Abstract
Testosterone concentrations in men are associated with cardiovascular morbidity, osteoporosis, and mortality and are affected by age, smoking, and obesity. Because of serum testosterone's high heritability, we performed a meta-analysis of genome-wide association data in 8,938 men from seven cohorts and followed up the genome-wide significant findings in one in silico (n = 871) and two de novo replication cohorts (n = 4,620) to identify genetic loci significantly associated with serum testosterone concentration in men. All these loci were also associated with low serum testosterone concentration defined as -41 and rs6258, p = 2.3×10 -22). Subjects with ≥3 risk alleles of these variants had 6.5-fold higher risk of having low serum testosterone than subjects with no risk allele. The rs5934505 polymorphism near FAM9B on the X chromosome was also associated with testosterone concentrations (p = 5.6×10 -16). The rs6258 polymorphism in exon 4 of SHBG affected SHBG's affinity for binding testosterone and the measured free testosterone fraction (p
Original language | English (US) |
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Article number | e1002313 |
Journal | PLoS Genetics |
Volume | 7 |
Issue number | 10 |
DOIs | |
State | Published - Oct 2011 |
Externally published | Yes |
ASJC Scopus subject areas
- Genetics
- Molecular Biology
- Ecology, Evolution, Behavior and Systematics
- Cancer Research
- Genetics(clinical)