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中国临床药理学与治疗学 ›› 2009, Vol. 14 ›› Issue (11): 1234-1238.

• 基础研究 • 上一篇    下一篇

蓖麻毒蛋白A 链与抗表皮生长因子受体单克隆抗体偶联物的抗肿瘤效应

申苏建, 吴金明, 金思思, 黄智铭, 吴建胜   

  1. 温州医学院附属第一医院消化内科, 温州325000, 浙江
  • 收稿日期:2009-08-20 修回日期:2009-09-30 发布日期:2020-10-26
  • 通讯作者: 吴金明,男, 博士, 研究方向:肝脏疾病。E-mail:phdwu0003@yahoo.com.cn
  • 作者简介:申苏建, 男, 硕士生, 研究方向:肝脏疾病。Tel:13566277635 E-mail:sujian23@sohu.com

Antitumoral effect of the immunoconjugate composed of ricin A-chain and EGFR mab

SHEN Su-jian, WU Jin-ming, JIN Si-si, HUANG Zhi-ming, WU Jian-sheng   

  1. Department of Gastroenterology, the First Affiliated Hospital of Wenzhou Medical College, Wenzhou 325000, Zhejiang, China
  • Received:2009-08-20 Revised:2009-09-30 Published:2020-10-26

摘要: 目的:将蓖麻毒蛋白(ricin) A 链(RTA) 与表皮生长因子受体(epidermal growth factor receptor,EGFR) mab 偶联形成免疫毒素(immunotoxin, IT),并评价该偶联物的体外抗肿瘤作用。方法:从蓖麻籽中提纯RTA, 采用N-琥珀酰胺-3-(2-吡啶二硫) 丙酸酯[N-succinimidyl-3-(2-pyridyldithio) -propionate,SPDP] 为偶联剂制备IT EGFR mab-RTA, 以SDS-PAGE 检测RTA 的提取及IT 的偶联, 以DAB显色法检测IT 对人肝癌HepG2 细胞的结合能力,以间接ELISA 方法测定IT 的免疫反应性, 以CCK-8 法测定IT 的体外抗肿瘤作用。结果:RTA从蓖麻籽中提取后, 与EGFR mab 成功偶联。IT基本保留了EGFR mab 对HepG2 细胞的结合能力和免疫反应性, 及对HepG2 细胞和LO2 细胞表现了不同的体外细胞毒作用。结论:EGFR mab-RTA具有特异性抑制肝癌细胞增殖的作用, 有望成为新型的抗肝癌药物。

关键词: 蓖麻毒蛋白A 链, 单克隆抗体, 免疫毒素

Abstract: AIM: To research the antitumoral effect in vitro of the immunotoxin composed by RTA and EGFR mab. METHODS: Taking SPDP as the coupling agent, RTA, which was purified from castor bean, was linked with EGFR mab.After further purification, the purification of RTA and the construction of the immunotoxin were detected by SDS-PAGE.The combining capacity to HepG2 cells was detected by DAB chromogenic method.The immunoreactivity was detected by indirect ELISA.The cytotoxicity in vitro was detected by CCK-8 method. RESULTS: The immunotoxin was constructed successfully.Immunotoxin retained the combining capacity of EGFR mab to HepG2 cells and a major part of the immunoreactivity.The immunotoxin displayed a different cytotoxicity between HepG2 cells and LO2 cells. CONCLUSION: Immunotoxin plays a specific role in suppressing the multiplication of the hepatoma carcinoma cell and has a good prospect in liver cancer treatment.

Key words: ricin A-chain, monoclonal antibody, immunotoxin

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