Design, synthesis, and biological evaluation of indolequinone phosphoramidate prodrugs targeted to DT-diaphorase.
J Med Chem
; 45(16): 3540-8, 2002 Aug 01.
Article
en En
| MEDLINE
| ID: mdl-12139465
ABSTRACT
A series of 2- and 3-substituted indolequinone phosphoramidate prodrugs targeted to DT-diaphorase (DTD) have been synthesized and evaluated. These compounds are designed to undergo activation via quinone reduction by DTD followed by expulsion of the phosphoramide mustard substituent from the hydroquinone. Chemical reduction of the phosphoramidate prodrugs led to rapid expulsion of the corresponding phosphoramidate anions in both series of compounds. Compounds substituted at the 2-position are excellent substrates for human DTD (k(cat)/K(M) = (2-5) x 10(6) M(-1) s(-1)); however, compounds substituted at the 3-position are potent inhibitors of the target enzyme. Both series of compounds are toxic in HT-29 and BE human colon cancer cell lines in a clonogenic assay. There was a correlation found between cytotoxicity and DTD activity for the 2-series of phosphoramidates; however, there was no correlation between cytotoxicity and DTD activity in the 3-series of compounds. This finding suggests the presence of an alternative mechanism for the activation of these compounds.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Mostazas de Fosforamida
/
Profármacos
/
NAD(P)H Deshidrogenasa (Quinona)
/
Hidroquinonas
/
Antineoplásicos
Límite:
Humans
Idioma:
En
Revista:
J Med Chem
Asunto de la revista:
QUIMICA
Año:
2002
Tipo del documento:
Article
País de afiliación:
Estados Unidos