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The role of donor hepatocytes and/or splenocytes pre-injection in reducing islet xenotransplantation rejection |
Tian-Hua Tang, Chun-Lin Li, Xin Li, Feng-Qin Jiang, Yu-Kun Zhang and Hai-Quan Ren |
From the Department of Hemato-oncology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Jinan 250062, China (Tang TH, Jiang FQ, Zhang YK and Ren HQ); and Shandong Chinese Traditional Medical University, Jinan 250014, China (Li CL and Li X)
Correspondence: Tian-Hua Tang, MD, Department of Hemato-oncology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Jinan 250062, China (Tel: 86-531-2919978; Fax: 86-531-2919978; Email: tangth 998@hotmail.com) |
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Abstract OBJECTIVE: To observe the effect of tail vein injection with donor hepatocyte and/or splenocyte on islets 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 with donor hepatocytes and/or splenocytes. Macrophage phagocytosis, NK killing activity, T lymphocyte transforming function of spleen cells, antibody forming function of B lymphocytes, and T lymphocyte subsets were taken to monitor transplantation rejection. The effects of this kind of transplantation were indicated as variation of blood glucose and survival days of recipients.
RESULTS: Streptozotocin (STZ) succeeded in inducing diabetes mellitus models of mice. Pre-injection of donor hepatocytes, and splenocytes or their mixture via tail vein was effective in preventing donor islets transplantation from rejection, which was demonstrated by the mentioned immunological marks. And each group 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 rejection than pre-injection of donor hepatocytes or splenocytes separately.
CONCLUSION: We propose that pre-injection of donor hepatocytes, splenocytes separately or their mixture before donor islets transplantation is a good way to prevent rejection.
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