Associations of body composition measures with circulating insulin-like growth factor-I, testosterone, and sex hormone-binding globulin concentrations in 16,000 men.

Autor: Hynes MC; Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK. mhynes@qmed.ca., Watling CZ; Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK., Dunneram Y; Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK., Key TJ; Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK., Perez-Cornago A; Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK.
Jazyk: angličtina
Zdroj: International journal of obesity (2005) [Int J Obes (Lond)] 2024 Dec; Vol. 48 (12), pp. 1809-1817. Date of Electronic Publication: 2024 Oct 21.
DOI: 10.1038/s41366-024-01633-0
Abstrakt: Background: Adiposity is positively associated with risk of some cancer sites and other health conditions in men; however, it is unclear if endogenous hormones play a role in these associations. We examined how body composition, measured from magnetic resonance imaging (MRI) and common measures of adiposity (e.g., body mass index (BMI)), are related to hormone concentrations in men from the UK Biobank study.
Methods: Up to 16,237 men with available body composition data (including visceral, subcutaneous, and liver fat, muscle fat infiltration (MFI), lean tissue, and common adiposity measures) and serum hormone measurements (insulin-like growth factor-I (IGF-I), total testosterone, sex hormone-binding globulin (SHBG), and calculated free testosterone) were included. Multivariable-adjusted linear regression models were used to determine the geometric mean hormone and SHBG concentrations across categories of each exposure.
Results: Common measurements of adiposity were highly correlated with MRI measures of central and total adiposity (r = 0.76-0.91), although correlations with ectopic fat (liver fat and MFI) were lower (r = 0.43-0.54). Most adiposity measurements showed an inverse U- or J-shaped association with circulating IGF-I and free testosterone; however, MFI was linearly inversely associated, and lean tissue volume was positively associated with both IGF-I and free testosterone concentrations. All body composition measures were inversely associated with total testosterone and SHBG concentrations (relative geometric mean difference between Q5 vs. Q1: 20-30%).
Conclusion: Our results show that common adiposity and most MRI measures of adiposity relate similarly to serum hormone concentrations; however, associations with ectopic fat (particularly MFI) and lean tissue were different.
Competing Interests: Competing interests: The authors declare no competing interests. Ethical approval: The UK Biobank has received ethics approval from the North West Multi-centre Research Ethics Committee (2021 approval reference 16/NW/0274). All participants provided informed consent to participate at recruitment. Our research required no additional ethical clearance.
(© 2024. The Author(s).)
Databáze: MEDLINE
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