Synthesis of Pironetin and Related Analogs. Studies on Structure-Activity Relationships as Tubulin Assembly Inhibitors.
作者:HIROYUKI WATANABE、HIDENORI WATANABE、TAKEO USUI、MASUO KONDOH、HIROYUKI OSADA、TAKESHI KITAHARA
DOI:10.7164/antibiotics.53.540
日期:——
Pironetin (1) and demethylpironetin (2) are potent inhibitors of tubulin assembly. They arrested the mammalian cell cycle in M-phase and showed antitumor activity against a murine tumor cell line, P388 leukemia, transplanted in mice. To investigate the chemical and biological properties of 1, we synthesized several derivatives and investigated the structure-activity relationships. All synthesized derivatives decreased biological activities, such as inhibition of cell cycle progression, and disruption of the microtubule network in situ. The most drastic decrease was observed in 6, 8 and 10. These results suggested that α, β-unsaturated lactone, chirality at the 7-position bearing a hydroxyl group and the terminal portion of the alkyl chain are important for microtubule inhibitory activity of pironetins.
Pironetin (1) 和 demethylpironetin (2) 是一种有效的微管蛋白装配抑制剂。它们能使哺乳动物细胞周期停滞在 M 期,并对移植到小鼠体内的小鼠肿瘤细胞系 P388 白血病具有抗肿瘤活性。为了研究 1 的化学和生物特性,我们合成了几种衍生物并研究了其结构-活性关系。所有合成的衍生物都降低了生物活性,如抑制细胞周期进展和破坏原位微管网络。其中,6、8 和 10 的生物活性下降最为明显。这些结果表明,α、β-不饱和内酯、带有羟基的 7 位手性和烷基链的末端部分对 pironetins 的微管抑制活性非常重要。