Cellular Implications Of Redox Signaling

Redox regulation, like phosphorylation, is a covalent regulatory system that controls many of the normal cellular functions of all living cells and organisms. In addition, it controls how cells respond to stress involving oxidants and free radicals, which underlie many degenerative diseases. This area is undergoing a transition from general knowledge to specific description of the components and mechanisms involved. This invaluable book provides a timely basic description of a field whose relevance to cell biology and degenerative diseases is of the utmost importance. It describes the state of the art, lays the foundations for understanding the reactions involved, and presents the prospects for future developments. It can serve as a basic text for any undergraduate or graduate course that deals with redox regulation, oxidative stress and free radicals under normal and pathological conditions in bacterial, plant and animal cells. Contents:The Role of Thioredoxin and Glutaredoxin Systems in Disulfide Reduction and Thiol Redox ControlSelenocysteine Insertion and Reactivity: Mammalian Thioredoxin Reductases in Relation to Cellular Redox SignalingIron–Sulfur Proteins: Properties and FunctionsThe Ferredoxin Ferredoxin/Thioredoxin Thioredoxin System. A Light-Dependent Redox Regulatory System in Oxygenic Photosynthetic CellsThioredoxin and Redox Regulation: Beginnings in Photosynthesis Lead to a Role in Germination and Improvement of CerealsThe Role of Thioredoxin in Regulatory Cellular FunctionsProtein S-Thiolation, S-Nitrosylation, and Irreversible Sulfhydryl Oxidation: Roles in Redox RegulationRadical Scavenging by Thiols: Biological Significance and Implications for Redox Signaling and Antioxidant DefenseAscorbate and Glutathione Metabolism in Plants: H2O2-Processing and SignalingDisulfide Bond Formation in the Periplasm and Cytoplasm of Escherichia ColiThe Thiol Redox Paradox in the Requirement for Disulfide Isomerization in the Eukaryotic Endoplasmic ReticulumMechanisms Controlling Redox Balance in Cells. Inhibition of Thioredoxin and of Thioredoxin ReductaseRegulatory Disulfides Controlling Transcription Factor Activity in the Bacterial and Yeast Responses to Oxidative StressRedox Signaling During Light-Regulated Translation in ChloroplastsRegulation of mRNA Translation and Stability in Iron Metabolism: Is There a Redox Switch?Redox Flow as an Instrument for Gene RegulationThe Permeability Transition Pore as Source and Target of Oxidative Stress Readership: Researchers and graduate students in the life sciences, especially biochemistry.

This first entry-level guide to the multifaceted field takes readers one step further than existing textbooks. In an easily accessible manner, the authors integrate the biochemistry, cell biology and medical implications of intracellular redox processes, demonstrating that complex science can be presented in a clear and almost entertaining way. Perfect for students and junior researchers, this is an equally valuable addition to courses in biochemistry, molecular biology, cell biology, and human physiology.

Presents recent developments in the rapidly expanding field of redox regulation research. The book examines insights into intracellular communication and new techniques for diagnosing and treating diseases associated with oxidation and reduction. It focuses on important cellular mechanisms, such as redox reactions related to thioredoxin (TRX)/adult

This volume, along with its companion (volume 474), presents methods and protocols dealing with thiol oxidation-reduction reactions and their implications as they relate to cell signaling. The critically acclaimed laboratory standard for 40 years, Methods in Enzymology is one of the most highly respected publications in the field of biochemistry. Since 1955, each volume has been eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. Over 450 volumes have been published to date, and much of the material is relevant even today--truly an essential publication for researchers in all fields of life sciences. Along with companion volume, provides a full overview of techniques necessary to the study of thiol redox in relation to cell signaling Gathers tried and tested techniques from global labs, offering both new and tried-and-true methods Relevant background and reference information given for procedures can be used as a guide to developing protocols in a number of disciplines

This volume addresses oxidant-reduction or redox and antioxidant sensitive molecular mechanisms and how they are implicated in different disease processes. Possible strategies to pharmacologically and/or nutritionally manipulate such redox-sensitive molecular responses are emphasized. Reactive species as intracellular messengers Redox regulation of cellular responses Clinical implications of redox signaling and antioxidant therapy

