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https://www.readbyqxmd.com/read/27920925/crystal-structure-of-bamnb2o5-containing-structurally-isolated-manganese-oxide-sheets
#1
Elizabeth M Maschmeyer, Liurukara D Sanjeewa, Kulugammana G S Ranmohotti
In an attempt to search for mixed alkaline-earth and transition metal pyroborates, the title compound, barium manganese(II) pyroborate, has been synthesized by employing a flux method. The structure of BaMnB2O5 is composed of MnO5 square pyramids that form Mn2O8 dimers by edge-sharing and of pyroborate units ([B2O5](4-)) that are composed of two corner-sharing trigonal-planar BO3 units. These building blocks share corners to form ∞(2)[MnB2O5](2-) layers extending parallel to (100). The Ba(2+) cations reside in the gap between two manganese pyroborate slabs with a coordination number of nine...
September 1, 2016: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/27918138/association-of-essential-trace-metals-in-maternal-hair-with-the-risk-of-neural-tube-defects-in-offspring
#2
Lailai Yan, Bin Wang, Zhenjiang Li, Yaqiong Liu, Wenhua Huo, Jingyu Wang, Zhiwen Li, Aiguo Ren
BACKGROUND: The relationship between essential trace metals (ETMs) and the risk of neural tube defects (NTDs) is still unclear. One of the challenges is to evaluate the intake of ETMs of women during their early period of pregnancy. We proposed the hypothesis that an ETM deficiency in women during their early period of pregnancy is associated with an elevated risk of NTDs in offspring. METHODS: We recruited 191 women with NTD-affected pregnancies (case group) and 261 women who delivered healthy infants (control group)...
December 5, 2016: Birth Defects Research. Part A, Clinical and Molecular Teratology
https://www.readbyqxmd.com/read/27917122/glucagon-like-peptide-1-analog-liraglutide-delays-onset-of-experimental-autoimmune-encephalitis-in-lewis-rats
#3
Brian DellaValle, Gitte S Brix, Birgitte Brock, Michael Gejl, Anne M Landau, Arne Møller, Jørgen Rungby, Agnete Larsen
Introduction: Recent findings indicate that metabolic disturbances are involved in multiple sclerosis (MS) pathology and influence the susceptibility to treatment, directing attention toward anti-diabetic drugs such as metformin and pioglitazone. Liraglutide, a drug of the glucagon-like peptide-1 (GLP-1) family, is also anti-diabetic and weight-reducing and is, moreover, directly neuroprotective and anti-inflammatory in a broad spectrum of experimental models of brain disease. In this study we investigate the potential for this FDA-approved drug, liraglutide, as a treatment for MS by utilizing the experimental model, experimental autoimmune encephalitis (EAE)...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27916898/a-multi-pumping-flow-system-for-in-situ-measurements-of-dissolved-manganese-in-aquatic-systems
#4
David Meyer, Ralf D Prien, Olaf Dellwig, Joanna J Waniek, Ingo Schuffenhauer, Jan Donath, Siegfried Krüger, Malte Pallentin, Detlef E Schulz-Bull
A METals In Situ analyzer (METIS) has been used to determine dissolved manganese (II) concentrations in the subhalocline waters of the Gotland Deep (central Baltic Sea). High-resolution in situ measurements of total dissolved Mn were obtained in near real-time by spectrophotometry using 1-(2-pyridylazo)-2-naphthol (PAN). PAN is a complexing agent of dissolved Mn and forms a wine-red complex with a maximum absorbance at a wavelength of 562 nm. Results are presented together with ancillary temperature, salinity, and dissolved O 2 data...
November 30, 2016: Sensors
https://www.readbyqxmd.com/read/27916408/safety-tolerability-and-immunogenicity-of-a-4-antigen-staphylococcus-aureus-vaccine-sa4ag-results-from-a-first-in-human-randomised-placebo-controlled-phase-1-2-study
#5
Robert W Frenck, C Buddy Creech, Eric A Sheldon, David J Seiden, Martin K Kankam, James Baber, Edward Zito, Robin Hubler, Joseph Eiden, Joseph M Severs, Shite Sebastian, Jasdeep Nanra, Kathrin U Jansen, William C Gruber, Annaliesa S Anderson, Douglas Girgenti
BACKGROUND: A prophylactic Staphylococcus aureus four-antigen vaccine (SA4Ag) is under development for prevention of invasive S. aureus disease. A preliminary S. aureus three-antigen vaccine (SA3Ag) was reformulated to include a novel manganese transporter protein (MntC or rP305A). This study describes the first-in-human dose-finding, safety, and immunogenicity results for SA4Ag. METHODS: In this double-blind, sponsor-unblind, placebo-controlled, phase 1/2 study, 454 healthy adults aged 18-64years were randomised to receive a single dose of one of three formulations of SA4Ag with escalating dose levels of rP305A or placebo...
