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Author: Gilles Gouspillou
Publisher: Frontiers Media SA
ISBN: 2889450732
Category :
Languages : en
Pages : 144
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Book Description
Skeletal muscle is the most abudant tissue of the human body, making up to 40 to 50% of the human body mass. While the importance of optimal muscle function is well recognized in the athletic field, its significance for general health is often underappreciated. In fact, the evidence that muscle mass, strength and metabolism are essential for our overall health is overwhelming. As the largest protein reservoir in the human body, muscles are essential in the acute response to critical illness such as sepsis, advanced cancer, and traumatic injury. Loss of skeletal muscle mass has also been associated with weakness, fatigue, insulin resistance, falls, fractures, frailty, disability, several chronic diseases and death. As a consequence, maintaining skeletal muscle mass, strength and metabolism throughout the lifespan is critical to the maintenance of whole body health. Mitochondria are fascinating organelles regulating many critical cellular processes for skeletal muscle physiology, including for instance energy supply, reactive oxygen species production, calcium homeostasis and the regulation of apoptosis. It is therefore not surprising that mitochondrial dysfunction has been implicated in a large number of adverse events/conditions and pathologies affecting skeletal muscle health. While the importance of normal mitochondrial function is well recognized for muscle physiology, there are important aspects of mitochondrial biology that are still poorly understood. These include mitochondrial dynamics (fusion and fission processes), morphology and processes involved in mitochondrial quality control (mitophagy). Defining the mechanisms regulating these different aspects of mitochondrial biology, their importance for muscle physiology, as well as the interrelations will be critical for expanding understanding of the role played by mitochondria in skeletal muscle physiology and health. The present research topic provides readers with novel experimental approaches, knowledge, hypotheses and findings related to all aspects of mitochondrial biology in healthy and diseased muscle cells.
Author: Gilles Gouspillou
Publisher: Frontiers Media SA
ISBN: 2889450732
Category :
Languages : en
Pages : 144
Get Book Here
Book Description
Skeletal muscle is the most abudant tissue of the human body, making up to 40 to 50% of the human body mass. While the importance of optimal muscle function is well recognized in the athletic field, its significance for general health is often underappreciated. In fact, the evidence that muscle mass, strength and metabolism are essential for our overall health is overwhelming. As the largest protein reservoir in the human body, muscles are essential in the acute response to critical illness such as sepsis, advanced cancer, and traumatic injury. Loss of skeletal muscle mass has also been associated with weakness, fatigue, insulin resistance, falls, fractures, frailty, disability, several chronic diseases and death. As a consequence, maintaining skeletal muscle mass, strength and metabolism throughout the lifespan is critical to the maintenance of whole body health. Mitochondria are fascinating organelles regulating many critical cellular processes for skeletal muscle physiology, including for instance energy supply, reactive oxygen species production, calcium homeostasis and the regulation of apoptosis. It is therefore not surprising that mitochondrial dysfunction has been implicated in a large number of adverse events/conditions and pathologies affecting skeletal muscle health. While the importance of normal mitochondrial function is well recognized for muscle physiology, there are important aspects of mitochondrial biology that are still poorly understood. These include mitochondrial dynamics (fusion and fission processes), morphology and processes involved in mitochondrial quality control (mitophagy). Defining the mechanisms regulating these different aspects of mitochondrial biology, their importance for muscle physiology, as well as the interrelations will be critical for expanding understanding of the role played by mitochondria in skeletal muscle physiology and health. The present research topic provides readers with novel experimental approaches, knowledge, hypotheses and findings related to all aspects of mitochondrial biology in healthy and diseased muscle cells.