|Chemical and physical data|
|Molar mass||349.52 g·mol−1|
|3D model (JSmol)|
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. 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. 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.
- Li Z, Alyamani M, Li J, Rogacki K, Abazeed M, Upadhyay SK, Balk SP, Taplin ME, Auchus RJ, Sharifi N (May 2016). "Redirecting abiraterone metabolism to fine-tune prostate cancer anti-androgen therapy". Nature. 533 (7604): 547–51. doi:10.1038/nature17954. PMID 27225130.
- Obst, J. K., & Sadar, M. D. (2016). Directing abiraterone metabolism: balancing the scales between clinical relevance and experimental observation. Translational Cancer Research, 3(5), S529-S531.