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Author: A. Crastes de Paulet
Publisher: Springer Science & Business Media
ISBN: 1468474278
Category : Medical
Languages : en
Pages : 405
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Book Description
This book contains the proceedings of the ARW NATO Conference on "Action of Free Radicals and Active Forms of Oxygen on Lipoproteins and Membrane Lipids: Cellular Interactions and Atherogenesis", held in Bendor, France, October 5-8,1988. Since the pioneer work of Mc Cord and Fridovitch, growing interest has been focused on the study of the role of oxyradicals role in pathology. This interest is reflected in the exponential increase in the number of papers on free radicals, the success of specialized journals and books on this theme, and the organization of national and international meetings. These meetings have discussed, from.a broad point of view, the problems concerning the mechanisms of production of free radicals, their effects on cell CO!1$tituants (lipids, proteins, nucleic acids) and cell function, the methods of analysis of these phenomena, the pathological states in which free radicals may be involved, natural biological defense systems, and the design of "antiradical" therapies. But it is now well established that the most common target of oxy free radicals are membrane lipids because of their chemical nature (cholesterol in saturation, malonic linkage of polyunsaturated fatty acids (PUFA» and of their regular structural arrangement (monolayers in lipoproteins, bilayers in cell membranes). Thus the analysis of the products resulting from the action of oxy free radicals on PUFA is considered the best tool to indirectly evaluate the effects of tissue peroxidations, although the analytical basis for doing so is very questionable.
Author: A. Crastes de Paulet
Publisher: Springer Science & Business Media
ISBN: 1468474278
Category : Medical
Languages : en
Pages : 405
Get Book Here
Book Description
This book contains the proceedings of the ARW NATO Conference on "Action of Free Radicals and Active Forms of Oxygen on Lipoproteins and Membrane Lipids: Cellular Interactions and Atherogenesis", held in Bendor, France, October 5-8,1988. Since the pioneer work of Mc Cord and Fridovitch, growing interest has been focused on the study of the role of oxyradicals role in pathology. This interest is reflected in the exponential increase in the number of papers on free radicals, the success of specialized journals and books on this theme, and the organization of national and international meetings. These meetings have discussed, from.a broad point of view, the problems concerning the mechanisms of production of free radicals, their effects on cell CO!1$tituants (lipids, proteins, nucleic acids) and cell function, the methods of analysis of these phenomena, the pathological states in which free radicals may be involved, natural biological defense systems, and the design of "antiradical" therapies. But it is now well established that the most common target of oxy free radicals are membrane lipids because of their chemical nature (cholesterol in saturation, malonic linkage of polyunsaturated fatty acids (PUFA» and of their regular structural arrangement (monolayers in lipoproteins, bilayers in cell membranes). Thus the analysis of the products resulting from the action of oxy free radicals on PUFA is considered the best tool to indirectly evaluate the effects of tissue peroxidations, although the analytical basis for doing so is very questionable.
Author: Roberto Rodríguez
Publisher: Springer Science & Business Media
ISBN: 1468457608
Category : Science
Languages : en
Pages : 425
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Book Description
For many, the terms aging, maturation and senescence are synonymous and used interchangeably, but they should not be. Whereas senescence represents an endogenously controlled degenerative programme leading to plant or organ death, genetiC aging encompasses a wide array of passive degenerative genetiC processes driven primarily by exogenous factors (Leopold, 1975). Aging is therefore considered a consequence of genetiC lesions that accumulate over time, but by themselves do not necessarily cause death. These lesions are probably made more severe by the increase in size and complexity in trees and their attendant physiology. Thus while the withering of flower petals following pollination can be considered senescence, the loss of viability of stored seeds more clearly represents aging (Norden, 1988). The very recent book "Senescence and Aging in Plants" does not discuss trees, the most dominant group of plants on the earth. Yet both angiospermic and gymnospermic trees also undergo the above phenomena but less is known about them. Do woody plants senesce or do they just age? What is phase change? Is this synonymous with maturation? While it is now becoming recognized that there is no programmed senescence in trees, senescence of their parts, even in gymnosperms (e. g. , needles of temperate conifers las t an average of 3. 5 years), is common; but aging is a readily acknowledged phenomenon. In theory, at least, in the absence of any programmed senescence trees should -live forever, but in practice they do not.
