目的:用重组的蓖麻毒素A链与抗CD5的单克隆抗体DS27交联为免疫毒素rTRA:DS27,与完整蓖麻毒素制备的ricin:DS27进行对比研究.方法:分析它们对靶细胞的特异性杀伤,对骨髓造血细胞增殖的影响,内化情况,以及NH_4cl对rRTA:DS27毒性的增强作用.结果:rRTA:DS27具有更好的导向特异性,对骨髓造血功能影响较小,NH_4cl能明显增强rRTA:DS27的毒性.结论:rTRA:DS27免疫毒素具有更多的优点.

Objective: Immunotoxin rRTA:DS27, which was prepared by conjugating DS27 with recombinanl ricin a chain, was compared with ricin:DS27 as immunotoxins. Methods: System analysis were performed regard to their cell-specific cytotoxicity, inhibition on the proliferation of hemoapeutic potential cells, immunogold-labelled intracellular routing and effect of NH_(4)Cl on the cytotoxicity. Results: Results showed that rRTA: DS27 got a more specific cytotoxicity and a weaker inhibition on the proliferation of hemoapeutic potential cells than ricin:DS27, NH_(4)Cl could obsolutelyy enhence the cytotoxicity of rRTA:DS27. Conclusion: rRTA:DS27 had more advantages than ricin: DS27 as immunotoxins.

R346

国家“863”生物技术项目(102-09-01-03)资助