Synthesis of substituted 15β-alkoxy estrone derivatives and their cofactor-dependent inhibitory effect on 17β-HSD1

Herman, Bianka Edina and Kiss, Anita and Wölfling, János and Mernyák, Erzsébet and Szécsi, Mihály and Schneider, Gyula (2019) Synthesis of substituted 15β-alkoxy estrone derivatives and their cofactor-dependent inhibitory effect on 17β-HSD1. JOURNAL OF ENZYME INHIBITION AND MEDICINAL CHEMISTRY, 34 (1). pp. 1271-1286. ISSN 1475-6366

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Abstract

17b-Hydroxysteroid dehydrogenase type 1 (17b-HSD1) is a key enzyme in the biosynthesis of 17b-estradiol. Novel estrone-based compounds bearing various 15b-oxa-linked substituents and hydroxy, methoxy, benzyloxy, and sulfamate groups in position C3 as potential 17b-HSD1 inhibitors have been synthesized. In addition, in vitro inhibitory potentials measured in the presence of excess amount of NADPH or NADH were investigated. We observed substantial inhibitory potentials for several derivatives (IC50<1 mM) and increased binding affinities compared to unsubstituted core molecules. Binding and inhibition were found to be cofactor-dependent for some of the compounds and we propose structural explanations for this phenomenon. Our results may contribute to the development of new 17b-HSD1 inhibitors, potential drug candidates for antiestrogen therapy of hormone-dependent gynecological cancers.

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