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https://www.readbyqxmd.com/read/28102294/novel-bio-functional-magnesium-coating-on-porous-ti6al4v-orthopaedic-implants-in-vitro-and-in-vivo-study
#1
Xiaokang Li, Peng Gao, Peng Wan, Yifeng Pei, Lei Shi, Bo Fan, Chao Shen, Xin Xiao, Ke Yang, Zheng Guo
Titanium and its alloys with various porous structures are one of the most important metals used in orthopaedic implants due to favourable properties as replacement for hard tissues. However, surface modification is critical to improve the osteointegration of titanium and its alloys. In this study, a bioactive magnesium coating was successfully fabricated on porous Ti6Al4V by means of arc ion plating, which was proved with fine grain size and high film/substrate adhesion. The surface composition and morphology were characterized by X-ray diffraction and SEM equipped with energy dispersive spectroscopy...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102089/disulfiram-moderately-restores-impaired-hepatic-redox-status-of-rats-subchronically-exposed-to-cadmium
#2
Aida Begic, Ana Djuric, Milica Ninkovic, Ivana Stevanovic, Dragan Djurdjevic, Milos Pavlovic, Katarina Jelic, Ana Pantelic, Goran Zebic, Bratislav Dejanovic, Ivan Stanojevic, Danilo Vojvodic, Petar Milosavljevic, Mirjana Djukic, Luciano Saso
Examination of cadmium (Cd) toxicity and disulfiram (DSF) effect on liver was focused on oxidative stress (OS), bioelements status, morphological and functional changes. Male Wistar rats were intraperitoneally treated with 1 mg CdCl2/kg BW/day; orally with 178.5 mg DSF/kg BW/day for 1, 3, 10 and 21 days; and co-exposed from 22nd to 42nd day. The co-exposure nearly restored previously suppressed total superoxide dismutase (SOD), catalase (CAT) and increased glutathione peroxidase (GPx) activities; increased previously reduced glutathione reductase (GR) and total glutathione-S-transferase (GST) activities; reduced previously increased superoxide anion radical (O2(·-)) and malondialdehyde (MDA) levels; increased zinc (Zn) and iron (Fe), and decreased copper (Cu) (yet above control value), while magnesium (Mg) was not affected; and decreased serum alanine aminotransferases (ALT) levels...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28101539/regioselective-magnesiation-of-n-heterocyclic-molecules-securing-insecure-cyclic-anions-by-a-%C3%AE-diketiminate-magnesium-clamp
#3
Laia Davin, Ross McLellan, Alberto Hernán-Gómez, William Clegg, Alan R Kennedy, Maria Mertens, Iain A Stepek, Eva Hevia
Using a specially designed magnesium metallating manifold, combining kinetically activated TMP amide base with a sterically amplified β-diketiminate ligand, this study has established a new regioselective strategy for magnesiation of challenging N-heterocyclic molecules. The broad scope of the approach is illustrated through reactions of pyrazine, triazoles and substituted pyridines by isolation and structural elucidation of their magnesiated intermediates.
January 19, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28100427/the-possible-role-of-propofol-in-drug-induced-torsades-de-pointes-a-real-world-single-center-analysis
#4
Victor A Abrich, Harish Ramakrishna, Arjun Mehta, Farouk Mookadam, Komandoor Srivathsan
BACKGROUND: Torsades de pointes (TdP) is a polymorphic ventricular tachycardia associated with QT prolongation. Propofol is a sedative-anesthetic with proarrhythmic effects on cardiac myocytes. We performed a retrospective study to determine the incidence of TdP following propofol exposure at Mayo Clinic (Rochester, MN) from 08/11/1998-11/20/2015. METHODS: We queried our database using key search terms to identify patients exposed to propofol who developed TdP perioperatively or during non-surgical sedation...
January 4, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28100014/mg-2-improves-the-thermotolerance-of-probiotic-lactobacillus-rhamnosus-gg-lactobacillus-casei-zhang-and-lactobacillus-plantarum-p-8
#5
Yi Yang, Song Huang, Juan Wang, Gwénaël Jan, Romain Jeantet, Xiao Dong Chen
Food related carbohydrates and proteins are often used as thermoprotectant for probiotic lactobacilli during industrial production and processing. However, the effect of inorganic salts is rarely reported. Magnesium is the second-most abundant cation in bacteria, and commonly found in various foods. Mg(2+) homeostasis is important in Salmonella and has been reported to play a critical role in their thermotolerance. However, Mg(2+) role in thermotolerance of other bacteria, in particular probiotic bacteria, still remains a hypothesis...
