Bone Abstracts

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Introduction: Perthes disease (PD), idiopathic femoral head avascular necrosis, often results in deformity. The underlying cause is unclear and long-term function is directly related to the roundness of femoral head. Current treatment include mechanical treatments and various surgical procedures, which are therapeutic but can’t prevent collapse. A multicentre, prospective, randomised controlled trial of 12 months zoledronic acid (ZA) in children with PD was conducted. We ...

β-tricalcium phosphate (β-TCP) biomaterials have been approved for the repair of osseous defects. However, in large defects, the substitution of biomaterial by authentic bone is inadequate to provide sufficient long-term mechanical stability. We aimed to develop composites of β-TCP ceramics and receptor activator of nuclear factor κ-B ligand (RANKL) to enhance the formation of osteoclasts thereby stimulating material resorption. RANKL was immobilized on &#9...

Recombinant human parathyroid hormone (rhPTH) (1–84) is currently being developed as PTH replacement therapy for patients with hypoparathyroidism. Because rhPTH(1–84) is administered subcutaneously, we compared the pharmacokinetic profile of PTH(1–84) and the calcemic response following S.C. rhPTH(1–84) injection in thigh and abdomen.In this phase 1, open-label, three-way crossover study, healthy postmenopausal women received three ra...

Objective: Currently, majority of the osteoporotic patients are not diagnosed i) a new ultrasound based device (Bindex) has been recently introduced for osteoporosis (OP) screening and diagnostics at primary healthcare ii) Bindex measures cortical thickness and determines parameter called density index (DI). Thresholds for DI in OP assessment have been determined in Finnish-Caucasian (F-C) population (n=448) along the International Society of Clinical Densitometry (IS...

Background: 1α-hydroxylase is a mitochondrial P450 enzyme critical to the synthesis of active calcitriol from the pro-hormone 25(OH) D. Multiple different mutations in the CYP27B1 gene have been identified that abolish or reduce 1α-hydroxylase enzymatic activity resulting in vitamin D dependent rickets type 1. Children with 1α-hydroxylase deficiency present with a clinical picture of joint pain and deformity, hypotonia, muscle weakness, growth failure and someti...

MicroRNAs (miRNAs) are small non-coding RNAs that have emerged as critical post-transcriptional regulators of gene expression. There is increasing evidence that miRNAs play an important role in osteoblast commitment and differentiation. The main aim of this study was to identify and characterize novel microRNAs regulating osteoblast functions. We report the role of mmu-miR-1187 in osteoblast differentiation and the mode by which it regulates osteogenesis. MicroRNA profiling of...

Objectives: The aim of this study was to evaluate and assess the change in bone mineral density in OI children treated with BPs at Chris Hani Baragwanath Academic hospital (CHBAH), South Africa.Methods: Medical files of 104 OI patients who were seen at Metabolic Bone clinic from 01 January 2006 till 31 December 2015 were reviewed. DXA measurements were available on 33 patients that received bisphosphonates from baseline and during therapy at three time p...

The bone organ integrates the activity of bone tissue, bone marrow, and blood vessels and the factors ensuring this coordination remain ill defined. Bone sialoprotein (BSP) is with osteopontin (OPN) a member of the small integrin binding ligand N-linked glycoprotein (SIBLING) family, involved in bone formation, hematopoiesis, and angiogenesis. In rodents, bone marrow ablation induces a rapid formation of medullary bone which peaks by ~8 days (d8) and is blunted in BSP...

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