Abstract
BackgroundOsteoporosis is a systemic metabolic disease based on age-dependent imbalance between the rates of bone formation and bone resorption. Recent studies on the pathogenesis of this disease identified that bone remodelling impairment, at the base of osteoporotic bone fragility, could be related to protein glycation, in association to oxidative stress. The glycation reactions lead to the generation of glycation end products (AGEs) which, in turn, accumulates into bone, where they binds to the receptor for AGE (RAGE). The aim of this study is to investigate the potential role of circulating sRAGE in osteoporosis, in particular evaluating the correlation of sRAGE with the fracture risk, in association with bone mineral density, the fracture risk marker FGF23, and lipid metabolism.ResultsCirculating level of soluble RAGE correlate with osteopenia and osteoporosis level. Serum sRAGE resulted clearly associated on the one hand to bone fragility and, on the other hand, with BMI and leptin. sRAGE is particularly informative because serum sRAGE is able to provide, as a single marker, information about both the aspects of osteoporotic disease, represented by bone fragility and lipid metabolism.ConclusionsThe measure serum level of sRAGE could have a potential diagnostic role in the monitoring of osteoporosis progression, in particular in the evaluation of fracture risk, starting from the prevention and screening stage, to the osteopenic level to osteoporosis.
Highlights
Osteoporosis is a systemic metabolic disease based on age-dependent imbalance between the rates of bone formation and bone resorption
The aim of this study is to investigate the potential role of circulating soluble form of RAGE receptor (sRAGE) in osteoporosis, in particular evaluating the correlation of sRAGE with the fracture risk, in association with bone mineral density e and the fracture risk marker Fibroblast growth factor-23 (FGF23) (Fibroblast Growth Factor 23), involved in bone mineral metabolism
The population was divided according to sRAGE quartiles, calculating in each quartiles the mean lumbar and femoral T-score and Z-score values (Fig. 1, panel b) and the amount of patients having osteopenia, osteoporosis and normal bone according to LMBD and FBMD T-score and T-score values ranges (Fig. 1 panel c and d, respectively)
Summary
Osteoporosis is a systemic metabolic disease based on age-dependent imbalance between the rates of bone formation and bone resorption. Recent studies on the pathogenesis of this disease identified that bone remodelling impairment, at the base of osteoporotic bone fragility, could be related to protein glycation, in association to oxidative stress. Osteoporosis is a systemic metabolic disease and recent studies on the pathogenesis of this disease identified that bone remodelling impairment, at the base of osteoporotic bone fragility, could be related to protein glycation, in association to oxidative stress [5]. Upon binding AGEs, RAGE increase osteoclasts activity and decrease osteoblasts activity [12, 13], contributing to increase bone resorption and, bone fragility [5, 14]
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