Bone Abstracts

Despite the improvement in bone’s molecular, metabolic and live-cell imaging, histological investigation remains most crucial in bone biology for diagnostic and research purposes. Therefore, fixation of bone samples – especially for electron microscopy investigation – is critical to the ultrastructural analysis. Up to date, chemical fixation of bone tissue is performed at room temperature resulting in a compromised ultrastructure of bone sample. In this study, w...

Epidemiological studies suggest that patients using proton pump inhibitors (PPIs) have increased fracture risk. We have previously shown that H+/K+ATPase beta-subunit knockout (KO) mice have reduced BMD, BMC and mechanical bone strength compared to WT. Like users of PPIs, these mice have elevated serum gastrin levels due to high gastric pH. We wanted to study whether elevated gastrin influences bone quality in these mice.Female KO and WT mice aged 6 week...

Objective: We evaluated the effect of risedronate on BMD and bone turnover markers in HIV infected osteoporotic males, according to their gonadal status.Methods: 41 HIV patients treated with highly active anti-retroviral therapy (HAART) were followed for 24 months and divided into two groups: patients with osteoporosis or osteopenia with fractures (Group A, n=20) and those without (Group B, n=21). Group A and B were fur...

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Introduction: Micro-RNAs (miRNAs) are important post-transcriptional regulators. By binding to complementary RNA strands, they affect mRNA levels and/or mRNA translation. We have previously identified ~90 miRNAs with significant expression levels, with a subset of miRNAs exhibiting interindividual and/or gender differences in expression. In the present project, we have investigated the impact of treatment of parathyroid hormone (PTH) and dexamethasone (DEXA) on global miRNA ex...

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...

Background and aims: Cirrhosis and chronic pancreatitis (CP) are accompanied by inflammation and malnutrition. Both conditions may affect bone metabolism negatively and facilitate bone fractures. The objective of this study was to evaluate the risk of fractures among patients with CP or cirrhosis and the impact of fat malabsorption on fracture risk among patients with CP.Methods: Using the Danish National Patient Register, we did a retrospective cohort s...

Background: Bone marrow edema (BME) is a localised bone lesion. We hypothesize that structural bone alterations increase the susceptibility to BME. Aim of this study was to analyse bone micro structure, bone mineral density (BMD) and serum fasting bone turnover marker (BTM) values in patients with BME.Methods: We compared 14 nonosteoporotic patients (43.7±19.2 years) with atraumatic BME of lower limb to 35 age-matched healthy controls (HC). HR-pQCT ...

Background: Osteogenesis imperfecta (OI) as a rare disease is characterized by reduced bone mass, increased fracture rate, bone deformities and skeletal pain.Currently patients are treated with i.v. bisphosphonates regardless of the underlying mutation.Recently the gene causing OI type VI was described (SERPINF-1, altered RANKL-pathway). This leads to a new understanding of the underlying pathophysiology and offered a new therapeut...