Download or read book Cardioprotective Mechanisms Targeting Thiol Redox Homeostasis and Mitochondrial Bioenergetics written by Rick Alleman and published by . This book was released on 2016 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coronary heart disease is a leading cause of death in the United States, totaled mostly by deaths associated with myocardial infarction and fatal ventricular arrhythmias. The inability to predict the occurrence of these pathologies due to their sudden and transient etiologies has hindered successful translation of therapies to the clinic. Given the multi-billion-dollar economic burden that cardiovascular disease exerts, it would be beneficial to further our knowledge on ways to better treat acute coronary syndromes. The goal of this work is to determine how mitochondria impact cardiac ischemia/reperfusion (I/R) injury, and to identify potential mechanisms to therapeutically target. The studies within were conducted on treadmill-trained male rats, ex vivo heart preparations, isolated/cell cultures, and isolated mitochondria. Herein demonstrates a strong link between susceptibility to I/R injury and cardioprotection through the manipulation of mitochondrial thiol status. Hearts from exercised rats were better protected from ischemic insults, and this coincided with preserved thiol redox homeostasis and greater stability in mitochondrial bioenergetics. The maintenance of mitochondria thiol was demonstrated through preservation of glutathione, which is a key redox control point in cardiac bioenergetics. When the thiol pool becomes more oxidized following oxidative stress, loss of mitochondrial membrane potential and collapsed bioenergetics increase susceptibility to I/R injury. Glutathione reductase helps maintain cell redox homeostasis by maintaining glutathione in a reduced form, where it can be utilized in ROS scavenging and redox signaling. In cell models of hypoxia/reoxygenation, targeting glutathione reductase expression influences the cells sensitivity to mitochondrial dysfunction. Several hallmark features of the cardioprotective phenotype include reductions in myocardial infarction, resistance to arrhythmic stimuli, lower ROS accumulation, and preserved mitochondrial function. Taken together, data from the studies suggest that targeting mitochondrial function during I/R, and more specifically, targeting mitochondrial thiol homeostasis, may have beneficial affects on treating coronary heart disease symptoms.
Download or read book Mitochondrial Biology and Experimental Therapeutics written by Paulo J. Oliveira and published by Springer. This book was released on 2018-03-21 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the therapeutic strategies to target mitochondrial metabolism in diseases where the function of that organelle is compromised, and it discusses the effective strategies used to create mitochondrial-targeted agents that can become commercially available drug delivery platforms. The consistent growth of research focused in understanding the multifaceted role of mitochondria in cellular metabolism, controlling pathways related with cell death, and ionic/redox regulation has extended the research of mitochondrial chemical-biological interactions to include various pharmacological and toxicological applications. Not only does the book extensively cover basic mitochondrial physiology, but it also links the molecular interactions within these pathways to a variety of diseases. It is one of the first books to combine state-of-the-art reviews regarding basic mitochondrial biology, the role of mitochondrial alterations in different diseases, and the importance of that organelle as a target for pharmacological and non-pharmacological interventions to improve human health. The different chapters highlight the chemical-biological linkages of the mitochondria in context with drug development and clinical applications.
Download or read book The Heart written by Lionel H. Opie and published by Lippincott Williams & Wilkins. This book was released on 1998 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clinical cardiac physiology for residents and practitioners. Halftone and color illustrations and tables.
Download or read book Mitochondria and the Heart written by José Marín-García and published by Springer Science & Business Media. This book was released on 2005-05-05 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mitochondria have been pivotal in the development of some of the most important ideas in modern biology. Since the discovery that the organelle has its own DNA and specific mutations were found in association with neuromuscular and cardiovascular diseases and with aging, an extraordi-nary number of publications have followed, and the term mitochondrial medicine was coined. Furthermore, our understanding of the multiple roles that mitochondria play in cardiac cell homeostasis opened the door for intensive experimentation to understand the pathogenesis and to find new treatments for cardiovascular diseases. Besides its role in adenosine triphosphate generation, mitochondria regu-late a complex network of cellular interactions, involving (1) generation and detoxification of reactive oxygen species, including superoxide anion, hy-drogen peroxide, and hydroxyl radical; (2) maintenance of the antioxidant glutathione in a reduced state and adequate level of mitochondrial matrix superoxide dismutase; (3) cytoplasmic calcium homeostasis, particularly under conditions of cellular calcium loading; (4) transport of metabolites between cytoplasm and matrix; (5) both programmed (apoptosis) and necrotic cell death; and (6) cell growth and development. It is therefore not surprising that this organelle has come to be the center stage in many current investigations of cardiovascular diseases, aging, and agi- related disease. Concomitant with these advances, an impressive effort is under- way for the development of new tools and methodologies to study mitochondrial structure and function, including powerful ways to visualize, monitor, and alter the organelle function to assess the genetic consequences of these perturbations.
