Bone Abstracts

Vascular calcification has a marked impact on arterial heterogeneity and plaque stability. Based on a cohort of 116 patients (carotid and femoral endarterectomies), the aim of the present study was to determine the influence of the bone-like vascular calcification and of osteoprotegerin (OPG) on plaque stability.Seventy-three carotid and 43 femoral plaques along with plasma were harvested and analyzed in a single center study. The presence of osteoid met...

Human adipose-derived stromal cells (ASCs) exhibit strong plasticity and proliferation potentials. In addition, ASCs are easy to harvest and are found at high frequency in adipose tissue samples. This gives us opportunities for their use in bone regeneration therapy. We thus evaluated the bone formation potential of ASCs in vitro and in vivo.ASCs were isolated from subcutaneous adipose tissue (following Local Ethical Guideline and after...

Biographical DetailsDr Brendan Lee is the Robert and Janice McNair Endowed Chair in Molecular and Human Genetics, Professor and Interim Chairman of the Department of Molecular and Human Genetics at Baylor College of Medicine. Dr B Lee co-directs the joint MD Anderson Cancer Center and Baylor College of Medicine Rolanette and Berdon Lawrence Bone Disease Program of Texas, and the Baylor Co...

Background: Dual-energy X-ray absorptiometry (DEXA) is the gold standard used for measuring bone mineral density and such readings are currently used to predict osteoporosis and osteoporotic fractures. However, no similar prediction model has been developed to identify the age that a patient will become osteoporotic based on DEXA scanning.Objective: The aim of this study was to develop a mathematical model to determine the TTO based on two or more DEXA s...

We have previously shown a high prevalence of vitamin D inadequacy (serum 25-hydroxyvitamin D (S25(OH)D) <50 nmol/l) in adolescents (14–18 years) in the UK (51°N)(1). It is well recognised that vitamin D deficiency (S25(OH)D <25 nmol/l) increases the risk of rickets and impaired growth in adolescents, however the optimal vitamin D status for bone health is debated. The aim of this study was to investigate the effects of vitamin D status on bone hea...

Suppression of parathyroid hormone (PTH) has been suggested as a potential biochemical outcome measure for determining the optimal serum 25-hydroxyvitamin D (S25(OH)D) concentration for bone health in adults. However, in adolescents increases in PTH may not be driven by the same mechanisms and may not be detrimental to bone health. Adolescent studies have provided a wide range of estimates of the S25(OH)D concentration at which PTH plateaus (40–90 nmol/l), with some repor...

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Introduction: The purpose of this study was to quantify fracture risk associated with areal bone mineral density (BMD) in older men.Methods: In this prospective analysis we followed 620 men aged 60–93 years (median 74.3 years) for a median 6.4 years, after baseline BMD assessments (performed 2001–2006) as part of the Geelong Osteoporosis Study. Based on WHO criteria, 33.5% had normal BMD at the femoral neck, 57.6% were osteopenic and 8.9% osteo...

Antenatal glucocorticoid (GC) injections are not only used to enhance fetal lung maturation in preterm children but also for the treatment of maternal conditions such as autoimmune diseases or infections. Animal models and clinical studies suggest that the regulation of the hypothalamic–pituitary–adrenal axis is altered in the offspring of GC-treated mothers with increased sensitivity to stress.Objective: The aim of this study is i) to define t...

Objective: Autism Spectrum Disorder (ASD) is associated with lower bone mass in children. Physical activity and nutrition influence bone pathophysiology, and differences in these lifestyle factors are observed between children with vs. without ASD; however, whether these factors contribute to bone differences is unknown. We examined if: 1) differences existed in bone mineral density (BMD), content (BMC), or bone geometry in boys with vs without ASD and 2) whether physical acti...