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Melatonin in Plants

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889453115 Year: Pages: 297 DOI: 10.3389/978-2-88945-311-5 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Botany
Added to DOAB on : 2018-02-27 16:16:45
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This topic focuses on distribution, synthesis, metabolism, and the in vivo roles of melatonin in plants, with 1 editorial, 3 reviews, 21 original research studies and 1 corrigendum.

Chloroplast

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ISBN: 9783038973362 / 9783038973379 Year: Pages: 474 DOI: 10.3390/books978-3-03897-337-9 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Biology --- Botany
Added to DOAB on : 2019-02-18 09:52:18
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Chloroplasts are at the front line of many advancements in molecular biology, ranging from evolutionary biology to the mechanism of energy transduction, also including stress responses and programmed leaf death. In addition to the relevance of basic knowledge, advances are unveiling promising insights to improve plant productivity, disease resistance, and environmental control. The production of secondary metabolites and proteins by transformed chloroplasts adds further excitement to applied investigations on chloroplasts.The comparison of the sequences of the chloroplast DNA of different plants provides valuable information on gene content, reordering in the circular chloroplast DNA, and mutational genetic-derive, relevant to the evolution of the chloroplast. Increasing facilities for intense genome sequencing have prompted many laboratories to focus on the chloroplast DNA. Reflecting these efforts, more than half of the articles in this book deal with functional or evolutionary investigations based on sequence analyses of chloroplast DNA. Additional topics treated in the issue include post-transcriptional control, the processing of nuclear encoded preproteins of chloroplasts, the response of photosynthetic machinery to water deficit, turn-over of chloroplast proteins, mechanism of chloroplast division, and chloroplast movements.

Impact of Lipid Peroxidation on the Physiology and Pathophysiology of Cell Membranes

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889450824 Year: Pages: 88 DOI: 10.3389/978-2-88945-082-4 Language: English
Publisher: Frontiers Media SA
Subject: Physiology --- Science (General)
Added to DOAB on : 2017-07-06 13:27:36
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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.

Antioxidants and Second Messengers of Free Radicals

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ISBN: 9783038975335 / 9783038975342 Year: Pages: 194 DOI: 10.3390/books978-3-03897-534-2 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Biology --- Medicine (General) --- Chemistry (General)
Added to DOAB on : 2019-01-17 09:35:49
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The history of science can teach modern men that our understanding of life is to a great extent based on the accuracy of the analytical methods that we use and, on our readiness to oppose dogmatic opinions, which are based on outdated methods and black/white approaches to the major questions raised by mankind in the past. The recent decades have brought a lot of new insights into the fundamentals of the active principles of reactive oxygen species that are necessary for living cells, but which also cause dangerous pathophysiological processes. Accordingly, although they were previously considered to be the most undesired toxic compounds generated as the final products of the oxidative degradation of lipids, reactive aldehydes are now considered to play important roles both in health and in major diseases. Represented mostly by 4-hydroxynonenal (HNE), a substance discovered only fifty years ago, reactive aldehydes are the focus of research not only because of their toxicity but also because of their positive effects regulating the most important metabolic processes such as growth of living cells or the death of cells. Better understanding the interactions between reactive aldehydes and natural or synthetic antioxidant substances might eventually help us to better monitor, prevent and control modern diseases, thus building pillars for the development of the modern, multidisciplinary life sciences and integrative medicine of the 21st century.

Silver Nano/microparticles: Modification and Applications

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ISBN: 9783039211777 / 9783039211784 Year: Pages: 206 DOI: 10.3390/books978-3-03921-178-4 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-08-28 11:21:27
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Nano/micro-size particles are widely applied in various fields. Among the various particles, silver particles are considered among the most prominent nanomaterials in the biomedical and industrial sectors because of their favorable physical, chemical, and biological characteristics. Thus, numerous studies have been conducted to evaluate their properties and utilize them in various applications, such as diagnostics, anti-bacterial and anti-cancer therapeutics, and optoelectronics. The properties of silver particles are strongly influenced by their size, morphological shape, and surface characteristics, which can be modified by diverse synthetic methods, reducing agents, and stabilizers. This Special Issue provides a range of original contributions detailing the synthesis, modification, properties, and applications of silver materials. Nine outstanding papers describing examples of the most recent advances in silver nano/microparticles are included. Silver nano/micro-size particles have many potential advantages as next-generation materials in various areas, including nanomedicine. This Special Issue might be helpful to understand the value of silver particles in the biomedical and industrial fields

Protective and Detrimental Role of Heme Oxygenase-1

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ISBN: 9783039218066 / 9783039218073 Year: Pages: 220 DOI: 10.3390/books978-3-03921-807-3 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Medicine (General) --- Therapeutics
Added to DOAB on : 2019-12-09 11:49:16
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The book “Protective and Detrimental Role of Heme Oxygenase-1”, includes a selection of original research papers and reviews aimed at understanding the dual role (protective and detrimental) of HO-1 and the involved signaling pathways. Original research papers and reviews aimed at the identification of natural molecules or new synthetic compounds able to modulate HO-1 activity/expression help make HO-1 a potential therapeutic target for the amelioration of various diseases.

Keywords

ferroptosis --- heme oxygenase-1 --- iron --- reactive oxygen species --- glutathione --- chemotherapy --- paracetamol --- Myristica fragrans kernels --- heme oxygenase 1 --- liver --- glucocorticoid receptor --- GR --- heme oxygenase 1 --- HO-1 --- prostate cancer --- ANTIGEN presenting cell --- tolerance --- Tet-ON system --- antigen presentation --- analgesia --- carbon monoxide --- heme oxygenase 1 --- inflammatory pain --- locus coeruleus --- nitric oxide --- bilirubin --- Gunn rats --- hyperbilirubinemia --- inflammation --- LPS --- NF-?B --- caloric restriction --- Sirtuin 1 --- Heme Oxygenase-1 --- PGC-1? --- cardiomyopathy --- diabetes mellitus --- Type 1 diabetes mellitus (T1D) --- Pancreatic oxidative damage --- Heme oxygenase-1 (HO-1) inducers --- Caffeic acid phenethyl ester (CAPE) --- Reactive oxygen species (ROS) --- Dimethylarginine dimethylaminohydrolase-1 (DDAH-1) --- Inducible nitric oxide synthase (iNOS) --- Gamma-Glutamyl-Cysteine Ligase (GGCL) --- prostate cancer --- heme oxygenase --- metformin --- apoptosis --- ER stress --- HO-1 activity inhibitor --- carbon monoxide --- lung preservation --- ischemia–reperfusion injury --- high-pressure gas --- Colon cancer --- Betula etnensis Raf. --- oxidative stress --- heme oxigenase-1 --- ferroptosis --- thiol groups --- angiotensin II --- mineralocorticoid receptor --- heme oxygenase 1 --- sirtuin 1 --- adipocytes --- oxidative stress --- heme oxygenase-1 --- atherosclerosis --- coronary artery disease --- peripheral artery disease --- carotid plaque --- heme oxygenase --- endoplasmic reticulum stress --- hemoglobin --- heme --- n/a

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