arachidonic acid/sarcoma

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Some effects of the essential fatty acids linoleic acid and alpha-linolenic acid and of their metabolites gamma-linolenic acid, arachidonic acid, eicosapentaenoic acid, docosahexaenoic acid, and of prostaglandins A1 and E1 on the proliferation of human osteogenic sarcoma cells in culture.

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Gamma-linolenic acid has been shown to suppress the rate of proliferation of a number of malignant cell lines in culture. To test the proposal that this was a specific prostaglandin 1- or 2-series effect, 379 batches of MG63 human osteogenic sarcoma cells were seeded in Greiner flasks and cultured

Active metabolism of arachidonic acid by Kaposi sarcoma cells cultured from lung biopsies (KS-3); identification by HPLC and MS/MS of the predominant metabolite secreted as the 11,12-epoxy-eicosatrienoic acid.

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The development of long-term culture of AIDS-KS cells has allowed us to investigate further a possible vascular origin of Kaposi sarcoma. Taking into account the relative specificity of arachidonic acid (AA) metabolism according to cell type, the AA 'cascade' was analyzed in cultured KS-3 cells

Modulation of arachidonic acid metabolism by Rous sarcoma virus.

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Arachidonic acid (C20:4) metabolites were released constitutively from wild-type Rous sarcoma virus-transformed chicken embryo fibroblasts (CEF). 3H-labeled C20:4 and its metabolites were released from unstimulated and uninfected CEF only in response to stimuli such as serum, phorbol ester, or the

Arachidonic Acid Derived Lipid Mediators Influence Kaposi's Sarcoma-Associated Herpesvirus Infection and Pathogenesis.

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Kaposi's sarcoma-associated herpesvirus (KSHV) infection, particularly latent infection is often associated with inflammation. The arachidonic acid pathway, the home of several inflammation and resolution associated lipid mediators, is widely altered upon viral infections. Several in vitro

[Neoadjuvant chemotherapy and cyclo-oxygenase pathway of arachidonic acid metabolism in osteogenic sarcoma].

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Membrane lipid acyl group alterations in cells infected with a temperature-conditional mutant of Rous sarcoma virus.

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The increased percentage of oleic acid and decreased percentage of arachidonic acid which occurs in the lipids of chicken embryo fibroblasts transformed by Rous sarcoma virus was shown to be transformation specific rather than a consequence of virus infection. Cells infected with a temperature

[Hormones and auto-paracrine tumor growth regulators in osteogenic sarcoma].

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The paper analyzes the data of long-term studies made in the N. N. Blokhin Cancer Research Center, Russian Academy of Medical Sciences. The study dealt with androgen exchange, the baseline levels of serum sexual steroid hormones and their receptors in the tumor, the blood concentrations of the

Rat osteogenic sarcoma cells: modulation of hormone stimulated cyclic AMP production by prostaglandin antagonists and biosynthesis inhibitors.

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1. The effects of several anti-prostaglandin drugs on parathyroid hormone (PTH) and prostaglandin E2 (PGE2) stimulated cyclic AMP production in freshly isolated rat osteogenic sarcoma cells have been studied. 2. PG biosynthesis inhibitors (aspirin and indomethacin) did not inhibit the effect of PTH

[Prostaglandins of series E in morphologic variants of osteogenic sarcoma and evaluation of the degree of therapeutic pathomorphism of the tumor].

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The content of prostaglandins E (PGE) is studied in osteogenic sarcomas from 191 patients. The level of PGE after a neo-adjuvant therapy of osteogenic sarcoma depends upon the individual susceptibility to the drug. Inverse correlation is found between the PGE content in the tumor and the degree of

Cyclo-oxygenase products of arachidonic acid metabolism in rat osteoblasts in culture.

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The metabolism of arachidonic acid to its cyclo-oxygenase products was studied in monolayer cultures of osteoblast-rich rat calvarial cells and of clonal cell lines from a rat osteogenic sarcoma, enriched in the osteoblast phenotype. Prostanoids were measured by radioimmunoassay after extraction of

Arachidonic acid stimulates cell growth in an osteoblastic cell line, MC3T3-E1, by noneicosanoid mechanism.

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Arachidonic acid, added to alpha-minimum essential medium containing 10% fetal bovine serum at the final concentration of 10(-4) M, significantly increased DNA content of an osteoblastic cell line, MC3T3-E1, along with an increase of DNA synthesis. No growth-stimulatory effect of arachidonic acid

Immunoregulation of antitumor response; differential secretion of arachidonic acid metabolites by macrophages during stimulation in vitro with BCG and Corynebacterium parvum.

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The level of arachidonic acid (AA) metabolites in the supernatants of cultured peritoneal exudate cells (PEC) were studied under various conditions using BCG and Corynebacterium parvum as stimulators. The metabolite levels were analyzed by thin layer chromatography (TLC). The degree of macrophage

Restriction of patching of bound concanavalin A after incorporation of arachidonic acid into the plasma membrane of virally transformed fibroblasts.

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Topographical distribution of concanavalin A binding sites (CABS) was studied in two lines of virally transformed fibroblasts as a function of fatty acid composition. Fatty acid composition was manipulated by incubating cells in fatty acid, ATP, CoA, and delipidated fetal calf serum (FCS). VLM cells

Essential fatty acids and acquired immunodeficiency syndrome.

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Acquired immunodeficiency syndrome (AIDS) is caused by human immunodeficiency virus (HIV) that is characterized by profound immunodeficiency, opportunistic infections and Kaposi's sarcoma. As yet no effective therapy is available for AIDS, though retroviral drugs are able to prolong life and contain

[Hormones, autocrine and paracrine regulators of tumor growth in osteosarcoma].

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The data on 300 patients, aged 14-56, treated at the Center's Clinic have been evaluated. They include findings on androgen metabolism, basal level of secretion of sex steroid hormones in blood serum and their receptors in tumor, blood concentrations of sex steroids, binding globulin and pituitary

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