Bone Abstracts

Background: Osteoporosis is common in subjects with Duchenne muscular dystrophy (DMD). Studies in paediatric DMD identified a high frequency of fragility fractures but there are no studies in the adult population. Recent updated international standards of care (2018) for children and adults with DMD recommend the following for bone monitoring:- Lateral thoracolumbar spine x-rays to screen for vertebral fracture (1–2 yearly if on glucocorticoid; 2&#1...

Objective: Bone and muscle deficits are observed in patients with Crohn’s disease (CD). High-impact exercise (HIE), such as jumping based exercise, can provide hypertrophic and osteogenic stimulus, however to date there have been no studies of HIE in CD. This study aimed to assess the acceptability and feasibility of participating in HIE in adolescents and adults with CD.Methods: Two anonymous questionnaires surveyed adolescents and adults, respecti...

Objectives: To examine the association of gastrointestinal (GI) events and osteoporosis (OP) therapy initiation patterns among postmenopausal women following a diagnosis of OP from a large health plan in Israel.Methods: Women aged ≥55 years were included in the analysis if they had ≥1 OP diagnosis (ICD-9 733.0X) (date for first OP diagnosis was index date), no estrogen use, no diagnosis of Paget’s disease or malignant neoplasm. OP treatm...

Objective: To estimate the proportion of patients who experienced cardiovascular (CV) events or were at risk for CV events prior to initiation of strontium ranelate among osteoporotic (OP) patients.Methods: This was a retrospective database analysis using the Clinical Practice Research Datalink (CPRD) database. Patients were included if they had ≥1 prescription (Rx) of strontium from 9/1/2008 to 8/31/2013, were aged ≥50 years as of the index ...

Introduction: Children with chronic kidney disease (CKD) who suffer from growth retardation have usually normal circulating GH but low IGF1, suggesting GH resistance. We have previously shown in growth retarded CKD rats an increase in suppressor of cytokine signaling 2 (SOCS2) levels, a key negative regulator of GH signaling. SOCS2 spontaneously mutated (HG) mice show an exaggerated body growth and increased bone mass. We investigated growth and GH receptor (GHR) signaling in ...

Periosteum contains mesenchymal progenitors and is essential for fracture healing. Signaling mechanisms governing periosteal reaction to injury remain largely unidentified. We previously investigated how PI3 kinase signaling affects the skeletal system using CblYF/YF knock-in (YF) mice wherein PI3K signaling is perturbed by abolition of interaction between Cbl, an E3 ubiquitin-ligase/adaptor protein, and p85 subunit of PI3K. YF mice displayed increased bone volume u...

We found that miR-335 is reduced in SBC-5, a human lung cancer (LC) derived cell lines inducing osteoclast formation by expressing RANKL; reviving miR-335 expression in SBC-5 results in decrease of its proliferation, invasion, migration and clone formation in vitro; reviving miR-335 expression in LC model leads to reduction of bone metastasis (BM) in vivo. It was confirmed that miR-335, inhibiting the formation and activity of osteoclasts and reducing the pro...

Tannerella forsythia is a gram-negative, anaerobic, asaccharolytic, fusiform bacterium. The presence of the bacterium is associated with various forms of periodontal disease, including gingivitis, chronic and aggressive periodontitis. The expression of GroEL, a bacterial heat shock protein, increases in stressful conditions such as infection. GroEL is a moonlighting protein that has multiple functions. The aim of this study was to evaluate the effect of T. forsyth...

Ca2+ signaling and NFATc1 activation are essential for RANKL-induced osteoclast differentiation through the induction of Ca2+ oscillation, calcineurin activation, and translocation of NFATc1 into the nucleus. Homer proteins are scaffold proteins that have been proposed to modulate multiple Ca2+ signaling proteins, including inositol 1,4,5-triphosphate receptors, ryanodine receptors, transient receptor potential channels. In this study, we inves...

Objective: To comparing the role of interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-α) in fat and bone communication.Methods: Male wild type (WT) mice, IL-6 knockout (IL-6−/−) mice, and tumor necrosis factor alpha (TNF-α) were fed with either standard diet (SD) or high fat diet (HFD) for 12 weeks. Bone mass and bone microstructure were evaluated by micro-CT. Gene expression related to lipid and bone metabolisms ...