Glycogen and its Related Enzymes of Metabolism in the Central Nervous System PDF Download
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Author: M.Z.M. Ibrahim
Publisher: Springer Science & Business Media
ISBN: 3642868754
Category : Medical
Languages : en
Pages : 144
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Book Description
The glycogen content of normal mammalian CNS is small when compared with that of some other mammalian tissues such as liver and muscle. Nevertheless, this glycogen content normally comprises at least one quarter of its total reserve of energy, the rest being adenosine triphosphate (ATP), phosphocreatine and glucose. Since this glycogen undergoes a turnover 50-100 times that of brain lipids, and exceeds by several orders of magnitude that of liver glycogen, it most likely plays a dynamic role in the metabolism of brain, Gatfield et al. (1966), Prasannan and Subrahmanyam (1968b), Brunner et al. (1971), Edwards and Rogers (1972) and Watanabe and Passonneau (1973). Glycogen also has an unequal distribution in the normal mammalian brain and spinal cord (Shimizu and Kumamoto, 1952; Shimizu and Okada, 1957; Friede, 1966; Shanthaveerappa et al., 1966; Ibrahim etal., 1970a), and it is possible that areas showing more glycogen "are inherently vulnerable and that their extra glycogen is an added protective mechanism" (Ibrahim, 1972). However, this is probably not the only explanation for the unequal distribution of glycogen since it is suggested for instance that neuronal glycogen may be normally impli cated in the process of synaptic transmission (Shanthaveerappa et al., 1966; Drummond and Bellward, 1970) and that retinal glycogen plays a role in the normal dark-light adaptation sequence (Shimizu and Maeda, 1953). Also, a wide variety of physiological, pathological and experimental conditions leads to a common response in the CNS, namely, accumulation of glycogen
Author: M.Z.M. Ibrahim
Publisher: Springer Science & Business Media
ISBN: 3642868754
Category : Medical
Languages : en
Pages : 144
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Book Description
The glycogen content of normal mammalian CNS is small when compared with that of some other mammalian tissues such as liver and muscle. Nevertheless, this glycogen content normally comprises at least one quarter of its total reserve of energy, the rest being adenosine triphosphate (ATP), phosphocreatine and glucose. Since this glycogen undergoes a turnover 50-100 times that of brain lipids, and exceeds by several orders of magnitude that of liver glycogen, it most likely plays a dynamic role in the metabolism of brain, Gatfield et al. (1966), Prasannan and Subrahmanyam (1968b), Brunner et al. (1971), Edwards and Rogers (1972) and Watanabe and Passonneau (1973). Glycogen also has an unequal distribution in the normal mammalian brain and spinal cord (Shimizu and Kumamoto, 1952; Shimizu and Okada, 1957; Friede, 1966; Shanthaveerappa et al., 1966; Ibrahim etal., 1970a), and it is possible that areas showing more glycogen "are inherently vulnerable and that their extra glycogen is an added protective mechanism" (Ibrahim, 1972). However, this is probably not the only explanation for the unequal distribution of glycogen since it is suggested for instance that neuronal glycogen may be normally impli cated in the process of synaptic transmission (Shanthaveerappa et al., 1966; Drummond and Bellward, 1970) and that retinal glycogen plays a role in the normal dark-light adaptation sequence (Shimizu and Maeda, 1953). Also, a wide variety of physiological, pathological and experimental conditions leads to a common response in the CNS, namely, accumulation of glycogen
Author: M. Z. M. Ibrahim
Publisher:
ISBN: 9783642868764
Category :
Languages : en
Pages : 92
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Book Description
Author: John W. Pelley, PhD
Publisher: Elsevier Health Sciences
ISBN: 0323074464
Category : Medical
Languages : en
Pages : 254
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Book Description
Effectively merge basic science and clinical skills with Elsevier's Integrated Review Biochemistry, by John W. Pelley, PhD. This concise, high-yield title in the popular Integrated Review Series focuses on the core knowledge in biochemistry while linking that information to related concepts from other basic science disciplines. Case-based questions at the end of each chapter enable you to gauge your mastery of the material, and a color-coded format allows you to quickly find the specific guidance you need. Online access via www.studentconsult.com - included with your purchase - allows you to conveniently access the book's complete text and illustrations online as well as relevant content from other Student Consult titles. This concise and user-friendly reference provides crucial guidance for the early years of medical training and USMLE preparation. Spend more time reviewing and less time searching thanks to an extremely focused, "high-yield" presentation. Gauge your mastery of the material and build confidence with both case-based, andUSMLE-style questions that provide effective chapter review and quick practice for your exams. Access the full contents online at www.studentconsult.com where you'll find the complete text and illustrations, "Integration Links" to bonus content in other Student Consult titles, an interactive community center with a wealth of additional resources, and much more! Grasp and retain vital concepts more easily thanks to a color-coded format, succinct,text, key concept boxes, and dynamic illustrations that facilitate learning in a highly visual approach. Effectively review for problem-based courses with the help of text boxes that help you clearly see the clinical relevance of the material. Great for visual learners!
