Download or read book Cholesterol 7 Alpha hydroxylase is Regulated Post translationally by AMPK written by Mauris E. C. Nnamani and published by . This book was released on 2009 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Type II diabetes and dyslipidemia are common metabolic disorders resulting in a higher risk of cardiovascular disease, larger bile acid pools, and excretion rates; suggesting an association between abnormal bile acid and cholesterol biosynthesis with type II diabetes and cardiovascular disease. The rate at which cholesterol is converted to bile acids is determined by the activity of the liver enzyme, cholesterol 7 alpha-hydroxylase. AMP-activated protein kinase (AMP), has long been recognized as regulating cholesterol synthesis by controlling 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase, the second and rate-limiting step of cholesterol synthesis. In addition, AMPK is significant for its roles in energy metabolism. 5-aminoimidazole-4-carboxamide-1-beta-D-ribofuranoside (AICAR) is an activator of AMPK. Previous work in the Stroup lab have shown that AICAR treatment changes the rate at which the human hepatoma cell line (HepG2) synthesizes bile acids without significantly changing message RNA levels, as measured with real-time PCR. Also recombinant human cholesterol 7-alpha-hydroxylase can be covalently modified by commercially available AMPK in kinase assays. To test the hypothesis that cholesterol 7 alpha-hydroxylase activity can be regulated posttranslationally by phosphorylation, catalytically active cholesterol 7 alpha-hydroxylase was expressed in E. coli, purified and reacted with purified AMPK, cAMP-dependant protein kinase (PKA), and protein kinase C (PKC). Cholesterol 7 alpha-hydroxylase activity was determined by measuring the conversion of cholesterol into 7 alpha-hydroxycholesterol by recombinant CYP7A1 using LC-MS. The product was measured without chemical derivation with an orthogonal atmospheric pressure chemical ionization source (APCI) detector, using a method developed for this study. The effects of the kinases on activity of the recombinant enzyme were compared to that of extracts prepared from HepG2 cells. The activities measured from the kinase-treated extracts were significantly different than controls, and were specific to the kinases used. Site-directed mutagenesis was performed to determine phosphorylation sites responsible for the effects noticed by kinase activity. AMPK repressed E. coli-expressed recombinant CYP7A1 enzymatic activity by phosphorylating S252. The finding that the activity of cholesterol 7 alpha-hydroxylase can be regulated post-translationally by AMPK provides a possible mechanism of coordinating cholesterol disposal with cholesterol synthesis.
Download or read book High Density Lipoproteins written by Arnold von Eckardstein and published by Springer. This book was released on 2015-01-13 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this Handbook of Experimental Pharmacology on “High Density Lipoproteins – from biological understanding to clinical exploitation” contributing authors (members of COST Action BM0904/HDLnet) summarize in more than 20 chapters our current knowledge on the structure, function, metabolism and regulation of HDL in health and several diseases as well as the status of past and ongoing attempts of therapeutic exploitation. The book is of interest to researchers in academia and industry focusing on lipoprotein metabolism, cardiovascular diseases and immunology as well as clinical pharmacologists, cardiologists, diabetologists, nephrologists and other clinicians interested in metabolic or inflammatory diseases.
Download or read book Targeting the microbiota to attenuate chronic inflammation written by Sergio Serrano-Villar and published by Frontiers Media SA. This book was released on 2023-05-12 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Endothelium written by Michel Félétou and published by Morgan & Claypool Publishers. This book was released on 2011 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: The endothelium, a monolayer of endothelial cells, constitutes the inner cellular lining of the blood vessels (arteries, veins and capillaries) and the lymphatic system, and therefore is in direct contact with the blood/lymph and the circulating cells. The endothelium is a major player in the control of blood fluidity, platelet aggregation and vascular tone, a major actor in the regulation of immunology, inflammation and angiogenesis, and an important metabolizing and an endocrine organ. Endothelial cells controls vascular tone, and thereby blood flow, by synthesizing and releasing relaxing and contracting factors such as nitric oxide, metabolites of arachidonic acid via the cyclooxygenases, lipoxygenases and cytochrome P450 pathways, various peptides (endothelin, urotensin, CNP, adrenomedullin, etc.), adenosine, purines, reactive oxygen species and so on. Additionally, endothelial ectoenzymes are required steps in the generation of vasoactive hormones such as angiotensin II. An endothelial dysfunction linked to an imbalance in the synthesis and/or the release of these various endothelial factors may explain the initiation of cardiovascular pathologies (from hypertension to atherosclerosis) or their development and perpetuation. Table of Contents: Introduction / Multiple Functions of the Endothelial Cells / Calcium Signaling in Vascular Cells and Cell-to-Cell Communications / Endothelium-Dependent Regulation of Vascular Tone / Conclusion / References
