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Erschienen in:

01.07.2009 | Original Article

Relation between fibroblast growth factor-23, body weight and bone mineral density in elderly men

verfasst von: R. Marsell, M. A. I. Mirza, H. Mallmin, M. Karlsson, D. Mellström, E. Orwoll, C. Ohlsson, K. B. Jonsson, Ö. Ljunggren, T. E. Larsson

Erschienen in: Osteoporosis International | Ausgabe 7/2009

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Abstract

Summary

We evaluated the relation between serum FGF23 and bone mineral density (BMD) in a community-based cohort of elderly men. There was a weak correlation between FGF23 and BMD, which was primarily dependent on body weight.

Introduction

FGF23 is a hormonal factor produced in bone and regulates serum levels of phosphate (Pi) and vitamin D. FGF23 over-expression is associated with skeletal abnormalities, including rickets/osteomalacia. The relation between FGF23 and Bone Mineral Density (BMD) in the community remains unexplored.

Methods

We employed a large, population-based cohort of 3014 Swedish men aged 69–80 years, without known renal disease. BMD was measured with dual X-ray absorptiometry (DXA) in the hip and lumbar spine. Serum intact FGF23 was analyzed with a two-site monoclonal ELISA.

Results

There was a weak but significant correlation between FGF23 and BMD in femoral neck (r = 0.04, p < 0.05), femoral trochanter (r = 0.05, p = 0.004), total hip (r = 0.06, p = 0.0015) and lumbar spine (r = 0.07, p = 0.0004). The correlations remained significant when adjusting for biochemical covariates (Pi, calcium, PTH, 25(OH)D and renal function). However, the association became insignificant in all regions when adjusting for established confounding variables including age, height, weight and smoking. Further analysis confirmed a significant correlation between FGF23 and body weight (r = 0.13, p < 0.0001).

Conclusions

The weak correlation between FGF23 and BMD in elderly male subjects is mainly due to an association between FGF23 and body weight. Therefore, FGF23 may not play a significant role in the hormonal regulation of BMD.

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Titel: Relation between fibroblast growth factor-23, body weight and bone mineral density in elderly men
verfasst von: R. Marsell
M. A. I. Mirza
H. Mallmin
M. Karlsson
D. Mellström
E. Orwoll
C. Ohlsson
K. B. Jonsson
Ö. Ljunggren
T. E. Larsson
Publikationsdatum: 01.07.2009
Verlag: Springer-Verlag
Erschienen in: Osteoporosis International / Ausgabe 7/2009
Print ISSN: 0937-941X
Elektronische ISSN: 1433-2965
DOI: https://doi.org/10.1007/s00198-008-0780-2

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Abstract

Summary

Introduction

Methods

Results

Conclusions

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