Metabolism of androstenone, 17β-estradiol and dihydrotestosterone in primary cultured pig hepatocytes and the role of 3β-hydroxysteroid dehydrogenase in this process

Chen, Gang; Bai, Ying; Ren, Li; Zhu, Dan; Li, Yanhua; Fang, Meiying; Al-Kateb, Huda; Doran, Olena

Abstract

© 2015 Chen et al. Steroids metabolism plays an important role in mammals and contributes to quality of pig meat. The main objective of this study was to identify metabolites of androstenone, 17β-estradiol and dihydrotestosterone using primary cultured pig hepatocytes as a model system. The role of 3β-hydroxysteroid dehydrogenase (3βHSD) in regulation of steroid metabolism was also validated using trilostane, a specific 3βHSD inhibitor. Steroid glucuronide conjugated metabolites were detected by liquid chromatography time of flight mass spectrometry (LC-TOF-MS). 3βHSD enzyme was essential for metabolism of androstenone to 5α-androst-16-en-3β-ol, which then formed androstenone glucuronide conjugate. Metabolism of 17β-estradiol was accompanied by formation of glucuronide-conjugated estrone and glucuronide-conjugated estradiol. The ratio of the two metabolites was around 5:1. 3βHSD enzyme was not involved in 17β-estradiol metabolism. 5α-Dihydrotestosterone-17β-glucuronide was identified as a dihydrotestosterone metabolite, and this metabolism was related to 3βHSD enzyme activity as demonstrated by inhibition study.

• Journal Article Type: Article
• Acceptance Date: Oct 20, 2014
• Online Publication Date: Jan 15, 2015
• Publication Date: Jan 15, 2015
• Publicly Available Date: Jun 6, 2019
• Journal: PLoS ONE
• Electronic ISSN: 1932-6203
• Publisher: Public Library of Science
• Peer Reviewed: Peer Reviewed
• Volume: 10
• Issue: 1
• Article Number: e113194
• DOI: https://doi.org/10.1371/journal.pone.0113194
• Keywords: metabolism, androstenone, 17β-estradiol, dihydrotestosterone, cultured pig, hepatocytes, 3β hydroxysteroid, dehydrogenase
• Public URL: https://uwe-repository.worktribe.com/output/839816
• Publisher URL: http://dx.doi.org/10.1371/journal.pone.0113194