Inhibition of all-TRANS-retinoic acid metabolism by R116010 induces antitumour activity

Autor: Gerard Charles Sanz, B Janssen, J. Van Dun, L Dillen, C. Van Hove, Walter Wouters, J Van heusden, P Moelans, H Bruwiere, R Van Ginckel, G Willemsens, B.-J. Van Der Leede, Wim Floren, Michel Janicot, Marc Venet
Jazyk: angličtina
Rok vydání: 2002
Předmět:
Zdroj: British Journal of Cancer
ISSN: 1532-1827
0007-0920
Popis: All-trans-retinoic acid is a potent inhibitor of cell proliferation and inducer of differentiation. However, the clinical use of all-trans-retinoic acid in the treatment of cancer is significantly hampered by its toxicity and the prompt emergence of resistance, believed to be caused by increased all-trans-retinoic acid metabolism. Inhibitors of all-trans-retinoic acid metabolism may therefore prove valuable in the treatment of cancer. In this study, we characterize R116010 as a new anticancer drug that is a potent inhibitor of all-trans-retinoic acid metabolism. In vitro, R116010 potently inhibits all-trans-retinoic acid metabolism in intact T47D cells with an IC50-value of 8.7 nM. In addition, R116010 is a selective inhibitor as indicated by its inhibition profile for several other cytochrome P450-mediated reactions. In T47D cell proliferation assays, R116010 by itself has no effect on cell proliferation. However, in combination with all-trans-retinoic acid, R116010 enhances the all-trans-retinoic acid-mediated antiproliferative activity in a concentration-dependent manner. In vivo, the growth of murine oestrogen-independent TA3-Ha mammary tumours is significantly inhibited by R116010 at doses as low as 0.16 mg kg−1. In conclusion, R116010 is a highly potent and selective inhibitor of all-trans-retinoic acid metabolism, which is able to enhance the biological activity of all-trans-retinoic acid, thereby exhibiting antitumour activity. R116010 represents a novel and promising anticancer drug with an unique mechanism of action. British Journal of Cancer (2002) 86, 605–611. DOI: 10.1038/sj/bjc/6600056 www.bjcancer.com © 2002 Cancer Research UK
Databáze: OpenAIRE