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prostaglandin f 2 alpha/sarcoma

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Pagina 1 a partire dal 159 risultati
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

Beta-adrenergic agonist- and prostaglandin-mediated regulation of cAMP levels in Ewing's sarcoma cells in culture.

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This is the first report demonstrating hormonal control of cAMP levels in Ewing's sarcoma cells. Two classes of hormones, beta-adrenergic agonists and prostaglandins stimulate cAMP production in cultured Ewing's sarcoma cells. The efficacy order for beta-adrenergic agonists is (-)-isoprenaline
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
In Kaposi's sarcoma tissue, prostaglandin E2 (PgE2) levels and cAMP phosphodiesterase levels were found to be higher than in surrounding normal tissue. We have shown earlier that PgE2 suppresses interferon (IFN) alpha production. High levels of cAMP phosphodiesterases result in low cAMP levels.

Prostaglandin E2 content of regressing and progressing Moloney sarcomas.

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Regressing mouse Moloney sarcomas contain macrophages that are activated for tumor cell killing, while those found in progressively growing sarcomas either cannot kill or do so very poorly. Prostaglandin E2 (PGE2) has been shown to down-regulate macrophage activation in vitro. The study described
We have previously shown that both parathyroid hormone (PTH) and prostaglandin E2 (PGE2) stimulate the activity of creatine kinase BB (CKBB) in rat bone cells in culture. Therefore, morphologically distinct rat osteogenic sarcoma cells in culture were tested for stimulation of CKBB activity by
Radioimmunoassay was used in 46 cases of osteogenic sarcoma to assess prostaglandin E (PgE) levels in tumor tissue. Those levels were found to vary with age. A correlation was established between the effect of preoperative chemoradiation treatment, on the one hand, and degree of treatment-induced
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
Seven clonal sublines of the strain of syrian hamster embryo cells transformed in vitro by the Rous sarcoma virus were obtained. All clones possessed both high resistance to damage by hydrogen peroxide and a capacity to release E-type prostaglandins in response to contact with NK-cells in vitro. The

Prostaglandin synthesis inhibition: effect on bone changes and sarcoma tumor induction in balb/c mice.

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An increase in prostaglandins (PGs) of the E series has been demonstrated in Moloney sarcoma virus (MSV)-induced leg tumors of 6-week-old BALB/c male mice. The level of the hormone has been shown to increase with the tumor diameter and decrease with tumor regression. At the peak of tumor size the
Kaposi's sarcoma-associated herpes virus (KSHV) is implicated in the pathogenesis of KS, a chronic inflammation-associated malignancy. Cyclooxygenase-2 (COX-2) and its metabolite prostaglandin E2 (PGE2), two pivotal proinflammatory/oncogeneic molecules, are proposed to play roles in the expression
Adenylate cyclase activity in particulate fractions from a transplantable rat osteogenic sarcoma was stimulated in a dose-dependent manner by prostaglandins E1 and E2 (PGE1 and PGE2) and parathyroid hormone (PTH). Prostaglandin F2alpha was active at a high concentration (3 x 10(-4) mol/l).
Effective chemotherapeutic strategies for uterine sarcoma are lacking; existing therapies achieve poor response rates. Previous studies have identified the prostaglandin 15-deoxy-Δ12,14-prostaglandin J2 (15d-PGJ2) as a potential anticancer treatment; however, its effectiveness in uterine sarcoma has
The role of cyclooxygenase-2 (COX-2), its lipid metabolite prostaglandin E2 (PGE2), and Eicosanoid (EP) receptors (EP; 1-4) underlying the proinflammatory mechanistic aspects of Burkitt's lymphoma, nasopharyngeal carcinoma, cervical cancer, prostate cancer, colon cancer, and Kaposi's sarcoma (KS) is
Cyclic AMP production by freshly isolated cells, from a 32P-induced transplantable rat osteogenic sarcoma, was stimulated by PGE1, PGE2 and to a less extent by PGF2alpha and PGA2. In the case of PGE2, the cyclic AMP content of cells was maximal within 5 min. The 13,14-dihydroderivatives of PGE1,
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