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抗卵巢癌单链免疫毒素的载体构建及高效表达
Vector construction and high level expression of single chain immunotoxin against ovarian carcinoma
【摘要】 目的 :构建抗卵巢癌单链抗体 183B2 ScFv与假单孢外毒素 (peudononasexotoxin ,PE38)的融合蛋白表达载体并制备抗人卵巢癌单链免疫毒素蛋白 183B2 ScFvPE38,为卵巢癌导向治疗打下基础。方法 :采用基因工程技术 ,经过 3次亚克隆 ,将编码单链抗体的基因及编码毒素的基因亚克隆至原核表达载体pET30a(+ )上 ,并在IPTG的诱导下进行表达。采用直接ELISA及细胞杀伤对抗体及毒素部分的活性进行检查。结果 :表达蛋白183B2 ScFvPE38具有较好的抗体活性及毒素活性。结论 :抗卵巢癌单链免疫毒素 183B2 ScFvPE38具有良好的免疫学活性及生物学活性 ,可能有良好的应用前景
【Abstract】 Objective: To construct an expression vector for co_expression of single chain Fv antibody (OC183B 2) and peudomonas exotoxin(PE38). Methods: Clone the genes of ScFv (OC183B 2) and PE38 into PET30a(+) and then express the immunotoxin after induced with IPTG. Results: Liable activity of antibody and toxic in were both observed in the fusion recombinant protein. Conclusion: The recombinant fusion protein 183B 2ScFvPE38 keeps the activity of both components and may be of great use in the future to deal with ovarian carcinoma.
【Key words】 Antibodies, neoplasm; Immunotoxins; Drug carriers/metab; Ovarian neoplasms; Recombinant fusion proteins/metab;
- 【文献出处】 北京医科大学学报 ,JOURNAL OF BEIJING MEDICAL UNIVERSITY , 编辑部邮箱 ,2000年04期
- 【分类号】R966
- 【被引频次】1
- 【下载频次】74