Cited by 104Hormonal and reproductive studiesSexual Differentiation and DisordersSperm and Testicular Function

The role of 5α-reduction in steroid hormone physiology

Wilson, Jean D.·2002·Reproduction Fertility and Development

Abstract

A role for 5alpha-reduction in androgen physiology was first established with the recognition that dihydrotestosterone, the 5alpha-reduced metabolite of testosterone, is formed in many androgen target tissues, binds to the androgen receptor with greater affinity than testosterone, and plays an essential role in virilization of the urogenital sinus and urogenital tubercle during male development. Two 5alpha-reductases perform this reaction, and both isoenzymes utilize NADPH as cofactor and have broad specificity for steroids containing a delta4,3-keto configuration. 5alpha-Reduction, which is essentially irreversible, flattens the steroid molecule because of altered relation of the A and B rings, and stabilizes the hormone-receptor complex. Studies involving in vitro reporter gene assays and intact mice in which both isoenzymes are disrupted, indicate that the fundamental effect of dihydrotestosterone formation is to amplify hormonal signals that can be mediated by testosterone at higher concentrations. 5alpha-Reduction also plays a role in the action of other steroid hormones, including the plant growth hormone, brassinolide, the boar pheromones, androstanol and androstenol, progesterone (in some species), and, possibly, aldosterone and cortisol. The fact that the reaction is important in plants and animals implies a fundamental role in steroid hormone action.

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Crossref · 10.1071/rd01074

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Authors
Wilson, J. D.
Affiliations
The University of Texas Southwestern Medical Center (US)
Corresponding author
Wilson, Jean D.
Venue
Reproduction Fertility and Development
Published
2002-02-13
Volume
13
Issue
8
Pages
673-678
ISSN
  • 1031-3613 (ISSN-L)
  • 1448-5990
OpenAlex
W2169225609
Cited by
104
References
29
Citations by year
2026: 1 · 2025: 3 · 2024: 4 · 2023: 5 · 2022: 10 · 2020: 2 · 2019: 4 · 2018: 5 · 2017: 5 · 2016: 2 · 2015: 3 · 2014: 1 · 2013: 7 · 2012: 6
FWCI
3.23
Type
journal article
Language
en
Open access
closed
Locations
  • Reproduction Fertility and Development (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sexual Differentiation and Disorders
  • Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
Keywords
5α-reduction, 5α-reductase, dihydrotestosterone, testosterone, androgen receptor, male development, NADPH cofactor, steroid hormone signaling, hormone-receptor complex, brassinolide, androstanol, androstenol, progesterone, aldosterone, cortisol, plant steroid hormones
MeSH terms
Androgens, Animals, Cholestanols, Humans, Isoenzymes, NADP, Plants, Receptors, Androgen, Dihydrotestosterone, Steroids, Heterocyclic, Substrate Specificity, Testosterone, 3-Oxo-5-alpha-Steroid 4-Dehydrogenase, Brassinosteroids

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