Download or read book Mitochondrial Dysfunction Caused by Drugs and Environmental Toxicants written by Yvonne Will and published by John Wiley & Sons. This book was released on 2018-03-23 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed as a one-stop reference source for drug safety and toxicology professionals, this book explains why mitochondrial failure is a crucial step in drug toxicity and how it can be avoided. • Covers both basic science and applied technology / methods • Allows readers to understand the basis of mitochondrial function, the preclinical assessments used, and what they reveal about drug effects • Contains both in vitro and in vivo methods for analysis, including practical screening approaches for drug discovery and development • Adds coverage about mitochondrial toxicity underlying organ injury, clinical reports on drug classes, and discussion of environmental toxicants affecting mitochondria
Download or read book Advances in Mitochondrial Medicine written by Roberto Scatena and published by Springer Science & Business Media. This book was released on 2012-03-08 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mitochondria are far more than the “powerhouse” of the cell as they have classically been described. In fact, mitochondria biological activities have progressively expanded to include not only various bioenergetic processes but also important biosynthetic pathways, calcium homeostasis and thermogenesis, cell death by apoptosis, several different signal transduction pathways mainly related to redox control of gene expression and so on. This functional and structural complexity may undergo important derangements so to justify the definition of ‘mitochondrial medicine’, which should include all the clinical consequences of congenital or acquired mitochondrial dysfunctions. There are actually a growing number of studies which assign a significant pathogenic role to damaged mitochondria in different diseases: ischemia/reperfusion injury, neurodegenerative diseases, cancer with its dramatic sequelae (i.e, metastasis), metabolic syndrome, hyperlipidemias, just to mention a few of the most important pathologies. In this context, a further aspect that should not be disregarded is the interaction of pharmacological agents with mitochondria, not only in regard of the toxicological aspects but, above all, of the potential therapeutic applications. In fact, it is interesting to note that, while the properties of different so-called “mitoxicants” are well-known, the subtle linkages between drugs and mitochondria is still in need of a real pharmacological and therapeutic control at the clinical level. This lack of consideration can often lead to an underestimation of unwanted toxic effects but also of desirable therapeutic activities. A reevaluation of the potential clinical role of mitochondria could give a new light on some yet obscure aspects of human pathophysiology.
Download or read book Cardiac Mechano electric Feedback and Arrhythmias written by Peter Kohl and published by Saunders. This book was released on 2005 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kohl (Cardio Mechano-Electric Feedback Lab, Oxford University) documents the role of mechano-electric feedback (MEF) in electrical and mechanical pathological remodeling of cardiac function. Sections cover sub-cellular mechanisms of cardiac MEF, effects of MEF on cardiac cellular electrophysiology, experimental manifestations of MEF in the heart, cardiac MEF in normal physiology, cardiac MEF as a pathogenic mechanism, MEF as a mechanism involved in therapeutic interventions, and the outlook for the future. B&w and color photos and medical images are included. Annotation: 2005 Book News, Inc., Portland, OR (booknews.com).
Download or read book Acute Heart Failure written by Alexandre Mebazaa and published by Springer Science & Business Media. This book was released on 2009-12-24 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt: For many years, there has been a great deal of work done on chronic congestive heart failure while acute heart failure has been considered a difficult to handle and hopeless syndrome. However, in recent years acute heart failure has become a growing area of study and this is the first book to cover extensively the diagnosis and management of this complex condition. The book reflects the considerable amounts of new data reported and many new concepts which have been proposed in the last 3-4 years looking at the epidemiology, diagnostic and treatment of acute heart failure.
