Development of Novel Quinone Phosphorodiamidate Prodrugs Targeted to DT-Diaphorase
作者:Carolee Flader、Jiwen Liu、Richard F. Borch
DOI:10.1021/jm000179o
日期:2000.8.1
A series of naphthoquinone and benzimidazolequinone phosphorodiamidates has been synthesized and studied as potential cytotoxic prodrugs activated by DT-diaphorase. Reduction of the quinone moiety in the target compounds was expected to provide a pathway for expulsion of the phosphoramide mustard alkylating agent. All of the compounds synthesized were excellent substrates for purified human DT-diaphorase (k(cat)/K-m = 3 x 10(7) - 3 x 10(8) M-1 s(-1)). The naphthoquinones were toxic to both HT-29 and BE human colon cancer cell lines in a clonogenic assay; however, cytotoxicity did not correlate with DT-diaphorase activity in these cell lines. The benzimidazolequinone analogues were 1-2 orders of magnitude less cytotoxic than the naphthoquinone analogues. Chemical reduction of the naphthoquinone led to rapid expulsion of the phosphorodiamidate anion; in contrast, the benzimidazole reduction product was stable. Michael addition of glutathione and other sulfur nucleophiles provides an alternate mechanism for activation of the naphthoquinone phosphorodiamidates, and this mechanism may contribute to the cytotoxicity of these compounds.
PHOSPHORAMIDATE ALKYLATOR PRODRUGS
申请人:Threshold Pharmaceuticals, Inc.
公开号:EP1896040B1
公开(公告)日:2012-08-01
[EN] PHOSPHORAMIDATE ALKYLATOR PRODRUGS<br/>[FR] PRODROGUES D'ALKYLATEUR DE PHOSPHORAMIDATE
申请人:THRESHOLD PHARMACEUTICALS INC
公开号:WO2007002931A2
公开(公告)日:2007-01-04
[EN] Phosphoramidate alkylator prodrugs can be used to treat cancer when administered alone or in combination with one or more anti-neoplastic agents. [FR] La présente invention a trait à des prodrogues d'alkylateur de phosphoramidate apte à être utilisés pour le traitement du cancer lorsqu'ils sont administrés seuls ou en combinaison avec un ou des agents anti-néoplasiques.
[EN] Pyrophosphoramide alkylators are useful in treatment of cancer and other hyperproliferative diseases. [FR] L'invention concerne des agents d'alkylation pyrophosphoramide utiles dans le traitement du cancer et d'autres maladies hyperprolifératives.