Author/Editor     Starčević, Štefan; Brožič, Petra; Turk, Samo; Cesar, Jožko; Lanišnik-Rižner, Tea; Gobec, Stanislav
Title     Synthesis and biological evaluation of (6- and 7-phenyl) coumarin derivatives as selective nonsteroidal inhibitors of 17beta-hydroxysteroid dehydrogenase type 1
Type     članek
Source     J Med Chem
Vol. and No.     Letnik 54, št. 1
Publication year     2011
Volume     str. 248-61
Language     eng
Abstract     17beta-Hydroxysteroid dehydrogenase type 1 (17beta-HSD1) is an enzyme that catalyzes NADPH-dependent reduction of the weak estrogen, estrone, into the most potent estrogen, estradiol, which exerts proliferative effects via the estrogen receptors. Overexpression of 17beta-HSD1 in estrogen-responsive tissues is related to the development of hormone-dependent diseases, such as breast cancer and endometriosis; thus, 17beta-HSD1 represents an attractive target for the development of new therapies. We have discovered that simple coumarines 1 and 2 significantly inhibit 17beta-HSD1 in a recombinant enzyme assay, with high selectivity against 17beta-HSD2. We postulated that the introduction of various p-substituted phenyl moieties to position 6 or 7 of the coumarin core using the Suzuki-Miyaura cross-coupling reaction would provide mimetics of steroidal structures with improved inhibition of 17beta-HSD1. The best inhibitor in the series proved to be 6a, with an IC(50) of 270 nM, and with exceptional selectivity for 17beta-HSD1 over 17beta-HSD2 and against the alpha and beta estrogen receptors.
Descriptors     17-HYDROXYSTEROID DEHYDROGENASES
COUMARINS
ESTROGENS
NADH DEHYDROGENASE
ESTRADIOL
RECEPTORS, ESTROGEN
BIOLOGICAL ASSAY