Download or read book Lipid Hydroperoxide Derived Modification of Biomolecules written by Yoji Kato and published by Springer Science & Business Media. This book was released on 2013-12-28 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lipid peroxidation is an important cellular process which can lead to detrimental effects if it is not regulated efficiently. Lipid hydroperoxide is formed in an initial step of lipid peroxidation. Lipid hydroperoxide is also known as a potential source of singlet oxygen. Harmful aldehydes are formed when the lipid hydroperoxide is degraded. The formed aldehyde has high reactivity against thiol or amine moieties. Therefore, it could act as a signaling molecule, which might induce the changing of gears inside a cell. Recent studies have shown that lipid hydroperoxide or a slightly modified product of the lipid hydroperoxide reacts with biomolecules such as proteins and aminophospholipids, which leads to formation of amide-type adducts. Amide-type adducts could be one of markers for oxidative stress and could also be an important player in some diseases. In this book, the chemistry and biochemistry of lipid hydroperoxide along with their conjugates with biomolecules are described.

Download or read book Measuring Oxidants and Oxidative Stress in Biological Systems written by Lawrence J. Berliner and published by Springer Nature. This book was released on 2020-08-08 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Tandem Mass Spectrometric Analysis of Protein and Peptide Adducts of Lipid Peroxidation derived Aldehydes written by Jianyong Wu and published by . This book was released on 2010 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The adduction of proteins and other biomolecules by electrophilic lipid peroxidation products such as 4-hydroxy-2-nonenal (HNE), 4-oxo-2-nonenal (ONE), malondialdehyde (MDA) or acrolein (ACR) is thought to be an initiating and/or propagating factor in the pathophysiology of several diseases such as atherosclerosis, diabetes, Alzheimer's, Parkinson's and other age-related disorders. The identification of protein sites modified by oxylipids is of key relevance for advancing our understanding how oxidative damage affects structure and function of proteins. Here, the use of MALDI tandem mass spectrometry with high energy collision-induced dissociation (CID) on a TOF/TOF instrument for sequencing oxylipid-peptide conjugates was systematically studied. Three synthesized model peptides containing one nucleophilic residue (i.e. Cys, His or Lys) were reacted with MDA, HNE, ONE and ACR. MALDI-MS analysis and MS/MS analysis were performed to confirm the adduct type and the modification sites. Michael adducts and Schiff bases were the predominant products under pH 7.4 within 2 hours. All MS/MS spectra of Michael adducts show the neutral loss of the oxylipid moiety ions. MS/MS spectra of Cys-containing peptide oxylipid conjugates exhibit additional characteristic neutral loss of HS-oxylipid moiety ions. MS/MS spectra of His-containing peptide oxylipid conjugates show characteristic oxylipid-containing His immonium ions. Spectra of Lys-containing peptide oxylipid conjugates (Schiff base) also show oxylipid-containing Lys immonium ions. However, there is no neutral loss of the oxylipid moiety ion for these Schiff bases. Determining the extent or relative amounts of the oxidative damage in cells could provide valuable insights into the molecular mechanisms of the diseases caused by oxidative stress. Relative quantitation of oxylipid-modified proteins in biological samples is a challenging problem because of the complexity and extreme dynamic range that characterize these samples. In this study, the reagents, N'-aminooxymethylcarbonylhydrazino-D-biotin (ARP) and iodoacetyl-PEO2- biotin (IPB), were used to enrich acrolein-modified Cys-containing peptides and the corresponding unmodified ones from subsarcolemmal mitochondria (SSM). The ratios between them were determined by nanoLC-SRM analysis. Model Cys-containing peptides labeled with ARP-acrolein and IPB were employed to demonstrate this method. Seven acrolein-modifed Cys-containing peptides from five mitochondrial proteins were quantified. The ratios for those seven peptides from the CCl4-treated rats are higher than the control ones indicating that the ratios of acrolein-modified peptides to unmodified ones are potential markers of oxidative stress in vivo. Age-dependent changes of protein carbonyls were investigated in subsarcolemmal mitochondria by using LC-SRM analysis of distinct ACR-modified Cys-containing peptides. Immunochemical analysis using an anti-ACR monoclonal antibody supported an increase of proteins modified by acrolein with age. However, total protein carbonyls measurement using ARP in Western blot analysis did not conform to this change suggesting that age-related changes in protein carbonyls are complex and would benefit from more specific measurement protocols.

