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WNT16 influences bone mineral density, cortical bone thickness, bone strength, and osteoporotic fracture risk

Zheng, Hou-Feng; Tobias, Jon H; Duncan, Emma; Lehtimäki, Terho; Kähönen, Mika; Lyytikäinen, Leo-Pekka (2012)

 
 
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WNT16_influences_bone_2012.pdf (944.4Kt)
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Zheng, Hou-Feng
Tobias, Jon H
Duncan, Emma
Lehtimäki, Terho
Kähönen, Mika
Lyytikäinen, Leo-Pekka
et al.
2012

Plos Genetics 8 7
1-13
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doi:10.1371/journal.pgen.1002745
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http://urn.fi/URN:NBN:fi:uta-201210191060

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Public Library of Science open access
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We aimed to identify genetic variants associated with cortical bone thickness (CBT) and bone mineral density (BMD) by performing two separate genome-wide association study (GWAS) meta-analyses for CBT in 3 cohorts comprising 5,878 European subjects and for BMD in 5 cohorts comprising 5,672 individuals. We then assessed selected single-nucleotide polymorphisms (SNPs) for osteoporotic fracture in 2,023 cases and 3,740 controls. Association with CBT and forearm BMD was tested for ~2.5 million SNPs in each cohort separately, and results were meta-analyzed using fixed effect meta-analysis. We identified a missense SNP (Thr>Ile; rs2707466) located in the WNT16 gene (7q31), associated with CBT (effect size of −0.11 standard deviations [SD] per C allele, P = 6.2×10−9). This SNP, as well as another nonsynonymous SNP rs2908004 (Gly>Arg), also had genome-wide significant association with forearm BMD (−0.14 SD per C allele, P = 2.3×10−12, and −0.16 SD per G allele, P = 1.2×10−15, respectively). Four genome-wide significant SNPs arising from BMD meta-analysis were tested for association with forearm fracture. SNP rs7776725 in FAM3C, a gene adjacent to WNT16, was associated with a genome-wide significant increased risk of forearm fracture (OR = 1.33, P = 7.3×10−9), with genome-wide suggestive signals from the two missense variants in WNT16 (rs2908004: OR = 1.22, P = 4.9×10−6 and rs2707466: OR = 1.22, P = 7.2×10−6). We next generated a homozygous mouse with targeted disruption of Wnt16. Female Wnt16−/− mice had 27% (P<0.001) thinner cortical bones at the femur midshaft, and bone strength measures were reduced between 43%–61% (6.5×10−13
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33014 Tampereen yliopisto
oa[at]uta.fi | Yhteydenotto | Tietosuoja