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


CONCLUSIONS
We propose that pre-injection of donor hepatocytes, splenocytes separately or their mixture before donor islets transplantation is a good way to prevent rejection.
Department of Hemato-oncology, Institute of Basic Medicine, Shandong Academy of Medical Sciences, Jinan 250062, China. tangth998@hotmail.com
Tian-Hua
TH
Tang
Chun-Lin
CL
Li
Xin
X
Li
Feng-Qin
FQ
Jiang
Yu-Kun
YK
Zhang
Hai-Quan
HQ
Ren
D000818:Animals; D000906:Antibodies / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology; D001786:Blood Glucose; D003921:Diabetes Mellitus, Experimental / Q000601:surgery; D005260:Female; D006084:Graft Rejection / Q000276:immunology* / Q000473:pathology / Q000517:prevention & control*; D022781:Hepatocytes / Q000276:immunology / Q000637:transplantation*; D016381:Islets of Langerhans Transplantation; D007694:Killer Cells, Natural / Q000276:immunology; D008213:Lymphocyte Activation / Q000502:physiology; D008264:Macrophages / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D010587:Phagocytosis / Q000276:immunology; D013154:Spleen / Q000166:cytology* / Q000276:immunology; D013552:Swine; D013601:T-Lymphocytes / Q000276:immunology; D014183:Transplantation, Heterologous
D000906:Antibodies; D001786:Blood Glucose