BACKGROUND The aim of the study was to carry out a comprehensive analysis of determinants of multiple bone fractures in children with regard to densitometric indices and markers of bone metabolism. MATERIAL AND METHODS The study involved 112 children aged 5-18 years, including 81 patients with a history of at least 3 bone fractures and 31 healthy patients in a control group. Total body and sp...

The purpose of the present study was to analyze the effect of treatment of Paget's disease of bone (PDB) with bone scintigraphy using a computer-assisted diagnosis system (BONENAVI) that quantitatively evaluates bone metabolism. Seven patients with PDB (three male, four female; average age, 60 years; age range, 33-80 years) underwent bone scintigraphy and measurement of serum alkaline phosphata...

Reduction of mechanical stress on bone inhibits osteoblast-mediated bone formation and accelerates osteoclast-mediated bone resorption, and leads to what has been called disuse osteoporosis. Prolonged therapeutic bed rest, immobilization due to motor paralysis from injury of the central nervous system or peripheral nerves, application of cast to treat fractures, a common causes of disuse osteop...

Renal osteodystrophy is a multifactorial disorder of bone remodelling that develops in patients with chronic renal failure. During the last few years numerous biochemical markers of bone turnover have been proposed for the non-invasive diagnosis of renal osteodystrophy. Several enzymes and matrix proteins produced by osteoblasts and osteoclasts, including collagen type I degradation products, h...

Insulin signaling in bone-forming osteoblasts stimulates bone formation and promotes the release of osteocalcin (OC) in mice. Only a few studies have assessed the direct effect of insulin on bone metabolism in humans. Here, we studied markers of bone metabolism in response to acute hyperinsulinemia in men and women. Thirty-three subjects from three separate cohorts (n=8, n=12 and n=13) particip...

OBJECTIVE Redox imbalance contributes to bone fragility. We have evaluated the in vivo role of nuclear factor erythroid derived 2-related factor-2 (Nrf2), an important regulator of cellular responses to oxidative stress, in bone metabolism using a model of postmenopausal osteoporosis. METHODS Ovariectomy was performed in both wild-type and mice deficient in Nrf2 (Nrf2(-/-)). Bone microarchite...

OBJECTIVES Abnormalities of bone metabolism could be followed in gastrectomized patients as a late complication. Nowadays, many biochemical and radiologic measurements are applied to detect these abnormalities. The aim of our study is to determine the valuable parameter as an appropriate screening test during long-term follow-up periods and define the usefulness of new biochemical markers for b...

BACKGROUND The mechanism of generating and synchronizing daily rhythms of bone and mineral metabolism markers has not been entirely explained. Most studies indicate that LD cycle and/or feeding schedules provide important synchronizers of these rhythms. It seems that endogenous factors, including systemic and local hormones can be important in the mechanism of dependence of bone and mineral met...