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Runx-2 gene expression is associated with age-related changes of bone mineral density in the healthy young-adult population

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Abstract

Bone mineral density (BMD) and peak bone mass (PBM) are important determinants of skeletal resistance. The development of bone densitometry improved the possibility of studying BMD and the influence of genetic and environmental factors on bone. Heredity factors are important for BMD, and Runx-2 is accepted as a regulator of osteoblasts and bone formation. The aim of our study was to evaluate the behavior of Runx-2 during skeletal maturity in the healthy young-adult population. We analyzed spine and hip BMD in 153 volunteers, 98 women and 55 men, using dual-energy X-ray absorptiometry. In a subgroup of these volunteers, a sample of peripheral blood was taken to perform gene expression analysis of Runx-2 both in peripheral mesenchymal stem cells (MSCs; 28 subjects) and in peripheral mononuclear cells (PBMCs; 140 subjects). In our work BMD was comparable in both genders after puberty, then became higher in men than women during the third and fourth decades. PBM was achieved in the third decade in women and in the fourth in men. More interestingly, Runx-2 gene expression highly correlated with BMD in both genders. MSCs and PBMCs showed the same gene expression profile of Runx-2. In conclusion, PBM is reached earlier in females, BMD becomes higher in males later in life, and BMD and PBM are strictly associated with Runx-2. In addition, PBMC should be considered an important source for gene expression analysis in bone diseases.

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Authors and Affiliations

  1. Department of Medicine, Clinic of Internal Medicine, Section D, University of Verona, Piazzale Scuro, 37134, Verona, Italy

    Mirko Zanatta, Maria Teresa Valenti, Luca Donatelli, Chiara Zucal & Luca Dalle Carbonare

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  1. Mirko Zanatta
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  2. Maria Teresa Valenti
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  3. Luca Donatelli
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  4. Chiara Zucal
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  5. Luca Dalle Carbonare
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Correspondence to Maria Teresa Valenti.

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Zanatta, M., Valenti, M.T., Donatelli, L. et al. Runx-2 gene expression is associated with age-related changes of bone mineral density in the healthy young-adult population. J Bone Miner Metab 30, 706–714 (2012). https://doi.org/10.1007/s00774-012-0373-1

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  • DOI: https://doi.org/10.1007/s00774-012-0373-1

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