Search resultsEffect of hop (Humulus lupulus L.) flavonoids on aromatase (estrogen synthase) activity
Title
Effect of hop (Humulus lupulus L.) flavonoids on aromatase (estrogen synthase) activity
Publication type
Journal Article
Year of Publication
2006
Authors
Journal
Journal of Agricultural and Food Chemistry
Volume
54
Issue
8
Pagination
2938 - 2943
Date published
2006
ISBN
00218561 (ISSN)
Keywords
8 prenylnaringenin, 8-Prenylnaringenin, 8-prenylnaringenin, xanthohumol, aromatase, aromatase inhibitor, Aromatase Inhibitors, article, beer, Cell Line, chemistry, choriocarcinoma, Estrogens, flavanone derivative, Flavanones, flavonoid, Flavonoids, hop, Humulus, Humulus lupulus, isoxanthohumol, metabolism, propiophenone derivative, Propiophenones, xanthohumol
Abstract
The aim of this work was to study the effect of the prenylflavonoids xanthohumol, isoxanthohumol, and 8-prenylnaringenin on the activity and expression of the enzyme aromatase (estrogen synthase). The effect of different kinds of beer containing these prenylflavonoids was also tested. Aromatase activity was determined by measuring the release of tritiated water during the conversion of [3H]-androstenedione to estrone. Aromatase expression was determined by RT-PCR. This assay was carried out in choriocarcinoma-derived JAR cells. The tested prenylflavonoids were able to inhibit estrogen formation, and their IC50 values were determined, although no effect on aromatase expression was found. Lager beer, alcohol-free beer, stout beer, and xanthohumol-rich stout beer (200 μL/mL) significantly decreased aromatase activity. In conclusion, prenylflavonoids are able to modulate aromatase activity, decreasing estrogen synthesis, with relevance for the prevention and treatment of estrogen-dependent disorders such as breast cancer.