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Osteoporosis International

Erschienen in:

01.12.2008 | Original Article

Replication of associations between LRP5 and ESRRA variants and bone density in premenopausal women

verfasst von: S. Giroux, L. Elfassihi, D. E. C. Cole, F. Rousseau

Erschienen in: Osteoporosis International | Ausgabe 12/2008

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Abstract

Summary

Replication is a critical step to validate positive genetic associations. In this study, we tested two previously reported positive associations. The low density lipoprotein receptor-related protein 5 (LRP5) Val667Met and lumbar spine bone density are replicated. This result is in line with results from large consortiums such as Genomos. However, the estrogen-related receptor alpha (ESRRA) repeat in the promoter is not replicated although the polymorphism studied was functional and could have been a causative variant.

Introduction

We sought to validate associations previously reported between LRP5 V667M polymorphism and lumbar spine (LS, p = 0.013) and femoral neck (FN, p = 0.0002) bone mineral density (BMD), and between ESRRA 23 base pair repeat polymorphism and LS BMD (p = 0.0036) in a sample of premenopausal Caucasian women using an independent sample.

Methods

For the replication sample, we recruited 673 premenopausal women from the Toronto metropolitan area. All women were Caucasian and had BMD measured. LRP5 V667M was genotyped by allele-specific PCR and ESRRA repeats by sizing of PCR products on agarose gels.

Results

We reproduced the same association as we reported previously between LRP5 V667M and LS BMD (p = 0.015) but not with FN BMD (p = 0.254). The combined data from the two populations indicate an effect size of 0.28SD for LS BMD (p = 0.00048) and an effect size of 0.26 SD for FN BMD (p = 0.00037). In contrast, the association we reported earlier between ESRRA repeats and LS BMD was not replicated in the sample from Toronto (p = 0.645).

Conclusions

The association between LRP5 V667M and LS BMD is confirmed but not that between ESRRA repeats and LS BMD. This result indicates that it is imperative to validate any positive association in an independent sample.

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Titel: Replication of associations between LRP5 and ESRRA variants and bone density in premenopausal women
verfasst von: S. Giroux
L. Elfassihi
D. E. C. Cole
F. Rousseau
Publikationsdatum: 01.12.2008
Verlag: Springer-Verlag
Erschienen in: Osteoporosis International / Ausgabe 12/2008
Print ISSN: 0937-941X
Elektronische ISSN: 1433-2965
DOI: https://doi.org/10.1007/s00198-008-0617-z

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Abstract

Summary

Introduction

Methods

Results

Conclusions

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