Download or read book Comprehensive Foodomics written by and published by Elsevier. This book was released on 2020-11-12 with total page 2444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Foodomics, Three Volume Set offers a definitive collection of over 150 articles that provide researchers with innovative answers to crucial questions relating to food quality, safety and its vital and complex links to our health. Topics covered include transcriptomics, proteomics, metabolomics, genomics, green foodomics, epigenetics and noncoding RNA, food safety, food bioactivity and health, food quality and traceability, data treatment and systems biology. Logically structured into 10 focused sections, each article is authored by world leading scientists who cover the whole breadth of Omics and related technologies, including the latest advances and applications. By bringing all this information together in an easily navigable reference, food scientists and nutritionists in both academia and industry will find it the perfect, modern day compendium for frequent reference. List of sections and Section Editors: Genomics - Olivia McAuliffe, Dept of Food Biosciences, Moorepark, Fermoy, Co. Cork, Ireland Epigenetics & Noncoding RNA - Juan Cui, Department of Computer Science & Engineering, University of Nebraska-Lincoln, Lincoln, NE Transcriptomics - Robert Henry, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, Australia Proteomics - Jens Brockmeyer, Institute of Biochemistry and Technical Biochemistry, University Stuttgart, Germany Metabolomics - Philippe Schmitt-Kopplin, Research Unit Analytical BioGeoChemistry, Neuherberg, Germany Omics data treatment, System Biology and Foodomics - Carlos Leon Canseco, Visiting Professor, Biomedical Engineering, Universidad Carlos III de Madrid Green Foodomics - Elena Ibanez, Foodomics Lab, CIAL, CSIC, Madrid, Spain Food safety and Foodomics - Djuro Josic, Professor Medicine (Research) Warren Alpert Medical School, Brown University, Providence, RI, USA & Sandra Kraljevic Pavelic, University of Rijeka, Department of Biotechnology, Rijeka, Croatia Food Quality, Traceability and Foodomics - Daniel Cozzolino, Centre for Nutrition and Food Sciences, The University of Queensland, Queensland, Australia Food Bioactivity, Health and Foodomics - Miguel Herrero, Department of Bioactivity and Food Analysis, Foodomics Lab, CIAL, CSIC, Madrid, Spain Brings all relevant foodomics information together in one place, offering readers a ‘one-stop,’ comprehensive resource for access to a wealth of information Includes articles written by academics and practitioners from various fields and regions Provides an ideal resource for students, researchers and professionals who need to find relevant information quickly and easily Includes content from high quality authors from across the globe
Download or read book Regulation of Hepatic Metabolism written by K. Jungermann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: The liver is an exceptionally complex and diverse organ that functions both as an exocrine and an endocrine gland. It secretes bile, which contains many con stituents in addition to bile salts, and it synthesizes and releases many substances in response to the body's demands, including prohormones, albumin, clotting factors, glucose, fatty acids, and various lipoproteins. It has a dual blood supply providing a rich mixture of nutrients and other absorbed substances via the portal vein and oxygen-rich blood via the hepatic artery. This functional heterogeneity is accompanied by cellular heterogeneity. The liver contains many cell types including hepatic parachymal cells, Kiipffer cells, Ito cells, and endothelial cells. The most abundant cell type, the parenchymal cells, are biochemically and structurally heterogeneous. The cells in the oxygen-rich areas of the portal triad appear more dependent on oxidative metabolism, whereas those around the central vein (pericentral, perivenous, or centrolobular areas) are more dependent upon an anaerobic mechanism. Throughout this volume the latter three terms are used synonymously by various authors to indicate the five to eight layers of cells radiating from the central vein. Structural and metabolic heterogeneity of hepatic parenchymal cells has been demonstrated by a variety of approaches, including histochemical, ultra structural, and ultramicrobiochemical studies. This microheterogeneity is linked to the physiological functions of the liver and its response to injurious substances.
Download or read book Vitamin D written by H.F. DeLuca and published by Springer. This book was released on 2011-12-13 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because diseases of the bone are often less acute and less lifethreatening than dis eases of the circulatory system, gastrointestinal tract, kidney, liver, and the nervous system, they have received a disproportionately smaller amount of attention in the medical world. With the average increasing life span of man as a result of improve ments in modern medicine, espe~ially in the pediatric field, the seriousness of many metabolic bone diseases has indeed become more obvious. In addition, other improvements in medicine, such as hemodialysis for the preservation of renal failure patients, have permitted the development of other consequences of diseased kidneys, one of which is the appearance of renal osteodystrophy. Finally, the appearance of several genetic disorders in the area of metabolic bone disease has been underscored by the solution of other pediatric diseas~s of much more serious consequences. These emerging problems all suggest that much remains to be learned concerning the sys temic control of bone, both as a structural organ and as a reservoir for the important elements of calcium and phosphorus so essential for the support of life in complex multicellular organisms of which man is the most important. As will be demonstrated in the historical portion of this manuscript, the existence of the three most important humoral factors regulating bone metabolism and func tion are now known.
