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The potential role of CXC chemokines bearing the glu-leu-arg (ELR) motif in bone repair was studied using a cranial defect (CD) model in mice lacking the CXC receptor (mCXCR −/− knockout mice), which is homologous to knockout of the human CXC receptor 2 (CXCR2) gene. During the inflammatory stage of bone repair, ELR CXC chemokines are released by inflammatory cells and serve as chemotactic...
Osteopontin (OPN) is an important mediator of bone remodeling. However, the role of OPN in the process of bone formation is not fully understood. In previous studies, we have shown that MC3T3-E1 pre-osteoblastic cells at higher passage number exhibited weakened osteogenic capacity and elevated OPN mRNA expression. In this work, we investigated the role of OPN on proliferation and differentiation of...
The existence in osteoblasts of the G-protein-coupled extracellular calcium (Ca o2+ )-sensing receptor (CaR) that was originally cloned from parathyroid and kidney remains controversial. In our recent studies, we utilized multiple detection methods to demonstrate the expression of CaR transcripts and protein in several osteoblastic cell lines, including murine MC3T3-E1 cells. Although...
We measured bone mineral density (BMD) at the lumbar spine (LS-BMD), 13 radius (1/3R-BMD), and ultradistal radius (UDR-BMD) in 59 men (4 with spine fractures and 4 with nonspine fractures) and 65 women (10 with spine fractures and 9 with nonspine fractures), all receiving maintenance hemodialysis (HD). The BMD at each site expressed absolutely in g/cm 2 was significantly lower in women than...
We describe a patient with tumoral calcinosis, in which acetazolamide (ACZ) was, for the first time, tested for its therapeutic efficacy. The 19-year-old Japanese man had been suffering from multiple recurrent calcific masses with tenderness around the finger, knee, and toe joints since 10 months of age. Radiographs revealed several calcific subcutaneous masses around the finger joints, and calcific...
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