Article (Scientific journals)
Heritability of blood concentrations of sex-steroids in relation to body composition in young adult male siblings.
Bogaert, Veerle; Taes, Youri; Konings, Peter et al.
2008In Clinical Endocrinology, 69 (1), p. 129-35
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Keywords :
Adipose Tissue/anatomy & histology; Adult; Body Composition/genetics; Body Mass Index; Case-Control Studies; Environment; Gonadal Steroid Hormones/blood/genetics; Humans; Male; Middle Aged; Phenotype; Quantitative Trait, Heritable; Siblings
Abstract :
[en] OBJECTIVE: Sex steroid concentrations in men are related to body composition and both are determined by genetic and environmental factors. This study investigates heritability estimates of sex steroid serum concentrations and body composition as well as the genetic and environmental components of their interrelation. PATIENTS: Six hundred and seventy-four men (25-45 years) were included in this study with 274 independent pairs of brothers. MEASUREMENTS: Body composition and regional fat mass estimates were determined using dual-energy X-ray absorptiometry. Serum testosterone (T), SHBG, oestradiol (E(2)) and LH levels were determined by immunoassay; free T and E(2) levels were calculated. RESULTS: Both sex steroid hormone concentrations and indices of body composition exhibited significant heritability estimates. Among sex steroid hormones, T had the highest heritability (h(2) = 0.65), followed by free T (h(2) = 0.54). A heritability of 0.73 was observed for SHBG; a heritability estimate of 0.83 was obtained for body weight. Significant genetic correlations were found between whole body fat mass and serum T (rho(G) = -0.46), free T (rho(G) = -0.27) and SHBG (rho(G) = -0.48) concentrations. No genetic relationship was observed between total (F) E(2) or LH concentrations, respectively, and body composition. CONCLUSION: Both sex steroid serum levels and body composition are under strong genetic control. Their interrelation is in part underlied by a genetic correlation, indicative of the action of shared genes.
Disciplines :
Genetics & genetic processes
Author, co-author :
Bogaert, Veerle
Taes, Youri
Konings, Peter
Van Steen, Kristel  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Bioinformatique
De Bacquer, Dirk
Goemaere, Stefan
Zmierczak, Hans
Crabbe, Patricia
Kaufman, Jean*-Marc
Language :
English
Title :
Heritability of blood concentrations of sex-steroids in relation to body composition in young adult male siblings.
Publication date :
2008
Journal title :
Clinical Endocrinology
ISSN :
0300-0664
eISSN :
1365-2265
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
69
Issue :
1
Pages :
129-35
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 22 May 2010

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