Xenobiotic metabolism

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  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài: " Xenobiotic metabolizing enzyme gene polymorphisms predict response to lung volume reduction surgery...

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  • Cytochrome P450 monooxygenases (P450s) are a diverse collection of enzymes acting on various endogenous and xenobiotic molecules. Most of them catalyse hydroxylation reactions and one group of possible substrates are fatty acids and their related structures. In this minireview, the signifi-cance of P450s in microbial fatty acid conversion is described.

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  • As a research scientist in the area of human nutrition, I have observed a sea change in emphasis within my field over the past 10–15 years. There have always been dynamics within the subject: During the first half of the twentieth century, scientists grappled with discovering the essential micronutrients and with characterizing the biological effects of their deficiency. This interest in “too little” was supplanted in the mid-1980s by a preoccu- pation with too much—too much fat, too much sugar, and too much obesity.

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  • The production of free radicals (ROS) is an unavoidable consequence of life in an aerobic environment. Free radicals produced from the metabolic activities of oxygen attack biological membranes and lipoproteins via oxidation in a process called lipid perioxidation. This attack damages cells and lipids often in a chain reaction with carbon-based molecules such as polyunsaturated fatty acids (PUFA) in a reaction with molecular oxygen. This creates oxidative stress and damage to tissues. Free radicals also damage chromosomal DNA.

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  • As a research scientist in the area of human nutrition, I have observed a sea change in emphasis within my field over the past 10–15 years. There have always been dynamics within the subject: During the first half of the twentieth century, scientists grappled with discovering the essential micronutrients and with characterizing the biological effects of their deficiency. This interest in “too little” was supplanted in the mid-1980s by a preoccupation with too much—too much fat, too much sugar, and too much obesity.

    pdf153p cronus75 14-01-2013 21 4   Download

  • Peroxisome proliferator-activated receptora(PPARa) is thought to play an important role in lipid metabolism in the liver. To clarify the extra-hepatic and⁄or unknown function of PPARa, we previously performed a proteome analysis of the intestinal proteins and identified 17b-hydroxyster-

    pdf9p dell39 27-03-2013 12 1   Download

  • Metabolomics (or metabonomics) is metabolite profil- ing, measuring the real outcome of the potential changes suggested by genomics and proteomics. Metabolomics investigates regulation and metabolic fluxes in individual cells or cell types. Metabonomics combines the power of high-resolution nuclear magnetic resonance with statistical data analysis of in vivo metabolite patterns. This technique enables rapid screening for xenobiotic toxicity, disease state, drug efficiency, nutritional status and even gene function in the “whole” organism. (Nicholson et al., 2002).

    pdf50p conduongdinhmenh 07-05-2013 24 3   Download

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