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MS and iron

Sigismond Lasocki, Hervé Puy, Grégoire Mercier, Sylvain Lehmann
BACKGROUND: Iron deficiency (ID) is frequent but difficult to diagnose in critically ill patients. ID may be responsible for prolonged post-ICU hospital stays, since it results in fatigue, muscle weakness and anaemia. Hepcidin, the key iron metabolism hormone, may be a good marker of ID in these patients. The aim of this study is to determine whether using mass spectrometry hepcidin determination to diagnose (and treat) ID after prolonged ICU stays may reduce patients' subsequent hospital stays and costs in comparison with conventional (ferritin) methods...
September 14, 2017: Anaesthesia, Critical Care & Pain Medicine
Luanne R DeChristopher
Inconsistent research results have impeded our understanding of the degree to which dietary advanced glycation end products (dAGEs) contribute to chronic disease. Early research suggested that Western-style fast foods, including grilled and broiled meats and French fries, contain high levels of proinflammatory advanced glycation end products (AGEs). However, recent studies with state-of-the-art ultraperformance LC-tandem mass spectrometry (UPLC-MS) found that there is no evidence that these foods have elevated levels of dAGEs relative to other foods...
September 2017: Advances in Nutrition
Arūnas Jagminas, Agnė Mikalauskaitė, Vitalijus Karabanovas, Jūrate Vaičiūnienė
Biocompatible superparamagnetic iron oxide nanoparticles (NPs) through smart chemical functionalization of their surface with fluorescent species, therapeutic proteins, antibiotics, and aptamers offer remarkable potential for diagnosis and therapy of disease sites at their initial stage of growth. Such NPs can be obtained by the creation of proper linkers between magnetic NP and fluorescent or drug probes. One of these linkers is gold, because it is chemically stable, nontoxic and capable to link various biomolecules...
2017: Beilstein Journal of Nanotechnology
Mohamed El Ayed, Safwen Kadri, Selima Smine, Salem Elkahoui, Ferid Limam, Ezzedine Aouani
BACKGROUND: Obesity is a public health problem characterized by increased fat accumulation in different tissues. Obesity is directly linked to breathing problems and medical complications with lung, including obstructive sleep apnea syndrome, obesity hypoventilation syndrome, chronic obstructive pulmonary disease, asthma….In the present work, we aimed to investigate the effect of high fat diet (HFD) on lung lipotoxicity, oxidative stress, fatty acid composition and proportions in lung and implication in asthma development...
September 13, 2017: Lipids in Health and Disease
A K Hagan, A Tripathi, D Berger, D H Sherman, P C Hanna
Bacillus anthracis-a Gram-positive, spore-forming bacterium-causes anthrax, a highly lethal disease with high bacteremia titers. Such rapid growth requires ample access to nutrients, including iron. However, access to this critical metal is heavily restricted in mammals, which requires B. anthracis to employ petrobactin, an iron-scavenging small molecule known as a siderophore. Petrobactin biosynthesis is mediated by asb gene products, and import of the iron-bound (holo)-siderophore into the bacterium has been well studied...
September 12, 2017: MBio
Maja Lazarus, Ankica Sekovanić, Tatjana Orct, Slaven Reljić, Josip Kusak, Jasna Jurasović, Đuro Huber
Tissue element investigations of apex terrestrial mammals are very scarce in Europe. We quantified 16 essential and nonessential elements in the kidney cortex, liver, and muscle tissue of 467 brown bears (Ursus arctos), 125 gray wolves (Canis lupus), one Eurasian lynx (Lynx lynx), and three golden jackals (Canis aureus) from Croatia by inductively coupled plasma mass spectrometry (ICP-MS). Renal cadmium (0.6% of animals) and lead (1%) and hepatic lead (5%) were found in toxicologically relevant levels for mammals only in bears, while the other elements were within normal range...
September 6, 2017: Environmental Science and Pollution Research International
Wei-Ming Chai, Mei-Zhen Lin, Ying-Xia Wang, Kai-Li Xu, Wen-Yang Huang, Dan-Dan Pan, Zheng-Rong Zou, Yi-Yuan Peng
In this study, the structure of proanthocyanidins purified from cherimoya (Annona squamosa) pericarp was analyzed by ESI-QTOF-MS and HPLC analyses. The result indicated that these compounds were procyanidin-type proanthocyanidins, consisting mainly of (epi)catechin units linked b y B-type interflavan bonds. The analyses of enzymology showed that the activities of monophenolase and diphenolase of tyrosinase could be powerfully inhibited by the proanthocyanidins. Further researches on the inhibition mechanism demonstrated that they were reversible and competitive inhibitors with the KI value of 27...
