Ontogeny and pathway of formation of 5a-androstane-3a,17ß-diol in the testes of the immature brushtail possum Trichosurus vulpecula
Abstract
The testicular androgen 5alpha;-androstane-3alpha,17beta-diol (androstanediol) mediates virilisation in pouch young of a marsupial, the tammar wallaby, and is the principal androgen formed in immature rodent testes. To chart the pattern of androstanediol formation in another marsupial species, the testes or fragments of testes from brushtail possums (Trichosurus vulpecula) that spanned the age range from early pouch young to mature adults were incubated with (3)H-progesterone and the products were identified by high-performance liquid chromatography. The only 19-carbon steroids identified in pouch young and adult testes were the Delta(4)-3-keto-steroids testosterone and androstenedione. However, androstanediol and another 5alpha-reduced androgen (androsterone) were synthesised by testes from Day 87-200 males and these appeared to be formed from the 5alpha-reduction and 3-keto reduction of testosterone and androstenedione. In the prostate and glans penis of the immature male, (3)H-androstanediol was converted to dihydrotestosterone. We conclude that the timing of androstanediol formation in the possum testis resembles the process in rodents rather than in the tammar wallaby and that any androstanediol in the circulation probably acts in target tissues via conversion to dihydrotestosterone.
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- Authors
- Wilson, J. D., Shaw, G., Renfree, M. B., Auchus, R. J., Leihy, M. W., & Eckery, D. C.
- Affiliations
- The University of Melbourne (AU)
- ADepartment of Zoology, University of Melbourne, Victoria 3010, Australia.
- The University of Texas Southwestern Medical Center (US)
- AgResearch (NZ)
- Corresponding author
- Wilson, Jean D.
- Venue
- Reproduction Fertility and Development
- Publisher
- CSIRO Publishing
- Published
- 2005-06-17
- Volume
- 17
- Issue
- 6
- Pages
- 603-609
- ISSN
- 1031-3613 (ISSN-L)
- 1448-5990
- OpenAlex
- W1973382995
- Cited by
- 10
- References
- 34
- Citations by year
- 2023: 1 · 2021: 1 · 2019: 1 · 2016: 2
- FWCI
- 0.35
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Reproduction Fertility and Development (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of Diabetes and Digestive and Kidney Diseases (R21DK59942, R21DK059942)
- Topics
- Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sexual Differentiation and Disorders
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
- Keywords
- androstanediol, 5α-reduced androgens, androgen production, testis, Trichosurus vulpecula, marsupial development, masculinization, pouch young, testosterone, androstenedione, androsterone, dihydrotestosterone, 5α-reduction
- MeSH terms
- Animals, Chromatography, High Pressure Liquid, Male, Penis, Progesterone, Prostate, Dihydrotestosterone, Testis, 3-Oxo-5-alpha-Steroid 4-Dehydrogenase, Androstane-3,17-diol, 17-alpha-Hydroxyprogesterone, Trichosurus
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