Deramoudt E X, Gilard C, Lepine N, Alonso J M, Romet-Lemonne J L
Fondation Nationale De Transfusion Sanguine, Les Ulis, France.
Clin Exp Immunol. 1992 Aug;89(2):310-4. doi: 10.1111/j.1365-2249.1992.tb06951.x.
The Fc receptor mediated antibody-dependent cell-mediated cytotoxicity (ADCC) and phagocytosis induced by bispecific antibody (BsAb) to the high-affinity Fc receptor for IgG (Fc gamma RI) and to human red blood group antigen RhD were studied in vitro, using human mononuclear leucocytes as effector cells. The results were compared with those obtained by using a human monoclonal IgG1 anti-RhD used alone and a reference human polyclonal anti-RhD antibody. The effect of non-specific human IgG on FcR-mediated functions by mononuclear leucocytes was checked. The results demonstrate that BsAb presents a high resistance of Fc-mediated function to blockade by non-specific human IgG compared with that of both polyclonal and monoclonal anti-RhD antibodies. These results further encourage possible clinical application of bispecific antibody in passive immunotherapy.
使用人单核白细胞作为效应细胞,在体外研究了双特异性抗体(BsAb)对IgG高亲和力Fc受体(FcγRI)和人红细胞血型抗原RhD介导的Fc受体依赖性抗体介导的细胞毒性(ADCC)和吞噬作用。将结果与单独使用人单克隆IgG1抗RhD和参考人多克隆抗RhD抗体获得的结果进行比较。检测了非特异性人IgG对单核白细胞FcR介导功能的影响。结果表明,与多克隆和单克隆抗RhD抗体相比,BsAb的Fc介导功能对非特异性人IgG的阻断具有高抗性。这些结果进一步推动了双特异性抗体在被动免疫治疗中可能的临床应用。