供者肝脾细胞输注与改良的微囊法联合应用延长异种胰岛移植的存活

Effect of combined application of improved microencapsulation and intravenous injection of donor liver cells and spleen cells on pancreatic islet xenografts

目的探讨改良的微囊胰岛和肝脾细胞输注联合应用,对异种胰岛细胞移植的影响。方法以新生杜洛克小猪为供者,糖尿病SD大鼠为受者。将受者随机分为6组:第1组为肝脾细胞输注移植组;第2组为微囊胰岛细胞移植组;第3组为联合应用移植组;第4组为裸胰岛细胞移植组;第5组为空囊移植对照组;第6组为生理盐水对照组。各组经尾静脉输注肝脾细胞或生理盐水,再将相应的移植物植入大鼠腹腔。术后观测血糖、血清C肽变化、移植胰岛的功能存活期及糖尿病大鼠的生存期。结果第3组控制血糖水平和血清C肽释放量比第1、2组更为平稳而持久,并明显延长移植胰岛的功能存活期和糖尿病大鼠的生存期(P<0.01)。结论异种胰岛细胞移植中,肝脾细胞输注与静电改良微囊法联合应用可诱导免疫耐受,能有效地延长移植胰岛的功能存活期。

Objective To explore the effect of combined application of improved microencapsulation and intravenous injection of donor liver cells and spleen cells on pancreatic islet xenografts. Methods New born male pigs and SD rats were selected as donors and recipients respectively, and pig pancreatic islet cells were microencapsulated by static electricity improvement microencapsulation. Islet transplantation was performed after injection of donor liver cells and spleen cells via tail vein. The changes in blood glucose and serum C-peptide, the function-possessed days of islet xenografts and diabetes rats living period were observed. Results In combined application group, the function-possessed days of islet xenografts and diabetes rats living period were significantly prolonged （P〈0. 01 ）, and the changes in blood glucose and serum C-peptide were more balanced. Conclusion Combined use of improved microencapsulation and intravenous injection of liver cells and spleen cells all can induce the immune tolerance and effectively prolong the function-possessed days of islet xenografts.