Download or read book Reactive Species Detection in Biology written by Frederick A. Villamena and published by Elsevier. This book was released on 2016-10-23 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reactive Species Detection in Biology: From Fluorescence to Electron Paramagnetic Resonance Spectroscopy discusses the reactive oxygen species that have been implicated in the pathogenesis of various diseases, presenting theories, chemistries, methodologies, and various applications for the detection of reactive species in biological systems, both in-vitro and in-vivo. Techniques covered include fluorescence, high performance chromatography, mass spectrometry, immunochemistry, and electron paramagnetic resonance spectroscopy. Probe design and development are also reviewed in order to advance new approaches in radical detection through synthesis, computations, or experimental applications. Reviews all current advances in radical detection Emphasizes chemical structures and reaction schemes fundamental to radical detection and identification Describes the uses, advantages, and disadvantages of various probe designs Examines new approaches to radical probe development

Download or read book Accenting Lipid Peroxidation written by Pınar Atukeren and published by BoD – Books on Demand. This book was released on 2021-12-08 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lipid peroxidation can occur via either enzymatic or nonenzymatic reactions due to excess production of free radical molecules. This process culminates in cellular damage causing various diseases. This book examines lipid peroxidation as a current and future biomarker of oxidative stress.

Download or read book Biomarkers in Environmental and Human Health Biomonitoring written by Ritu Mishra and published by Elsevier. This book was released on 2024-06-05 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomarkers in Environmental and Human Health Biomonitoring: An Integrated Perspective provides a holistic view of the biomonitoring of environmental degradation, accumulated toxicity, and associated human health concerns. The book incorporates theoretical and practical aspects of the biomonitoring of environmental pollution and the health surveillance of ecological communities using samples from living organisms which are analyzed for contaminants and toxin levels. In the first half, the book provides a general overview if the different types of biomarkers, their significance as bioindicators for contaminants and detection of toxicity, as well as how they can be utilized in the restoration of degraded ecosystems. The second half of the book discusses molecular biomarkers and how they are used as diagnostic and prognostic tools for pollution monitoring. It also reviews analytical tools used to validate the biomarkers in the detection and monitoring of pollution and disease. Finally, the book delves into how novel approaches like genetic ecotoxicology; Big Data, and artificial intelligence calculates the potential consequences of environmental pollution on the ecosystems and on human health. Covers the fundamentals, types, significance, and limitations of biomarkers Examines various types of plants, animals, and secondary metabolites in identifying and monitoring toxicity in different ecosystems and potential impacts on health Reviews biomarker-based and bioinformatic tools in the detection and monitoring of environmental pollution and associated human health

Download or read book Radiation induced and oxidative DNA damages written by Antonio Monari and published by Frontiers Media SA. This book was released on 2015-10-02 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: DNA stores and passes the genetic information of almost all living organisms. Its molecular structure and their intramolecular interactions are particularly suitable to maximize stability against oxidative stress and UV-light absorption. Yet the protection and repair strategies are still error-prone: DNA lesions are produced, including the most complex and highly mutagenic ones. An important threat to DNA stability comes from photosensitization, i.e. from the dramatic multiplication of radiation-induced defects mediated by the presence of organic or organometallic dyes compared to the direct exposure to UVA radiation. Moreover, the photo-induced production of singlet oxygen generates an extremely high oxidative stress on DNA that, in vivo, normally results in extended cellular apoptosis. Elucidating the processes leading to DNA damages, from the production of a simple radical entity to deleterious lesions, as well as the opportunities of repair by devoted enzymes, is a cornerstone towards the development of more efficient protection strategies. Sensitization and selective production of DNA lesions can also be exploited to induce the selective apoptosis of cancer cells upon exposition to radiation or to oxidative stress, for instance in the field of photodynamic therapy. The importance and relevance of the field is witnessed by the impressive amount of high-level papers dealing with this complex subject, and notably tackling the structural elucidation of DNA and DNA-drug adducts, the mechanisms of formation of DNA lesions (including the precise detection of the final lesion products), as well as the influence of the lesions on the DNA stability and dynamics and the consequences on the ease of repair. Due to the complexity of the field lying at the frontiers between chemistry, physics and biology, multidisciplinary strategies allying modeling and experience are needed. This topic aims at giving an extended overview of the current research in the domain, with fundamental contribution from the leading groups in the field of DNA reactivity, structural characterization, photo-chemistry and photo-physics, as well as repair mechanism. It will therefore be a fundamental guide for scientists wanting to address the field of DNA lesion and repair, but also more generally for researchers working in rational drug design or in the development of biomarkers and medical imaging techniques

