Bone Abstracts

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Abnormal tissue levels of certain trace elements such as Zinc (Zn) were reported in various types of cancer. Little is known about the role of Zn in osteosarcoma.Using confocal synchrotron radiation micro X-ray fluorescence analysis, we characterized the spatial distribution of Zn in high-grade (G3) sclerosing osteosarcoma of nine patients (4 f/5 m; 7 knee/1 humerus/1 femur) following chemotherapy and wide surgical resection. The study was done in accord...

Contemporary elemental imaging techniques are greatly contributing into the bone research. Synchrotron radiation induced confocal micro x-ray fluorescence technique (SR-μXRF) was employed for the analysis, being the most powerful and sufficient tool in detection and characterization of trace element distributions in bone tissue. Manganese (Mn), as a potential contributor into the mechanisms of calcium incorporation into bone tissue is in the spotlight of research. Further...

Disorders of glucose metabolism are associated with adverse skeletal effects. Hyperglycemia impairs the function of osteoblast-like cells but the mechanisms underlying glucose toxicity are poorly understood. In this study we determined the effect of elevated extracellular glucose levels on the proliferation and osteogenic differentiation of mesenchymal stromal cells (MSC).Bone marrow cells were isolated from rat long bones, plastic-adherent MSCs were enr...

Primary hyperparathyroidism is extremely rare in childhood and adolescence. Here we report a clinical case of a 15-year-3-month-old boy who began 2 years before with pain in his knees, genu varum, and fatigue. Physical examination showed severe genu valgum with an inter-malleolar distance of more than 30 cm. Biochemical tests showed hypercalcemia (12.2 mg/dl), hypophosphatemia (2.3 mg/ dl), hypercalciuria (6.4 mg/kg per day), high alkaline phosphatase (2812 IU/l), low 25-hydro...

It is well known that osteoporotic fragility fractures are an important risk factor for subsequent new vertebral and non-vertebral fractures. Many countries published recommendations to prevent fractures. Also in Italy the Minister of the Health highlighted the importance to prevent osteoporosis and the subsequent fractures, without practical instructions on the management of patients with fragility fractures in the daily clinical practice. Up to date there is no standardized ...

Objective: Cystinosis is a rare lysosomal storage disorder caused by loss-of-function mutations of the CTNS gene, encoding for cystinosin symporter that mediates cysteine efflux from lysosome. ~95% of cystinotic patients display nephropathic Fanconi’s syndrome, short stature, osteopenia and rickets. In this study we evaluated whether the absence of cystinosin primarily affects bone remodeling activity.Methods: We analyzed bone phen...

Osteogenesis Imperfecta (OI) is in most cases a congenital disease of collagen. The mutations have been reported in COLIA1 and COLIA2 genes, localised to chromosomes 17 and 7 respectively. The incidence at birth is 6–20/100 000. Children and youths with OI often display a complex and heterogeneous picture with fragile skeleton, fractures, curvature in the long bones, short stature, pain and limitations in mobility and everyday activity. The impact of those factors for the...

Introduction: Osteogenesis imperfecta (OI) is a genetic disorder which mainly affects the collagen in the bone mass with fractures and deformities as the main symptoms. In OI there is a great variation in dysfunction related to the disease. Mobility and activities related to mobility are often most difficult. The objective for this study was to find a relevant, valid and reliable instrument to assess the children’s activity capability.Method and par...

Background: Current extension in the usage of growth hormone therapy (GHT) has increased the prevalence of bone complications. Legg Calvé Perthes disease (LCPD) is characterized by idiopathic avascular necrosis of the proximal femoral epiphysis. More frequently in boys between 4 and 8 years, LCPD is of unknown ethology. An increased incidence has been stated in case of GH deficiency. There is increasing data that children with LCPD may have a more widespread skeletal diso...