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J Endocrinol Invest. 2015 Aug;38(8):859-63. doi: 10.1007/s40618-015-0299-2. Epub 2015 May 8.

Vitamin D and bone mineral density changes in postmenopausal women treated with strontium ranelate.

Author information

1
Department of Clinical and Experimental Medicine, University Hospital of Messina, A.O.U. Policlinico "G. Martino" Via C. Valeria, 98125, Messina, Italy, catalanoa@unime.it.

Abstract

OBJECTIVE:

Vitamin D deficiency is widespread and often reported in subjects treated for osteoporosis. Optimal vitamin D repletion was previously shown to maximize the efficacy of anti-resorptive agents. To date, no information exists about the role of vitamin D in the response to strontium ranelate (SrR) treatment. The aim of our study was to investigate the BMD response to SrR in accordance with change of vitamin D status.

METHODS:

A retrospective analysis of 108 women receiving SrR for postmenopausal osteoporosis was carried out. Women were treated with SrR (2 g/day), with cholecalciferol (25,000 IU biweekly) and calcium carbonate as appropriate. Lumbar spine and femoral neck BMD, bone formation markers (BGP, ALP), resorption marker (OH-PRO) and serum 25(OH)D were measured at baseline after 18-months. All participants were divided into two groups according to the median variation of 25(OH)D over the observation period.

RESULTS:

SrR was associated with improvement of BMD at lumbar spine (p < 0.0001) and to a non significant variation at femoral neck (p = 0.2). Only subjects with Δ25(OH)D > 6.14 %, reported a significant BMD gain at femoral neck (p = 0.03). Change of BMD at femoral neck was positively associated with modification of ALP (r = 0.28, p = 0.01). This association was not maintained when considering only women with Δ25(OH)D < 6.14 % (r = 0.28, p = 0.09). At a multiple regression analysis, ALP change was the only predictor of femoral neck BMD modification (β 0.13; SE 0.05; p = 0.01).

CONCLUSION:

Improvement of vitamin D status was associated with enhancement of BMD response to SrR in women with postmenopausal osteoporosis, in particular, at femoral neck.

PMID:
25952299
DOI:
10.1007/s40618-015-0299-2
[Indexed for MEDLINE]

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