Bone Abstracts

Pathophysiological calcification in the vasculature favours cardio- and cerebrovascular diseases. In patients with chronic kidney disease vitamin K metabolites are associated with decreased vascular calcification.We investigated the expression of vitamin K dependent proteins (VKDPs) in vessels and bone to identify differences in expression pattern during atherosclerosis (AS) stages and compare the two tissue profiles.Gene expressio...

Objective: This work investigated the changes of bone hip structural parameters in obese adolescents enrolled in a successful weight loss program.Methods: Thirty-one obese adolescents (age 13.61±1.27) enrolled in a 8-month weight loss program combining physical activity and nutrition were compared with normal-weight (NW) matched peers (age 15.9±0.43). Investigations were performed at baseline and 8 months. Bone geometric and strength indices we...

Phosphorus intake in western countries is high due to abundant consumption of animal protein and also because of the expanding use of highly absorbable food additive phosphate (FAP) salts in food processing. P is essential for hydroxyapatite in bone, but short-term studies have shown that high P, especially FAP, intake has acute negative effects on bone metabolism. In this study, we investigated the associations between dietary P intake and bone turnover markers by using a cro...

Children with cerebral palsy have altered muscle tone and reduced bone mass, which can lead to impaired mobility and function increasing their risk for osteopenia in later life.Objectives: We aimed to evaluate the impact of 20 weeks of side-alternating vibration therapy on muscle and bone health in children with mild-moderate cerebral palsy. METHODS: Twelve participants (7.2±0.5 years; 6 females) were recruited to perform vibration therapy on a Gali...

Objectives: We evaluated role of disease activity and genetic factors in fractures predisposing among juvenile idiopathic arthritis (JIA) children.Methods: Bone mineralization parameters were detected by dual-energy X-ray absorptiometry of lumbar spine L1–L4 in 197 (81 boys and 116 girls) JIA children. Bone biochemical markers included osteocalcin, C-terminal telopeptides, parathyroid hormone (PTH), Ca, Ca++, P, tota...

Bone resorption and deposition occur in a tightly regulated fashion reflecting the coupled activities of osteoclasts and osteoblasts. Several pathological conditions perturb this balance between bone synthesis and resorption, including osteoporosis and skeletal metastases. The uncoupling of remodeling activities contributes to disseminated tumor cells homing to the bone and to tumor growth in bone. Therefore, a reliable marker of bone remodeling would be useful to provide a st...

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Bone resorption and formation occur in a tightly regulated fashion reflecting the coupled activities of osteoclasts and osteoblasts. Several pathological conditions perturb this balance, including osteoporosis and skeletal metastases. In the case of metastases, the uncoupling of resorption and formation activities contributes to disseminated tumor cells homing to the bone and to tumor growth within the bone in highly localized regions. Therefore, a site-specific marker of bone...

Abaloparatide (ABL) is a novel analog of hPTHrP (1–34) in clinical development for treatment of osteoporosis. This study evaluated the long-term effects of ABL on BMD and bone strength in aged osteopenic, ovariectomized (OVX) monkeys. Four groups of ≥9-year-old female cynomolgus monkeys underwent OVX and one group underwent Sham surgery. After a 9-month bone depletion period, increases in bone markers and decreases in BMD by DXA and pQCT were observed for OVX groups...

The microenvironment of osteolytic metastases includes carcinoma cells derived from the primary lesion as well as bone-forming and bone-resorbing cells, namely osteoblasts (OB) and osteoclasts (OC). At this site, both the high glycolysis of cancer cells, and the bone resorption process result in a very acidic milieu. This, in turn, induces the surrounding stroma and OB to secrete pro-inflammatory cytokines and growth factors that promote tumorigenesis and cancer-associated ost...