Bone Abstracts

Background: Cherubism is a rare autosomal dominant bone disease characterized by bilateral painless enlargement of the jaws, that typically first appear at the age of 2–7 years. In this condition the affected bone is replaced with fibrous tissue, giving the patient a cherubic appearance.Until now only 300 cases have been reported in the literature.Case report: A caucasian 4-year-old male child came to our Pediatric Clinic comp...

Background: Gorham Stout syndrome, also called disseminated lymphangiomatosis, is a rare disease of unknown etiology and pathogenesis. This syndrome is characterized by an abnormal proliferation of thin walled capillaries and small lymphatic vessels that results in the massive osteolysis of adjacent bone. Surrounding soft tissues such as muscle, connective tissue, and viscera may also be affected. Chylothorax occurs secondary to direct involvement of the pleural cavity or the ...

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The bioapatite crystals have a multilayer hydrate shell, which contains impurity ions such as magnesium, sodium, potassium and it is not clear the qualitative and quantitative characteristics of noapatite entourage. The major component noapatite environment in bone is water and we studied the surface of nanocrystals from trabecular bone in healthy rats and during the water deficiency.In experiment we use adult laboratory rats (8 months age), remove the c...

The coupling of bone formation to bone resorption during treatment of postmenopausal osteoporosis with antiresorbers might be related to changes in Wnt/β-catenin signalling. We compared the effects of two bisphosphonate treatments on two Wnt inhibitors sclerostin (SOST) and Dickkopf-related protein 1 (DKK1). The study population included 72 women with postmenopausal osteoporosis participating simultaneously in two multicenter, placebo controlled trials. The patients were ...

In the recent years the role of the skeleton in glucose and energy homeostasis has been studied. In particular the osteoblast-specific protein osteocalcin (OC), in its undercarboxylated form (uOC) has been shown to influence glucose homeostasis in animal models.The aim of our study is to evaluate if the intermittent administration of 1–84 PTH could influence glucose metabolism through its anabolic action on the skeleton.We enr...

Intermittent PTH reduces vertebral fractures risk in osteoporotic patients. The mechanisms trough which PTH acts are not completely understood, it has been observed to activate Wnt pathways in osteoblasts (OBs). Activation of this pathway induces OB proliferation, differentiation and prevents apoptosis. Recently increased expression of Wnt10b by T cells during intermittent PTH, and no increase during continuous PTH has been demonstrated in mice.In order to evaluate if PTH incr...

Objective: Classical homocystinuria due to cystathionine beta-synthase (CBS) deficiency, is a rare autosomal recessively inherited disease characterized by the multiple involvement on different organs. While the most striking cause of morbidity and mortality is thromboembolism, patients develop a marked osteoporosis at early age along with many other skeletal abnormalities. As CBS normally converts homocysteine to cystathionine, the result of CBS deficiency is an accumulation ...

Recent evidence suggests that osteoblastic bone marrow niche is vital for the maintenance and self-renewal of hematopoietic stem cells (HSC). It has been recently proposed that cholesterol efflux pathways participate in HSC mobilization and that cholesterol-sensing pathways control the proliferation of HSC progenitors. Moreover, we have recently documented that HDL perturbations result in impaired osteoblastic function in mice. In the present study, we aimed at investigating t...

An increasing amount of scientific evidence suggests that western diet is a risk factor for osteopenia and osteoporosis. Indeed, metabolic acidosis, occurring after high levels of protein intake, may adversely impact on the skeleton by disrupting calcium metabolism, and leads to a decrease of bone mineral density (BMD). Currently, the prevention and treatment of osteopenia and osteoporosis are mainly based on lifestyle modifications (i.e. exercise, quitting smoking and ensurin...