Download or read book Bile Acids and Their Receptors written by Stefano Fiorucci and published by Springer Nature. This book was released on 2019-09-03 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focusses on the latest results related to the field of bile acids as signaling molecules and describes how these receptors have become a major pharmacological target. It covers all major areas of research in this field, from genetics, chemistry, in silico modeling, molecular biology to clinical applications, offering a cross-country view of the functional role of bile acids as signaling molecules, virtually acting on all major areas of metabolism. While FXR and GPBAR1 are essential bile acid sensors that integrate the de novo bile acid synthesis with intestinal microbiota and liver metabolism, in a broader sense, BARs play a pathogenic role in the development of common human alignments including liver, intestinal and metabolic disorders, such as steatosis (NAFLD) and steato-hepatitis (NASH), diabetes, obesity and atherosclerosis.
Download or read book Functional Foods and Cardiovascular Disease written by Mohammed H. Moghadasian and published by CRC Press. This book was released on 2012-02-10 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cardiovascular disease remains the number one killer in North America and around the world. The staggering medical costs involved in treating patients suffering from this disease demand an alternative approach to prevent or minimize its development. In Functional Foods and Cardiovascular Disease, international researchers reveal essential up-to-date information on the role that functional foods and nutraceuticals play in preventing the development of heart disease. Highlighting the physiological benefits of a host of functional foods, the book examines: The pathogenesis of coronary artery disease Genetic methods for enhancing bioactives in foods and new techniques for extracting bioactive components for developing functional foods Clinical and experimental evidence of the cardiovascular benefits of fish oils and plant oils, particularly flaxseed oil The importance of folic acid in homocysteine metabolism and its impact on cardiovascular disease Clinical and experimental evidence for the cardiovascular benefits of plant sterols The beneficial effects of wine, garlic products, eggs, fiber, cocoa and chocolate, and coffee and tea on cardiovascular health While there have been great improvements in treating coronary heart disease through surgery and medications, prevention through diet and exercise should remain an essential priority in maintaining the health of the aging population. Nutritionists, food scientists, and those working in the health industry will find that this book enhances their understanding of the potential role of functional foods in combating cardiovascular disease before more aggressive treatment is needed.
Download or read book Management of Wilson Disease written by Michael L. Schilsky and published by Springer. This book was released on 2018-08-24 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: This pocket guide provides a concise yet comprehensive overview of the pathogenesis, treatment, and management of Wilson disease. Drawing upon expertise from the Center of Excellence at Yale University in liver disease, neurology, and psychiatry for adult and pediatric patients, as well as dieticians, clinical trial coordinators, representatives from the Wilson Disease Association and outside experts from the US and UK as well, this guide provides a balanced and easy to digest approach to understanding treatment and care for Wilson disease patients. The text reviews different treatment options and other care needed to address clinical symptoms, as well as the testing needed for monitoring efficacy and adherence. Furthermore, the volume discusses these issues in the context of a best care model, which is an integrative care model where patients and their caregivers partner with Centers of Excellence with expertise in this rare disorder, to achieve best long-term outcomes. Written by experts in the field, Management of Wilson Disease: A Pocket Guide is a valuable resource for clinicians and primary care physicians who treat patients with Wilson disease.
Download or read book The Biology of Cholesterol and Related Steroids written by N. B. Myant and published by Butterworth-Heinemann. This book was released on 2014-04-24 with total page 925 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Biology of Cholesterol and Related Steroids focuses on the study of sterols in relation to living organisms. The publication first takes a look at the analysis of sterols and related steroids and the distribution of sterols and related steroids in nature, as well as the processes of extraction and separation and presence of sterols in plants, fungi, vertebrates, and invertebrates. The text then ponders on biosynthesis of sterols and metabolism of cholesterol. Topics include formation of fatty acid esters of cholesterol, steroid hormones, biosynthetic pathway to sterols, reaction mechanisms, and comparative aspects of sterol synthesis. The manuscript examines the developmental aspects of cholesterol metabolism and sterols in biological membranes. The book also reviews cholesterol synthesis in animal tissues, sterol metabolism in isolated cells, and epidemiology of the plasma cholesterol. Discussions focus on selection of statistical populations, genetic influences, regulation of sterol synthesis, general aspects of sterol metabolism, and removal of cell cholesterol in vivo. The publication is a dependable source of data for biochemists and readers interested in the biology of cholesterol and steroids.