Author: Carla Ferreri
Publisher: John Wiley & Sons
ISBN: 1118683463
Category : Science
Languages : en
Pages : 208
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Book Description
Lipidomics is an important aspect of personalized medicine in relation to nutrition and metabolism. This approach has become important due to the substantial presence of nutraceuticals in the market, since it gives personalized criteria on how to choose the right nutraceutical strategy for both prevention and for quality of life. This multi-disciplinary textbook uses a simple and practical approach to provide a comprehensive overview of lipidomics and their connection with health and nutrition. The text is divided into two parts: - Part 1 outlines the basics of lipidomics and focuses on the biochemical and nutritional aspects with descriptions of the analytical methods employed for the examination of cell membrane fatty acid composition. - Part 2 familiarizes the reader with the use of membrane lipidomic diagnostics in practical health care, using health conditions as examples to introduce the concept of lipidomic profiles in different physiological and pathological situations including prevention. Through the various properties of membrane lipidomics, readers will be able to combine the molecular status of the cell membrane with the evaluation of the subject for personalized nutritional and nutraceutical strategies. Membrane Lipidomics for Personalized Health will be beneficial to biologists, biochemists and medical researchers, as well as health care professionals, pharmacists, and nutritionists seeking in-depth information on the topic.
Author: Carmen Vigo-Pelfrey
Publisher: CRC-Press
ISBN: 9780849340727
Category : Science
Languages : en
Pages : 320
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Book Description
This two-volume text compiles the efforts of distinguished scientists nd focuses on the formation of free radicals, toxic effects of lipoperoxides, biological antioxidant protection against lipid peroxidation damage, and pathological implications of lipid peroxidation. This review also addresses vitamin E deficiency, carbon tetrachloride and ethanol poisoning, radiation damage, hyperbaric effects, tumors, aging, diabetes, liver degeneration, DNA damage, lipoprotein modification and artherosclerosis, multiple sclerosis, angiopathy, Parkinson's disease, lupus, and many other degenerative diseases. It is an excellent resource for biological chemist, cell biologists, and all who are interested in the pharmaceutical sciences.
Author: Lawrence J. Berliner
Publisher: Springer Nature
ISBN: 303047318X
Category : Science
Languages : en
Pages : 237
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Book Description
This book describes the methods of analysis and determination of oxidants and oxidative stress in biological systems. Reviews and protocols on select methods of analysis of ROS, RNS, oxygen, redox status, and oxidative stress in biological systems are described in detail. It is an essential resource for both novices and experts in the field of oxidant and oxidative stress biology.
Author: Augustine S. H. Ong
Publisher: The American Oil Chemists Society
ISBN: 9780935315646
Category : Antioxidants
Languages : en
Pages : 396
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Book Description
Antioxidant activities of phenolic compounds in solutions membranes, and lipoprotein. Nutrition and biochemistry of the lipophilic antioxidants vitamin E and Carotenoids. Biokinetics of human plasma vitamin E concentrations. Free-radical regulatory and immunomodulatory effects of bio-normalizer. Effect of dietary factors on the metabolism of essential fatty acids-focusing on the components of spices. Studies on green tea polyphenols antiocidadtive and protctive effects on biomembranes. Phenolic antioxidant components of evening primrose. Tocotrienols and cholesterol metabolism. Tocotrienols-A dose-dependent inhibitor for HMG CoA reductase. The cholesterol-and tumor suppressive actions of palm oil isoprenoids. Anti-cancer properties of tocotrienols from palm oil. the ubiquinones of palm oil. Effects of soybean oil supplement im palm oil dieta on weight gain and tissue lipids of rats. Effects of pal oil as a dietary supplement on Eel culture.Role of n-3 fatty acids in cultured cardiomyocyte. Enhancement of PG12 formation by eicosapentaenoic acid in rat vascular smooth muscle cells. Inhibition of DNA-biosynthesis by B-Carotene in the P-388 lymphocytic leukemia cell. the relation between serum lipids and lipoprotein levels. Uses of lipophore system for lipoprotein electrophresis of human lipemic plasma. Effect of low-fat and low-protein diets on cholesterol metabolism in the aortas, livers, and small intestine of male albino rats. Effects of a decrease in linoleic acid intake on indices of cardiovascular risk and lipid perocidation. Conjugated diene fatty acids in human and animal tissues. Deficiency of n-3 polyunsaturated fatty acids in the retina brains, and liver of chow-fed ghinea pigs. Fat-modified eggs. Palm oil comsumption effects on urinary excretions of phytoestrogens and estrogenic steroids. Calories, fat and cancer. Antioxidants in the prevention of oral cancer. Role of antioxidants in healing gastric ulcers. role of different types of dietary fat in experimetal alcoholic liver disease. use of natural antioxidants as a prophylactic for neurological disordes. Dietary implications for parasitc and viral infectious disease. Vitamin C metabolism in malaria. Nutrition in populations.
