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https://www.readbyqxmd.com/read/29783192/interaction-of-dna-and-mononucleotides-with-theophylline-investigated-using-electrochemical-biosensors-and-biosensing
#1
Katarína Nemčeková, Ján Labuda, Viktor Milata, Jana Blaškovičová, Jozef Sochr
The understanding of DNA-drug interaction mechanism is among the important aspects of biological studies for drug design, discovery and pharmaceutical development processes. Published rather detailed FTIR and UV-visible spectroscopic studies on the interactions of theophylline, theobromine and caffeine with calf thymus DNA have shown effective binding of these methylxanthine derivatives to DNA and RNA involving H-bonds. However, to our knowledge, there is no such investigation using electrochemical approach...
May 3, 2018: Bioelectrochemistry
https://www.readbyqxmd.com/read/29783178/an-alternative-approach-for-nitrate-and-arsenic-removal-from-wastewater-via-a-nitrate-dependent-ferrous-oxidation-process
#2
Meilin Zhang, Yingfen Li, Xinxian Long, Yunxiao Chong, Guangwei Yu, Zihao He
Owing to the high efficiency of converting nitrate to nitrogen gas with ferrous iron as the electron donor, the process of nitrate-dependent ferrous oxidation (NDFeO) has been considered suitable to treat wastewater that contains nitrate but lacks organic matter. Meanwhile, arsenic immobilization often has been found during the NDFeO reaction. Thus, it was strongly expected that nitrate and arsenic could be removed simultaneously in co-contaminated wastewater through the NDFeO process. However, in the current work, arsenic was not removed during the NDFeO process when the pH was high (above 8), though the nitrate reduction rate was over 90%...
May 18, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29783159/fas-fasl-interaction-mediates-imbalanced-cytokine-cytotoxicity-responses-of-inkt-cells-against-jurkat-cells
#3
Rui Dou, Zhenya Hong, Xiaosheng Tan, Fenfen Hu, Yajie Ding, Wei Wang, Zhihui Liang, Rongrong Zhong, Xiongwen Wu, Xiufang Weng
The rapid antitumor cytokine production and direct cytotoxicity confer invariant NKT (iNKT) cells ideal candidates for cancer therapy. However, the therapeutic potential of iNKT cells in T-cell malignant diseases remains elusive, as antigen presentation by T cells (T-T presentation) has been suggested to induce hyporesponsiveness of iNKT cells. In this study, we found discrepancies in iNKT cell responses against two T cell-origin cell lines (Jurkat and Molt-4). Human iNKT cells exhibited more intensive cytotoxicity and less efficient cytokine production in response to Fas-bearing Jurkat cells than those to the Fas-negative tumor cells (Molt-4 and myeloid-derived K562)...
May 18, 2018: Molecular Immunology
https://www.readbyqxmd.com/read/29783148/comparative-study-of-six-sequential-spectrophotometric-methods-for-quantification-and-separation-of-ribavirin-sofosbuvir-and-daclatasvir-an-application-on-laboratory-prepared-mixture-pharmaceutical-preparations-spiked-human-urine-spiked-human-plasma-and-dissolution
#4
Wafaa S Hassan, Manal S Elmasry, Heba M Elsayed, Dalia W Zidan
In accordance with International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use (ICH) guidelines, six novel, simple and precise sequential spectrophotometric methods were developed and validated for the simultaneous analysis of Ribavirin (RIB), Sofosbuvir (SOF), and Daclatasvir (DAC) in their mixture without prior separation steps. These drugs are described as co-administered for treatment of Hepatitis C virus (HCV). HCV is the cause of hepatitis C and some cancers such as liver cancer (hepatocellular carcinoma) and lymphomas in humans...
May 18, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29783143/metallic-nanocatalysts-for-electrochemical-co-2-reduction-in-aqueous-solutions
#5
Yuanxing Wang, Cailing Niu, Dunwei Wang
How to effectively and efficiently reduce carbon dioxide (CO2 ) to value-added chemicals represent a frontier in catalysis research. Due to the high activation energy needs and the endothermic nature of CO2 reduction, the reactions are difficult to carry out. When H2 O is present, hydrogen evolution reactions (HER) often compete favorably with CO2 reduction reactions. For these reactions, catalysts are of critical importance to CO2 reduction. In this article, we review the various metal nanocatalysts for electrochemical CO2 reduction (ECR) reactions...
May 16, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29783141/graphene-oxide-and-carbon-nanodots-co-modified-biobr-nanocomposites-with-enhanced-photocatalytic-4-chlorophenol-degradation-and-mechanism-insight
#6
Songying Qu, Yuhan Xiong, Jun Zhang
Non-metallic graphene oxide (GO) and carbon nanodots (CDots) co-doped BiOBr ternary system (GO/CDots/BiOBr) were successfully synthesized via a simple one-step solvothermal process. The compositional characterization, optical and electrical properties of photocatalysts were investigated in detail. The prepared ternary photocatalysts possessed the excellent visible-light driven photocatalytic 4-chlorophenol (4-CP) degradation. Additionally, the 4-CP removal efficiencies decreased in the order of GO/CDots/BiOBr (88...
