40 research outputs found
A research education program model to prepare a highly qualified workforce in biomedical and health-related research and increase diversity
Ascorbic acid regulates osterix expression in osteoblasts by activation of prolyl hydroxylase and ubiquitination-mediated proteosomal degradation pathway
Bone Morphogenetic Protein (BMP) Localization in Developing Human and Rat Growth Plate, Metaphysis, Epiphysis, and Articular Cartilage
Der Einsatz der RNA-Arbitrarily-Primed-PCR (RAP-PCR) als nicht radioaktives molekularbiologisches Screeningverfahren zum Nachweis differentieller Veränderungen im Knochenstoffwechsel
Extracellular Signal-Regulated Kinase 1/2 Is Involved in Ascorbic Acid–Induced Osteoblastic Differentiation in Periodontal Ligament Cells
Induction of a low voltage-activated, fast-inactivating Ca2+ channel in cultured bone marrow stromal cells by dexamethasone
The production of biochemical markers associated with the osteoblastic phenotype, and accompanying changes in the expression of voltage-operated Ca2+ channels, have been examined in rat bone marrow stromal cell cultures treated with dexamethasone (10(-8) M). Whole cell clamp analysis of voltage-operated Ca2+ channels in control cultures (using Ba2+ as the charge carrier) revealed primarily a high voltage-activated (HVA), slowly inactivating current, which was enhanced two- to threefold by treatment of the cells with Bay K 8644 (300 nM) and inhibited by nifedipine (4 mu M). In dexamethasone-treated cultures, the I-V relationship for inward current was shifted to more positive potentials in comparison with control cells. Most cells in these cultures possessed both the HVA current and also a faster inactivating, low-voltage-activated (LVA), nifedepine-resistant current. These two currents could be separated both by nifedipine and by the use of steady state inactivation of the LVA current. The two components of the Ba2+ current varied widely in their relative size. The combination of LVA and HVA currents seen in dex-induced stromal cells resembles records of voltage-operated Ca2+ channels from cultures of calvarial osteoblasts