Bone Abstracts

Nacre, or mother of pearl, is a promising natural biocompatible biomaterial consisting of aragonite (97%) and of organics (3%) and capable to increase the cell osteogenic activity. It has been established that osteoarthritic osteoblasts present a mineralization defect and, to date, only a few molecules (vitamin D3 and bone morphogenetic protein2) could improve the mineralization potential of this cell type. In this context, we evaluated the impact of nacreous molecules on the ...

Objectives: Osteogenesis imperfecta (OI) is a bone disease mainly caused by collagen type I mutations and characterized by bone fragility. No definitive cure is available and the search for novel treatments is necessary. The small teleost D. rerio is particularly appealing for drug screening approaches. A zebrafish OI model (Chihuahua) carrying in heterozygosis the G574D substitution in the α1 chain of collagen type I is available. To use this model for ...

Nacre is able to induce bone-forming cells mineralization, and gains widespread interest in bone regeneration. While, the osteoinductive compounds are not identified yet. The nacre extract, ethanol soluble matrix (ESM), was proven having the capacity to induce the mineralization of mouse MC3T3-E1 cells and to restore mineralization defect in human osteoarthritic osteoblasts. Being tested on the two cells, ESM could induce the formation of mineralization nodules, identified as ...

Background: Congenital multiple hormone deficiency (CMHD) is a rare condition caused by mutations in transcription factors involved in pituitary ontogenesis1. Incidence of mutations in POU1F1 gene in results between 3.8 and 7.7%2. POU1F1 gene mutations lead to somatolactotroph and thryotroph deficiencies. Brain MRI can be normal or shows pituitary hypoplasia without extrapituitary anomalies.Presenting problem: We describe the growth...

Background: Weyers acrofacial dysostosis (WAD, OMIM 193530) is a rare autosomal dominant disease, characterized by mildly short stature, postaxial polydactyly, nail dystrophy and dental anomalies. WAD should be distinguished from Ellis-van Creveld syndrome (OMIM 225500), a similar but more severe disease, comprising chondrodysplasia, orofacial anomalies and, in a proportion of patients, cardiovascular malformations. Both diseases are caused by mutations in either EVC or EVC2<s...

Introduction: Bisphosphonates gain increasingly greater significance in treatment oncologic diseases with bone metastasis. However, a lot of articles have lately been published in dental and oncological journals on jaw osteonecrosis (ONJ) associated with long-term ingestion of bisphosphonates. Besides extension of clinical recommendations for zolendronate use, most commonly referred to in connection with ONJ, for treatment of Paget’s diseaseand other disturbances of bone ...

Objective: Serotonin is a neurotransmitter with multiple functions in the gastrointestinal tract and CNS. Recent animal studies indicate that serotonin regulates bone mass and remodelling. In humans, a handful of studies have shown decreased bone mineral density (BMD) in adults treated with selective serotonin reuptake inhibitors (SSRI) for depressive symptoms. Although SSRI’s are prescribed in pediatric practice, there are few studies examining the effect of SSRIs on bon...

Objective: Vascular calcification contributes to the pathogenesis of atherosclerosis, hypercholesterolemia, end stage renal disease, and diabetes, and is caused by genetic ablation of matrix Gla protein (MGP) in mice. Genetic ablation of MGP in mice results in excessive calcification of the vessel wall associated with a chondrocyte-like trans-differentiation in smooth muscle cells (VSMCs). Canonical β-catenin signaling is activated in the calcified arterial Mgp&#8722...

Barrier membranes have been extensively used in dentistry to prevent soft tissue down-growth into the bone defects and to promote alveolar ridge augmentation. Previous studies of our group showed that the Poly(vinylidene-trifluoroethylene)/barium titanate composite (PVDF) enhances both the in vitro osteoblastic differentiation and the in vivo bone repair compared with a commercially available polytetrafluoroethylene (PTFE) membrane. As bone formation may be regulated ...

Purpose: Research suggests that dancers are at higher risk of developing low bone mineral density (BMD) compared with the general population. However, the associated factors contributing to low BMD in dancers are not fully understood. We aimed to assess the association of single-nucleotide polymorphisms (SNPs) in the Wnt/β-catenin and oestrogen receptor (ER) signalling pathways with low BMD in dancers.Methods: A genetic association study was conduct...