Potent Antitubulin Tumor Cell Cytotoxins Based on 3-Aroyl Indazoles
摘要:
A series of 3-aroyl indazoles was synthesized. Modification of the C-7 position resulted in a significant structure-activity relationship (SAR) with acetylene modifications conferring unusual potency in a tumor cell cytotoxicity assay. The most potent compounds exceeded the activity of combretastatin A4 (CA-4), showing single digit nM IC50 values against all cell lines tested including those with known efflux resistance pumps. The inhibition of in vitro tubulin polymerization was comparable to CA-4, consistent with tubulin being the target for these compounds. Competition binding experiments employing [H-3]colchicine and purified tubulins demonstrated that the compound specifically binds to the colchicine site.
Tubulin Binding Anti Cancer Agents And Prodrugs Thereof
申请人:Matteucci Mark
公开号:US20090042820A1
公开(公告)日:2009-02-12
Novel tubulin binding compounds and hypoxia activated prodrugs of novel and known tubulin binding compounds useful for treating cancer and other hyperproliferative diseases are disclosed.
WO2008/151253
申请人:——
公开号:——
公开(公告)日:——
Potent Antitubulin Tumor Cell Cytotoxins Based on 3-Aroyl Indazoles
A series of 3-aroyl indazoles was synthesized. Modification of the C-7 position resulted in a significant structure-activity relationship (SAR) with acetylene modifications conferring unusual potency in a tumor cell cytotoxicity assay. The most potent compounds exceeded the activity of combretastatin A4 (CA-4), showing single digit nM IC50 values against all cell lines tested including those with known efflux resistance pumps. The inhibition of in vitro tubulin polymerization was comparable to CA-4, consistent with tubulin being the target for these compounds. Competition binding experiments employing [H-3]colchicine and purified tubulins demonstrated that the compound specifically binds to the colchicine site.