Bone Abstracts

Denosumab treatment is associated with low fracture incidence, sustained BMD increases, and reduced sCTX. The decrease in median sCTX is at the quantifiable limit (0.049 ng/ml) one month post-dose, remains low, and attenuates at the end of the 6-month dosing interval. Using 7 years of data from the FREEDOM study and its extension, we characterized changes in sCTX over time and the influencing factors. In the bone turnover marker and pharmacokinetic substudies, serum was collec...

Aim: We explored the hypothesis that idiopathic hypercalciuria (IH) causes increased bone loss in early post-menopausal women.Materials and methods: We studied 41 postmenopausal women with IH. Inclusion criteria: i) recently (<6 months) diagnosed and untreated IH, ii) postmenopausal status >2 years, and iii) normal renal function. Exclusion criteria: i) all causes of hypercalciuria other than IH and ii) use of any medication for osteoporosis 1-ye...

Poor bone mineralization remains a major health problem in patients with Thal and has been linked to functional zinc deficiency despite adequate dietary intake. The global etiology of poor bone mineralization includes inadequate dietary intake of calcium and vitamin D, endocrinopathies leading to disturbed calcium homeostasis, dysregulation of the GH–IGF1 axis, and delayed puberty, all resulting in limited growth, decreased bone formation and increased bone resorption. Th...

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In clinical studies, denosumab (DMAb) administration up to 8 years is associated with continued increases in bone mineral density (BMD) and low fracture incidence despite persistently low bone turnover markers and limited iliac crest tetracycline labelling (Papapoulos 2013). We tested the hypothesis that, with persistently low bone remodelling, BMD increases may result from a non-remodelling dependent mechanism to accrue bone matrix. We examined the fluorochrome labelling patt...

Signaling pathways crucial in bone development, including Wnt, are also upregulated in breast cancer cells to promote tumor growth in the skeleton, a process known as osteomimicry. Thus, we hypothesized that bone metastatic tumor cells also aberrantly express osteogenic miRNAs to support osteomimetic properties. We have previously shown that miR-218 is highly expressed in osteoblasts and promotes osteogenic differentiation. Interestingly, expression analysis revealed a signifi...

Introduction: Osteoporosis affects the bones causing weak or brittle bones and increasing the risk of fracture. Efficacy of anti-osteoporotic treatment is based on drug potency and adherence and persistence. Teriparatide (TPTD) is the first anabolic agent developed for the treatment of osteoporosis. It is usually given as a daily subcutaneous injection for a two-year treatment course.Aim: To evaluate adherence and persistence to TPTD treatment in patient...

Introduction: Parathyroid hormone (PTH) measurement is of use in i) differential diagnosis of hypercalcaemia and ii) patients with renal impairment at risk of bone disease. PTH immunoassays are complicated by cross-reactivity with truncated (inactive) variant forms, which accumulate in patients with renal impairment. PTH assay variability is a critical governance issue in renal medicine, suggesting an MS-based reference method is required.Aim: To develop...

Background: Low vitamin D concentrations among children and adolescents at northern latitudes are frequently observed. Also, inverse associations between 25-hydroxyvitamin D (25(OH)D) and PTH concentrations have been found in children of different ages. More studies on the link between vitamin D status and childhood bone health are needed.Objective: To evaluate the status of serum 25(OH)D in autumn and the association between 25(OH)D concentrations and b...

The chronic use of glucocorticoids in patients with congenital adrenal hyperplasia (CAH) may result in decreased bone mass. Therefore, using simple and accurate methods for assessing bone status in these patients could facilitate the treatment of disease. The purpose of this study was to verify the association between parameters of bone mass measured by dual energy X-ray absorptiometry (DXA) and quantitative ultrasound (QUS) of proximal phalanges in children adolescents with c...