Bone Abstracts

Bisphosphonates (BPs) are widely used as antiresorptive drugs. However, one of most potent BPs, zoledronic acid (ZA) can cause BP-related osteonecrosis of the jaws (BRONJ) with a poorly understood pathophysiology. The aim of this study was to find a clue for the development of BRONJ by evaluating the cytotoxic effects of ZA on osteoblasts and examining the action mechanism of ZA on osteoclast differentiation. Jaw bone osteoblasts (JB-OBs), long bone osteoblasts (LB-OBs), and b...

Bone remodelling is maintained by a balanced activity of osteoclasts and osteoblasts. Alterations in this cross-talk result in bone pathological conditions. High bone mass defines a complex and heterogenous genetic condition characterized by increased bone density. In particular, osteopetrosis is a genetic condition of high bone mass caused by impairment in osteoclast generation or function. Molecular analysis of human osteopetrosis has allowed the identification of novel gene...

Bone regeneration and fracture healing processes are impaired in post menopausal osteoporosis which is induced by estrogen deficiency. Though agents like BMPs and PTH have been shown to promote bone regeneration but are associated with undesirable side effects. There is a need for new agents that enhance bone regeneration and repair.The aim of this study was to evaluate the bone regenerative capacity of medicarpin in the osteoporotic rat model. Cortical ...

Objective: GH through IGF1 plays an important role in both bone growth and mineralization. This cross-sectional study was carried out to evaluate the relationship between serum IGF1 concentrations and dual energy X-ray (DXA) measured total body less head (TB) bone area (BA), lean body mass (LBM) and bone mineral content (BMC).Methods: One hundred and nineteen children (B=70, age =7.3–15.6 years) were studied for their anthropometric paramet...

Background: Several bone metabolic pathways are disrupted in diabetes mellitus (DM), leading to reduced bone mass. Increased fracture risk and elevated Dickkopf-1, which is an inhibitor of the Wnt/b-catenin bone metabolic pathway, have been documented in adult patients with type 2 DM. No relevant data exist on childhood type 1 DM (T1DM).Objective and hypotheses: We aimed at studying plasma Dickkopf-1 concentration in children and adolescents with T1DM an...

Objectives: Studies have reported prevalence of vitamin D deficiency in Indian children with adequate sunlight exposure (Harinarayan, 2008). The objectives of our study were to A) examine the prevalence of vitamin D deficiency in children with adequate sunlight exposure in a semi-rural setting in Western Maharashtra (18(°N), India and B) explore the association of serum 7-Dehydrocholesterol reductase (7-DHCR) with the serum vitamin D levels.Methods:...

Background: Prader Willi syndrome (PWS) is a genetic disorder characterized by severe hypotonia in infancy, hypogonadism, dysmorphic features, early onset obesity and mild mental retardation.Although hip dysplasia occurs in 10–20% in patients with PWS, hip dislocation requiring surgery is seen rarely. To our knowledge, surgical treatment of hip dislocation in PWS has not been reported before.We present a case with PWS and hip ...

Low bone mineral density (BMD) and an increased rate of both peripheral and vertebral fractures have been observed in patients with Duchenne muscular dystrophy (DMD). However, studies specifically addressing bone metabolism, BMD and fractures in this disease are still very few.Our ongoing multicenter, prospective study is aimed to identify the characteristics of the DMD boys with a higher risk of bone loss and fractures, through the evaluation of bone tu...

Dysosteosclerosis (DSS) is the rare osteopetrosis (OPT) distinguished by metaphyseal osteosclerosis with relative radiolucency of widened diaphyses and platyspondyly. In 2012, mutations in the SLC29A3 gene were discovered to cause DSS.Here, we report a new case of DSS presenting with severe anemia and having a unique homozygous mutation in SLC29A3.Our patient was the 3rd child of consanguineous Turkish parents. She present...

Background: Despite the large amount of studies published on the association of vitamin D deficiency with higher incidence of falls and fractures, the threshold for a sufficient serum 25(OH)D concentration remains subject to a considerable debate. There has also been no clear consensus on the assessment and treatment of vitamin D deficiency.Objective: To examine the prevalence of vitamin D deficiency and/or insufficiency and its impact on calcium/phospha...