Cited by 42Sperm and Testicular FunctionHormonal and reproductive studiesAdrenal Hormones and Disorders

Nicotine and cotinine inhibit rat testis androgen biosynthesis in vitro

yeh, John, Barbieri, Robert L., Friedman, Andrew J.·1989·Journal of Steroid Biochemistry

Abstract

The effects of nicotine and cotinine, the major metabolite of nicotine, on testosterone production in rat testis were investigated. Rat Leydig cells were isolated and incubated with nicotine and cotinine. Nicotine produced a dose dependent increase in progesterone levels and a dose-dependent decrease in androstenedione and testosterone concentrations. Cotinine produced a dose-dependent increase in progesterone and androstenedione and a dose-dependent decrease in testosterone levels. The effects of nicotine and cotinine on rat testis mitochondrial cholesterol side chain cleavage enzyme and microsomal 3 beta-hydroxysteroid dehydrogenase-isomerase, 17 alpha-hydroxylase, 17,20-lyase and 17-ketosteroid reductase were examined. Nicotine competitively inhibited 17 alpha-hydroxylase (apparent Ki = 30 microM) and 17,20-lyase (apparent Ki = 18 microM). Cotinine competitively inhibited 17-ketosteroid reductase (apparent Ki = 46 microM). The addition of nicotine to preparations of rat testis microsomes yielded a Type II cytochrome P-450 binding spectrum. We conclude that nicotine and cotinine competitively inhibit multiple steps in testosterone biosynthesis.

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Crossref · 10.1016/0022-4731(89)90051-4

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12 of 12 references verified0 citation errors · 0 not checkable

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  1. Gunasegaram, 1982, Inhibition of second trimester human placental cholesterol C-20,22-desmolase activity by soluble constituents of cigarette smoke, IRCS Med. Sci., 10, 322

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Authors
yeh, J., Barbieri, R. L., & Friedman, A. J.
Affiliations
Harvard University (US)
Venue
Journal of Steroid Biochemistry
Publisher
Elsevier BV
Published
1989-10
Volume
33
Issue
4
Pages
627-630
ISSN
0022-4731 (ISSN-L)
OpenAlex
W2005662205
Cited by
42
References
12
Citations by year
2025: 1 · 2024: 2 · 2021: 1 · 2020: 1 · 2019: 2 · 2018: 2 · 2017: 4 · 2016: 1 · 2015: 1 · 2014: 1 · 2013: 2
FWCI
0.89
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Steroid Biochemistry (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Sperm and Testicular Function
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
Keywords
nicotine, cotinine, testosterone production, Leydig cells, androgen synthesis inhibition, 17α-hydroxylase, 17,20-lyase, cholesterol side-chain cleavage enzyme, cytochrome P450, competitive inhibition, rat testis
MeSH terms
Androgens, Animals, Cotinine, Leydig Cells, Male, Nicotine, Pyrrolidinones, Rats, Inbred Strains, Subcellular Fractions, Testis, Rats, In Vitro Techniques

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