4-(3-Halo/amino-4,5-dimethoxyphenyl)-5-aryloxazoles and -<i>N</i>-methylimidazoles That Are Cytotoxic against Combretastatin A Resistant Tumor Cells and Vascular Disrupting in a Cisplatin Resistant Germ Cell Tumor Model
New combretastatin A analogues featuring oxazole or N-methylimidazole bridged Z-alkenes and haloor amino-substituted A-rings were tested against various cancer cell lines and in testicular germ cell tumor xenografts in mice. Imidazoles with 3-halo-4,5-dimethoxy substituted A-rings and 3-amino-4-methoxy substituted B-rings (7b and 8b) were efficacious at nanomolar concentrations against cells of combretastatin A refractory HT-29 colon carcinoma, multidrug-resistant MCF-7/Topo breast carcinoma, and cisplatin-resistant 1411 HP testicular germ cell tumor. They induced apoptosis and inhibited tubulin polymerization. While well tolerated by mice at high doses, these imidazoles initiated extensive intratumoral hemorrhage and regressions of highly vascularized 1411 HP xenografts.
Potent, Orally Active Heterocycle-Based Combretastatin A-4 Analogues: Synthesis, Structure−Activity Relationship, Pharmacokinetics, and In Vivo Antitumor Activity Evaluation
作者:Le Wang、Keith W. Woods、Qun Li、Kenneth J. Barr、Richard W. McCroskey、Steven M. Hannick、Laura Gherke、R. Bruce Credo、Yu-Hua Hui、Kennan Marsh、Robert Warner、Jang Y. Lee、Nicolette Zielinski-Mozng、David Frost、Saul H. Rosenberg、Hing L. Sham
DOI:10.1021/jm010523x
日期:2002.4.1
The synthesis and structure-activity relationship study of a series of compounds with heterocycles in place of the cis double bond in combretastatinA-4 (CA-4) are described. Substituted tosylmethyl isocyanides were found to be the key intermediates in construction of the heterocycles. Cytotoxicities of the heterocycle-based CA-4 analogues were evaluated against NCI-H460 and HCT-15 cancer cell lines