门静脉注射供体脾细胞联合应用环孢素A诱导免疫耐受的实验研究

目的:利用大鼠异位心脏移植模型,行移植时经门静脉注射供体脾细胞联合应用环孢素A(CsA)诱导免疫耐受的实验研究,并从细胞免疫角度探讨其诱导免疫耐受机制。方法:受体鼠移植术前经门静脉注射供体脾细胞联合短期应用环孢素A(CsA)。采用MTT法检测术后受体鼠脾淋巴细胞IL-2产生水平及NK细胞活性,采用ELISA检测受体鼠IFN-γ表达水平。结果:门静脉注射供体脾细胞联合应用CsA能显著延长大鼠心脏移植物的存活期,且明显抑制受体脾淋巴细胞IL-2,IFN-γ的表达及NK细胞活性。结论:门静脉注射供体脾细胞能有效地诱导免疫耐受,干扰IL-2-NK-IFN-γ免疫网络功能可能是门静脉注射供体脾细胞诱导免疫耐受的机制之一。

Investigation on immune tolerance induced by portal venous inoculation of donor spleen cells combined with CsA

With the hereotopic heart transplantation, immune tolerance induced by portal venous inoculation of donor spleen cells was studied.Methods:The recipient rats received donor spleen cells through portal vein combined with of cyclosporine A(CsA).The NK cell activity and IL-2, IFN-y expression of recipient spleen cells were detected. Results: Hie inoculation of donor spleen cells through the portal vein could significandy prolong survival time of heart allografts.IL- 2, IFN-y expression of recipient spleen lymphocytes and the recipient NK cell activity was also inhibitied.Conclusion:The inoculation of donor spleen cells through the portal vein could induce immune tolerance.The suppression of IL-2-NK-IFN-y immunologic net may be an important mechanism of portal vein tolerance.