Bone Abstracts

Objectives: Type 2 diabetes mellitus (T2DM) is associated to an higher risk of fractures despite a normal or increased bone mineral density measured by dual-energy X-ray absorptiometry (DXA).The purpose of this 3-years longitudinal study was to assess the changes of quantitative ultrasound (QUS) parameters in a group of postmenopausal women with T2DM and in healthy controls.Materials and method: The analyses were performed on a gro...

Objectives: Osteogenesis imperfecta (OI) is a bone disease mainly caused by collagen type I mutations and characterized by bone fragility. No definitive cure is available and the search for novel treatments is necessary. The small teleost D. rerio is particularly appealing for drug screening approaches. A zebrafish OI model (Chihuahua) carrying in heterozygosis the G574D substitution in the α1 chain of collagen type I is available. To use this model for ...

Multiple myeloma is an incurable neoplastic disorder of plasma cells, which invade the bone marrow, secrete monoclonal immunoglobulins, and induce bone lesions, hypercalcemia, anemia and renal failure. The development of myeloma relies on vicious interactions with the bone microenvironment, a deeper knowledge of which is needed to identify prognostic markers and potential therapeutic targets. To achieve an unbiased, comprehensive assessment of the extracellular milieu of myelo...

The quantitative ultrasound (QUS) of the proximal phalanges has been used for the indirect evaluation of bone status. Furthermore, the relative simplicity and non-exposure to radiation, presents advantages for the use of QUS compared to other methods in children and adolescents. The aim of this study was to determine the influence of age and pubertal development on Amplitude Dependent Speed Sound (AD-SoS) assessed by QUS of proximal phalanges in girls and boys aged 10–15 ...

MicroRNAs are important regulators of gene expression with documented role in bone metabolism and osteoporosis. Moreover, the use of miRNAs constitutes potential therapeutic targets. Our aim was to identify miRNAs differentially expressed in fractured compared to healthy bone. Additionally, we performed a miRNA profiling of primary osteoblasts to assess the origin of the differentially expressed miRNAs. Total RNA was extracted from fresh femoral neck trabecular bone from women...

Multiple Myeloma (MM) is a malignancy of Plasma Cells (PC), characterized by severe osteolytic lesions but poor 99Tc-MDP uptake in bone scans due to osteoblast inhibition. We hypothesized that high demands for membrane biosynthesis in tumour PC would enhance monocarboxylic acid anabolism and uptake, which could be exploited for treatment and molecular imaging. Here, we tested the efficacy of clinically available 11C-Acetate PET to detect myeloma and quant...

Numerous studies have reported beneficial effects of multipotent mesenchymal stem cells (MSCs) in tissue repair and regeneration. These multipotent cells can be isolated from many different adult tissues and give rise to different cell lineages. The most well-characterized source for adult stem cells is still adult bone marrow, however in the past decade, subpopulations of stem cells have been isolated from dental tissues. Dental pulp has been identified as a promising source ...

Calcium (Ca) and vitamin D nutritional status effects on oral health were evaluated in 85 healthy women aged between 20 and 30 years (24.6±0.4). They attended the first year of the Nutrition Carrier at the Private University (ISALUD, Buenos Aires, Argentine). Usual Ca intake (CaI) was determined by a food-frequency questionnaire that included consumption of dairy products and calcium-enriched foods. Blood samples were obtained in a fasting state in winter: the end of Augu...

Fractures in infancy raise the spectre of child abuse; it has been suggested that lack of vitamin D could result in bone abnormalities that could predispose to fractures. We utilised a mouse model system to investigate whether vitamin D deficiency in utero alters early bone growth and development.C57BL/6 female mice received vitamin D deficient or replete diet for 6 weeks, then mated and continued on their respective diets until weaning. Pups were culled...

Background: Fracture incidence rate and growth according to different glucocorticoid (GC) regimen in Duchenne Muscular Dystrophy (DMD) is currently unknown.Objective: To determine the extent of skeletal morbidity and the influence of GC regimen on fracture incidence rate and growth in a contemporary cohort of DMD in the UK.Method: Clinical details of 832 boys with DMD in the North Star database (2006–2015) from 23 centres were...