Download or read book Specialised membrane domains of plasmodesmata plant intercellular nanopores written by Jens Tilsner and published by Frontiers E-books. This book was released on 2014-12-17 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasmodesmata (PD) are plant-specific intercellular nanopores defined by specialised domains of the plasma membrane (PM) and the endoplasmic reticulum (ER), both of which contain unique proteins, and probably different lipid compositions than the surrounding bulk membranes. The PD membranes form concentric tubules with a minimal outer diameter of only 50 nm, and the central ER strand constricted to ~10-15 nm, representing one of the narrowest stable membrane tubules in nature. This unique membrane architecture poses many biophysical, structural and functional questions. PM continuity across PD raises the question as to how a locally confined membrane site is established and maintained at PD. There is increasing evidence that the PM within PD may be enriched in membrane ‘rafts’ or TET web domains. Lipid rafts often function as signalling platforms, in line with the emerging view of PD as central players in plant defense responses. Lipid-lipid immiscibility could also provide a mechanism for membrane sub- compartmentalisation at PD. Intricate connections of the PM to the wall and the underlying cytoskeleton and ER may anchor the specialised domains locally. The ER within PD is even more strongly modified. Its extreme curvature suggests that it is stabilised by densely packed proteins, potentially members of the reticulon family that tubulate the cortical ER. The diameter of the constricted ER within PD is similar to membrane stalks in dynamin-mediated membrane fission during endocytosis and may need to be stabilised against spontaneous rupture. The function of this extreme membrane constriction, and the reasons why the ER is connected between plant cells remain unknown. Whilst the technically challenging search for the protein components of PD is ongoing, there has been significant recent progress in research on biological membranes that could benefit our understanding of PD function. With this Research Topic, we therefore aim to bring together researchers in the PD field and those in related areas, such as membrane biophysics, membrane composition and fluidity, protein-lipid interactions, lateral membrane heterogeneity, lipid rafts, membrane curvature, and membrane fusion/fission. We wish to address questions such as: - What mechanisms restrict lateral mobility of proteins and lipids along the PD membranes? - How can specific proteins be targeted to and turned over from membrane domains with restricted lateral access? - What elements (lipids, proteins, membrane curvature, packing order, thickness etc.) may contribute to the identity of PD membranes? - How do the structural and functional features of PD compare to other ER-PM contact sites? - How is the high curvature of the PD ER stabilised and what are possible functions of such a tightly constricted membrane tubule? - Do PD need to be prevented from spontaneous collapse and sealing? - What technologies are available to address these questions that can underpin PD research? We welcome interested individuals to contribute their expertise and develop new hypotheses on the particular biological and biophysical questions posed by PD. We are particularly looking for articles (Original Research Articles, Technical Advances and State-of-the-Art reviews) that would expand on or challenge current perceptions of PD and stimulate discussion.

Download or read book Oxidative Stress Biomarkers and Antioxidant Protocols written by Donald Armstrong and published by Springer Science & Business Media. This book was released on 2008-02-04 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first protocols book, Free Radical and Antioxidant Protocols (1) was published in late 1998. Sections were divided into three parts, covering selected biochemical techniques for measuring oxidative stress, antioxidant (AOX) activity, and combined applications. In choosing the 40 methods to be included in that book, I realized there were considerably more of equal value than that which we could have presented in a single volume. To produce a comprehensive resource, this book and a third are being compiled to expand coverage of the field. A summary of papers (2) published on this important subject emphasizes the continuing rapid growth in oxidative stress investigations relating to our understanding of biochemical reactions, their relevance to pathophysiological mechanisms, how disease may arise, and how therapeutic intervention may be achieved(3). Although there is some overlap between the categories, the ana- sis shown below illustrates where current studies are concentrated and are almost evenly distributed between free radicals and AOX. Over the last 4 yr, there has been a 55% increase in the number of papers published in the area.