Once believed to be involved mainly with energetics, including the production of ATP, knowledge of the role of redox in the control of cellular activity has been expanded over recent years. In Redox-Mediated Signal Transduction: Methods and Protocols, experienced researchers with backgrounds in both the plant and animal sciences contribute timely methods and techniques that can be used to study this important aspect of biology. Beginning with an overview and methods for measuring compounds that affect redox and the redox state of cells, the book continues with reviews of the use of GFP and its derivatives, methods to study the impact of changing redox on proteins, and methods to study the exact molecular changes that may underlie the mechanisms of action of altering redox, among other subjects. As a volume in the highly successful Methods in Molecular BiologyTM series, chapters include step-by-step, readily reproducible protocols, lists of the necessary materials and reagents, and tips on troubleshooting and avoiding known pitfalls. Cutting-edge and easy to use, Redox-Mediated Signal Transduction: Methods and Protocols is an ideal reference for those who wish to enter this exciting area of research as well as for those who simply wish for a more thorough understanding of the dramatic impact of redox in the control of cellular function.

Poised at the convergence of most catabolic and anabolic pathways, mitochondria are the center of heterotrophic aerobic life, representing a hub in the overall metabolic network of cells. The energetic functions performed by mitochondria face the unavoidable redox hurdle of handling huge amounts of oxygen while keeping its own as well as the cellular redox environment under control. Reactive oxygen species (ROS) are produced in the respiratory chain as a result of the energy supplying function of mitochondria. Originally considered an unavoidable by-product of oxidative phosphorylation, ROS have become crucial signaling molecules when their levels are kept within physiological range. This occurs when their production and scavenging are balanced within mitochondria and cells. Mitochondria-generated hydrogen peroxide can act as a signaling molecule within mitochondria or in the cytoplasm, affecting multiple networks that control, for example, cell cycle, stress response, cell migration and adhesion, energy metabolism, redox balance, cell contraction, and ion channels. However, under pathophysiological conditions, excessive ROS levels can happen due to either overproduction, overwhelming of antioxidant defenses, or both. Under oxidative stress, detrimental effects of ROS include oxidation of protein, lipids, and nucleic acids; mitochondrial depolarization and calcium overload; and cell-wide oscillations mediated by ROS-induced ROS release mechanisms. Mitochondrial dysfunction is central in the pathogenesis of numerous human maladies including cardiomyopathies and neurodegeneration. Diseases characterized by altered nutrient metabolism, such as diabetes and cancer, exhibit elevated ROS levels. These may contribute to pathogenesis by increasing DNA mutation, affecting regulatory signaling and transcription, and promoting inflammation. Under metabolic stress, several ionic channels present in the inner and outer mitochondrial membranes can have pro-life and -death effects. In the present E-book, based on the Frontiers Research Topic entitled: "Mitochondria: Hubs of cellular signaling, energetics and redox balance", we address one of the fundamental questions that the field of ROS biology faces today: how do mitochondria accomplish a reliable energy provision and at the same time keep ROS levels within physiological, non-harming, limits but crucial for cellular signaling function? Additionally, and within the perspective of mitochondria as signaling-energetic hubs in the extensive cellular metabolic network, we ask how can their collective dynamics scale from the subcellular to the cellular, tissue and organ levels to affect function in health and disease.

Oxidative Stress: Eustress and Distress presents current knowledge on oxidative stress within the framework of redox biology and translational medicine. It describes eustress and distress in molecular terms and with novel imaging and chemogenetic approaches in four sections: A conceptual framework for studying oxidative stress. Processes and oxidative stress responses. Signaling in major enzyme systems (oxidative eustress), and damaging modification of biomolecules (oxidative distress). The exposome addresses lifelong exposure and impact on health, nutrient sensing, exercise and environmental pollution. Health and disease processes, including ischemia-reperfusion injury, developmental and psychological disorders, hepatic encephalopathy, skeletal muscle disorders, pulmonary disease, gut disease, organ fibrosis, and cancer. Oxidative Stress: Eustress and Distress is an informative resource useful for active researchers and students in biochemistry, molecular biology, medicinal chemistry, pharmaceutical science, nutrition, exercise physiology, analytical chemistry, cell biology, pharmacology, clinical medicine, and environmental science. Characterizes oxidative stress within the framework of redox biology, redox signaling, and medicine. Empowers researchers and students to quantify specific reactants noninvasively, identify redox biomarkers, and advance translational studies. Features contributions from international leaders in oxidative stress and redox biology research.