旋毛虫部分抗原表位的识别与分析

[目的 ]筛选旋毛虫肌幼虫可溶性抗原中具有免疫显性的表位。 [方法 ]采用杂交瘤技术 ,获得 15株特异性单克隆抗体 ,随后用酶联免疫吸附试验 (ELISA)、免疫印迹法 (Westernblotting)和间接免疫荧光试验(IFA)对部分免疫显性抗原进行分析。 [结果 ]Westernblotting试验显示 ,6株单抗与旋毛虫肌幼虫可溶性抗原反应显示有特异条带 ,分子量为 40～ 70kDa ;而多抗血清则可识别 2 0～ 2 0 0kDa之间 10条条带。IFA可观察到 ,6株单抗中有 4株单抗的靶抗原定位在旋毛虫肌幼虫表皮层上 ,另 2株定位于杆状体 (stichosome)及表皮层。 [结论 ]识别与分析部分旋毛虫肌幼虫可溶性抗原中具有免疫显性的表位 ,为纯化旋毛虫的抗原及疫苗靶抗原的研制提供了有价值的实验依据。

LOCALIZATION AND CHARACTERIZATION OF PARTIAL IMMUNODOMINANT ANTIGEN EPITOPES OF TRICHINELLA SPIRALIS

OBJECTIVE: To screen and characterize immunodominant antigen epitopes on the soluble antigens of Trichinella spiralis (T.s.). METHODS: 15 monoclonal antibodies (McAbs) against T.s. muscle larva(ML) soluble antigens were obtained by using hybridoma technique. The reactivity of monoclonal and polyclonal antibodies were tested by ELISA, Western blotting and indirect immunofluorescence assay(IFA). RESULTS: The Western blotting result showed that of the 15 McAbs, 6 could bind to the T.s. ML antigens displaying molecular weights of 40-70 kDa. Polyclonal sera could react with more than 10 bands having molecular weights of 20-200 kDa. Among the 6 McAbs, 4 could recognize epitopes on the cuticle surface and the other two could recognize epitopes on both the cuticle surface and the stichosome. CONCLUSION: The antigen epitopes of T.s. recognized by 6 McAbs had been characterized.