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Pagina 1 a partire dal 55 risultati
Quantitative determination of myoinositol, inositol 1-phosphate, inositol cyclic 1 : 2-phosphate and glycerylphosphoinositol in normal and Rous-sarcoma-virus-transformed quail fibroblasts under different growth conditions.
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Myoinositol and its phosphorylated derivatives have been quantitatively determined in normal and Rous-sarcoma-virus-transformed quail cells under various growth conditions using [2-(3)H]myoinositol at isotope equilibrium conditions. The following amounts were determined (nmol/mumol phospholipid, as
Dissociation of inositol trisphosphate from diacylglycerol production in Rous sarcoma virus-transformed fibroblasts.
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The metabolism of phosphatidylinositol (PI) and related intermediates was studied in uninfected and Rous sarcoma virus-(RSV) infected chicken embryo fibroblasts (CEFs). Cells infected with wild-type RSV exhibited twofold increases in steady-state concentrations of inositol trisphosphate (IP3) and
Metabolism of phosphatidyl-dCMP in sarcoma 180 cells. Effect of chlorpromazine, phosphatidic acid and inositol.
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The synthesis and degradation of phosphatidyl-dCMP was studied in intact and permeabilized Sarcoma 180 cells as well as in isolated nuclei. It was verified that chlorpromazine greatly enhanced phosphatidyl-dCMP synthesis and completely abolished its hydrolysis in intact cells. The former effect was
Myo-inositol influences release and inactivation of murine sarcoma virus from desiccated transformed mouse embryo cells.
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12-O-Tetradecanoylphorbol 13-acetate stimulates inositol lipid phosphorylation in intact human platelets.
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The phorbol esters are among the most potent tumor promoters. On addition of 12-O-tetradecanoylphorbol 13-acetate (TPA) to isolated human platelets prelabelled with [32P]orthophosphate we found a rapid increase in 32P incorporation into phosphatidylinositol 4-phosphate and phosphatidylinositol
Point mutation causing constitutive signaling of CXCR2 leads to transforming activity similar to Kaposi's sarcoma herpesvirus-G protein-coupled receptor.
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The chemokine receptor CXCR2 is the closest homologue to Kaposi's sarcoma herpesvirus-G protein-coupled receptor (KSHV-GPCR), which is known to be constitutively activated and able to cause oncogenic transformation. Among G protein-coupled receptors, a DRY sequence in the second intracellular loop
Antisense knock out of the inositol 1,3,4,5-tetrakisphosphate receptor GAP1(IP4BP) in the human erythroleukemia cell line leads to the appearance of intermediate conductance K(Ca) channels that hyperpolarize the membrane and enhance calcium influx.
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To study the role of the inositol 1,3,4,5-trisphosphate-binding protein GAP1(IP4BP) in store-operated Ca2+ entry, we established a human erythroleukemia (HEL) cell line in which the expression of GAP1(IP4BP) was substantially reduced by transfection with a vector containing antisense DNA under
Mechanistic differences between nucleic acid chaperone activities of the Gag proteins of Rous sarcoma virus and human immunodeficiency virus type 1 are attributed to the MA domain.
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Host cell tRNAs are recruited for use as primers to initiate reverse transcription in retroviruses. Human immunodeficiency virus type 1 (HIV-1) uses tRNA(Lys3) as the replication primer, whereas Rous sarcoma virus (RSV) uses tRNA(Trp). The nucleic acid (NA) chaperone function of the nucleocapsid
Humoral factors of ascites sarcoma 180 stimulate osteoblastic UMR 106-01 cell proliferation and bone resorption via signal transduction pathways, which are clearly different from those of parathyroid hormone.
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Ascites sarcoma 180 (S180A) is a transplantable tumor that induces hypercalcemia in tumor-bearing mice and stimulates bone resorption in cultured neonatal mouse calvaria without parathyroid hormone (PTH)-like activity. The serum-free conditioned media of S180A cell cultures (S180A-CM) stimulated
Novel anticancer function of inositol hexaphosphate: inhibition of human rhabdomyosarcoma in vitro and in vivo.
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Inositol hexaphosphate (IP6) is a naturally occurring polyphosphorylated carbohydrate that has been shown to suppress the growth of epithelial cancers, including those of breast and colon. The objective of this study was to investigate whether IP6 inhibits growth of rhabdomyosarcoma (RMS), a tumor
Structural basis for targeting avian sarcoma virus Gag polyprotein to the plasma membrane for virus assembly.
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For most retroviruses, including HIV-1, binding of the Gag polyprotein to the plasma membrane (PM) is mediated by interactions between Gag's N-terminal myristoylated matrix (MA) domain and phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2) in the PM. The Gag protein of avian sarcoma virus (ASV) lacks
Preferential down-regulation of phospholipase C-beta in Ewing's sarcoma cells transfected with antisense EWS-Fli-1.
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EWS-Fli-1, a fusion gene found in Ewing's sarcoma and primitive neuro-ectodermal tumour (PNET), encodes a transcriptional activator and promotes cellular transformation. We have made stable Ewing's sarcoma cells expressing antisense EWS-Fli-1 transcripts by transfecting the antisense EWS-Fli-1
Kaposi's sarcoma-associated herpesvirus G protein-coupled receptor signals through multiple pathways in endothelial cells.
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Kaposi's sarcoma-associated herpesvirus (KSHV; human herpesvirus 8) encodes a chemokine-like G protein-coupled receptor (KSHV-GPCR) that is implicated in the pathogenesis of Kaposi's sarcoma (KS). Since endothelial cells appear to be targets for the virus, we developed an in vitro mouse lung
Activation of NF-kappaB by the human herpesvirus 8 chemokine receptor ORF74: evidence for a paracrine model of Kaposi's sarcoma pathogenesis.
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Infection with human herpesvirus 8 (HHV-8), also known as Kaposi's sarcoma (KS)-associated herpesvirus, is necessary for the development of KS. The HHV-8 lytic-phase gene ORF74 is related to G protein-coupled receptors, particularly interleukin-8 (IL-8) receptors. ORF74 activates the inositol
Histamine induces interleukin-6 expression in the human synovial sarcoma cell line (SW982) through the H1 receptor.
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METHODS
The effect of histamine on inositol phosphate generation and interleukin-6 (IL-6) release from the synovial sarcoma cell line SW982 was investigated.
RESULTS
SW982 cells express functional H1 and H2 receptors. The H1 receptor antagonist [3H]-mepyramine binds to membranes from SW982 cells
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