Bone Abstracts

Existence of inflammatory osteoclasts (iOCLs) contributing to pathological bone resorption associated with inflammatory diseases has been suspected for many years. However, specific markers of iOCLs are lacking, making impossible to establish the contribution of iOCLs to such pathologies. Whereas in steady state OCLs derive from monocytes (MN-OCLs), in inflammatory conditions, they also differentiate from dendritic cells (DC-OCLs). We recently showed that these 2 OCL populatio...

Chronic inflammatory diseases are characterized by a bone destruction mediated by an increased osteoclast (OCL) activity. OCLs are phagocytic cells arising from the myeloid lineage. Indeed, OCLs derive from monocytes (MN-OCLs) and, in an inflammatory context, they also derive from dendritic cells (DC-OCLs). Despite this origin, their role in the immune responses is still unclear. OCLs in steady state have been reported to act as antigen-presenting cells that activate CD8+...

Chronic inflammatory diseases are characterized by a bone destruction mediated by an increased osteoclast (OCL) activity. OCLs are phagocytic cells arising from the myeloid lineage. Indeed, OCLs derive from monocytes (MN-OCLs) and, in an inflammatory context, they also derive from dendritic cells (DC-OCLs). Despite this origin, their role in the immune responses is still unclear. OCLs in steady state have been reported to act as antigen-presenting cells that activate CD8+ regu...

Objectives: To determine the prevalence and intensity of D-deficiency in children and adolescents in the metropolitan area with subtotal deficiency of ultraviolet B (55° N).Methods: From May 2008 to May 2010 in a random sample of 163 Muscovites 0–18 years old (9.9±0.4; girls/boys, 81/82) serum 25-hydroxyvitamin D content was determined by chemiluminescent analysis (DiaSorin, Inc., USA; n=56 and Roche Diagnostics; n=107). ...

Osteosarcoma is the most frequent primary bone tumor that develops mainly in young adults. The survival rate at 5 years is below 30% for patients with poor response to treatment or with metastasis.The histones modifications are of critical importance in maintaining the transcription program of both normal and tumor cells. The bromodomain and extra-terminal domain (BET) protein family is an important class of ‘histone reading protein’ capable to...

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The vicious cycle established between bone associated tumors and bone resorption is the central problem with therapeutic strategies against primary bone tumors and bone metastasis. The bromodomain and extra-terminal domain (BET) protein family is an important class of ‘histone reading protein’ capable to recognize the N-acetylation of lysine residues on histone tails. BET bromain proteins have recently been described as regulators of MYC expression in various tumors....

Introduction: Although systemic lupus erythematosus (SLE) has traditionally been considered a disease of women, men may also be afected. Male osteoporosis is increasingly recognised. Several studies have reported that mean bone mineral density is significantly reduced in SLE women patients and most of them have low levels of vitamin D. The aim of our study is to analize this situation in men.Objectives: Determine 25-hydroxyvitamin-D (25OHD) serum concent...

Introduction: Gaucher disease (GD), the most prevalent glycolipid storage disease, is an autosomal recessive metabolic disorder that is caused by an inherited deficiency of the lysosomal enzyme, glycocerebrosidase. This defect leads to reduce enzyme activity, resulting in the accumulation of glucosylceramide in cells of the monocyte-macrophages linage, known as Gaucher cells. Common presenting features include anemia, thrombocytopenia, hepatosplenomegaly and bone abnormalities...