Download or read book Mitochondrial Oxidative Phosphorylation written by Bernhard Kadenbach and published by Springer Science & Business Media. This book was released on 2012-06-23 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will describe the nuclear encoded genes and their expressed proteins of mitochondrial oxidative phosphorylation. Most of these genes occur in eukaryotic cells, but not in bacteria or archaea. The main function of mitochondria, the synthesis of ATP, is performed at subunits of proton pumps (complexes I, III, IV and V), which are encoded on mitochondrial DNA. The nuclear encoded subunits have mostly a regulatory function. However, the specific physiological functions of the nuclear encoded subunits of complexes I, III, IV, and V are mostly unknown. New data indicates that they are essential for life of higher organisms, which is characterized by an adult life without cell division (postmeiotic stage) in most tissues, after the juvenile growth. For complex IV (cytochrome c oxidase) some of these subunits occur in tissue-specific (subunits IV, VIa, VIb, VIIa, VIII), developmental-specific (subunits IV, VIa, and VIIa) as well as species-specific isoforms. Defective genes of some subunits were shown to induce mitochondrial diseases. Mitochondrial genes and human diseases will also be covered.
Download or read book Oxidative Stress in Heart Diseases written by Sajal Chakraborti and published by Springer Nature. This book was released on 2019-11-06 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book bridges the gap between fundamental and translational research in the area of heart disease. It describes a multidisciplinary approach, and demonstrates biochemical mechanisms associated with dysregulation of redox signaling, which leads heart disease. Presenting recent studies on improved forms of ROS scavenging enzymes; specific inhibitors for different ROS generating enzymes; and oxidant induced signaling pathways and their antagonists that allow subtle modulation of redox signaling, it also discusses the spatial and temporal aspects of oxidative stress in the cardiovascular system, which are of vital importance in developing better strategies for treating heart disease. Each chapter offers researchers valuable insights into identifying targets for drug development for different types of heart disease.
Download or read book The Changing Faces of Glutathione a Cellular Protagonist written by Alfonso Pompella and published by Frontiers Media SA. This book was released on 2015-07-17 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glutathione (GSH) has been described for a long time just as a defensive reagent against the action of toxic xenobiotics (drugs, pollutants, carcinogens), both directly and as a cofactor for GSH transferases. As a prototype antioxidant, it has been involved in cell protection from the noxious effect of excess oxidant stress, both directly and as a cofactor of glutathione peroxidases. In addition, it has long been known that GSH is capable of forming disulfide bonds with cysteine residues of proteins, and the relevance of this mechanism ("S-glutathionylation") in regulation of protein function has been well documented in a number of research fields. Rather paradoxically, it has also been highlighted that GSH—and notably its catabolites, as originated by metabolism by gamma-glutamyltransferase—can promote oxidative processes, by participating in metal ion-mediated reactions eventually leading to formation of reactive oxygen species and free radicals. Also, a fundamental role of GSH has been recognized in the storage and transport of nitric oxide (NO), in the form of S-nitrosoglutathione (GSNO). The significance of GSH as a major factor in regulation of cell life, proliferation, and death, can be regarded as the integrated result of all these roles, as well as of more which are emerging in diverse fields of biology and pathophysiology. Against this background, modulation of GSH levels and GSH-related enzyme activities represents a fertile field for experimental pharmacology in numerous and diverse perspectives of animal, plant and microbiologic research. This research topic includes 14 articles, i.e. 4 Opinion Articles, 6 Reviews, and 4 Original Research Articles. The contributions by several distinguished research groups, each from his own standpoint of competence and expertise, provide a comprehensive and updated view over the diverse roles, the changing faces of GSH and GSH-related enzymes in cell’s health, disease and death.
Download or read book Thyroid and Heart written by Giorgio Iervasi and published by Springer Nature. This book was released on 2020-03-19 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, several scientific papers have highlighted the role of the thyroid system in cardioprotection, and several clinical studies – including multicenter studies – have identified the role of thyroid hormones (TH) in the development and progression of cardiovascular disease, making an update of TH and heart relationship both necessary and timely. This second edition of Thyroid and Heart failure provides a careful and updated review of the experimental, clinical and epidemiological results in the field of TH and heart failure, with a particular focus on the translational - bench to bedside - significance of the obtained results. It discusses topics such as the molecular, structural, functional, cellular and histological cardiac changes; the reversibility of these changes with TH replacement therapy; the systemic effects – kidney, hormonal pathways systems, brain, muscle, etc – of altered TH metabolism in HF, as well as the clinical and prognostic implications. The section devoted to the potential therapeutic treatments has been expanded. Thanks to its translational approach to this highly complex subject, the book will be of interest to a broad readership, including cardiologists, endocrinologists and internists.