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Skeletal muscle is the most abudant tissue of the human body, making up to 40 to 50% of the human body mass. While the importance of optimal muscle function is well recognized in the athletic field, its significance for general health is often underappreciated. In fact, the evidence that muscle mass, strength and metabolism are essential for our overall health is overwhelming. As the largest protein reservoir in the human body, muscles are essential in the acute response to critical illness such as sepsis, advanced cancer, and traumatic injury. Loss of skeletal muscle mass has also been associated with weakness, fatigue, insulin resistance, falls, fractures, frailty, disability, several chronic diseases and death. As a consequence, maintaining skeletal muscle mass, strength and metabolism throughout the lifespan is critical to the maintenance of whole body health. Mitochondria are fascinating organelles regulating many critical cellular processes for skeletal muscle physiology, including for instance energy supply, reactive oxygen species production, calcium homeostasis and the regulation of apoptosis. It is therefore not surprising that mitochondrial dysfunction has been implicated in a large number of adverse events/conditions and pathologies affecting skeletal muscle health. While the importance of normal mitochondrial function is well recognized for muscle physiology, there are important aspects of mitochondrial biology that are still poorly understood. These include mitochondrial dynamics (fusion and fission processes), morphology and processes involved in mitochondrial quality control (mitophagy). Defining the mechanisms regulating these different aspects of mitochondrial biology, their importance for muscle physiology, as well as the interrelations will be critical for expanding understanding of the role played by mitochondria in skeletal muscle physiology and health. The present research topic provides readers with novel experimental approaches, knowledge, hypotheses and findings related to all aspects of mitochondrial biology in healthy and diseased muscle cells.Skeletal muscle is the most abudant tissue of the human body, making up to 40 to 50% of the human body mass. While the importance of optimal muscle function is well recognized in the athletic field, its significance for general health is often underappreciated. In fact, the evidence that muscle mass, strength and metabolism are essential for our overall health is overwhelming. As the largest protein reservoir in the human body, muscles are essential in the acute response to critical illness such as sepsis, advanced cancer, and traumatic injury. Loss of skeletal muscle mass has also been associated with weakness, fatigue, insulin resistance, falls, fractures, frailty, disability, several chronic diseases and death. As a consequence, maintaining skeletal muscle mass, strength and metabolism throughout the lifespan is critical to the maintenance of whole body health. Mitochondria are fascinating organelles regulating many critical cellular processes for skeletal muscle physiology, including for instance energy supply, reactive oxygen species production, calcium homeostasis and the regulation of apoptosis. It is therefore not surprising that mitochondrial dysfunction has been implicated in a large number of adverse events/conditions and pathologies affecting skeletal muscle health. While the importance of normal mitochondrial function is well recognized for muscle physiology, there are important aspects of mitochondrial biology that are still poorly understood. These include mitochondrial dynamics (fusion and fission processes), morphology and processes involved in mitochondrial quality control (mitophagy). Defining the mechanisms regulating these different aspects of mitochondrial biology, their importance for muscle physiology, as well as the interrelations will be critical for expanding understanding of the role played by mitochondria in skeletal muscle physiology and health. The present research topic provides readers with novel experimental approaches, knowledge, hypotheses and findings related to all aspects of mitochondrial biology in healthy and diseased muscle cells.
Author: Sabzali Javadov
Publisher:
ISBN: 9783039363841
Category :
Languages : en
Pages : 434
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Book Description
Mitochondria are subcellular organelles evolved by the endosymbiosis of bacteria with eukaryotic cells. They are the main source of ATP in the cell and engaged in other aspects of cell metabolism and cell function, including the regulation of ion homeostasis, cell growth, redox status, and cell signaling. Due to their central role in cell life and death, mitochondria are also involved in the pathogenesis and progression of human diseases/conditions, including neurodegenerative and cardiovascular disorders, cancer, diabetes, inflammation, and aging. However, despite the increasing number of studies, precise mechanisms whereby mitochondria are involved in the regulation of basic physiological functions, as well as their role in the cell under pathophysiological conditions, remain unknown. A lack of in-depth knowledge of the regulatory mechanisms of mitochondrial metabolism and function, as well as interplay between the factors that transform the organelle from its role in pro-survival to pro-death, have hindered the development of new mitochondria-targeted pharmacological and conditional approaches for the treatment of human diseases. This book highlights the latest achievements in elucidating the role of mitochondria under physiological conditions, in various cell/animal models of human diseases, and in patients.
