Abstract
The aim of the study was to investigate the distribution of 163 A/G osteoprotegerin
gene promoter and 1181 G/C osteoprotegerin exon 1 polymorphisms in a group of women
with different hormonal status and to analyze their relationship with BMD. Osteoprotegerin
polymorphisms and BMD were analyzed in 332 women (69 premenopausal and 263 postmenopausal).
BMD was quantified at the lumbar spine (L2-4 ), femoral neck, and total hip. Genotyping for the presence of different polymorphisms
was performed using the Custom Taqman® SNP Genotyping assays. There were not significant differences in BMD according to
163 A/G genotype. However, significant differences in lumbar spine BMD were found
according to 1181 G/C alleles. Thus, women with CC genotype had significant higher
BMD at the lumbar spine than those with GC or GG genotype. No differences were found
in femoral neck and total hip BMD. In age-adjusted models, the 1181 G/C OPG polymorphism
explained 2.2% of BMD variance at the spine, 0.3% at the femoral neck, and 0.9% at
the total hip in the whole group. In the subgroup of premenopausal women, the polymorphism
was strongly related to spine BMD, and explained 11.5% of the variance, whereas body
weight explained 7.9%. The 1181 G/C polymorphism was associated with lumbar spine
BMD in Spanish women. Premenopausal women with the CC genotype had a higher BMD.
Key words
osteoprotegerin - single nucleotide polymorphisms - 1181 G/C - 163 A/G - bone mineral
density
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Correspondence
M. T. García-Unzueta
Clinical Biochemistry
Hospital Universitario “Marqués de Valdecilla”
University of Cantabria
Valdecilla Street
39008 Santander
Spain
Telefon: +34/942/20 25 14
Fax: +34/942/20 16 95, +34/942/20 16 63
eMail: mgunzueta@humv.es