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s adenosylmethionine/sarcoma

Krækjan er vistuð á klemmuspjaldið
GreinarKlínískar rannsóknirEinkaleyfi
10 niðurstöður
Multidrug resistance (MDR) to anticancer chemotherapy is often mediated by the overexpression of the plasma membrane drug transporter P-glycoprotein (Pgp) encoded by multidrug resistance gene (MDR1). Various chemosensitizing agents are able to inhibit Pgp activity but their clinical application is
In rat kidney cells transformed by avian sarcoma virus (B77 strain) DNA is hypomethylated (2.61 +/- 0.07%) when compared to DNA extracted from normal cells (3.33 +/- 0.11%) as revealed by high-performance liquid chromatography analysis. Kinetics studies showed that no significant differences could
The dose limiting toxicity of difluoromethylornithine (DFMO), when administered by continuous infusion, is thrombocytopenia. DFMO-induced antitumor activity and thrombocytopenia were time- and dose-dependent up to 1700 mg/kg/d when administered continuously for 12 days. Concomitant ornithine

Demonstration of an altered S-adenosylmethionine synthetase in human malignant tumors xenografted into athymic nude mice.

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S-Adenosylmethionine synthetase isoenzymes (EC 2.5.1.6) were studied in human malignant tumors xenografted into athymic nude mice and were studied in normal human and rat tissues. The tumors included 7 melanomas; 4 colon carcinomas; 3 each of mammary, cervical, and ovary carcinomas; 2 each of lung

Accumulation of spliced avian retrovirus mRNA is inhibited in S-adenosylmethionine-depleted chicken embryo fibroblasts.

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The synthesis and processing of B77 avian sarcoma virus RNA in infected chicken embryo fibroblasts was followed in the presence and absence of cycloleucine, a competitive inhibitor of the synthesis of S-adenosylmethionine and thus an inhibitor of RNA methylations. An increase in the steady-state

Cycloleucine blocks 5'-terminal and internal methylations of avian sarcoma virus genome RNA.

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Cycloleucine, a competitive inhibitor of ATP: L-methionine S-adenosyltransferase in vitro, has been used to reduce intracellular concentrations of S-adenosylmethionine and by this means to inhibit virion RNA methylation in chicken embryo cells that are infected with B77 avian sarcoma virus. Under
Myofibroblastic trans-differentiation of hepatic stellate cells (HSCs) is an essential event in the development of liver fibrogenesis. These changes involve modulation of key regulators of the genome and the proteome. Methionine adenosyltransferases (MAT) catalyze the biosynthesis of the methyl
BACKGROUND Increases in liver enzymes occur in up to 86% of dogs receiving CCNU and can result in treatment delay or early discontinuation of treatment. Denamarin contains S-adenosylmethionine and silybin, both of which have been investigated as treatments for various liver diseases. OBJECTIVE Dogs
In studies in this and other laboratories, induction of hepatocardinoma by several different chemical carcinogens was enhanced in rats fed diets deficient in lipotropes (choline, methionine, folic acid), amino acids, and niacin, and high in fat. In some cases, specific supplementation with

Deregulation of methionine metabolism as determinant of progression and prognosis of hepatocellular carcinoma.

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The under-regulation of liver-specific MAT1A gene codifying for S-adenosylmethionine (SAM) synthesizing isozymes MATI/III, and the up-regulation of widely expressed MAT2A, MATII isozyme occurs in hepatocellular carcinoma (HCC). MATα1:MATα2 switch strongly contributes to the fall in SAM liver content
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