULTS: Survival times of allogeneic skin grafts in groups I, II, III, and IV were 9.9 +/- 0.6, 13.1 +/- 0.6, 14.7 +/- 0.9, and 20.0 +/- 0.7 days, respectively. When compared with group I, the survival times of groups II, III, and IV were prolonged significantly (P < .01). The survival time for group IV was prolonged significantly compared with groups II and III (P < .01). The DTH responses of group IV were decreased significantly in contrast to groups II and III (P < .01). CONCLUSIONS: Feeding donor spleen cells prolonged the survival of skin allografts in mice; combination with CsA led to further prolongation of skin allograft survival.