摘要
抗癌抗生素C1027对癌细胞有强烈杀伤作用,比阿霉素强10000倍以上,C1027与癌细胞接触10min即显示对DNA合成的强烈抑制作用,C1027分子由发色团与蛋白质两部分构成;发色团是烯二炔新化合物,是C1027分子的主要活性部分.C1027分子可拆分与重建,重建的C1027同样有高度抗肿瘤活性.通过新的交联方法可制备C1027与单抗的强化偶联物.体外、体内试验表明.C1027单抗偶联物对肿瘤靶细胞有很强的特异性杀伤作用;对移植于探鼠的人体肝癌、胃癌有显著疗效,在可耐受剂量,肿瘤抑制率达85%(P<0.01).研究结果显示,C1027作为高效“弹头”药物,可用于研制新的小型化高效抗肿瘤导向药物.
C1027, an anticancer antibiotic, showed extremely potent cytotoxicity against cultured cancer cells, being over 10,000-fold more potent than adriamycin. C1027 acted rapidly; DNA synthesis of hepatoma cells was suppressed within 10 mintus of exposure. C1027 consists of two moieties, a new enediyne chromophore and an apoprotein; the chromophore serves as the active part of the molecule. C1027 molecule can be dissociated and reconstituted. The reconstituted C1027 was as potent as natural C1027. Through a newly developed method, enriched conjugation C1027 was conjugated to monoclonal antibodies. As determined by clonogenic assay, the conjugates displayed highly-potent, specific cytotoxicity to target cancer cells. The conjugates exerted marked therapeutic effects against hepatoma and gastric cancer xenografts in nude mice; at tolerable dose, tumor inhibition rate reached 85% (P<0.01). The results suggest that C1027, as a potent effector agent, can be used for making highly effective antitumor immunoconjugates of smaller molecular size.
出处
《中国肿瘤生物治疗杂志》
CAS
CSCD
1995年第2期94-98,共5页
Chinese Journal of Cancer Biotherapy
基金
国家863计划资助项目
