阴道毛滴虫单克隆抗体的制备和鉴定

PREPARATION AND IDENTIFICATION OF ANTI-TRICHOMON AS VAGINALIS MONOCLONAL ANTIBODIES

用阴道毛滴虫滋养体免疫BALB/c小鼠,取脾细胞与NS_1鼠骨髓瘤细胞融合,选择4株(2A2,2A4,2A12,2H9)杂交瘤细胞,证明能分泌效价高、特异性强的单克隆抗体(McAb)。亚类鉴定为IgG1(2A2,2A4),IgG2b(2A12),IgG3(2H9)。2H9株和其他3株McAb分别能抗阴道毛滴虫细胞核和细胞膜。除2H9株外均可凝集或杀伤虫体,但2A2、2A4和2A12株介导的细胞毒性分别是不依赖和依赖补体的。这4株McAb与杜氏利什曼原虫前鞭毛体、枯氏锥虫锥鞭毛体和蓝氏贾第鞭毛虫滋养体无交叉反应。

Hybridomas producing monoclonal antibodies (McAb) directed against Trichomonas vaginalis have been produced by fusing NSI myeloma cells with spleen cells of BALB/c mice immunized with Trichomonas vaginalis.IFA technique was used to test the binding activity of four McAbs produced.The McAb belonged to the IgG subtypes IgGl(2A2,2A4 McAb),IgG3 (2H9 McAb) and IgG 2b (2A12 McAb).Three McAbs,designated 2A2,2A4,2A12,reacted with a surface membrane component of live Trichomonas vaginalis.One (2A12) of them produced com-plement-dependent cytolysis of the parasites.Others (2A2.2A4) produced complement-independent cytotoxicity of the parasites.2H9 McAb which reacted with the nucleus of the organisms did not agglutinate the parasites.The four McAbs which did not have cross reaction with some protozoa of Zoomastigophorea species were specific antibodies against Trichomonas vaginalis.(Figs.1-3)