Synthesis and biological activities of a pH-dependently activated water-soluble prodrug of a novel hexacyclic camptothecin analog
作者:Jun Ohwada、Sawako Ozawa、Masami Kohchi、Hiroshi Fukuda、Chikako Murasaki、Hitomi Suda、Takeshi Murata、Satoshi Niizuma、Masao Tsukazaki、Kazutomo Ori、Kiyoshi Yoshinari、Yoshiko Itezono、Mika Endo、Masako Ura、Hiromi Tanimura、Yoko Miyazaki、Akira Kawashima、Shunsuke Nagao、Eitarou Namba、Koutarou Ogawa、Kazuko Kobayashi、Hisafumi Okabe、Isao Umeda、Nobuo Shimma
DOI:10.1016/j.bmcl.2009.03.123
日期:2009.5
CH0793076 (1) is a novel hexacyclic camptothecin analog showing potent antitumor activity in various human caner xenograft models. To improve the water solubility of 1, water-soluble prodrugs were designed to generate an active drug 1 nonenzymatically, thus expected to show less interpatient PK variability than CPT-11. Among the prodrugs synthesized, 4c (TP300, hydrochloride) having a glycylsarcosyl
CH0793076(1)是一种新颖的六环喜树碱类似物,其在各种人类癌异种移植模型中显示出有效的抗肿瘤活性。为了提高1的水溶性,设计了水溶性前药以非酶促方式生成活性药物1,因此预期其患者间PK变异性低于CPT-11。在合成的前药中,在C-20位置1处有一个糖基肌醇酯的4c(TP300,盐酸盐)具有很高的水溶性(> 10 mg / ml),在pH值4以下稳定,并且在体外生理pH值下迅速生成1。快速(约<1分钟)生成1TP300与血浆(小鼠,大鼠,狗和猴子)孵育后的结果也得到了证实。在各种人类癌症异种移植模型中,TP300显示出比CPT-11更宽的抗肿瘤谱和更强的抗肿瘤活性。