新型免疫抑制剂SYL934的抗皮肤移植排斥反应研究

Anti-rejection study in mice skin transplantation of a novel immunosuppressant SYL934

目的探讨新型免疫抑制剂SYL934对皮肤移植排斥反应的影响。方法采用体外HTRF-IP1(Homogeneous Time-Resolved Fluorescence-IP1)方法,检测SYL934的活性磷酸酯SYL934-P对鞘氨醇-1-磷酸1型受体(sphingosine-1-phosphate receptor 1,S1P1)及鞘氨醇-1-磷酸3型受体(sphingosine-1-phosphate receptor 3,S1P3)的激动活性,采用体内大鼠外周血淋巴细胞检测实验考察SYL934的体内免疫抑制作用,采用大鼠心率检测实验考察SYL934对心率的影响,通过小鼠异体皮肤移植实验考察SYL934对皮肤移植排斥反应的影响。结果 SYL934的活性磷酸酯SYL934-P能够在体外选择性激动S1P1而非S1P3,单次灌胃给予SD大鼠SYL934能够明显降低大鼠外周血淋巴细胞数量,发挥明显的免疫抑制效应,而不会影响大鼠心率。每天灌胃给予小鼠SYL934可以明显提高小鼠皮肤移植模型中移植皮片的存活率。结论 SYL934具有较好的体内外生物活性,具有开发成为抗皮肤移植排斥反应药物的应用前景。

Aim To determine the effect of SYL934 , a novel immunosuppressant, on skin allograft rejec-tion. Methods HTRF-IP1 assay was used to evaluate the agonistic activity of SYL934-P, the active form of SYL934 in vivo, on S1P1 and S1P3 in vitro. SD rat peripheral blood lymphocytes （ PBL ） test and heart rate test was used to assess the in vivo immunosuppres-sive effect and heart rate effect of SYL934 . Mice skin graft transplantation experiment was used to observe the effect of SYL934 on skin allograft refection. ResultsSYL934-P selectively activated S1 P1 but not S1 P3 in vitro. Single orally administration of SD rats with SYL934 decreased the PBL significantly and played an obviously immunosuppressant role, but did not affect the heart rate. Daily orally administration of mice with SYL934 significantly increased the survival rate of allografts of skin slice in mice. Conclusion SYL934 has great selectivity in vitro and good activity in vivo, which indicated it potential use as an anti-rejection drug in skin transplantation.