December 1, 2016: Vaccine
https://www.readbyqxmd.com/read/27916329/detection-of-manganese-peroxidase-and-other-exoenzymes-in-four-isolates-of-geastrum-geastrales-in-pure-culture
#6
Francisco Kuhar, Valeria C Castiglia, Juan C Zamora
Knowledge regarding the enzymatic machinery of fungi is decisive to understand their ecological role. The species of the genus Geastrum are known to grow extremely slowly in pure culture, which makes it difficult to evaluate physiological parameters such as enzyme activity. Qualitative assays were performed on isolates of four species of this genus, showing evidence of laccase, cellulase, pectinase, amylase and lipase activity and suggesting that a wide range of carbon sources can be exploited by these species...
December 1, 2016: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/27913844/global-dna-methylation-profiling-of-manganese-exposed-human-neuroblastoma-sh-sy5y-cells-reveals-epigenetic-alterations-in-parkinson-s-disease-associated-genes
#7
Prashant Tarale, Saravanadevi Sivanesan, Atul P Daiwile, Reinhard Stöger, Amit Bafana, Pravin K Naoghare, Devendra Parmar, Tapan Chakrabarti, Krishnamurthi Kannan
Manganese (Mn) is an essential trace element required for optimal functioning of cellular biochemical pathways in the central nervous system. Elevated exposure to Mn through environmental and occupational exposure can cause neurotoxic effects resulting in manganism, a condition with clinical symptoms identical to idiopathic Parkinson's disease. Epigenetics is now recognized as a biological mechanism involved in the etiology of various diseases. Here, we investigated the role of DNA methylation alterations induced by chronic Mn (100 µM) exposure in human neuroblastoma (SH-SY5Y) cells in relevance to Parkinson's disease...
December 2, 2016: Archives of Toxicology
https://www.readbyqxmd.com/read/27912164/manganese-ii-chloride-alters-behavioral-and-neurochemical-parameters-in-larvae-and-adult-zebrafish
#8
Stefani Altenhofen, Melissa Talita Wiprich, Laura Roesler Nery, Carlos Eduardo Leite, Monica Ryff Moreira Roca Vianna, Carla Denise Bonan
Manganese (Mn) is an essential metal for organisms, but high levels can cause serious neurological damage. The aim of this study was to evaluate the effects of MnCl2 exposure on cognition and exploratory behavior in adult and larval zebrafish and correlate these findings with brain accumulation of Mn, overall brain tyrosine hydroxylase (TH) levels, dopamine (DA) levels, 3,4-dihydroxyphenylacetic acid (DOPAC) levels and cell death markers in the nervous system. Adults exposed to MnCl2 for 4days (0.5, 1.0 and 1...
November 17, 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27912121/delta-manganese-dioxide-nanosheets-decorated-magnesium-wire-for-the-degradation-of-methyl-orange
#9
Yan Zhang, Tian Xu Zheng, Yao Bo Hu, Xiao Luo Guo, Hui Hua Peng, Yu Xin Zhang, Li Feng, Huai Li Zheng
MnO2-decorated magnesium wire composite (MnO2-M) was fabricated via a simple hydrothermal reaction and accompanied by the calcination process (MnO2/Mn3O4-M). To clarify the optimized reaction condition of δ-MnO2 in the system, the effect of different pH, temperature and pollutant concentration of methyl orange (MO) for degradation process were investigated. Experimental results showed that MnO2-M achieves a high removal rate of 76% (2h, at 25°C) in the presence of H2O2 at pH 2.5, which is higher than that of MnO2/Mn3O4-M (54%)...
November 24, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27911886/high-temperature-magnetism-and-microstructure-of-ferromagnetic-alloy-si1-x-mn-x
#10
B A Aronzon, A B Davydov, A L Vasiliev, N S Perov, O A Novodvorsky, L S Parshina, M Yu Presniakov, E Lahderanta
The results of a detailed study of magnetic properties and of the microstructure of SiMn films with a small deviation from stoichiometry are presented. The aim was to reveal the origin of the high temperature ferromagnetic ordering in such compounds. Unlike SiMn single crystals with the Curie temperature ~30 K, considered Si1-x Mn x compounds with x  =  0.5  +Δx and Δx in the range of 0.01-0.02 demonstrate a ferromagnetic state above room temperature. Such a ferromagnetic state can be explained by the existence of highly defective B20 SiMn nanocrystallites...
