Bone Abstracts

Background: Hypoxia induces mesenchymal stem cells (MSCs) proliferation but results in a population with impaired osteogenic differentiation potential. Bone healing of tibial lengthening is enhanced by hyperbaric oxygen therapy. However, little is known about the effects of HBO on the Wnt signaling pathway in MSCs.Materials and methods: MSCs were cultured in complete medium and the osteogenic groups were cultured in osteogenic induction medium. Control c...

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Glucocorticoids (GCs) are widely used to treat chronic inflammatory diseases such as rheumatoid (RA) and lead to multiple side effects including glucocorticoid induced osteoporosis (GIO). Our work challenges the dogma that transrepression of pro-inflammatory genes by the glucocorticoid receptor (GR) is solely responsible for reducing inflammation, whereas transactivation of genes is causing side effects.Using conditional and function selective mutant mic...

Background: The clinical presentation and the clinical phenotypic characterization and the natural history of Fibrodysplasia Ossificans Progressiva (FOP) is diverse and the natural history of the disease is to certain extent different from one patient to another.Methods: In a series of eleven patients age range from 0 to 16 years (eight girls and three boys), variable clinical presentations were the landmark of these patients. At birth, all our patients ...

Introduction: Granulocyte colony-stimulating factor (G-CSF) is widely used to mobilize peripheral blood stem cells (PBSC) and enable PBSC collection by apheresis. Although bone pain is a common adverse event following G-CSF treatment, little is known on its effect on bone metabolism.Methods: Markers of bone turnover (OC, osteocalcin, β-CTx, bALP, C-terminal telopeptide of type I collagen, bone specific alkaline phosphatase, TRAP, tartrate resistant ...

Objectives: To assess safety and clinical efficacy during 1–34 parathyroid hormone treatment (1–34-PTH) in real clinical practice; to describe fracture outcome after 1–34-PTH discontinuation in real clinical practice.Methods: We performed an observational study in real clinical practice of all consecutive severe osteoporosis (sOP) patients referred to our Rheumatology Department from Feb’10 until Jan’14. All patients were referre...

Background and objectives: Fracture in rheumatoid arthritis (RA) patient is more frequent than general population. One of the important reasons is use of glucocorticoid (GC) for treatment of RA. In this study, we aimed to identify the effect of GC on fracture of different site.Methods: Among RA patients ≧19 years, we established a retrospective cohort using Korean national healthcare claims database from Jan 2010 to Dec 2010, and then followed up unti...

Over 80% of Quebec woman initiate breastfeeding, and rates of exclusive breastfeeding at 6 months doubled from 2003 (9.7%) to 2009 (19.0%). To prevent deficiency, current recommendations for these infants include 400 IU/day of vitamin D. For 20 years, Quebec has offered a program of free vitamin D supplements through its public medication insurance plan (RAMQ).Objective: Program evaluation over the last decade.Methods: This is a re...

The relationship between vitamin D status and lean mass accretion in young children is not well understood.Objective: To explore vitamin D status in relation to lean mass outcomes over 12 mo in children 2–8 years.Methods: This was a secondary analysis of trial data (clinicaltrials.gov: NCT02097160, NCT02387892) in Montreal, Canada. Children consumed their normal vitamin D intake for 6 mo (Apr–Oct 2014, n=39) and ...

Background: There is still limited information on changes in growth especially segmental growth and bone mass of glucocorticoid(GC) treated boys with Duchenne Muscular Dystrophy (DMD).Objectives: To evaluate changes in growth and bone mass in GC treated boys with DMD.Methods: Retrospective study of 15 boys with DMD treated with GC, median age 7.6 years (4.1, 15.5) who had repeated DXA scan for clinical monitoring of bone health, me...