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  • Title: The importance of assessing the rate of bone turnover and the balance between bone formation and bone resorption during daily teriparatide administration for osteoporosis: a pilot study.
    Author: Nakatoh S.
    Journal: J Bone Miner Metab; 2016 Mar; 34(2):216-24. PubMed ID: 26031934.
    Abstract:
    This study aimed to examine the importance of simultaneously measuring bone formation and resorption markers during daily teriparatide administration. In 135 women with osteoporosis, bone mineral density (BMD) was measured at 0, 24, and 48 weeks after teriparatide administration. Bone-specific alkaline phosphatase and tartrate-resistant acid phosphatase 5b were measured at 0, 4, 12, 24, 36, and 48 weeks. Subanalyses were performed in groups divided according to the BMD change at 48 weeks (increased and decreased groups), history of fragility fracture (acute and chronic groups), and treatment prior to teriparatide administration (alendronate, raloxifene, and naïve groups). The scatter diagram of multiple of median formation (MoMf) and multiple of median resorption (MoMr) showed that the distribution gradually spread to a high turnover by week 24. A significant correlation was observed between the rate of change in BMD at week 48 and the turnover rate [√(MoMf(2) + MoMr(2))] at week 0. Significant differences were observed in the turnover rate between the acute and chronic groups at weeks 0 and 4 and between the groups divided according to prior treatment from week 0 to 24. Because the assessment of either bone formation markers or bone resorption markers may result in erroneous data, it is necessary to assess them together during teriparatide treatment. The turnover rate at treatment initiation is a useful indicator to predict changes in BMD. When evaluating the turnover rate and balance (MoMf/MoMr), one should consider patient characteristics, including history of fragility fracture and prior treatment.
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