December 2, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/27911881/low-energy-ne-ion-beam-induced-modifications-of-magnetic-properties-in-mnas-thin-films
#11
M Trassinelli, L Bernard Carlsson, S Cervera, M Eddrief, V H Etgens, E V Gafton, E Lacaze, E Lamour, A Lévy, S Macé, C Prigent, J-P Rozet, S Steydli, M Marangolo, D Vernhet
Investigations of the complex behavior of the magnetization of manganese arsenide thin films due to defects induced by irradiation of slow heavy ions are presented. In addition to the thermal hysteresis suppression already highlighted in Trassinelli et al (2014 Appl. Phys. Lett. 104 081906), we report here on new local magnetic features recorded by a magnetic force microscope at different temperatures close to the characteristic sample phase transition. Complementary measurements of the global magnetization in different conditions (applied magnetic field and temperatures) enable the film characterization to be completed...
December 2, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/27910774/comparison-of-the-chemical-composition-and-bioactive-components-of-fruiting-bodies-and-submerged-cultured-mycelia-of-the-willow-bracket-medicinal-mushroom-phellinus-igniarius-agaricomycetes
#12
Huawei Zeng, Wenfeng Wang, Menghua Ma, Guohua Xu, Mei Ying-Jie, Jianfan Sund
Chemical compositions and bioactive ingredients of dried fruiting bodies from Phellinus igniarius (CGMCC no. 50095) (P1) and submerged culture of Ph. igniarius dried mycelia (P2) were investigated in this study. It was found that glutamic acid was regarded as a major amino acid in P1 (1.20%) and was approximately 2.55-fold higher than that in P2 (0.47%). Total amino acids in P1 (5.36%) were slightly higher than in P2 (4.09%). The amounts of iron, zinc, copper, and manganese in P1 were 1.96-3.42 times as high as those in P2, whereas potassium, sodium, and magnesium in P2 were almost 2...
2016: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/27910197/a-stable-manganese-pincer-catalyst-for-the-selective-dehydrogenation-of-methanol
#13
María Andérez-Fernández, Lydia K Vogt, Steffen Fischer, Wei Zhou, Haijun Jiao, Marcel Garbe, Saravanakumar Elangovan, Kathrin Junge, Henrik Junge, Ralf Ludwig, Matthias Beller
For the first time, structurally defined manganese pincer complexes catalyze the dehydrogenation of aqueous methanol to hydrogen and carbon dioxide, which is a transformation of interest with regard to the implementation of a hydrogen and methanol economy. Excellent long-term stability was demonstrated for the Mn-PNPiPr catalyst, as a turnover of more than 20 000 was reached. In addition to methanol, other important hydrogen carriers were also successfully dehydrogenated.
December 2, 2016: Angewandte Chemie
https://www.readbyqxmd.com/read/27908423/copper-brain-protein-protection-against-free-radical-induced-neuronal-death-survival-ratio-in-sh-sy5y-neuroblastoma-cell-cultures
#14
Roger Deloncle, Bernard Fauconneau, Olivier Guillard, José Delaval, Gérard Lesage, Alain Pineau
In Creutzfeldt Jakob, Alzheimer and Parkinson diseases, copper metalloproteins such as prion, amyloid protein precursor and α-synuclein are able to protect against free radicals by reduction from cupric Cu(+2) to cupreous Cu(+). In these pathologies, a regional copper (Cu) brain decrease correlated with an iron, zinc or manganese (Mn) increase has previously been observed, leading to local neuronal death and abnormal deposition of these metalloproteins in β-sheet structures. In this study we demonstrate the protective effect of Cu metalloproteins against deleterious free-radical effects...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908416/suppression-of-the-brain-pituitary-testicular-axis-function-following-acute-arsenic-and-manganese-co-exposure-and-withdrawal-in-rats
#15
Isaac A Adedara, Amos O Abolaji, Ifeoluwa O Awogbindin, Ebenezer O Farombi
Despite the fact that most environmental exposures to metals do not occur in isolation, the combined effects of metal mixtures on brain-pituitary-gonadal axis are poorly known. The present study investigated the impacts of co-exposure to arsenic (As) and manganese (Mn) on sperm characteristics, reproductive hormones and selected oxidative stress indices in the brain, testes and epididymis of rats following exposure for 15 consecutive days to 60mg/L of AsO2Na and 30mg/L of MnCl2 in drinking water. The results showed that while the brain weight remained unaffected, the fluid intake and the weights of testes and epididymis significantly (p<0...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908408/protective-effect-of-magnesium-acetyltaurate-against-nmda-induced-retinal-damage-involves-restoration-of-minerals-and-trace-elements-homeostasis
#16
Azliana Jusnida Ahmad Jafri, Natasha Najwa Nor Arfuzir, Lidawani Lambuk, Igor Iezhitsa, Renu Agarwal, Puneet Agarwal, Norhafiza Razali, Anna Krasilnikova, Maria Kharitonova, Vasily Demidov, Evgeny Serebryansky, Anatoly Skalny, Alexander Spasov, Ahmad Pauzi Md Yusof, Nafeeza Mohd Ismail
Glutamate-mediated excitotoxicity involving N-methyl-d-aspartate (NMDA) receptors has been recognized as a final common outcome in pathological conditions involving death of retinal ganglion cells (RGCs). Overstimulation of NMDA receptors results in influx of calcium (Ca) and sodium (Na) ions and efflux of potassium (K). NMDA receptors are blocked by magnesium (Mg). Such changes due to NMDA overstimulation are also associated with not only the altered levels of minerals but also that of trace elements and redox status...