Author: Yana Konokhova
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
"Skeletal muscle plasticity is highly dependent on mitochondrial function. Mitochondria regulate critical intracellular functions, including energy production in the form of oxidative phosphorylation and intrinsic pathways of apoptosis. As such, mitochondrial impairments are implicated in adverse muscle impact seen in numerous age-associated diseases as well as healthy aging. For example, low mitochondrial content and impaired oxidative capacity are well-characterized features of locomotor muscle of patients with Chronic Obstructive Pulmonary Disease (COPD). High oxidative stress and physical inactivity are typical of COPD pathophysiology and have been proposed to contribute to low muscle oxidative capacity. At the single fiber level, oxidative capacity can be compromised from insufficient quantities of functional mitochondrial DNA (mtDNA). Our investigations revealed that the high oxidative stress milieu of COPD muscle corresponded to increased incidence of mtDNA mutations and a significantly higher prevalence of fibers lacking cytochrome oxidase (COX) activity secondary to high mtDNA mutation load, compared to age-matched healthy controls. Importantly, in healthy controls, these COX-deficient fibers, though infrequent in prevalence, exhibited a focal increase in mitochondrial biogenesis (including upregulation of mitochondrial biogenesis signals and resulting increases in mtDNA content) to try to reverse the cellular energetic insufficiency. However in COPD muscle, these fibers were much more abundant and the focal compensatory response was absent. Furthermore, our second investigation demonstrated that an endurance-training program (a potent stimulus to upregulate mitochondrial biogenesis) did not ameliorate the abnormal signaling in COX-deficient fibers and did not restore the blunted mtDNA replicative response in such fibers compared to untrained, but healthy controls. Collectively, these results point towards an impairment in mitochondrial biogenesis in COPD muscle that goes beyond that which can be ascribed to the very low physical activity seen in patients. Mitochondria have also been implicated in age-related muscle loss. As such, clinically significant loss of muscle mass and function occur with aging even in the absence of chronic disease. Dysregulated mitochondrial function and increased apoptosis have been previously implicated, particularly in fast-twitch muscle. As such, the third project investigated very old muscles with divergent fiber types and revealed that after accounting for age-related shifting in myosin heavy chain composition, mitochondria in atrophying muscles are more susceptible to initiating apoptosis irrespective of muscle fiber type composition. Furthermore, there was a marked increase in the nuclear translocation of the mitochondrial-derived pro-apoptotic factor, apoptosis inducing factor (AIF), in muscles undergoing atrophy irrespective of fiber type composition. Notably, there was no sensitization to apoptosis or change in myonuclear AIF in a muscle that did not atrophy in very advanced age (adductor longus muscle). As such, these results are consistent with the notion that mitochondrial-mediated apoptosis secondary to sensitization of the mitochondria to permeability transition is involved in the atrophy of skeletal muscle with aging and that this process is independent of the muscle fiber type composition. In summary, this thesis presents evidence of an impairment in mitochondrial biogenesis in COPD locomotor muscle secondary to impaired mtDNA replication that is not restored by exercise training. Furthermore, my results provide the first evidence that a sensitization to permeability transition and translocation of mitochondrial-derived pro-apoptotic factors occurs exclusively in atrophying fast and slow twitch muscles with aging, identifying a process that may help explain the atrophy of aging skeletal muscle irrespective of muscle fiber type composition." --
Author: Alfonso J. Cruz-Jentoft
Publisher: John Wiley & Sons
ISBN: 1119597900
Category : Medical
Languages : de
Pages : 464
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Book Description
SARCOPENIA An in-depth examination of sarcopenia’s underexplored yet widespread impact within the field of gerontology Sarcopenia is common in older men and women, and yet awareness of its clinical relevance is still relatively low. Only formally included in the International Classification of Diseases in 2016, the condition may impact societies with serious health-related and financial consequences unless consistent, effective methods of identification and management are adopted. This second edition of Sarcopenia provides geriatricians and other healthcare professionals with a revised and expanded examination of this understudied and underdiagnosed condition. Edited by two leading authorities on the subject, it covers the epidemiology and diagnosis of sarcopenia, as well as treatment options and possible prevention strategies. Eight newly written chapters build upon existing knowledge with fresh data on topics including sarcopenia’s biomarkers and its impact on the healthcare economy. This important text: Defines sarcopenia and explains its clinical relevance Covers all recent scientific evidence Outlines treatment options Considers prevention strategies Discusses sarcopenia as a public health priority Features eight new chapters covering topics such as sarcopenia’s clinical management, its biomarkers, and its financial impact Containing vital information for clinicians and other professionals working in geriatric care, nursing homes, nutrition, cancer, endocrinology, surgery, sports medicine and many other specialties, Sarcopenia, second edition, is a groundbreaking and essential new resource.
