Synthesis of 2'-deoxyuridine and 5-fluoro-2'-deoxyuridine derivatives and evaluation in antibody targeting studies
作者:Thomas F. G. Henn、Martin C. Garnett、Siri Ram Chhabra、Barrie W. Bycroft、Robert W. Baldwin
DOI:10.1021/jm00063a007
日期:1993.5
Derivatives of 2'-deoxyuridine and of the anticancer agent 5-fluoro-2'-deoxyuridine (FdUR) were linked indirectly via a human serum albumin carrier (HSA) to the murine antiosteosarcoma monoclonal antibody 791T/36. Starting from the 2'-deoxyuridines 1a and 1b, the new nucleosides containing 5'-succinamic acid 7 and 5'-maleamic acid 8 spacers were synthesized from the key intermediate 5'-aminonucleoside
2'-脱氧尿苷和抗癌剂5-氟-2'-脱氧尿苷(FdUR)的衍生物通过人血清白蛋白载体(HSA)与鼠类抗骨肉瘤单克隆抗体791T / 36间接连接。从2'-脱氧尿苷1a和1b开始,从关键中间体5'-氨基核苷4合成了含有5'-琥珀酰胺酸7和5'-马来酰胺酸8间隔区的新核苷,从核呋喃呋喃糖醛酸10合成了核呋喃酰胺基苯甲酸13。这些核苷通过其间隔子功能与HSA连接。对于这些衍生物-HSA缀合物,获得了25-40的高摩尔取代率(MSR:药物的摩尔/ HSA的摩尔)。所有衍生物对抗原阳性成骨肉瘤791T和抗原阴性膀胱癌T24细胞系的细胞毒性均低于母体药物。任何针对791T细胞的衍生物均未达到IC50。然后将氟脱氧尿苷-HSA缀合物通过稳定的硫醚键进一步连接至小鼠单克隆抗体791T / 36。最佳的氟化5'-琥珀酸免疫偶联物对791T和T24细胞的IC50为1 microM,略好于氟脱氧尿苷。未缀合的衍