Strontium ranelate has no bone anabolic (dual) effects in treatment of osteoporosis

Authors: J. Štěpán
Authors‘ workplace: Revmatologický ústav a 1. lékařská fakulta UK, Praha
Published in: Čes. Revmatol., 22, 2014, No. 1, p. 18-24.
Category: Comments


The results of studies for approval for the treatment of osteoporosis in postmenopausal women and in men have demonstrated a significant increase in BMD at the lumbar spine and proximal femur and reduction in the relative risk of vertebral and non-vertebral fractures. Strontium deposited in bone attenuates X-rays more strongly than calcium, and causes an artifactual increase in BMD. Neither biochemical markers of bone remodeling, nor histomorphometry of unpaired and paired bone biopsies in women postmenopausal osteoporosis treated with SrR have provided sufficient evidence for the bone anabolic (or dual) effect of SrR. Experimental as well as clinical results have confirmed that strontium, like calcium, slightly reduce osteoclastic bone resorption. These effects of strontium are explained by the effects on calcium-sensing receptor of osteoclasts and osteocytes, and parathyroid glands. Further studies are need to test the hypothesis that the reduced fracture risk is due to changes in distribution of strontium in newly formed bone packets. Strontium ranelate is, hence, a medicine with evidenced effects on the risk of fractures, yet the mechanism of these effects still has not been clearly explained and requires further studies. The knowledge of the mechanism of action of strontium ranelate (SrR) is important not only for the explanation of the effects of SrR upon the skeleton, but also for the safety treatment for other tissues.

Key words:
Osteoporosis, bone mineral density, dual effect, strontium ranelate


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