Bone Abstracts

Introduction: Activated protein C (APC) plays an important role in the cutaneous healing of chronic wounds arising from orthopaedic surgery and has cytoprotective and anti-inflammatory properties which may also assist bone repair. The aim of this study was to examine whether APC could directly influence osteoblasts and increase bone formation in a rodent model.Methods: Proliferation of MG-63 osteoblast-like cells was quantified by MTT assay and direct co...

Introduction: Using transgenic mice ectopically expressing Hoxa2 all along chondrogenesis, we previously associated the resulting animal phenotype to human idiopathic proportionate short stature. Our analysis showed that this overall size reduction was due to a negative influence of Hoxa2 in the very first step of endochondral ossification. As the molecular pathways underlying this pathogenesis are still unknown, we here tried to identify the impact of Hoxa2 overexpression on ...

Background: Relationships between muscle function and bone have been examined using a range of techniques, with conflicting results. We aimed to determine these associations within an adult population comprising individuals with high bone mass and family controls.Methods: Recruitment was from four UK sites within the high bone mass (HBM) study; cases and unaffected family controls were pooled. Peak ground reaction force and peak power, during a multiple ...

Aim: Osteoporosis and resulting spontaneous fractures in young patients with neurological impairments living outside institutions have not received much attention. The aim of this study was to determine the degree of demineralization in children and teens with such disabilities living in South Lebanon, an under privileged region.Subjects and methods: We reviewed 40 patients attending outpatient clinics in a referral rehabilitation center in South Lebanon...

Objective: To assess the relationship between thyrotoxicosis and osteoporotic fractures in men and women.Design: Register-based cohort study in patients with a TSH measurement in the region of Funen 1996–2010. All determinations were done in the same lab serving all hospitals and GP practices. Persons with raised TSH or a history of thyroid/pituitary disease were not included.Results: The study population consisted of 222 138 ...

Osteoporosis pseudoglioma syndrome (OPPGS) is a rare autosomal recessive disorder characterised by congenital or juvenile-onset blindness, severe juvenile-onset osteoporosis, and skeletal fragility. OPPGS is caused by loss-of-function mutations in the LRP5 gene, a member of the LDL receptor family. It activates the canonical Wnt/β-catenin pathway, regulating osteoblastic bone formation. We investigated a 40-year-old Caucasian male presenting with congenital blind...

Postmenopausal women with forearm fracture have higher cortical porosity and lower trabecular density perhaps due to excessive age-related bone loss1. Remodelling becomes unbalanced and rapid only after ~45 years of age. We therefore proposed that bone fragility in premenopausal women with a forearm fracture originates during growth. At metaphyses, trabeculae emerging from the periphery of the growth plate form cortex by ‘corticalization’)2. We ...

We have shown that the bisphosphonate pamidronate (P) given to children <10d post-burn prevents resorptive bone loss and muscle protein breakdown. We have also shown in vitro that Ca modulates the inflammatory response by altering mononuclear cell chemokine production. We hypothesized that P affects muscle protein breakdown by altering cytokine or chemokine concentration directly or indirectly by lowering blood ionized (i) Ca. We retrospectively analysed biomarker...

Objective: The significance of low alkaline phosphatase (ALP) is often not recognised by clinicians. It is the hallmark of hypophosphatasia and this oversight leads to delays in diagnosis, inappropriate treatment and potentially harm. Using the standard that an abnormal result should be recognised by the clinician and the potential cause and need for further investigation documented in the medical records we conducted an audit of our practice at the Royal National Orthopaedic ...

Background: Mutations in SATB2 have been described in association with a unique phenotype known as SATB2-associated syndrome (SAS). This condition is characterised by severe intellectual disability affecting speech development, behaviour, facial features and dental anomalies. Skeletal features and osteoporosis have been reported in older individuals (aged 15–36), in association with point mutations. We report a 24-year-old man with a SATB2 misse...