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We succeeded in purifying a major glycolipid fraction from a green vegetable, spinach. This fraction consists mainly of three glycolipids: monogalactosyl diacylglycerol (MGDG), digalactosyl diacylglycerol (DGDG), and sulfoquinovosyl diacylglycerol (SQDG). In a previous study, we found that the glycolipid fraction inhibited DNA polymerase activity, cancer cell growth and tumor growth with subcutaneous...
Total parenteral nutrition (TPN) studies in human babies of very-low-birth-weight suggest that the lipid emulsions currently available are not optimum for neonatal nutrition. Since fatty acid metabolism in human and pigs is very similar, the present study examines how lipid emulsions used in clinical TPN (i.e. ClinOleic, Intralipid, Lipofundin or Omegaven), with different fatty acid compositions,...
Photolabeling and site-directed mutagenesis were performed on recombinant Saccharomyces cerevisiae 24-C-sterol methyltransferase (SMT) to elucidate the location and role of active site residues involved in AdoMet binding and catalysis. Bioinformatic analysis of the SMT revealed a ten amino acid segment, conserved between L124 and P133, associated with the Rossmann-like fold belonging to AdoMet-dependent...
The effects of four cornstarches containing various contents of resistant starch on serum and liver cholesterol levels in rats fed a high-cholesterol diet were investigated. Male Sprague Dawley rats (aged 4 weeks) were divided into four groups (n = 7) and fed high-cholesterol diets containing 15% of cornstarch (CS), heat-moisture-treated CS (HCS), high-amylose CS (HA), or heat-moisture-treated HA...
Liquid chromatography–ion trap mass spectrometry (LC/ITMS) was employed for a metabolic kinetics study of tert-butylhydroquinone (TBHQ) and its metabolites in rat serum after oral administration. The mean serum concentration–time data of TBHQ and its four metabolites (M1–M4) in both male and female rats after oral administration of TBHQ at dosages of 7, 350 and 700 mg/kg were all best-fitted by a...
Hei Yi Zhuang is an isolated subgroup of the Zhuang minority in China. This study was designed to compare the difference in the hepatic lipase gene (LIPC) −514C/T polymorphism and its association with lipid profiles between the Guangxi Hei Yi Zhuang and Han populations. Genotyping of the LIPC −514C/T was performed in 873 subjects of Hei Yi Zhuang and 867 participants of Han Chinese. The frequency...
Modern diets are often deficient in ω-3 fatty acids and additional dietary sources of ω-3 fatty acids are useful. In order to investigate the molecular basis of the high accumulation of the ω-3 fatty acid, α-linolenic acid (18:3), in three different plants, flax (Linum usitatissimum), Dracocephalum moldavica, and Perilla frutescens ω-3 desaturase activity, transcript levels, and 18:3 in-vivo synthesis...
The aim of the present study was to assess the plasma fatty acid composition of the total plasma lipids and lipid fractions in obese prepubertal children with and without metabolic syndrome (MS). Thirty-four obese prepubertal children were recruited: 17 who met MS criteria and 17 who did not; and twenty prepubertal children of normal weight. MS characteristics, insulin resistance (by homeostasis model...
α,β-unsaturated aldehydes are toxic products of lipid peroxidation. Detection and characterization of these aldehydes is important in many human disease states as well as in the food industry. Our study shows that electron ionization-mass spectrometry (EI-MS) and positive-ion chemical ionization-mass spectrometry (PICI-MS), but not electron capture negative ionization-mass spectrometry (ECNI-MS),...
Insulin resistance is characterized by increased metabolic uptake of fatty acids. Accordingly, techniques to examine in vivo shifts in fatty acid metabolism are of value in both clinical and experimental settings. Partially metabolizable long chain fatty acid (LCFA) tracers have been recently developed and employed for this purpose: [9,10-3H]-(R)-2-bromopalmitate ([3H]-BROMO) and [125I]-15-(ρ-iodophenyl)-3-...
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