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Effect of testosterone, estrone sulphate and androstenone on 3β-hydroxysteroid dehydrogenase protein expression in primary cultured hepatocytes

Nicolau-Solano, Silvia I; Doran, Olena

Authors

Silvia I Nicolau-Solano

Olena Doran Olena.Doran@uwe.ac.uk
College Dean of Research and Enterprise



Abstract

Androstenone (5α-androst-16-en-3-one) is a steroid pheromone, excessive accumulation of which in pig adipose tissue contributes to the phenomenon of "boar taint". The incidence of boar taint increases with age and weight of entire male pigs. One of the reasons for the excessive accumulation of androstenone in adipose tissue of some pigs is a low rate of androstenone degradation in pig liver, which is related to defective expression of the androstenone-metabolising enzyme 3β-hydroxysteroid dehydrogenase (3β-HSD). The mechanism regulating 3β-HSD expression in pig liver remains unclear. The present study investigated the effects of the sex steroids testosterone, estrone sulphate and androstenone on the expression of 3β-HSD protein using primary cultured hepatocytes as a model system. The study was performed on hepatocytes from pigs of two weight/age groups: "lighter weight" (average carcass weight 70kg, age 21weeks) and "heavier weight" (average carcass weight 92kg, age 26weeks). Testosterone at the range of concentrations from 5 to 100nM induced 3β-HSD expression in "lighter weight" pigs but not in "heavier weight" animals. In contrast, estrone sulphate (5 to 100nM) and androstenone (5 to 500nM) induced 3β-HSD expression only in "heavier weight" but not "lighter weight" pigs. Induction of 3β-HSD expression by the sex steroids was protein-synthesis-dependent. Overall this study demonstrates for the first time that sex steroids are involved in regulation of 3β-HSD protein expression in primary cultured pig hepatocytes and that the effect of sex steroids depends on age and weight of animals. The results of this work might contribute to understanding the mechanism controlling androstenone deposition in pigs. © 2007 Elsevier B.V. All rights reserved.

Citation

Nicolau-Solano, S. I., & Doran, O. (2008). Effect of testosterone, estrone sulphate and androstenone on 3β-hydroxysteroid dehydrogenase protein expression in primary cultured hepatocytes. Livestock Science, 114(2-3), 202-210. https://doi.org/10.1016/j.livsci.2007.05.001

Journal Article Type Article
Publication Date Apr 1, 2008
Journal Livestock Science
Print ISSN 1871-1413
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 114
Issue 2-3
Pages 202-210
DOI https://doi.org/10.1016/j.livsci.2007.05.001
Keywords steroids, protein expression, primary cultured hepatocytes, 3-beta hydroxysteroid dehydrogenase
Public URL https://uwe-repository.worktribe.com/output/1020678
Publisher URL http://dx.doi.org/10.1016/j.livsci.2007.05.001