Download or read book Singlet Molecular Oxygen written by Arthur P. Schaap and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lipid Peroxidation written by Angel Catalá and published by Nova Science Publishers. This book was released on 2017 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an overview of lipid peroxidation: inhibition, effects and mechanisms. The topics analyzed, cover a broad spectrum of functions played by lipid peroxidation and presents new information in this area of research. The topics analyzed include: progress in the knowledge of lipid peroxidation, from the first evidences issued by Nicolas Theodore de Saussure in Paris 1804; fighting against lipid peroxidation: the unique story of docosahexaenoic acid in the brain; protective effects of melatonin and structurally-related molecules in reducing membrane rigidity due to lipid peroxidation; synergistic effects of antioxidant compositions during inhibited lipid autoxidation; lipid peroxidation and animal longevity; free radicals in health and disease; lipid peroxidation in autoimmune diseases; aldehydes derived from lipid peroxidation in cancer and autoimmunity; the role of reactive oxygen species and lipid peroxidation in the neurodegenerative process after spinal cord injury; kinetics and mechanisms of inhibited lipid autoxidation in presence of 4-substituted-coumarins; hypoxia and oxidative stress: cell signaling mechanisms and protective role of vitamin C and cilnidipine; characterization of oxidative stress and antioxidant potency; paying attention to time and location; lipid peroxidation in aquatic organisms: ontogenetic, phylogenetic and ecological aspects; chemistry of lipid oxidation in edible oils; and menopause progression and oxidative stress: associated mechanisms and the importance of physical exercise.

Download or read book Omega 3 Fatty Acids written by Mahabaleshwar V. Hegde and published by Humana Press. This book was released on 2016-09-15 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume argues for the importance of essential nutrients in our diet. Over the last two decades there has been an explosion of research on the relationship of Omega-3 fatty acids and the importance of antioxidants to human health. Expert authors discuss the importance of a diet rich in Omega-3 Fatty acids for successful human growth and development and for the prevention of disease. Chapters highlight their contribution to the prevention and amelioration of a wide range of conditions such as heart disease, diabetes, arthritis, cancer, obesity, mental health and bone health. An indispensable text designed for nutritionists, dietitians, clinicians and health related professionals, Omega-3 Fatty Acids: Keys to Nutritional Health presents a comprehensive assessment of the current knowledge about the nutritional effects of Omega-3 fatty acids and their delivery in foods.

Download or read book Impact of Lipid Peroxidation on the Physiology and Pathophysiology of Cell Membranes written by Angel Catalá and published by Frontiers Media SA. This book was released on 2017-01-17 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The general process of lipid peroxidation consists of three stages: initiation, propagation, and termination. The initiation phase of lipid peroxidation includes hydrogen atom abstraction. Several species can abstract the first hydrogen atom and include the radicals: hydroxyl, alkoxyl, peroxyl, and possibly HO* 2. The membrane lipids, mainly phospholipids, containing polyunsaturated fatty acids are predominantly susceptible to peroxidation because abstraction from a methylene group of a hydrogen atom, which contains only one electron, leaves at the back an unpaired electron on the carbon. The initial reaction of *OH with polyunsaturated fatty acids produces a lipid radical (L*), which in turn reacts with molecular oxygen to form a lipid hydroperoxide (LOOH). Further, the LOOH formed can suffer reductive cleavage by reduced metals, such as Fe++, producing lipid alkoxyl radical (LO*). Peroxidation of lipids can disturb the assembly of the membrane, causing changes in fluidity and permeability, alterations of ion transport and inhibition of metabolic processes. In addition, LOOH can break down, frequently in the presence of reduced metals or ascorbate, to reactive aldehyde products, including malondialdehyde (MDA), 4-hydroxy-2-nonenal (HNE), 4-hydroxy-2-hexenal (4-HHE) and acrolein. Lipid peroxidation is one of the major outcomes of free radical-mediated injury to tissue mainly because it can greatly alter the physicochemical properties of membrane lipid bilayers, resulting in severe cellular dysfunction. In addition, a variety of lipid by-products are produced as a consequence of lipid peroxidation, some of which can exert beneficial biological effects under normal physiological conditions. Intensive research performed over the last decades have also revealed that by-products of lipid peroxidation are also involved in cellular signalling and transduction pathways under physiological conditions, and regulate a variety of cellular functions, including normal aging. In the present collection of articles, both aspects (adverse and benefitial) of lipid peroxidation are illustrated in different biological paradigms. We expect this eBook may encourage readers to expand the current knowledge on the complexity of physiological and pathophysiological roles of lipid peroxidation.

