Hepatic farnesyl diphosphate synthase expression is suppressed by polyunsaturated fatty acids

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Hepatic farnesyl diphosphate synthase expression is suppressed by polyunsaturated fatty acids.

Dietary vegetable oils and fish oils rich in PUFA (polyunsaturated fatty acids) exert hypocholesterolaemic and hypotriglyceridaemic effects in rodents. The plasma cholesterol-lowering properties of PUFA are due partly to a diminution of cholesterol synthesis and of the activity of the rate-limiting enzyme HMG-CoA reductase (3-hydroxy-3-methylglutaryl-CoA reductase). To better understand the mec...

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Suppression of fatty acid synthase promoter by polyunsaturated fatty acids.

Dietary polyunsaturated fat is known to suppress expression of fatty acid synthase (FAS), a central enzyme in de novo lipogenesis. The sterol regulatory element-binding protein (SREBP) has recently been shown to be involved in this suppression. We previously reported that the first 2.1 kb of the FAS promoter are sufficient for transcriptional induction by a high carbohydrate diet as well as sup...

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Localization of farnesyl diphosphate synthase in chloroplasts.

The subcellular localization of plant farnesyl diphosphate synthase (FPPS) was examined. Immunocytochemical staining using anti-FPPS1 antibody followed by electron microscopy showed that FPPS1 was localized to chloroplasts of rice mesophyll cells. Subcellular fractions from wheat leaves were examined by immunoblot analysis. FPPS was detected in the chloroplast fraction in wheat, and was protect...

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Farnesyl diphosphate synthase; regulation of product specificity.

Farnesyl diphosphate synthase (FPPS) is a key enzyme in isoprenoid biosynthesis which supplies sesquiterpene precursors for several classes of essential metabolites including sterols, dolichols, ubiquinones and carotenoids as well as substrates for farnesylation and geranylgeranylation of proteins. It catalyzes the sequential head-to-tail condensation of two molecules of isopentenyl diphosphate...

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Suppression of fatty acid synthase by dietary polyunsaturated fatty acids is mediated by fat itself, not by peroxidative mechanism.

This study examined the effect of dietary polyunsaturated fatty acids (PUFA) that were supplemented with vitamin E on lipid peroxidation, glutathione-dependent detoxifying enzyme system activity, and lipogenic fatty acid synthase (FAS) expression in rat liver. Male Sprague-Dawley rats were fed semipurified diets containing either 1% (w/w) corn oil or 10% each of beef tallow, corn oil, perilla o...

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ژورنال

عنوان ژورنال: Biochemical Journal

سال: 2005

ISSN: 0264-6021,1470-8728

DOI: 10.1042/bj20040933