May 15, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29783131/effect-of-trace-element-addition-and-increasing-organic-loading-rates-on-the-anaerobic-digestion-of-cattle-slaughterhouse-wastewater
#7
Thomas Schmidt, Bernadette K McCabe, Peter W Harris, Seonmi Lee
In this study, anaerobic digestion of slaughterhouse wastewater with the addition of trace elements was monitored for biogas quantity, quality and process stability using CSTR digesters operated at mesophilic temperature. The determination of trace element concentrations was shown to be deficient in Fe, Ni, Co, Mn and Mo compared to recommendations given in the literature. Addition of these trace elements resulted in enhanced degradation efficiency, higher biogas production and improved process stability. Higher organic loading rates and lower hydraulic retention times were achieved in comparison to the control digesters...
May 18, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29783114/geosphere-biosphere-circulation-of-chemical-elements-in-soil-and-plant-systems-from-a-100-km-transect-from-southern-central-norway
#8
Clemens Reimann, Karl Fabian, Belinda Flem, Malin Andersson, Peter Filzmoser, Peter Englmaier
Geochemical element separation is studied in 14 different sample media collected at 41 sites along an approximately 100-km long transect north of Oslo. At each site, soil C and O horizons and 12 plant materials (birch/spruce/cowberry/blueberry leaves/needles and twigs, horsetail, braken fern, pine bark and terrestrial moss) were sampled. The observed concentrations of 29 elements (K, Ca, P, Mg, Mn, S, Fe, Zn, Na, B, Cu, Mo, Co, Al, Ba, Rb, Sr, Ti, Ni, Pb, Cs, Cd, Ce, Sn, La, Tl, Y, Hg, Ag) were used to investigate soil-plant relations, and to evaluate the element differentiation between different plants, or between foliage and twigs of the same plant...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29783111/polymeric-nanocomposites-for-the-removal-of-acid-red-52-dye-from-aqueous-solutions-synthesis-characterization-kinetic-and-isotherm-studies
#9
A Gouthaman, Raja S Azarudeen, A Gnanaprakasam, V M Sivakumar, M Thirumarimurugan
Polymeric nanocomposites polyaniline-polyvinylpyrrolidone (PAPV) and polyaniline-polyvinylpyrrolidone-neodymium/zinc oxide (PAPV-NZO) were synthesized for the effective dye removal through adsorption process. Neodymium doped zinc oxide (NZO) with various proportions of neodymium were prepared by chemical co-precipitation method and incorporated into the copolymer matrix via oxidative polymerization technique. NZO nanoparticles were characterized by X-ray diffraction (XRD) and the morphological features, and functional group linkages of the PAPV-NZO were confirmed by scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) analyses...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783087/association-of-t-and-non-t-cell-cytokines-with-anhedonia-role-of-gender-differences
#10
Manish K Jha, Andrew H Miller, Abu Minhajuddin, Madhukar H Trivedi
OBJECTIVE: Among individual depressive symptoms, anhedonia has been reliably associated with activation of the innate immune response. However, it is unclear whether this association extends to T cell cytokines and if gender differentially affects this association. METHOD: Concentrations of T (IL-17, T-helper (Th) 1- and Th2-) and non-T cell cytokines were measured in plasma using the Bioplex Pro™ human cytokine multiplex kit in Combining Medications to Enhance Depression Outcomes (CO-MED) trial participants who provided plasma at baseline (n = 166)...
May 12, 2018: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/29783032/the-eternal-recurrence-of-arteritis-suggesting-autoimmunity-underlining-friedrich-nietzsche-s-challenging-clinical-case
#11
Valeria Silvestri
Friedrich Wilhelm Nietzsche (Röcken 1844 -Weimar 1900), the philosopher that theorized the concept of "eternal recurrence", suffered lifelong of a multifaceted chronic illness, which started in paediatric age with severe headaches and ended with stroke at the age of 56. Even though in the last years many hypothetical diagnosis have been proposed, they all fail to explain the totality of clinical conditions that co-occurred in the philosopher's extremely challenging case, and debate on the matter is still open...
May 18, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29783029/comparison-of-stanford-b-aortic-dissection-patients-who-received-tevar-combined-with-or-without-sleep-apnea-syndrome
#12
Xin Li, Wenwu Cai, Ping Zhang, Kun Fang, Jieting Zhu, Chang Shu
BACKGROUND: Patients with Stanford B aortic dissection usually complicated with sleep apnea syndrome. This condition always threatens the patients' respiration situation. In this study, we collected and analysis data of patients' peri-operative managements of Thoracic Endovascular Aortic Repair (TEVAR) for Stanford B Aortic Dissection (AD) complicated with Sleep Apnea Syndrome (SAS). Comparison has been made between these SAS patients and those who without SAS. METHODS: Between June 2013 and June 2014, the clinical data and outcomes of the Stanford B AD patients in the department of vascular surgery in the Second Xiangya Hospital were retrospectively reviewed and studied...