Download or read book The Metabolism of Bile Acids written by Marjorie Greene Foster and published by . This book was released on 1919 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cellular Lipid Metabolism written by Christian Ehnholm and published by Springer Science & Business Media. This book was released on 2009-07-07 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: For years lipids have fascinated cell biologists and biochemists due to their profound effects on cell function. "Cellular Lipid Metabolism" highlights new concepts and recent findings, but also reviews important discoveries made in the past. Outstanding international experts contribute 13 chapters on the genetics, molecular and cell biology of lipids. Presenting analyses at the molecular level they reveal the principles by which cellular lipid metabolism functions. Further, numerous intriguing observations that cannot yet be explained are identified, stimulating the readers to future studies. This book provides an invaluable source of information for biomedical researchers in energy metabolism, vascular biology, endocrinology and lipidology.
Download or read book Intracellular Signaling Mediators in the Circulatory and Ventilatory Systems written by Marc Thiriet and published by Springer Science & Business Media. This book was released on 2012-09-26 with total page 1073 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volumes in this authoritative series present a multidisciplinary approach to modeling and simulation of flows in the cardiovascular and ventilatory systems, especially multiscale modeling and coupled simulations. The cardiovascular and respiratory systems are tightly coupled, as their primary function is to supply oxygen to and remove carbon dioxide from the body's cells. Because physiological conduits have deformable and reactive walls, macroscopic flow behavior and prediction must be coupled to phenomenological models of nano- and microscopic events in a corrector scheme of regulated mechanisms when the vessel lumen caliber varies markedly. Therefore, investigation of flows of blood and air in physiological conduits requires an understanding of the biology, chemistry, and physics of these systems together with the mathematical tools to describe their functioning. Volume 4 is devoted to major sets of intracellular mediators that transmit signals upon stimulation of cell-surface receptors. Activation of signaling effectors triggers the release of substances stored in cellular organelles and/or gene transcription and protein synthesis. Complex stages of cell signaling can be studied using proper mathematical models, once the role of each component is carefully handled. Volume 4 also reviews various categories of cytosolic and/or nuclear mediators and illustrates some major signal transduction pathways, such as NFkappaB axis, oxygen sensing, and mechanotransduction.
Download or read book Bioactive Molecules in Food written by Jean-Michel Mérillon and published by Springer Nature. This book was released on 2019-01-25 with total page 2353 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference work provides comprehensive information about the bioactive molecules presented in our daily food and their effect on the physical and mental state of our body. Although the concept of functional food is new, the consumption of selected food to attain a specific effect existed already in ancient civilizations, namely of China and India. Consumers are now more attentive to food quality, safety and health benefits, and the food industry is led to develop processed- and packaged-food, particularly in terms of calories, quality, nutritional value and bioactive molecules. This book covers the entire range of bioactive molecules presented in daily food, such as carbohydrates, proteins, lipids, isoflavonoids, carotenoids, vitamin C, polyphenols, bioactive molecules presented in wine, beer and cider. Concepts like French paradox, Mediterranean diet, healthy diet of eating fruits and vegetables, vegan and vegetarian diet, functional foods are described with suitable case studies. Readers will also discover a very timely compilation of methods for bioactive molecules analysis. Written by highly renowned scientists of the field, this reference work appeals to a wide readership, from graduate students, scholars, researchers in the field of botany, agriculture, pharmacy, biotechnology and food industry to those involved in manufacturing, processing and marketing of value-added food products.
Download or read book The Biliary System written by David Q.-H. Wang and published by Biota Publishing. This book was released on 2012-03-12 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The exponential expansion of knowledge in the field of hepatobiliary diseases makes systematic revisions of current concepts almost mandatory nowadays. This eBook summarizes the progress in understanding the molecular mechanism of cholesterol and bile acid metabolism and the physical-chemistry of biliary lipids, with emphasis on biliary lipid metabolism that is regulated by nuclear receptors in the hepatobiliary system. By guiding the readers through the various aspects of anatomy, physiology, and biochemistry of all "players" involved in bile formation, this eBook is intended to be a compendium of recent progresses in understanding the molecular mechanisms of cholesterol and bile acid metabolism.
Download or read book Metabolism at a Glance written by J. G. Salway and published by John Wiley & Sons. This book was released on 2017-02-06 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metabolism at a Glance presents a concise, illustrated summary of metabolism in health and disease. This essential text is progressively appropriate for introductory through to advanced medical and biochemistry courses. It also provides a succinct review of inborn errors of metabolism, and reference for postgraduate medical practitioners and biomedical scientists who need a resource to quickly refresh their knowledge. Fully updated and extensively illustrated, this new edition of Metabolism at a Glance is now in full colour throughout, and includes new coverage of sports biochemistry; the metabolism of lipids, carbohydrates and cholesterol; glyceroneogenesis, α-oxidation and ω-oxidation of fatty acids. It also features the overlooked “Krebs Uric Acid Cycle”. Metabolism at a Glance offers an accessible introduction to metabolism, and is ideal as a revision aid for students preparing for undergraduate and USMLE Step 1 exams.