Author: Lawrence H. Lash
Publisher: Elsevier
ISBN: 1483218619
Category : Science
Languages : en
Pages : 527
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Book Description
Methods in Toxicology, Volume 2: Mitochondrial Dysfunction provides a source of methods, techniques, and experimental approaches for studying the role of abnormal mitochondrial function in cell injury. The book discusses the methods for the preparation and basic functional assessment of mitochondria from liver, kidney, muscle, and brain; the methods for assessing mitochondrial dysfunction in vivo and in intact organs; and the structural aspects of mitochondrial dysfunction are addressed. The text also describes chemical detoxification and metabolism as well as specific metabolic reactions that are especially important targets or indicators of damage. The methods for measurement of alterations in fatty acid and phospholipid metabolism and for the analysis and manipulation of oxidative injury and antioxidant systems are also considered. The book further tackles additional methods on mitochondrial energetics and transport processes; approaches for assessing impaired function of mitochondria; and genetic and developmental aspects of mitochondrial disease and toxicology. The text also looks into mitochondrial DNA synthesis, covalent binding to mitochondrial DNA, DNA repair, and mitochondrial dysfunction in the context of developing individuals and cellular differentiation. Microbiologists, toxicologists, biochemists, and molecular pharmacologists will find the book invaluable.
Author: Jaime M. Ross
Publisher: MDPI
ISBN: 3038422517
Category : Electronic book
Languages : en
Pages : 543
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Book Description
This book is a printed edition of the Special Issue "Mitochondrial Dysfunction in Ageing and Diseases" that was published in IJMS
Author: Lester Packer
Publisher: CRC Press
ISBN: 9780824717230
Category : Medical
Languages : en
Pages : 388
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Book Description
This innovative reference explores a wide selection of topics associated with aging, providing a solid understanding of the significance and molecular basis of the aging process and charting the course of future research in the area. Stresses the interplay of mitochondria, mitochondrial DNA, oxidants, and antioxidants! Featuring the research of over 55 experts in the area, Understanding the Process of Aging covers the functions of nitric oxide and peroxynitrite in mitochondria integrates several views on the role of mitochondria in the development of apoptosis gives a quantitative analysis of mutations of mitochondrial DNA during human aging highlights mitochondrial free radical production introduces new roles of ubiquinone in mitochondrial functions offers new antioxidant-based complementary therapeutic strategies details aspects of intact cells and whole organisms in health and disease and more! Featuring over 1800 references, tables, drawings, and photographs, Understanding the Process of Aging benefits nutritionists and dieticians, geriatricians, cell and molecular biologists, chemists and biochemists, pharmacologists, biotechnologists, neurologists, cardiologists, oncologists, dermatologists, and graduate and medical school students in these disciplines.
Author: Saskia Gehrig
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Institute of Medicine
Publisher: National Academies Press
ISBN: 0309172810
Category : Technology & Engineering
Languages : en
Pages : 448
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Book Description
It is a commonly held belief that athletes, particularly body builders, have greater requirements for dietary protein than sedentary individuals. However, the evidence in support of this contention is controversial. This book is the latest in a series of publications designed to inform both civilian and military scientists and personnel about issues related to nutrition and military service. Among the many other stressors they experience, soldiers face unique nutritional demands during combat. Of particular concern is the role that dietary protein might play in controlling muscle mass and strength, response to injury and infection, and cognitive performance. The first part of the book contains the committee's summary of the workshop, responses to the Army's questions, conclusions, and recommendations. The remainder of the book contains papers contributed by speakers at the workshop on such topics as, the effects of aging and hormones on regulation of muscle mass and function, alterations in protein metabolism due to the stress of injury or infection, the role of individual amino acids, the components of proteins, as neurotransmitters, hormones, and modulators of various physiological processes, and the efficacy and safety considerations associated with dietary supplements aimed at enhancing performance.
