Bone Abstracts

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The PTH type 1 receptor (PTH1R) is an important modulator of bone remodeling. In mice, PTH1R ablation in osteocytes produces trabecular bone reduction and impaired calcium homeostasis; meanwhile, its overexpression in these cells promotes periosteal and endocortical bone formation. Osteocytes can translate mechanical stimuli into bone-forming signals. Skeletal unloading induces osteocyte apoptosis and bone loss, whereas mechanical stimuli prevent osteocyte apoptosis through in...

Introduction: Children with chronic kidney disease (CKD) who suffer from growth retardation have usually normal circulating GH but low IGF1, suggesting GH resistance. We have previously shown in growth retarded CKD rats an increase in suppressor of cytokine signaling 2 (SOCS2) levels, a key negative regulator of GH signaling. SOCS2 spontaneously mutated (HG) mice show an exaggerated body growth and increased bone mass. We investigated growth and GH receptor (GHR) signaling in ...

Introduction: Tumor-induced osteomalacia (TIO) is a rare acquired paraneoplastic syndrome which is usually induced by mesenchymal tissue tumor with excessive secretion of FGF23. The misdiagnosis of TIO is frequently seen in clinic. Therefore, this study is aimed to describe the misdiagnosed situation of TIO, explore the possible underlying reasons for missed diagnosis and misdiagnosis through the analysis of 144 TIO patients, and improve clinicians’ awareness of TIO.<...

Background: Surgical treatment of type 2 diabetes, specially in obese patients, has provided good results in the control of blood glucose and Hb1Ac although its effect on bone health is not clear. The aim of this study was to evaluate gene expression of bone remodelling markers in type 2 diabetic Goto-Kakizaki (GK) non-obese rats after gastrojejunal bypass and sleeve gastroplasty, and their relationship with hormonal parameters.Materials and methods: We ...

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...

In a recent randomized controlled trial comparing vertebroplasty (VP) vs conservative treatment (CT) in patients with symptomatic vertebral fractures (VF) we observed the development of severe chronic back pain (CBP) in nearly one quarter of patients. The aim of this study was to evaluate the risk factors related to the development of CBP in these subjects.Methods: We evaluated risk factors including: visual analog scale (VAS) at baseline and during the ...

Ecto-nucleotide pyrophosphatase/phosphodiesterases (NPPs) hydrolyse nucleotide triphosphates to the corresponding nucleotide monophosphate and the mineralisation inhibitor, pyrophosphate (PPi). This investigation examined the role of NPP1 in bone and soft tissue mineralisation using a mouse model lacking NPP1(Enpp1−/−). At physiological pH 7.35, cultured Enpp1−/...

Increasing interest is focusing on the role of the FGF-23/Klotho axis in mediating vascular calcification. However, the underpinning mechanisms have yet to be fully elucidated. Murine VSMCs were cultured in calcifying medium for a 21-day period. FGF-23 mRNA expression was significantly up-regulated by 7 days (1.63-fold; P<0.001), with a concomitant increase in protein expression. mRNA and protein expression of both FGFR1 and Klotho were confirmed. Increased FGF-23...

Introduction: In rheumatoid arthritis (RA) patients subclinical atherosclerosis and cardiovascular events (CV) occur more frequently and at younger ages than in the general population. Previous data suggest that heterogeneous plaques on USA are more unstable and frequently contain a higher amount of lipids and which make them hypoechoic and had higher potential for embolization and thrombosis. The aim of our work was to estimate the prevalence and the ultrasound morphology of ...