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Ikegami and colleagues [1] have recently reported that a direct association may exist between insufficiency of 25-hydroxyvitamin D [25(OH)D], bone turnover markers and prior vertebral fractures, independent of parathyroid hormone (PTH) activity. In 330 postmenopausal Japanese women with osteoporosis and normal PTH levels who had never been treated for osteoporosis, serum 25(OH)D levels, bone formation and resorption markers and presence of prior vertebral fractures were analyzed. In subjects with low 25(OH)D levels but normal calcium metabolism and PTH levels, an association was found with low serum osteocalcin/bone alkaline phosphatase (OC/BAP) ratio, low serum inorganic phosphorus levels and presence of prior vertebral fractures. This study revealed that vitamin D may have a direct effect on bone turnover and that 25(OH)D insufficiency is related to higher than normal prevalence of vertebral fractures.

Author(s)

  • Teodora Beljic Zivkovic
    Faculty of Medicine, University of Belgrade, Zvezdara University Medical Center, Belgrade, Serbia

Citations

  1. Ikegami S, Kamimura M, Uchiyama S, Kato H. Women with insufficient 25-hydroxyvitamin D without secondary hyperparathyroidism have altered bone turnover and greater incidence of vertebral fractures. J Orthop Sci 2011Jun 29. Epub ahead of print.
    http://www.ncbi.nlm.nih.gov/pubmed/21713425
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  4. Steingrimsdottir I, Gunnarsson O, Indridason OS, Franzson L, Sigurdsson G. Relationship between serum parathyroid levels, vitamin D sufficiency, and calcium intake. JAMA 2005;294:2336-2341.
    http://www.ncbi.nlm.nih.gov/pubmed/16278362
  5. Pirro M, Fabbriciani G, Leli C, et al. High weight or body mass index increase the risk of vertebral fractures in postmenopausal osteoporotic women. J Bone Miner Metab 2010;28:88-93.
    http://www.ncbi.nlm.nih.gov/pubmed/19578807
  6. Lagunova Z, Porojnicu AC, Lindberg F, Hexeberg S, Moan J. The dependency of vitamin D status on body mass index, gender, age and season. Anticancer Res 2009;29:3713-20.
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