January 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/27908283/expression-of-a-fungal-manganese-peroxidase-in-escherichia-coli-a-comparison-between-the-soluble-and-refolded-enzymes
#17
Nan Wang, Kai Ren, Rong Jia, Wenting Chen, Ruirui Sun
BACKGROUND: Manganese peroxidase (MnP) from Irpex lacteus F17 has been shown to have a strong ability to degrade recalcitrant aromatic pollutants. In this study, a recombinant MnP from I. lacteus F17 was expressed in Escherichia coli Rosetta (DE3) in the form of inclusion bodies, which were refolded to achieve an active enzyme. Further, we optimized the in vitro refolding conditions to increase the recovery yield of the recombinant protein production. Additionally, we attempted to express recombinant MnP in soluble form in E...
December 1, 2016: BMC Biotechnology
https://www.readbyqxmd.com/read/27907863/dimerization-redox-properties-and-antioxidant-activity-of-two-manganese-iii-complexes-of-difluoro-and-dichloro-substituted-schiff-base-ligands
#18
Claudia Palopoli, Guillermo Gómez, Ana Foi, Fabio Doctorovich, Sonia Mallet-Ladeira, Christelle Hureau, Sandra Signorella
Two mononuclear Mn(III) complexes [Mn(3,5-F2salpn)(H2O)2][B(C6H5)4]·2H2O (1·2H2O) and [Mn(3,5-Cl2salpn)(OAc)(H2O)]·H2O (2·H2O), where H2salpn=1,3-bis(salicylidenamino)propane, have been prepared and characterized. The crystal structure of 1·H2O shows that this complex forms μ-aqua dimers with a short Mn⋯Mn distance of 4.93Å. Under anaerobic conditions, the two complexes are stable in solution and possess trans-diaxial symmetry with the tetradentate Schiff base ligand symmetrically arranged in the equatorial plane...
November 18, 2016: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/27907125/identification-of-a-highly-conserved-hypothetical-protein-ton_0340-as-a-probable-manganese-dependent-phosphatase
#19
Young-Sik Sohn, Seong-Gyu Lee, Kwang-Hoon Lee, Bonsu Ku, Ho-Chul Shin, Sun-Shin Cha, Yeon-Gil Kim, Hyun Sook Lee, Sung-Gyun Kang, Byung-Ha Oh
A hypothetical protein TON_0340 of a Thermococcus species is a protein conserved in a variety of organisms including human. Herein, we present four different crystal structures of TON_0340, leading to the identification of an active-site cavity harboring a metal-binding site composed of six invariant aspartate and glutamate residues that coordinate one to three metal ions. Biochemical and mutational analyses involving many phosphorous compounds show that TON_0340 is a Mn2+-dependent phosphatase. Mg2+ binds to TON_0340 less tightly and activates the phosphatase activity less efficiently than Mn2+...
2016: PloS One
https://www.readbyqxmd.com/read/27905283/comparative-analysis-of-serum-mineral-levels-and-parasite-load-in-goats-naturally-infected-with-gastrointestinal-nematodes
#20
Serap Ünübol Aypak, Süleyman Aypak, Hüseyin Voyvoda, Gülşen Güven, Evrim Dereli Fidan, Gamze Tosun, Mehmet Gültekin, Emrah Şimşek, Asude Gülçe Güler
OBJECTIVE: This study aimed to investigate the relationship between serum mineral levels and parasite load in Saanen (n=37) and Damascus (n=13) goats, which were all approximately 2 months pregnant and naturally infected with gastrointestinal nematodes. METHODS: To determine parasite concentration individually, fecal samples were taken from each goat, and the eggs per gram (EPG) of feces was detected via a modified McMaster technique. To investigate the possible effects of parasite concentration on serum mineral levels, blood was drawn from the goats and serum calcium, phosphorus, magnesium, iron, copper, zinc, manganese, nickel, and cadmium levels were measured via the ICP-OES technique...
September 2016: Türkiye Parazitolojii Dergisi
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