January 18, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28099693/factors-associated-with-maternal-mortality-among-patients-meeting-criteria-of-severe-maternal-morbidity-and-near-miss
#6
Hesly M P Lima, Francisco Herlânio C Carvalho, Francisco Edson L Feitosa, George C Nunes
OBJECTIVE: To evaluate factors associated with maternal death among women experiencing life-threatening conditions during pregnancy, childbirth, or within 42 days of termination of pregnancy. METHODS: A secondary analysis of data prospectively collected in a Brazilian multicenter cross-sectional study between July 2009 and June 2010 was conducted. Women were identified who delivered at a hospital in Ceará and who had potentially life-threatening conditions. Stepwise logistic regression was used to identify factors associated with maternal death...
December 7, 2016: International Journal of Gynaecology and Obstetrics
https://www.readbyqxmd.com/read/28099570/variation-of-the-interphase-heterochromatin-in-artemia-crustacea-anostraca-of-the-americas-is-related-to-changes-in-nuclear-size-and-ionic-composition-of-hipersaline-habitats
#7
M Parraguez, G Gajardo
The populations of Artemia (or brine shrimp) from the Americas exhibit a wide variation in the amount of interphase heterochromatin. There is interest in understanding how this variation affects different parameters, from the cellular to the organismal levels. This should help to clarify the ability of this organism to tolerate brine habitats regularly subject to strong abiotic changes. In this study, we assessed the amount of interphase heterochromatin per nucleus based on chromocenter number (N-CHR) and relative area of chromocenter (R-CHR) in two species of Artemia, A...
January 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28098840/comparative-solid-state-stability-of-perindopril-active-substance-vs-pharmaceutical-formulation
#8
Valentina Buda, Minodora Andor, Adriana Ledeti, Ionut Ledeti, Gabriela Vlase, Titus Vlase, Carmen Cristescu, Mirela Voicu, Liana Suciu, Mirela Cleopatra Tomescu
This paper presents the results obtained after studying the thermal stability and decomposition kinetics of perindopril erbumine as a pure active pharmaceutical ingredient as well as a solid pharmaceutical formulation containing the same active pharmaceutical ingredient (API). Since no data were found in the literature regarding the spectroscopic description, thermal behavior, or decomposition kinetics of perindopril, our goal was the evaluation of the compatibility of this antihypertensive agent with the excipients in the tablet under ambient conditions and to study the effect of thermal treatment on the stability of perindopril erbumine...
January 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28097085/interaction-with-adenylate-cyclase-toxin-from-bordetella-pertussis-affects-the-metal-binding-properties-of-calmodulin
#9
Tzvia I Springer, Corey C Emerson, Christian W Johns, Natosha L Finley
Adenylate cyclase toxin domain (CyaA-ACD) is a calmodulin (CaM)-dependent adenylate cyclase involved in Bordetella pertussis pathogenesis. Calcium (Ca(2+)) and magnesium (Mg(2+)) concentrations impact CaM-dependent CyaA-ACD activation, but the structural mechanisms remain unclear. In this study, NMR, dynamic light scattering, and native PAGE were used to probe Mg(2+)-induced transitions in CaM's conformation in the presence of CyaA-ACD. Mg(2+) binding was localized to sites I and II, while sites III and IV remained Ca(2+) loaded when CaM was bound to CyaA-ACD...
January 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28096446/the-rpn-yhga-like-proteins-of-escherichia-coli-k-12-and-their-contribution-to-reca-independent-horizontal-transfer
#10
Anthony W Kingston, Christine Ponkratz, Elisabeth A Raleigh
: Bacteria use a variety of DNA mobilizing enzymes to facilitate environmental niche adaptation via horizontal gene transfer. This has led to real world problems, like the spread of antibiotic resistance, yet many mobilization proteins remain undefined. Here, we investigate the uncharacterized family of YhgA-like "transposase_31" proteins (PF04754). Our primary focus was the genetic and biochemical properties of the five E. coli K-12 members of this family, which we designate RpnA-RpnE for recombination promoting nuclease...
