SHBG gene promoter polymorphisms in men are associated with serum sex hormone-binding globulin, androgen and androgen metabolite levels, and hip bone mineral density.
Artikel i vetenskaplig tidskrift, 2006

CONTEXT: SHBG regulates free sex steroid levels, which in turn regulate skeletal homeostasis. Twin studies have demonstrated that genetic factors largely account for interindividual variation in SHBG levels. Glucuronidated androgen metabolites have been proposed as markers of androgenic activity. OBJECTIVE: Our objective was to investigate whether polymorphisms in the SHBG gene promoter [(TAAAA)(n) microsatellite and rs1799941 single-nucleotide polymorphism] are associated with serum levels of SHBG, sex steroids, or bone mineral density (BMD) in men. DESIGN AND STUDY SUBJECTS: We conducted a population-based study of two cohorts of Swedish men: elderly men (MrOS Sweden; n congruent with 3000; average age, 75.4 yr) and young adult men (GOOD study; n = 1068; average age, 18.9 yr). MAIN OUTCOME MEASURES: We measured serum levels of SHBG, testosterone, estradiol, dihydrotestosterone, 5alpha-androstane-3alpha,17beta-diol glucuronides, androsterone glucuronide, and BMD determined by dual-energy x-ray absorptiometry. RESULTS: In both cohorts, (TAAAA)(n) and rs1799941 genotypes were associated with serum levels of SHBG (P < 0.001), dihydrotestosterone (P < 0.05), and 5alpha-androstane-3alpha,17beta-diol glucuronides (P < 0.05). In the elderly men, they were also associated with testosterone and BMD at all hip bone sites. The genotype associated with high levels of SHBG was also associated with high BMD. Interestingly, male mice overexpressing human SHBG had increased cortical bone mineral content in the femur, suggesting that elevated SHBG levels may cause increased bone mass. CONCLUSIONS: Our findings demonstrate that polymorphisms in the SHBG promoter predict serum levels of SHBG, androgens, and glucuronidated androgen metabolites, and hip BMD in men.

Sex Hormone-Binding Globulin

physiology

Aged

Mice

Hip

Adolescent

Transgenic

metabolism

Genetic

Promoter Regions (Genetics)

genetics

Adult

Genotype

Male

Microsatellite Repeats

Polymorphism

Bone Density

physiology

physiology

Mice

Animals

80 and over

Aged

blood

Androgens

Humans

analysis

Författare

Anna-Lena Eriksson

Göteborgs universitet

Mattias Lorentzon

Göteborgs universitet

Dan Mellström

Göteborgs universitet

Liesbeth Vandenput

Göteborgs universitet

Charlotte Swanson

Göteborgs universitet

Niklas Andersson

Göteborgs universitet

Geoffrey L Hammond

Jenny Jakobsson

Anders Rane

Eric S Orwoll

Östen Ljunggren

Olof Johnell

Fernand Labrie

Sara H Windahl

Göteborgs universitet

Claes Ohlsson

Göteborgs universitet

Journal of Clinical Endocrinology and Metabolism

0021-972X (ISSN)

Vol. 91 5029-37

Ämneskategorier

MEDICIN OCH HÄLSOVETENSKAP

DOI

10.1210/jc.2006-0679

PubMed

16926255