The role of donor hepatocytes and/or splenocytes pre-injection in reducing islet xenotransplantation rejection

摘要

OBJECTIVE: To observe the effect of tail vein injection with donor hepatocyte and/or splenocyte onislets xenotransplantation rejection.METHODS: New-born male pigs and BALB/C mice were selected as donors and recipients respectively.Islets xenotransplantation was performed in recipients just after the third time of tail vein injection withdonor hepatocytes and/or splenocytes. Macrophage phagocytosis, NK killing activity, T lymphocytetransforming function of spleen cells, antibody forming function of B lymphocytes, and T lymphocytesubsets were taken to monitor transplantation rejection. The effects of this kind of transplantation wereindicated as variation of blood glucose and survival days of recipients.RESULTS: Streptozotocin (STZ) succeeded in inducing diabetes mellitus models of mice. Pre-injectionof donor hepatocytes, and splenocytes or their mixture via tail vein was effective in preventing donor isletstransplantation from rejection, which was demonstrated by the mentioned immunological marks. And eachgroup of transplantation could decrease the blood glucose of recipients and prolong the survival days.Pre-injection of mixture of donor hepatocytes and splenocytes was more effective in preventing rejectionthan pre-injection of donor hepatocytes or splenocytes separately.CONCLUSION: We propose that pre-injection of donor hepatocytes, splenocytes separately or theirmixture before donor islets transplantation is a good way to prevent rejection.