Antitumor agents. 100. Inhibition of human DNA topoisomerase II by cytotoxic ether and ester derivatives of podophyllotoxin and .alpha.-peltatin
摘要:
A principal mechanism of action of the clinical antitumor drugs etoposide (1) and teniposide (2) is the inhibition of catalytic activity of type II DNA topoisomerase and concurrent enzyme-mediated production of lethal DNA strand breaks. Substitution of the glycosidic moiety of 1 or 2 by ester and ethers, as well as the esterification and etherification of alpha-peltatin (4) including its glucosidic ethylidene and thenylidene cyclic acetals (25 and 26), has afforded compounds of much less activity than that of 1. The in vitro cytotoxicity (KB) appears to have no correlation with the inhibitory activity of the human DNA topoisomerase II.
THURSTON, LEE S.;IMAKURA, YASUHIRO;HARUNA, MITSUMASA;LI, DE-HUA;LIU, ZONG+, J. MED. CHEM., 32,(1989) N, C. 604-608
作者:THURSTON, LEE S.、IMAKURA, YASUHIRO、HARUNA, MITSUMASA、LI, DE-HUA、LIU, ZONG+
DOI:——
日期:——
Antitumor agents. 100. Inhibition of human DNA topoisomerase II by cytotoxic ether and ester derivatives of podophyllotoxin and .alpha.-peltatin
作者:Lee S. Thurston、Yasuhiro Imakura、Mitsumasa Haruna、De Hua Li、Zong Chao Liu、Su Ying Liu、Yung Chi Cheng、Kuo Hsiung Lee
DOI:10.1021/jm00123a016
日期:1989.3
A principal mechanism of action of the clinical antitumor drugs etoposide (1) and teniposide (2) is the inhibition of catalytic activity of type II DNA topoisomerase and concurrent enzyme-mediated production of lethal DNA strand breaks. Substitution of the glycosidic moiety of 1 or 2 by ester and ethers, as well as the esterification and etherification of alpha-peltatin (4) including its glucosidic ethylidene and thenylidene cyclic acetals (25 and 26), has afforded compounds of much less activity than that of 1. The in vitro cytotoxicity (KB) appears to have no correlation with the inhibitory activity of the human DNA topoisomerase II.