Abstract:
:Peak bone mass achieved in adolescence is a determinant of bone mass in later life. In order to identify genetic variants affecting bone mineral density (BMD), we performed a genome-wide association study of BMD and related traits in 1518 children from the Avon Longitudinal Study of Parents and Children (ALSPAC). We compared results with a scan of 134 adults with high or low hip BMD. We identified associations with BMD in an area of chromosome 12 containing the Osterix (SP7) locus, a transcription factor responsible for regulating osteoblast differentiation (ALSPAC: P = 5.8 x 10(-4); Australia: P = 3.7 x 10(-4)). This region has previously shown evidence of association with adult hip and lumbar spine BMD in an Icelandic population, as well as nominal association in a UK population. A meta-analysis of these existing studies revealed strong association between SNPs in the Osterix region and adult lumbar spine BMD (P = 9.9 x 10(-11)). In light of these findings, we genotyped a further 3692 individuals from ALSPAC who had whole body BMD and confirmed the association in children as well (P = 5.4 x 10(-5)). Moreover, all SNPs were related to height in ALSPAC children, but not weight or body mass index, and when height was included as a covariate in the regression equation, the association with total body BMD was attenuated. We conclude that genetic variants in the region of Osterix are associated with BMD in children and adults probably through primary effects on growth.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Timpson NJ,Tobias JH,Richards JB,Soranzo N,Duncan EL,Sims AM,Whittaker P,Kumanduri V,Zhai G,Glaser B,Eisman J,Jones G,Nicholson G,Prince R,Seeman E,Spector TD,Brown MA,Peltonen L,Smith GD,Deloukas P,Evans DMdoi
10.1093/hmg/ddp052subject
Has Abstractpub_date
2009-04-15 00:00:00pages
1510-7issue
8eissn
0964-6906issn
1460-2083pii
ddp052journal_volume
18pub_type
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