Author: N. V. Bhagavan
Publisher: Academic Press
ISBN: 0120954400
Category : Medical
Languages : en
Pages : 1068
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Book Description
This text presents the fundamentals of biochemistry and related topics for all those pursuing medical or other health-related fields such as clinical chemistry, medical technology, or pharmacology.
Author: Johannes Hirrlinger
Publisher: Humana Press
ISBN: 9781493910588
Category : Medical
Languages : en
Pages : 0
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Book Description
Brain Energy Metabolism addresses its challenging subject by presenting diverse technologies allowing for the investigation of brain energy metabolism on different levels of complexity. Model systems are discussed, starting from the reductionist approach like primary cell cultures which allow assessing of the properties and functions of a single brain cell type with many different types of analysis, however, at the expense of neglecting the interaction between cell types in the brain. On the other end, analysis in animals and humans in vivo is discussed, maintaining the full complexity of the tissue and the organism but making high demands on the methods of analysis. Written for the popular Neuromethods series, chapters include the kind of detailed description and key implementation advice that aims to support reproducible results in the lab. Meticulous and authoritative, Brain Energy Metabolism provides an ideal guide for researchers interested in brain energy metabolism with the hope of stimulating more research in this exciting and very important field.
Author: Mauro DiNuzzo
Publisher: Springer Nature
ISBN: 3030274802
Category : Medical
Languages : en
Pages : 440
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Book Description
This book aims to provide a state-of-the-art summary of what is currently known about brain glycogen metabolism, detailing the recent advances in our understanding of why glycogen is so critical for normal brain function. The role of glycogen in cellular neurophysiology remains largely unclear and its specific contribution to the energy demand of brain cells is still elusive.Glycogen is the sole cerebral glucose reserve and is emerging as a fundamental component of brain energy metabolism. Pharmacological or genetic manipulation of glycogen metabolism in the brain impairs memory formation and increases susceptibility to epileptic seizures and cortical spreading depression. Glycogen is also directly implicated in abnormal neuronal excitability and mental retardation that characterize brain disorders like Lafora disease and Pompe disease.
Author:
Publisher:
ISBN: 9780815332183
Category : Cells
Languages : en
Pages : 0
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Book Description
Author: Institute of Medicine
Publisher: National Academies Press
ISBN: 0309082587
Category : Medical
Languages : en
Pages : 172
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Book Description
This report from the Committee on Military Nutrition Research reviews the history of caffeine usage, the metabolism of caffeine, and its physiological effects. The effects of caffeine on physical performance, cognitive function and alertness, and alleviation of sleep deprivation impairments are discussed in light of recent scientific literature. The impact of caffeine consumption on various aspects of health, including cardiovascular disease, reproduction, bone mineral density, and fluid homeostasis are reviewed. The behavioral effects of caffeine are also discussed, including the effect of caffeine on reaction to stress, withdrawal effects, and detrimental effects of high intakes. The amounts of caffeine found to enhance vigilance and reaction time consistently are reviewed and recommendations are made with respect to amounts of caffeine appropriate for maintaining alertness of military personnel during field operations. Recommendations are also provided on the need for appropriate labeling of caffeine-containing supplements, and education of military personnel on the use of these supplements. A brief review of some alternatives to caffeine is also provided.
Author: Robert Vink
Publisher: University of Adelaide Press
ISBN: 0987073052
Category : Medical
Languages : en
Pages : 354
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Book Description
The brain is the most complex organ in our body. Indeed, it is perhaps the most complex structure we have ever encountered in nature. Both structurally and functionally, there are many peculiarities that differentiate the brain from all other organs. The brain is our connection to the world around us and by governing nervous system and higher function, any disturbance induces severe neurological and psychiatric disorders that can have a devastating effect on quality of life. Our understanding of the physiology and biochemistry of the brain has improved dramatically in the last two decades. In particular, the critical role of cations, including magnesium, has become evident, even if incompletely understood at a mechanistic level. The exact role and regulation of magnesium, in particular, remains elusive, largely because intracellular levels are so difficult to routinely quantify. Nonetheless, the importance of magnesium to normal central nervous system activity is self-evident given the complicated homeostatic mechanisms that maintain the concentration of this cation within strict limits essential for normal physiology and metabolism. There is also considerable accumulating evidence to suggest alterations to some brain functions in both normal and pathological conditions may be linked to alterations in local magnesium concentration. This book, containing chapters written by some of the foremost experts in the field of magnesium research, brings together the latest in experimental and clinical magnesium research as it relates to the central nervous system. It offers a complete and updated view of magnesiums involvement in central nervous system function and in so doing, brings together two main pillars of contemporary neuroscience research, namely providing an explanation for the molecular mechanisms involved in brain function, and emphasizing the connections between the molecular changes and behavior. It is the untiring efforts of those magnesium researchers who have dedicated their lives to unraveling the mysteries of magnesiums role in biological systems that has inspired the collation of this volume of work.
Author: Mohamed Z. M. Ibrahim
Publisher: Springer
ISBN: 9780387074542
Category : Central nervous system
Languages : en
Pages : 89
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Book Description
