Synthesis and Antitumor Activity of Duocarmycin Derivatives.
作者:Satoru NAGAMURA、Yutaka KANDA、Eiji KOBAYASHI、Katsushige GOMI、Hiromitsu SAITO
DOI:10.1248/cpb.43.1530
日期:——
A series of duocarmycin B2 dirivatives, modified at the phenolic hydroxyl group to ester, carbonate and carbamate, was synthesized. Antitumor activity of these analogs was preliminarily evaluated by assays of growth inhibition of HeLa S3 cells (in vitro) and antitumor activity against murine sarcoma 180 (in vivo). The stability of the compounds under aqueous conditions was examined, and we found a correlation between antitumor activity in vivo and stability in aqueous solution, that is, the more stable derivatives exhibited higher antitumor activity. Among these derivatives, the N, N-dialkylcarbamoyl analogs exhibited both improved antitumor activity and higher stability compared with duocarmycin B2. These analogs were subjected to further biological evaluation and they expressed broad-spectrum activity toward murine solid tumors M5076, Colon 26 and Colon 38, and human xenografted carcinoma MX-1.
合成了一系列在酚羟基位置改造为酯、碳酸酯和氨基甲酸酯的双卡霉素B2衍生物。通过对HeLa S3细胞的生长抑制实验(体外)和小鼠肉瘤180的抗肿瘤活性(体内)对这些类似物的抗肿瘤活性进行了初步评估。研究了化合物在水相条件下的稳定性,并发现体内抗肿瘤活性与水溶液中的稳定性之间存在相关性,即稳定性越高的衍生物表现出更强的抗肿瘤活性。在这些衍生物中,N,N-二烷基氨基甲酰基类似物相较于双卡霉素B2展现了更强的抗肿瘤活性和更高的稳定性。对这些类似物进行了进一步的生物评估,结果表明它们对小鼠实性肿瘤M5076、结肠26和结肠38以及人类异种移植癌MX-1均表现出广谱活性。