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Maltais, René; Fournier, Michelle-Audrey; Poirier, Donald
Bioorganic & medicinal chemistry, 08/2011, Letnik: 19, Številka: 15Journal Article
Display omitted 17Beta-hydroxysteroid dehydrogenase type 3 (17β-HSD3) is a steroidogenic enzyme that catalyzes the transformation of 4-androstene-3,17-dione (Δ 4-dione) into androgen testosterone (T). To provide effective inhibitors of androgen biosynthesis, we synthesized two different series (amines and carbamates) of 3β-substituted-androsterone derivatives and we tested their inhibitory activity on 17β-HSD3. From the results of our structure–activity relationship study, we identified a series of compounds producing a strong inhibition of 17β-HSD3 overexpressed in HEK-293 cells (homogenized cells). The most active compound when tested in intact HEK-293 transfected cells, namely (3α,5α)-3-{ trans-2,5-dimethyl-4-{2-(trifluoromethyl)phenyl sulfonyl}piperazin-1-ylmethyl}-3-hydroxyandrostan-17-one ( 15b), shows an IC 50 value of 6 nM, this compound is thus eight times more active than our reference compound D-5-2 (IC 50 = 51 nM). This new improved inhibitor did not stimulate the proliferation of androgen-sensitive Shionogi cells, suggesting a non-androgenic profile. Compound 15b is thus a good candidate for further in vivo studies on rodents.
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