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目的 制备并鉴定抗肝再生磷酸酶-3(Phosphatase of Regenerating Liver-3,PRL-3)单克隆抗体,为临床检测和以PRL-3为靶点的肿瘤治疗提供可能.方法 运用杂交瘤融合技术制备PRL-3单克隆抗体,通过Western blot检测和免疫沉淀鉴定其与原核及真核PRL-3蛋白的反应性;重组并诱导表达PRL-3的6个截短体,Western blot分析单抗结合的大致抗原表位.结果 共得到9株单抗,3株与PRL-1、PRL-2和PRL-3均反应,6株(9D8、9E2、9F4、11B2、4D3和4D10)只与PRL-3反应,其中4株特异性单抗可以与哺乳动物细胞表达的PRL-3反应;单抗9D8、9E2、9F4和11B2可以和PRL-3羧基末端(162-173位氨基酸)的短肽结合;4D3和4D10与中间部分(69～95位氨基酸)的短肽结合.结论 抗体9D8、9E2、9F4、11B2、4D3和4D10特异性强、亲和力高,为临床检测提供了可靠工具,并为进一步的功能研究奠定了基础.“,”Objective To prepare and identify specific Phosphatase of Regenerating Liver-3 (PRL-3) mon-oclonal antibodies for clinical detection and for further therapeutic intervention. Methods Hybridoma technology was used to prepare PRL-3 monocloual antibodies (MAbs), and the specificities of MAbs a-gainst PRL-3 were evaluated by Western blot and immunoprecipation. Six truncations of PRL-3 were cloned and expressed in prokaryotic cell for identifying the approximate epitope. The binding abilities of MAbs were analyzed by Western blot. Results Among 9 hybridoma clones obtained, 6 (9D8, 9E2,9F4, 11B2, 4D3 and 4D10)could specifically bind to PRL-3, and 4 could react to PRL-3 protein in eu-karyotic cells. Clone 9138,9E2,9F4 and 11B2. cloud bind to the COOH-terrninal of PRL-3, and clone 4D3 and 4D10 cloud bind to 69～95 amino acids. Conclusion MAbs 9D8, 9E2, 9F4, 11B2, 4D3 and 4D10 can react only to PRL-3, which provides potential applications in clinical diagnosis and in future study.