Английская Википедия:3-Keto-5α-abiraterone

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3-Keto-5α-abiraterone, also known as 17-(3-pyridyl)-5α-androst-16-en-3-one, is an active metabolite of abiraterone acetate that has been found to possess androgenic activity and to stimulate prostate cancer progression.[1][2] It is formed as follows: abiraterone acetate to abiraterone by esterases; abiraterone to Δ4-abiraterone by 3β-hydroxysteroid dehydrogenase/Δ5-4 isomerase; and Δ4-abiraterone to 3-keto-5α-abiraterone by 5α-reductase.[1][2] 3-Keto-5α-abiraterone may counteract the clinical effectiveness of abiraterone acetate, and so inhibition of its formation using the 5α-reductase inhibitor dutasteride is being investigated as an adjunct to abiraterone acetate in the treatment of prostate cancer.[1][2]

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