抗人DcR3单克隆抗体的研制及其鉴定

Preparation and identification of monoclonal antibodies against human DcR3

目的：制备抗人DcR3单克隆抗体（mAb），并鉴定其特异性。方法：纯化的His．DcR3融合蛋白免疫小鼠，应用淋巴细胞杂交瘤技术制备抗人DcR3 mAb并进行纯化，纯化后的抗体经Western blot和ELISA方法鉴定其特异性、Ig亚型和效价。结果：获得5株稳定分泌抗DcR3 mAb的杂交瘤细胞，均属IgG1亚型，其腹水抗体效价为1×10^-5～1×10^-7，Western blot显示5株细胞分泌的mAb均可识别DcR3蛋白，其中1株（181）可与SW480细胞成分反应。结论：成功建立稳定分泌抗人DcR3mAb的杂交瘤细胞株，其分泌的抗体特异性强、效价高，为研究DcR3在组织中的表达、分布及研制ELISA试剂盒奠定基础。

AIM： To prepare monoclonal antibodies （mAbs） against human DcR3 and identify their characterization. METHODS： BALB/c mice were immunized with purified His-DcR3 protein, and mAbs against DcR3 which prepared by hybridoma technique were purified and identified by their specificity, subtype, titers via ELISA and Western blot. RESULTS： Five hybridoma cell lines secreting mAbs against human DcR3 were obtained, which were determined as IgG1 subtype and ascites titers of five mAbs against DcR3 reached 1 × 10^-5 -1 × 10^-7. Five mAbs were proved to recognize His-DcR3 protein specifically, one of which （ 1B1 ） could recognize SW480 cell. CONCLUSION： mAbs against DcR3 with high titers and specificity have been prepared and purified successfully, which laid a foundation for the study of DcR3 expression, distribution in tissu and development of ELISA kit.