January 17, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28096139/potential-health-benefits-of-combining-yogurt-and-fruits-based-on-their-probiotic-and-prebiotic-properties
#11
REVIEW
Melissa Anne Fernandez, André Marette
Fruit and yogurt have been identified individually as indicators of healthy dietary patterns. Fruits are relatively low in energy density and are an excellent source of antioxidants and prebiotic fibers and polyphenols, which can promote digestive health. Yogurt, on the other hand, is a nutrient-dense food that is a good source of dairy protein, calcium, magnesium, vitamin B-12, conjugated linoleic acid, and other key fatty acids. In addition, it contains beneficial bacterial cultures, making it a potential source of probiotics...
January 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28096125/dietary-supplements-and-risk-of-cause-specific-death-cardiovascular-disease-and-cancer-a-systematic-review-and-meta-analysis-of-primary-prevention-trials
#12
REVIEW
Lukas Schwingshackl, Heiner Boeing, Marta Stelmach-Mardas, Marion Gottschald, Stefan Dietrich, Georg Hoffmann, Anna Chaimani
Our aim was to assess the efficacy of dietary supplements in the primary prevention of cause-specific death, cardiovascular disease (CVD), and cancer by using meta-analytical approaches. Electronic and hand searches were performed until August 2016. Inclusion criteria were as follows: 1) minimum intervention period of 12 mo; 2) primary prevention trials; 3) mean age ≥18 y; 4) interventions included vitamins, fatty acids, minerals, supplements containing combinations of vitamins and minerals, protein, fiber, prebiotics, and probiotics; and 5) primary outcome of all-cause mortality and secondary outcomes of mortality or incidence from CVD or cancer...
January 2017: Advances in Nutrition
https://www.readbyqxmd.com/read/28095795/intrathecal-magnesium-sulfate-does-not-reduce-the-ed50-of-intrathecal-hyperbaric-bupivacaine-for-cesarean-delivery-in-healthy-parturients-a-prospective-double-blinded-randomized-dose-response-trial-using-the-sequential-allocation-method
#13
Fei Xiao, Wenping Xu, Ying Feng, Feng Fu, Xiaomin Zhang, Yinfa Zhang, Lizhong Wang, Xinzhong Chen
BACKGROUND: Addition of intrathecal magnesium sulfate to local anesthetics has been reported to potentiate spinal anesthesia and prolong analgesia in parturients. The current study was to determine whether intrathecal magnesium sulfate would reduce the dose of hyperbaric bupivacaine in spinal anesthesia with bupivacaine and sufentanil for cesarean delivery. METHODS: Sixty healthy parturients undergoing scheduled cesarean delivery were randomly assigned to receive spinal anesthesia with 0...
January 17, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28094304/the-different-expression-of-trpm7-and-magt1-impacts-on-the-proliferation-of-colon-carcinoma-cells-sensitive-or-resistant-to-doxorubicin
#14
Alessandra Cazzaniga, Claudia Moscheni, Valentina Trapani, Federica I Wolf, Giovanna Farruggia, Azzurra Sargenti, Stefano Iotti, Jeanette A M Maier, Sara Castiglioni
The processes leading to anticancer drug resistance are not completely unraveled. To get insights into the underlying mechanisms, we compared colon carcinoma cells sensitive to doxorubicin with their resistant counterpart. We found that resistant cells are growth retarded, and show staminal and ultrastructural features profoundly different from sensitive cells. The resistant phenotype is accompanied by the upregulation of the magnesium transporter MagT1 and the downregulation of the ion channel kinase TRPM7...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28093909/transition-metal-free-amination-of-pyridine-2-sulfonyl-chloride-and-related-n-heterocycles-using-magnesium-amides
#15
Moritz Balkenhohl, Cyril François, Daniela Sustac Roman, Pauline Quinio, Paul Knochel
A new transition-metal-free amination of pyridine-2-sulfonyl chloride and related N-heterocycles using magnesium amides of type R2NMgCl·LiCl is reported. Additionally, the directed ortho-magnesiation of pyridine-2-sulfonamides using TMPMgCl·LiCl was investigated. Reaction of the magnesium intermediates with various electrophiles and subsequent amination using magnesium amides led to a range of 2,3-functionalized pyridines. Also, cyclization reactions providing an aza-indole and an aza-carbazole were carried out...
