Bone Abstracts

Hip osteoarthritis is a cause of significant morbidity to people and their canine companions. Medical management is frequently insufficient, leading to surgery to relieve pain and regain mobility. Hip replacements are not without potential complications, including loosening and infection. Currently, there is a focus on uncemented implants to decrease these problems, however these rely on the biology of the femur for osseointegration and long-term stability. It has been previou...

Osteoclasts are the major bone resorbing cells, essential for bone turnover and development. Human osteoclasts can be generated in vitro by stimulation of peripheral blood mononuclear cells (PBMCs) with M-CSF and RANK-L. Seeding fully differentiated osteoclasts onto mineralized surfaces facilitates the analysis of molecular interactions between the osteoclast and the mineralized matrix.Currently, a widely used protocol for harvesting osteoclasts...

Background: Osteoclasts (OCs) are bone-degrading cells that differentiate from the monocyte/macrophage lineage. In human, three monocyte subsets have been identified: classical, intermediate and non-classical monocytes. We have previously demonstrated that comparable numbers of OCs can be generated from these subsets on plastic, but that the number of OCs significantly differs when the monocytes are cultured on bone. It is plausible that the observed differences are associated...

Few interventions directly compare equivalent calcium and vitamin D from dairy vs supplements on the same bone outcomes.Objectives and Methods: Using 41Ca tracer techniques, determine if 4 servings/d of dairy foods reduces Ca excretion more than an equivalent amount of Ca and vitamin D from supplements. Secondary objective was to evaluate the time course for change in Ca excretion.Design: In this crossover trial, postmen...

Introduction: Femoral neck fractures and trochanteric fractures are two major types of hip fractures. The BMD changing or hip strength analysis (HSA) of the two type fractures may be different. No research had focused on a large sample of Asian people. This study investigated the differences in BMD and morphologic features of the two type hip fractures of elderly Asian people from QCT.Methods: A total of 279 elderly Chinese patients with hip fractures du...

Low bone formation is considered to be the main feature in osteoporosis associated with cholestatic and end-stage liver diseases. Previous studies have demonstrated the deleterious consequences of retained substances such as lithocholic acid (LCA) and bilirubin (Bil) on osteoblastic cells. These effects are neutralized by ursodeoxycholic acid (UDCA). To gain new insights into cholestatic-induced osteoporosis, we have assessed the differential gene expression of osteoblastic ce...

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...

Fibrodysplasia ossificans progressiva (FOP) is a rare debilitating genetic disease characterized by abnormal progressive heterotopic endochondrial ossification of soft tissues. FOP results from mutations in the intracellular domain of the type I BMP receptor ACVR1 (ALK2) the most common of which is R206H. FOP mutations alter the sensitivity of ACVR1 to Activin A from an antagonist to an agonist. We have previously shown that Activin A is necessary and sufficient for driving he...

Objectives: Differential diagnosis vs. Osteogenesis Imperfecta (OI).Methods: The parents were Moroccan origin, consanguineous. The patient is an 8 year old girl, who was visited for a first time in our hospital in October 2016, presenting a fracture of the left femur, with dramatic bone deformations, with important disability, unable to walk and with growth retardation (weight 15 kg, length: 92 cm). The first registered fracture is at birth, consisting o...

Background: Several short-term studies have been performed in rheumatoid arthritis (RA) reporting a rapid rate of generalized bone loss. Aggressive anti-inflammatory treatment with biologic disease modifying anti-rheumatic drugs (DMARDs) has been shown to reduce the rate of bone loss1. There is a lack of long term follow-up studies.Objectives: To study 10-year changes in generalized bone loss in early RA patients in the biologic treatment era....