Хуудас 1 -аас 53 үр дүн
Osteosarcoma remains fatal in adolescents and young adults, with a 5-year survival rate of less than 20%. However, the detailed mechanism that regulates osteosarcoma metastasis is poorly understood. We analyzed the expression levels of miR-211-5p in clinical osteosarcoma samples and cell lines,
Structural changes in the extracellular matrix (ECM) are necessary for cell migration during tissue remodeling. MMPs, VEGF, Ki-67 (proliferative protein), and constituents of ECM play a critical role in angiogenesis and underlie neoplastic invasion and metastasis. This prompted us to investigate the
Food-derived bioactive peptides are reported to express a variety of functions in vivo. We studied the in vitro effect of three bioactive tripeptides, isoleucine-proline-proline (IPP), valine-proline-proline (VPP) and leucine-lysine-proline (LKP), on osteoblast proliferation and gene expression. We
The tumor suppressor TP53 can initiate a plethora of anti-proliferative effects to maintain genomic integrity under conditions of genotoxic stress. The N-terminal proline-rich domain (PRD) of TP53 is important in the regulation of TP53 activity and stability. A common polymorphism at codon 72 in
The Runx2 (Cbfa1, Aml3, PEBP2alphaA) gene plays an essential role in bone development and is one of a three-member family of closely related genes that encode the alpha-chain DNA binding components of the heterodimeric core binding factor complex. While all three mammalian Runx genes share a complex
A human osteosarcoma cell line derived from cells obtained from a patient with Paget's disease is shown to synthesize and secrete bone Gla protein (BGP); (osteocalcin), a noncollagenous bone matrix protein. Using a human BGP-specific RIA, we show that the human osteosarcoma cells synthesize
Recombinant human interferon-alpha 2C and recombinant human interferon-gamma (5-1000 U/ml) inhibit the proliferation of normal human bone-derived cells and a human osteosarcoma cell line. In the bone-derived cells the inhibitory effect of interferon-gamma was significantly greater than that of
OBJECTIVE
Expression analysis of the protein tyrosine kinases, focal adhesion kinase (FAK) and proline-rich tyrosine kinase2 (Pyk2) in high grade osteosarcomas.
METHODS
Expression of the kinases was evaluated qualitatively by immunohistochemical staining and quantitatively by real-time
To determine how progestins increase bone formation in vivo, the effects of the synthetic progestin norethindrone (NET), on aspects of bone formation in vitro were determined. NET at picomolar concentrations in vitro stimulated the proliferation of human TE85 osteosarcoma cells as assessed by the
Collagen synthesis in rat osteosarcoma cell line 17/2 (ROS 17/2) was assessed by measuring the incorporation of [3H]proline into collagenase-digestible protein and the formation of [3H]hydroxyproline. PTH and 1,25-dihydroxyvitamin D3 [1,25-(OH)2D3] inhibited collagen synthesis in ROS 17/2 cells in a
We examined the effects of dexamethasone on protein synthesis in clonal rat osteoblastic osteosarcoma (ROS) cell lines by measuring the incorporation of [3H]proline into collagenase-digestible and noncollagen protein in the cell layer and medium of the cultures. In ROS 17/2 and subclone C12 of ROS
A new analytical method for the detection and the quantitative evaluation of the undecapeptide substance P by capillary electrophoresis coupled with ion trap mass spectrometry (CE-MS) by a co-axial sheath liquid interface has been developed. Conditions of analysis employed an acidic buffer and a 60
During continuous culture with serial passage, the human osteosarcoma cell line SaOS-2 showed a time-dependent decrease in skeletal alkaline phosphatase (ALP) activity. Because this was indicative of heterogeneity, subpopulations of SaOS-2 cells were isolated from replicate low-density cultures. The
Inadequate vitamin D intake is an important cofactor in clinical and experimental bone disease induced by chronic cadmium exposure. The interaction was investigated by culture of rat osteoblastic osteosarcoma cells (ROS 17/2.8) in a serum-free medium with equimolar concentrations of cadmium chloride
Proline-directed protein kinase (PDPK) is characterized as a cytoplasmic oncogenic serine/threonine kinase that is activated by growth factor-mediated mechanisms and is proposed to function in mammalian somatic cells as an S phase promoting factor. The present study was undertaken to assess the