Download or read book Free Radicals Oxidative Stress and Antioxidants written by Tomris Özben and published by Springer Science & Business Media. This book was released on 1998-04-30 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been an explosion of research related to free radicals and antioxidants in recent years, and hundreds of laboratories worldwide are actively involved in many as pects of free radicals, oxidative stress, and antioxidants. The literature on these topics in creases exponentially every year. Over the last few years, we have been fortunate to witness a widespread recognition of the important role of free radicals in a wide variety of pathological conditions including diseases such as atherosclerosis, cardiovascular and neurological diseases, ischemia, emphysema, diabetes, radiation injury, cancer, etc. In ad dition, many laboratories are studying the role of free radicals in the inexorable process of aging. Increased evidence involves free radicals with the etiology of various diseases, thereby suggesting the use of antioxidants as a viable therapeutic approach for the treat ment of free radical mediated pathologies. Despite these impressive developments, many important aspects of free radical and antioxidant research are open for investigation. It is important to understand the overall mechanisms involved in free radical mediated physiological and pathological conditions. This knowledge will undoubtedly lead to the development of new therapeutic approaches to prevent or control free radical related diseases. This book contains the proceedings of the NATO Advanced Study Institute (ASI) on "Free Radicals, Oxidative Stress, and Antioxidants: Pathological and Physiological Sig nificance," which was held in Antalya, Turkey from May 24-June 4, 1997.

Download or read book Free Radicals in Human Health and Disease written by Vibha Rani and published by Springer. This book was released on 2014-11-14 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: The role of oxidative stress in human disease has become an area of intense interest. Free radicals, a normal product of metabolism, exist in all aerobic cells in balance with biochemical antioxidants. Environmental stress increases the levels of free radicals drastically, thereby disturbing the equilibrium between free radical production and the antioxidant capability causing oxidative stress. Over the years, ROS has been implicated in the pathologies of various diseases like cancer, neurological disorder, cardiovascular diseases rheumatoid arthritis, diabetes etc. This book provides an in depth critical state-of-art reviews from established investigators on free radicals, ROS associated pathogenesis of human diseases, biomarkers of oxidative damage, antioxidants, phytonutrients and other related health concerns of modern society. The present book is aimed at graduate students, researchers in academia, industry and clinicians with the interest in redox biology. Special attention has been devoted to the topic of ROS signalling, oxidative stress induced human pathologies & antioxidative therapies. The book consists of four parts in specified topics based on the current literatures for the better understanding of the readers with respect to their subject-wise interests. The first section of the book provides an overview about the ROS production and their measuring tools and techniques followed by the mechanisms involved in the oxidative stress in the second section. The third section describes the involvement of oxidative stress in different human diseases and the last section focuses on the different strategies to ameliorate oxidative stress induced stress.

Download or read book Phospholipids Handbook written by Gregor Cevc and published by CRC Press. This book was released on 1993-08-02 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Employing a multidisciplinary approach to phospholipid research, this work catalogues the current knowledge of this class of molecules and details the general, chemical, physical and structural properties of phospholipid monolayers and bilayers. Phospholipid applications are also covered.

Download or read book Plant derived Bioactives written by Mallappa Kumara Swamy and published by Springer Nature. This book was released on 2020-05-11 with total page 619 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plants produce a vast number of bioactive compounds with different chemical scaffolds, which modulate a diverse range of molecular targets and are used as drugs for treating numerous diseases. Most present-day medicines are derived either from plant compounds or their derivatives, and plant compounds continue to offer limitless reserves for the discovery of new medicines. While different classes of plant compounds, like phenolics, flavonoids, saponins and alkaloids, and their potential pharmacological applications are currently being explored, their curative mechanisms are yet to be understood in detail. This book is divided into 2 volumes and offers detailed information on plant-derived bioactive compounds, including recent research findings. Volume 1, Plant-derived Bioactives: Chemistry and Mode of Action, discusses the chemistry of highly valued plant bioactive compounds and their mode of actions at the molecular level. Volume 2, Plant-derived Bioactives: Production, Properties and Therapeutic Applications, explores the sources, biosynthesis, production, biological properties and therapeutic applications of plant bioactives. Given their scope, these books are valuable resources for members of the scientific community wishing to further explore various medicinal plants and the therapeutic applications of their bioactive compounds. They appeal to scholars, teachers and scientists involved in plant product research, and facilitate the development of innovative new drugs.