Author: Catherine Rice-Evans
Publisher: Ashgate Publishing
ISBN:
Category : Medical
Languages : en
Pages : 208
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Book Description
In recent years, the role of free radicals and antioxidants has become a part of the aetiology of a surprisingly large number of diseases. The area of cardiovascular research has now perhaps exceeded many of the others. Much remains however, to be learned about how oxidation is initiated and about the roles of different lipids and lipoproteins fractions.
Author: ONG
Publisher: Birkhäuser
ISBN: 3034874324
Category : Science
Languages : en
Pages : 654
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Book Description
Antioxidants inhibit the formation and spread of free radicals which can be damaging in biological systems. Free radicals form in biological systems through metabolism, but it is also realized that exogenous environmental sources, such as radiation, food, and drugs, contribute significantly to the generation of free radicals in biological systems. Being reactive species, free radicals are short-lived and do not travel far from cellular targets. Their concentration in biological systems is very low and is difficult to detect directly by electron spin resonance spectroscopy (ESR). Indirect methods of reactions of radicals with specific biomolecules are also sufficiently sensitive to detect quantitatively their presence. Thus the response of antioxidant defenses which react with radical species, can serve as an indirect measure that free radicals have been formed. Redox-based antioxidants change their oxidation state and antioxidants become free radicals themselves. Often, however, the antioxidants give rise to more persistent free radicals, sometimes owing to delocalization of the lone electron around ring structures (in vitamin E, ubiquinones, and certain carotenes). Persistent free radicals react only rarely and the precursors often can be regenerated in biological systems. In recent years, it is becoming clearer from biochemical studies on how the major lipophilic antioxidants work. Particular attention has been given to vitamin E and quinones found in animal and plant membranes and in carotenoids, for the protection of membranes in lipoprotein systems. Flavonoids form another rich and varied source of natural antioxidants.
Author: Rodolfo Paoletti
Publisher: Elsevier
ISBN: 1483215393
Category : Science
Languages : en
Pages : 321
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Book Description
Advances in Lipid Research, Volume 17 is a six-chapter text that covers the most prevalent problems in lipoprotein mechanism research works. The opening chapters examine the metabolic role of high-density lipoproteins (HDL), specifically the role of HDL in cholesterol transport. The next chapter discusses cholesterol metabolism in various types of clinical hyperlipidemias and describes cholesterol turnover as a function of hypercholesterolemia, hypertriglyceridemia, or a combination of the two. Other chapters deal with the hypocholesterolemic effect of polyunsaturated fats on man, as well as the mechanism of lipid peroxidation in mitochondrial membranes and its effects on alterations in cellular processes. The closing chapter relates to membrane phenomena, with particular emphasis to the study of membrane structure by means of membrane-cooperative enzymes. This chapter also explores the application of allosterism as a tool for membrane research. This book will prove useful to lipid and enzyme chemists, biochemists, and researchers.
Author: ONG
Publisher: Birkhäuser
ISBN: 9783034874342
Category : Science
Languages : en
Pages : 0
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Book Description
Antioxidants inhibit the formation and spread of free radicals which can be damaging in biological systems. Free radicals form in biological systems through metabolism, but it is also realized that exogenous environmental sources, such as radiation, food, and drugs, contribute significantly to the generation of free radicals in biological systems. Being reactive species, free radicals are short-lived and do not travel far from cellular targets. Their concentration in biological systems is very low and is difficult to detect directly by electron spin resonance spectroscopy (ESR). Indirect methods of reactions of radicals with specific biomolecules are also sufficiently sensitive to detect quantitatively their presence. Thus the response of antioxidant defenses which react with radical species, can serve as an indirect measure that free radicals have been formed. Redox-based antioxidants change their oxidation state and antioxidants become free radicals themselves. Often, however, the antioxidants give rise to more persistent free radicals, sometimes owing to delocalization of the lone electron around ring structures (in vitamin E, ubiquinones, and certain carotenes). Persistent free radicals react only rarely and the precursors often can be regenerated in biological systems. In recent years, it is becoming clearer from biochemical studies on how the major lipophilic antioxidants work. Particular attention has been given to vitamin E and quinones found in animal and plant membranes and in carotenoids, for the protection of membranes in lipoprotein systems. Flavonoids form another rich and varied source of natural antioxidants.