October 2017: Food Research International
Anders Lund, Lee Slater, Estella Atekwana, Dimitrios Ntarlagiannis, Isabelle M Cozzarelli, Barbara Bekins
Conventional characterization and monitoring of hydrocarbon (HC) pollution is often expensive and time consuming. Magnetic susceptibility (MS) has been proposed as an inexpensive, longterm monitoring proxy of the degradation of HC. We acquired repeated down hole MS logging data in boreholes at a HC contaminated field research site in Bemidji, MN, USA. The MS data were analyzed in conjunction with redox conditions and iron availability within the source zone in order to better assess whether MS can serve as a proxy for monitoring HC contamination in unconsolidated sediments...
September 5, 2017: Environmental Science & Technology
Mijin Kim, Juhee Kim, Minhee Kim, Yong-Seong Kim, Seung Mo Nam, Deok Hyun Moon, Seunghun Hyun
Chemical stability of As(V) in amended mine-impacted soils was assessed according to functions of incubation period (0, 1, 2, 4, and 6 months), amendment dose (2.5 and 5%), and application timing (0 and 3rd month). Six soils contaminated with 26-209 mg kg(-1) of As(V) were collected from two abandoned mine sites and were treated with two alkaline iron-rich materials (mine discharge sludge (MS) and steel-making slag (SS)). Seventeen to 23% of As(V) in soils was labile. After each designated time, As(V) stability was assessed by the labile fractions determined with sequential extraction procedures (F1-F5)...
September 4, 2017: Environmental Science and Pollution Research International
Ankur Sood, Varun Arora, Jyoti Shah, R K Kotnala, Tapan K Jain
In this paper we report synthesis of aqueous based gold coated iron oxide nanoparticles to integrate the localized surface plasma resonance (SPR) properties of gold and magnetic properties of iron oxide in a single system. Iron oxide-gold core shell nanoparticles were stabilized by attachment of thiolated sodium alginate to the surface of nanoparticles. Transmission electron microscope (TEM) micrograph presents an average elementary particle size of 8.1±2.1nm. High resolution TEM (HR-TEM) and X-ray photon spectroscopy further confirms the presence of gold shell around iron oxide core...
November 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Ali Fakhri, Shiva Tahami, Pedram Afshar Nejad
The Best performance drug delivery systems designed with Fe3O4-Ag2O quantum dots decorated cellulose nanofibers which that grafted with Etoposide and Methotrexate. Morphology properties were characterized by Scanning and Transmittance electron microscopy. The crystalline structure of prepared sample was evaluated using by X-ray diffraction. The vibrating sample magnetometer analysis was used for magnetic behavior of samples. The size distributions of Fe3O4-Ag2O QDs/Cellulose fibers nanocomposites indicate that the average diameter was 62...
August 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
Chundan Zhang, Zhonghua Wang, Dijun Zhang, Jun Zhou, Chenyang Lu, Xiurong Su, Dewen Ding
Vibrio bacteria live in both marine and freshwater habitats and are associated with aquatic animals. Vibrio vulnificus is a pathogenic bacterium that infects people and livestock. It is usually found in offshore waters or within fish and shellfish. This study presents a comparative proteomic analysis of the outer membrane protein (OMP) changes in V. vulnificus proteins after stimulation with sewage from sewage drains. Using two-dimensional electrophoresis followed by MALDI-TOF MS/MS, 32 protein spots with significant differences in abundance were identified and characterized...
September 1, 2017: Environmental Science and Pollution Research International
Vladimir V Bamm, Mary E L Henein, Shannon L J Sproul, Danielle K Lanthier, George Harauz
There is a well-documented relationship between cerebral vasculature and multiple sclerosis (MS) lesions: abnormal accumulations of iron have been found in the walls of the dilated veins in cerebral MS plaques. The source of this iron is unknown, but could be related to the recognized phenomenon of capillary and venous hemorrhages leading to blood extravasation. In turn, hemorrhaging leading to hemolysis results in extracellular release of hemoglobin, a reactive molecule that could induce local oxidative stress, inflammation, and tissue damage...
August 31, 2017: Free Radical Biology & Medicine
Hanako Fukano, Shinpei Wada, Osamu Kurata, Kinya Katayama, Nagatoshi Fujiwara, Yoshihiko Hoshino
A previously undescribed rapidly growing, non-pigmented mycobacterium was identified based on biochemical and nucleic acid analyses, as well as growth characteristics. Seven isolates were cultured from samples collected from five thread-sail filefish (Stephanolepis cirrhifer) and two farmed black scraper (Thamnaconus modestus). Bacterial growth occurred at 15-35 °C on Middlebrook 7H11 agar. The bacteria were positive for catalase activity at 68 °C and urease activity, intermediate for iron uptake, and negative for Tween 80 hydrolysis, nitrate reduction, semi-quantitative catalase activity and arylsulfatase activity at day 3...
