Bone Abstracts

Context: Anorexia nervosa (AN) occurs predominantly in females, most frequently during adolescence and it is generally associated with amenorrhoea. AN increases the risk for impaired bone health and for low bone mineral density (BMD) by a mechanism which has not been yet well defined.Objective: The study purpose was to further characterize bone metabolism in AN with amenorrhoea, and so with oestrogen deficiencyDesign: AN patients w...

Constant remodeling of extracellular matrix is a hallmark during physiological conditions, such as stem cell differentiation, embryogenesis and tissue repair. Matrix metalloproteinases (MMPs) play a key role in these processes. MMPs and MMP-inhibitors (TIMPs) are responsible for bone formation and bone matrix remodeling and, probably, determinate the level of its turnover. Mesenchymal stem cells derived from dental pulp are multipotent and have the capacity to differentiate, a...

Ankylosing spondylitis is a chronic inflammatory rheumatic disease, characterized by axial pain and osteoproliferation, leading to painful rigidity of the spine and disability. In contrast with this bone formation, bone loss is an early event in this disease, and an increased vertebral fracture risk (but not non-vertebral fracture risk) has been reported in these patients.Prospective studies have shown that potent anti-inflammatory drugs, such as anti-TN...

α2C Evidences demonstrate that sympathetic nervous system (SNS) activation causes osteopenia via β2-adrenoceptor (β2-AR) signaling. In a recent study, we showed that female mice with chronic sympathetic hyperactivity due to double knockout of adrenoceptors that negatively regulate norepinephrine release, α2A-AR and α2C-AR (α2A/α2C-ARKO), present an unexpected phenoty...

see P395....

Safety data on zoledronic acid (ZA) administration for osteoporosis suggest potential kidney toxicity; indeed, it is not indicated in patients with impaired renal function. Patients’ clinical monitoring usually includes glomerular filtration rate (GFR) evaluation; no study addressed the issue of the early kidney injury. We evaluated the early (within 3 months) effect of iv ZA on renal function defining the potential role of AKI biomarkers in unveiling subtle damage.<p...

DMAb increases BMD and reduces bone resorption and risk of vertebral, nonvertebral and hip fractures in women with PMO. Transiliac crest bone biopsies in 47 subjects treated with DMAb for 1–3 years showed reduced bone turnover vs 45 Pbo-treated subjects, which reversed on treatment cessation. Since bone turnover reduction is sustained and fracture incidence low over 6 years’ DMAb treatment, we evaluated DMAb’s effects on tissue-level remodelling in the FREEDOM E...

Objective: To investigate i) the analytic stability of PTH in venous blood specimens in serum tubes processed at different time intervals after collection compared to immediately processed blood samples collected in K2EDTA tubes, and ii) whether storage of samples in serum tubes for 5 years at −20 °C had an effect on stability of PTH.Methods: Venous blood samples were collected from ten healthy Caucasian females. One K2EDTA tube and three seru...

Introduction: The purpose of this study was to evaluate whether daily treatment with 400 IU vitamin D3 was sufficient to maintain 25-hydroxyvitamin D (25(OH)D) concentrations above 60 nmol/l over a 3-year period. In addition, the study aimed to clarify if any differences existed in serum 25(OH)D between pre-supplemented women and women who already had serum 25(OH)D above 60 nmol/l at screening.Methods: Serum samples drawn from 251 postmenopaus...

Background: The mineral content of the skeleton in children may be estimated by a number of methods including DXA-scanning, ultrasound, pQCT-scanning and from plain radiographs. Recently, a new method offering an estimating of the bone mineral content in children based on computerised assessment from hand radiographs has been introduced. The new measure is named bone health index (BHI) and expresses the mineral content in the metacarpal bones divided by the volume of the same ...