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No difference between strontium ranelate and calcium / vitamin D on bone turnover markers in women with established osteoporosis previously treated with teriparatide: a randomized controlled trial.

Author(s): Anastasilakis AD, Goulis DG, Polyzos SA, Gerou S, Ballaouri I, Efstathiadou Z, Kita M, Avramidis A

Affiliation(s): Department of Endocrinology, Hippocration General Hospital, Thessaloniki, Greece.

Publication date & source: 2008-07-07, Clin Endocrinol (Oxf)., [Epub ahead of print]

Objective: To evaluate the effect of strontium ranelate (SR) on bone turnover markers in women with established osteoporosis previously treated with teriparatide (TPTD - recombinant human parathyroid hormone 1-34). Design - patients: Twenty-two postmenopausal Caucasian women (aged 65.7 +/- 1.7 years) with established osteoporosis previously treated with TPTD 20 mug daily for 18 months were randomly assigned to receive either SR (SR group, n = 11) or calcium and vitamin D (control group, n = 11). Measurements: Blood samples for serum N-terminal propeptide of type 1 collagen (P1NP), C-terminal telopeptide of type 1 collagen (CTx) and total alkaline phosphatase (ALP) were obtained from all women before (pre-TPTD) and after (post-TPTD) TPTD administration, as well as six months after SR or calcium / vitamin D administration (post-SR/Ca). Results: Serum P1NP, CTx and total ALP increased significantly after TPTD treatment and decreased at the end of the study in both SR and control groups, with no difference between them. Conclusions: SR following TPTD administration acts predominantly as an anti-resorptive agent with no evidence of additional osteoanabolic action. In this setting, SR is not more effective than Ca / vitamin D as far as bone turnover markers are concerned.

Page last updated: 2008-08-11

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