January 17, 2017: Organic Letters
https://www.readbyqxmd.com/read/28093674/prospect-of-recovering-phosphorus-in-magnesium-slag-packed-wetland-filter
#16
Xianqiang Tang, Min Wu, Rui Li, Zhenhua Wang
Phosphorus recovery from wastewater not only reduces the unbearable impacts of excessive nutrient discharge on environmental systems but also favor the reuse of phosphorus resource. Based on the mechanism as well as technical analysis for major phosphorus recovery techniques including struvite precipitation and wetland substrate adsorption, a novel magnesium slag-packed wetland filter and corresponding operational procedures are proposed, which aim to reduce the dependence of using magnesium-containing chemical reagent as magnesium sources for struvite precipitation, and improve the accumulation and recovery performance for struvite precipitation within porous wetland substrate...
January 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28093121/phenyltrichlorosilane-functionalized-magnesium-oxide-microspheres-preparation-characterization-and-application-for-the-selective-extraction-of-dioxin-like-polycyclic-aromatic-hydrocarbons-in-soils-with-matrix-solid-phase-dispersion
#17
Dongqin Tan, Jing Jin, Fang Li, Xiaoli Sun, Dhanjai, Yuwen Ni, Jiping Chen
Magnesium oxide microspheres functionalized with phenyltrichlorosilane (PTS-MgO) were synthesized by surface modification through silanization reaction, which was confirmed by Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetry analysis (TGA) and N2 adsorption-desorption. The result indicated that PTS-MgO not only possessed the ability of enhancing the retention with PAHs, but also weakening the interference from chlorinated compounds. As a sorbent for the matrix solid-phase dispersion (MSPD) extraction, PTS-MgO was used to selectively extract seven dioxin-like polycyclic aromatic hydrocarbons (DL-PAHs) from soil samples...
March 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28092980/hydrogeochemical-and-isotope-study-of-perched-aquifers-in-the-cuvelai-etosha-basin-namibia
#18
Josefina T Hamutoko, Heike Wanke, Paul Koeniger, Matthias Beyer, Marcel Gaj
A hydrogeochemical and stable isotope study ((2)H and (18)O) was carried out in the Cuvelai-Etosha Basin in order to characterize available groundwater and to identify possible recharge mechanisms for the perched aquifers. Data were collected during seven field campaigns between 2013 and 2015 from a total of 24 shallow and deep groundwater hand-dug wells. In the investigated groundwaters, hydrogencarbonate is the dominating anion in both well types, whereas cations vary between calcium and magnesium in deep wells, and sodium and potassium in shallow wells...
January 16, 2017: Isotopes in Environmental and Health Studies
https://www.readbyqxmd.com/read/28092849/magnesium-and-manganese-affect-photosynthesis-essential-oil-composition-and-phenolic-compounds-of-tanacetum-parthenium
#19
Soudeh Farzadfar, Fatemeh Zarinkamar, Mostafa Hojati
The accumulation of plant defense metabolites is closely associated with the concentration of nutrient elements, yet data related to the interactive effects of two nutrients on the deployment of phenolics and terpenoids are scare. In the present study, the interaction between magnesium (Mg) and manganese (Mn) on nutrient uptake, photosynthesis, oxidative status and the accumulation of phenolics and terpenoids in the leaves of feverfew plants grown at different concentrations of Mg and Mn was investigated. Nutrient uptake and photosynthesis were associated with the amount of applied Mg but could be modified by the concentration of Mn...
January 3, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28091750/ectomycorrhizal-fungal-diversity-associated-with-endemic-tristaniopsis-spp-myrtaceae-in-ultramafic-and-volcano-sedimentary-soils-in-new-caledonia
#20
Muhammad Waseem, Marc Ducousso, Yves Prin, Odile Domergue, Laure Hannibal, Clarisse Majorel, Philippe Jourand, Antoine Galiana
New Caledonian serpentine (ultramafic) soils contain high levels of toxic heavy metals, in particular nickel, (up to 20 g kg(-1)) and are deficient in essential elements like carbon, nitrogen and phosphorus while having a high magnesium/calcium ratio. Although previous studies showed that ectomycorrhizal symbioses could play an important role in the adaptation of the endemic plants to ultramafic soils (FEMS Microbiol Ecol 72:238-49, 2010), none of them have compared the diversity of microbial communities from ultramafic vs non-ultramafic soils in New Caledonia...
January 13, 2017: Mycorrhiza
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