Download or read book The Sublime Engine written by Stephen Amidon and published by Rodale Books. This book was released on 2012-01-17 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The heart has consistently captured the human imagination. It has been singled out as a cultural icon, the repository of our deepest religious and artistic impulses, the organ whose steady functioning is understood, both literally and symbolically, as the very life force itself. The Sublime Engine will explore the profound sense of awe every person feels when they ponder the miracle encased within their ribs. In this lyrical history of our most essential organ, a critically-acclaimed novelist and a leading cardiologist--who happen to be brothers--draw upon history, science, religion, popular culture, and literature to illuminate all of the heart's physical and figurative chambers. Each of the four sections-- The Ancient Heart, The Renaissance Heart, The Modern Heart, and The Future Heart--will focus on a major epoch in our understanding of the heart and the hidden history of cardiology. Erudite, witty, and enthralling, The Sublime Engine makes the heart come alive for readers.
Download or read book Melatonin written by Cristina Manuela Drăgoi and published by BoD – Books on Demand. This book was released on 2018-11-21 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Melatonin, the pineal neurohormone, is a pleiotropic molecule acting in the center of the integrative molecular mechanisms of the organism, based on interconnections of the regulatory systems: neural, endocrine, immune, and genetic, conveying into the uniqueness of human architecture. This book provides a systematic and updated overview of melatonin biochemical mechanisms of action, pharmacological features, and clinical uses, clutching the subject with complete details of pharmaceutical formulations designed for different routes of administration and different health issues, aiming at optimal melatonin bioavailability when therapeutically delivered. The book addresses a broad range of audiences, from healthcare professionals, medically and pharmaceutically based, to highly profiled medical specialists and biomedical researchers, helping them to expand their knowledge of the physiological and pathological implications of melatonin and its metabolites.
Download or read book The Exocrine Pancreas written by Stephen Pandol and published by Morgan & Claypool Publishers. This book was released on 2011 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: The secretions of the exocrine pancreas provide for digestion of a meal into components that are then available for processing and absorption by the intestinal epithelium. Without the exocrine pancreas, malabsorption and malnutrition result. This chapter describes the cellular participants responsible for the secretion of digestive enzymes and fluid that in combination provide a pancreatic secretion that accomplishes the digestive functions of the gland. Key cellular participants, the acinar cell and the duct cell, are responsible for digestive enzyme and fluid secretion, respectively, of the exocrine pancreas. This chapter describes the neurohumoral pathways that mediate the pancreatic response to a meal as well as details of the cellular mechanisms that are necessary for the organ responses, including protein synthesis and transport and ion transports, and the regulation of these responses by intracellular signaling systems. Examples of pancreatic diseases resulting from dysfunction in cellular mechanisms provide emphasis of the importance of the normal physiologic mechanisms.
Download or read book Oxidative Stress and Hormesis in Evolutionary Ecology and Physiology written by David Costantini and published by Springer Science & Business Media. This book was released on 2014-03-27 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses oxidative stress and hormesis from the perspective of an evolutionary ecologist or physiologist. In the first of ten chapters, general historical information, definitions, and background of research on oxidative stress physiology, hormesis, and life history are provided. Chapters 2-10 highlight the different solutions that organisms have evolved to cope with the oxidative threats posed by their environments and lifestyles. The author illustrates how oxidative stress and hormesis have shaped diversity in organism life-histories, behavioral profiles, morphological phenotypes, and aging mechanisms. The book offers fascinating insights into how organisms work and how they evolve to sustain their physiological functions under a vast array of environmental conditions.
Download or read book Chemistry Biochemistry and Pharmacology of Hydrogen Sulfide written by Philip K. Moore and published by Springer. This book was released on 2015-07-10 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book puts hydrogen sulfide in context with other gaseous mediators such as nitric oxide and carbon monoxide, reviews the available mechanisms for its biosynthesis and describes its physiological and pathophysiological roles in a wide variety of disease states. Hydrogen sulfide has recently been discovered to be a naturally occurring gaseous mediator in the body. Over a relatively short period of time this evanescent gas has been revealed to play key roles in a range of physiological processes including control of blood vessel caliber and hence blood pressure and in the regulation of nerve function both in the brain and the periphery. Disorders concerning the biosynthesis or activity of hydrogen sulfide may also predispose the body to disease states such as inflammation, cardiovascular and neurological disorders. Interest in this novel gas has been high in recent years and many research groups worldwide have described its individual biological effects. Moreover, medicinal chemists are beginning to synthesize novel organic molecules that release this gas at defined rates with a view to exploiting these new compounds for therapeutic benefit.
