Cited by 73Hormonal and reproductive studiesMuscle metabolism and nutritionAdrenal Hormones and Disorders

Development of models to predict anabolic response to testosterone administration in healthy young men

Woodhouse, Linda J., Reisz-Porszasz, Suzanne, Javanbakht, Marjan, Storer, Thomas W., Lee, Martin, Zerounian, Hrant, Bhasin, Shalender·2003·American Journal of Physiology-Endocrinology and Metabolism

Abstract

Considerable heterogeneity exists in the anabolic response to androgen administration; however, the factors that contribute to variation in an individual's anabolic response to androgens remain unknown. We investigated whether testosterone dose and/or any combination of baseline variables, including concentrations of hormones, age, body composition, muscle function, and morphometry or polymorphisms in androgen receptor could explain the variability in anabolic response to testosterone. Fifty-four young men were treated with a long-acting gonadotropin-releasing hormone (GnRH) agonist and one of five doses (25, 50, 125, 300, or 600 mg/wk) of testosterone enanthate (TE) for 20 wk. Anabolic response was defined as a change in whole body fat-free mass (FFM) by dual-energy X-ray absorptiometry (DEXA), appendicular FFM (by DEXA), and thigh muscle volume (by magnetic resonance imaging) during TE treatment. We used univariate and multivariate analysis to identify the subset of baseline measures that best explained the variability in anabolic response to testosterone supplementation. The three-variable model of TE dose, age, and baseline prostate-specific antigen (PSA) level explained 67% of the variance in change in whole body FFM. Change in appendicular FFM was best explained (64% of the variance) by the linear combination of TE dose, baseline PSA, and leg press strength, whereas TE dose, log of the ratio of luteinizing hormone to testosterone concentration, and age explained 66% of the variation in change in thigh muscle volume. The models were further validated by using Ridge analysis and cross-validation in data subsets. Only the model using testosterone dose, age, and PSA was a consistent predictor of change in FFM in subset analyses. The length of CAG tract was only a weak predictor of change in thigh muscle volume and lean body mass. Hence, the anabolic response of healthy, young men to exogenous testosterone administration can largely be predicted by the testosterone dose.

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Registry

Crossref · 10.1152/ajpendo.00536.2002

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Authors
Woodhouse, L. J., Reisz-Porszasz, S., Javanbakht, M., Storer, T. W., Lee, M., Zerounian, H., & Bhasin, S.
Affiliations
  • Charles R. Drew University of Medicine and Science (US)
  • Division of Endocrinology, Metabolism, and Molecular Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California 90059
Venue
American Journal of Physiology-Endocrinology and Metabolism
Published
2003-05-01
Volume
284
Issue
5
Pages
E1009-E1017
ISSN
  • 0193-1849 (ISSN-L)
  • 1522-1555
OpenAlex
W2127307761
Cited by
73
References
38
Citations by year
2025: 1 · 2024: 1 · 2022: 1 · 2021: 1 · 2020: 1 · 2018: 2 · 2017: 2 · 2016: 1 · 2015: 5 · 2014: 2 · 2013: 4 · 2012: 5
FWCI
3.87
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Endocrinology and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (ODP 1397)
  • U.S. Public Health Service (MO-00425)
  • National Institute on Aging (1R01AG14369, R01AG014369)
  • National Institute of Diabetes and Digestive and Kidney Diseases (1R01 DK 59627-01, R01DK049296, 2R01 DK 49296-05, R01DK059627)
  • National Center for Research Resources (P20 RR 11145-01, G12 RR 03026, G12RR003026, P20RR011145)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Hormonal and reproductive studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
Keywords
testosterone enanthate, anabolic response, androgen receptor polymorphism, CAG repeat length, prostate-specific antigen, fat-free mass, thigh muscle volume, leg press strength, GnRH agonist, testosterone supplementation, young men, prediction model
MeSH terms
Adult, Body Composition, Dose-Response Relationship, Drug, Double-Blind Method, Drug Administration Schedule, Forecasting, Hormones, Humans, Magnetic Resonance Imaging, Male, Models, Biological, Organ Size, Osmolar Concentration, Polymorphism, Genetic, Receptors, Androgen, Reference Values, Gonadal Steroid Hormones, Testosterone, Thigh, Absorptiometry, Photon, Muscle, Skeletal

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