August 2017: International Journal of Systematic and Evolutionary Microbiology
Simon Faissner, Yasamin Mahjoub, Manoj Mishra, Steffen Haupeltshofer, Jennifer Nancy Hahn, Ralf Gold, Marcus Koch, Luanne M Metz, Tamir Ben-Hur, V Wee Yong
BACKGROUND: Most multiple sclerosis (MS) patients succumb to a progressive phenotype. Continued lymphocyte activity in the brain, microglia-mediated injury, iron deposition, and oxidative stress are characteristics of progressive MS. OBJECTIVE: As minocycline and hydroxychloroquine have been shown to inhibit microglia, we evaluated their effects on other outcomes relevant for progression. METHODS: Medications were evaluated in culture and in mice with acute and chronic experimental autoimmune encephalomyelitis (EAE)...
August 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
Alessandra Sussulini, Helena Munhoz Erbolato, Gustavo de Souza Pessôa, Marco Aurélio Zezzi Arruda, Johann Steiner, Daniel Martins-de-Souza
Antipsychotics are the main line of treatment for schizophrenia, a disorder that affects about 1% of the worldwide population. Considering the poor performance of antipsychotics on patients, this work aimed at detecting alterations in the elemental profile resulting from the use of this type of medication using an elemental fingerprinting strategy. We evaluated 56 plasma samples from schizophrenia patients by inductively coupled plasma mass spectrometry (ICP-MS) before (t0) and after 6 weeks (t6) of treatment...
August 29, 2017: European Archives of Psychiatry and Clinical Neuroscience
Liuxing Feng, Jun Wang, Hongmei Li, Xinzheng Luo, Jiao Li
Isotope Dilution Laser Ablation ICP-MS (ID-LA-ICP-MS), because of its impressive spatial resolution capacity and precise means for quantification, is one of the most promising tools for in-situ quantitative imaging of trace elements in biological samples. In the ID-LA-ICP-MS strategy for tissue section, the tissue must be maintained intact during the whole sample preparation process. Therefore, how to homogeneously distribute enriched isotope spike on tissue section and how to confirm isotope equilibration between sample and spike are two important challenges...
September 1, 2017: Analytica Chimica Acta
Makoto Kihara, Yukari Matsuo-Tezuka, Mariko Noguchi-Sasaki, Keigo Yorozu, Mitsue Kurasawa, Yasushi Shimonaka, Michinori Hirata
Epoetin beta pegol (continuous erythropoiesis receptor activator; C.E.R.A.), or methoxy-polyethylene glycol-modified epoetin beta, is a long-acting erythropoiesis stimulating agent (ESA) that effectively maintains hemoglobin levels. It promotes proliferation of erythroid progenitor cells in hematopoietic organs and leads to increased reticulocyte and hemoglobin levels. However, the detailed erythropoietic effects of various ESAs on their target organs have yet to be clarified, and new approaches are needed to analyze tissue iron localization with structural information...
August 17, 2017: Journal of the American Society for Mass Spectrometry
Laura D Klein, Alicia A Breakey, Brooke Scelza, Claudia Valeggia, Grazyna Jasienska, Katie Hinde
Human milk contains essential micronutrients for growth and development during early life. Environmental pollutants, such as potentially toxic metals, can also be transferred to the infant through human milk. These elements have been well-studied, but changing diets and environments and advances in laboratory technology require re-examining these elements in a variety of settings. The aim of this study was to characterize the concentrations of essential and toxic metals in human milk from four diverse populations...
2017: PloS One
Yun Lu, Feng Qiao, Yue Li, Xiao-Hong Sang, Cong-Ran Li, Jian-Dong Jiang, Xin-Yi Yang, Xue-Fu You
Ferredoxins are iron-sulfur protein that mediate electron transfer in cytochrome P450 mono-oxygenase (CYP)-related catalytic reactions in a wide variety of organisms. Rv1786 is a putative ferredoxin, encoded by a gene located downstream of the gene encoding CYP143A1 in the Mycobacterium tuberculosis genome. However, the structure and function of Rv1786 have remained unclear. Here, the recombinant Mtb Rv1786 was expressed, purified as a His-tagged form and characterized with [3Fe-4S] clusters as its cofactors using a series of measurements including SDS-PAGE, western blot, UV/Visible, MALDI-TOF/TOF-MS, and electron paramagnetic resonance spectroscopic analysis...
August 15, 2017: Applied Microbiology and Biotechnology
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