Bone Abstracts

Objective: To examine the bone mineral density (BMD), fracture occurrence and history in a cross-section of subjects with Pelizaeus Merzbacher Disease (PMD).To describe the effect of pamidronate therapy on BMD over time in treated PMD patients.Methods: We examined the medical history, medications, level of ambulation, fracture history and DXA results in 15 boys with PMD. Body sites scanned included whole body (WB) when possible, lu...

Objectives: Examine the effects of a ramped dosage schedule of pamidronate on BMD, fracture rate and location compared to a uniform 5-course regimen. The ramping regimen is intended to alter the tendency for post-treatment fractures to occur at the juncture of pamidronate bands where stress-riser related fractures have been described.Methods: Ten non-ambulatory children (seven females) with neuromuscular disabilities who received IV pamidronate with a ta...

The endocannabinoid system has important effects on bone mass and bone turnover. Mice with targeted inactivation of type 1 (CB1) and type 2 (CB2) cannabinoid receptors develop osteoporosis with increasing age raising the possibility that cannabinoid receptor agonists might protect against age-related bone loss. Since cannabis is the most widely used illegal drug and its main psychotropic component -Δ9-tetrahydrocannabinol (THC)- is an agonist at CB1 and CB2 receptors, we ...

Odanacatib (ODN), a selective and reversible cathepsin K inhibitor was shown to histomorphometrically reduce trabecular (Tb) and intracortical (Ic) bone remodeling while preserving endocortical (Ec) and stimulating periosteal (Ps) bone formation (BF) in monkeys. Here, we investigate the bone site specific mechanism of ODN on bone modeling (Mo) versus remodeling (Re)-based osteons. Rhesus monkeys (13–19 yrs, n=8–11/group) were ovariectomized and treated with ...

Objective: In girls with Rett syndromeDescribe bone mineral density (BMD) and contributing factors in a cross-section of subjects.Examine serial DXA measures.Examine effect of pamidronate on BMD over time.Methods: We reviewed the clinical course, medications, level of ambulation, 25-OH-Vit D levels, fracture history and DXA results in 13 girls with Rett syndrome. Eight subjects had more...

Objectives: i) Describe bone mineral density (BMD) of children with MPS IV (Morquio disease), a rare genetic disorder which produces skeletal deformity, small stature and results in physical limitations such as the ability to walk.ii) Examine fracture history and factors affecting bone health in Morquio.iii) Describe technical issues encountered in assessing BMD by DXA in Morquio.Methods: In this prospective ...

IκB Kinase β (IKKβ), a key component of NFκB signaling, plays an important role in bone disease and cancer. Genetic and pharmacological inhibition of IKKβ/NFκB signaling increase bone mass and protect against ovariectomy- and inflammation-induced bone loss. Here, we describe a previously unknown role of the IKKβ/FoxO3a axis in bone metastasis associated with breast cancer. We observed that IKKβ expression is prevalent in invasive breast ...

Introduction: Mitochondrial dysfunction is associated with several clinical outcomes including diabetes and myopathy and is implicated in the human aging process. We previously showed that the mitochondrial DNA point mutation mtDNA3243A>G is associated with lower BMD and altered bone structure. The aim of this study was to assess bone turnover markers in individuals with the mutation and controls.Methods: We recruited 45 patients (29 female, 16 male)...

Introduction: Due to the ‘greying’ of (industrialized) societies the incidence of osteoporosis and fragility fractures is expected to be increasing. Our aim was to investigate in an elderly population if the incidence of non-vertebral fractures (overall and site specific) has changed after a longer follow-up, and its relation with osteoporosis or osteopenia assessed by bone mineral density (BMD) at baseline.Methods: Incident non-vertebral fract...

see PP383....