Bone Abstracts

Skeletal development is characterized by sex-, race- and maturation-specific increases in bone strength. Studies using conventional QCT in the spine and femur, and peripheral QCT (pQCT) in the extremities provided insight into differences in compartment volumetric BMD (vBMD) and cortical dimensions but were limited by inadequate resolution to assess microarchitecture. For example, pQCT studies demonstrated that cortical vBMD was greater in females, while cortical section modul...

Deficiency in tissue nonspecific alkaline phosphatase (TNAP) causes hypophosphatasia (HPP), which is mainly characterized by skeletal hypomineralization. TNAP promotes mineralization by dephosphorylating the mineralization inhibitor inorganic pyrophosphate (PPi), which is generated from adenosine triphosphate (ATP) by ectonucleotide pyrophosphatase phosphodiesterase 1 (NPP1). Chronic recurrent multifocal osteomyelitis (CRMO), a sterile bone auto-inflammatory disease, has been ...

Introduction: The evidence for the effectiveness of early rehabilitation of patients with rheumatoid arthritis (RA) is scanty. The aim of the study is to evaluate the efficiency of rehabilitation program for patients with early RA.Methods: 34 study group patients with early RA underwent 6-month rehabilitation (hospital stage: 15-min local air cryotherapy (−;60 °C, Criojet Air C600) for hand, knee or ankle joints, 45-min therapeutic exercises u...

Introduction: The patients with rheumatoid arthritis (RA) are less physically active than the general population. The aim of the study is to assess the effect of two exercise programs on the functional status of patients with early RA.Methods: Fifteen patients with early RA underwent ten high-intensity dynamic exercises using Enraf-Nonius gym for 45–60 min, including aerobic part (En-Cardio) and 18–20 muscle-strengthening exercises (En-Dynamic ...

Introduction: Physical exercises improve muscle strength, aerobic capacity and bone density in patients with rheumatoid arthritis (RA). However, some physicians fear to recommend the intensive exercises. The aim of the study is to compare the efficacy of two 6-month exercise programs in patients with early RA.Methods: Fifty-one patients with early RA were randomized into 3 groups. At hospital stage 15 patients underwent ten high-intensity dynamic exercis...

Objectives: This experimental study is aimed at investigating of macroelemental contents of skeletal bones in rats after 2-month inhalation of toluene vapors (Tol) and administration of thiotriazoline (Th) and Echinaceae tinctura (ET) as medication.Methods: The experiment involved 420 male rats (young, mature and old) each separated into: intact animals, animals that received daily Tol inhalations as a single 5-h exposure to 10 MPC for ...

Introduction: Osteoporosis is a common complication in patients with chronic cholestasis, usually characterized by reduced bone formation. Ursodeoxycholic acid (UDCA) improves differentiation and mineralization and counteracts the damaging effects of bilirubin and lithocholic acid (LCA) in osteoblastic cells. Moreover, UDCA decreases apoptosis in a number of cell lines, but this antiapoptotic effect has not been investigated in bone cells.Aims: To assess...

Low bone formation is considered to be the main feature in osteoporosis associated with cholestatic and end-stage liver diseases. Previous studies have demonstrated the deleterious consequences of retained substances such as lithocholic acid (LCA) and bilirubin (Bil) on osteoblastic cells. These effects are neutralized by ursodeoxycholic acid (UDCA). To gain new insights into cholestatic-induced osteoporosis, we have assessed the differential gene expression of osteoblastic ce...

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Analysis of osteocyte function often uses promoter elements of osteocyte-specific genes i.e. SOST or Dentin-matrix-protein 1 (Dmp1) to overexpress genes or the Cre-recombinase for conditional deletion studies. However, evidence suggests that these promoters may not be osteocyte-specific, which would be critical for subsequent data interpretation. To investigate the selectivity of supposedly osteocyte-specific in vivo models, we crossed the 8kb-Dmp1-Cre mice (i) with A...