May 18, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29782986/antiglycation-study-of-hmg-r-inhibitors-and-tocotrienol-against-glycated-bsa-and-ldl-a-comparative-study
#13
Rabia Nabi, Sahir Sultan Alvi, Rizwan Khan, Shafeeque Ahmad, Saheem Ahmad, M Salman Khan
Non-enzymatic glycation mediated advanced glycation end products (AGEs) generation results in the pathogenesis of diabetic complications and atherosclerotic cardiovascular disease (ASCVD) which is greatly influenced by 3-hydroxy-3-methyl-glutaryl Co-A reductase (HMG-R) activity. HMG-R inhibitors, statins, are well known for reducing mortality and morbidity of ASCVD in patients with diabetes due to their pleiotropic effects independent of cholesterol lowering. Due to distinct chemical structures, various statins may play important role in the inhibition of AGEs mediated pathologies...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29782941/dopamine-and-serotonin-metabolism-associated-with-morphine-reward-and-its-inhibition-with-buspirone-a-study-in-the-rat-striatum
#14
Darakhshan Jabeen Haleem, Shazia Nawaz, Tabinda Salman
Adaptations within the nucleus accumbens (NAc) and caudate nucleus (CN) dopamine neurotransmission are involved in behavioral sensitization and enhanced incentive motivation towards drug paired stimuli which lead to drug addiction. Serotonin (5-hydroxytryptamine; 5-HT) can modulate dopamine neurotransmission to reduce rewarding effects of drugs of abuse. A recent study from our laboratory shows that rewarding effects of morphine are inhibited in rats co-treated with buspirone. To understand the neurochemical mechanism involved in morphine addiction and its inhibition with buspirone, present study determines the effects of buspirone, morphine and their co-administration on the metabolism of serotonin and dopamine in the NAc and CN...
May 18, 2018: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/29782940/defining-osteoblast-and-adipocyte-lineages-in-the-bone-marrow
#15
J L Pierce, D L Begun, J J Westendorf, M E McGee-Lawrence
Bone is a complex endocrine organ that facilitates structural support, protection to vital organs, sites for hematopoiesis, and calcium homeostasis. The bone marrow microenvironment is a heterogeneous niche consisting of multipotent musculoskeletal and hematopoietic progenitors and their derivative terminal cell types. Amongst these progenitors, bone marrow mesenchymal stem/stromal cells (BMSCs) may differentiate into osteogenic, adipogenic, myogenic, and chondrogenic lineages to support musculoskeletal development as well as tissue homeostasis, regeneration and repair during adulthood...
May 18, 2018: Bone
https://www.readbyqxmd.com/read/29782892/a-glp-1-cck-fusion-peptide-harnesses-the-synergistic-effects-on-metabolism-of-cck-1-and-glp-1-receptor-agonism-in-mice
#16
David C Hornigold, Emma Roth, Victor Howard, Sarah Will, Stephanie Oldham, Matthew P Coghlan, Clemence Blouet, James L Trevaskis
Combination approaches for the treatment of metabolic diseases such as obesity and diabetes are becoming increasingly relevant. Co-administration of a glucagon-like peptide-1 receptor (GLP-1R) agonist with a cholecystokinin receptor-1 (CCKR1) agonist exert synergistic effects on weight loss in obese rodents. Here, we report on the effects of a novel fusion peptide (C2816) comprised of a stabilized GLP-1R agonist, AC3174, and a CCKR1-selective agonist, AC170222. C2816 was constructed such that AC3174 was linked to the N-terminus of AC170222, thus preserving the C-terminal amide of the CCK moiety...
May 18, 2018: Appetite
https://www.readbyqxmd.com/read/29782855/role-of-statins-and-mevalonate-pathway-on-impaired-hdac2-activity-induced-by-oxidative-stress-in-human-airway-epithelial-cells
#17
Maria Gabriella Matera, Luigino Calzetta, Giulia Gritti, Laura Gallo, Brunella Perfetto, Giovanna Donnarumma, Mario Cazzola, Paola Rogliani, Maria Donniacuo, Barbara Rinaldi
In patients with chronic obstructive pulmonary disease (COPD) the inflammatory response is often steroid-resistant, likely since oxidative stress and cigarette smoking impair histone deacetylase 2 (HDAC2) activity. Since it has been demonstrated that statins may restore the HDAC2 activity in cultured human endothelial cells, the aim of this study was to investigate the effects of statins in reversing the steroid-resistance induced by oxidative stress. We evaluated the effects of simvastatin and dexamethasone on HDAC2 expression and activity, and the role of mevalonate and Rho/ROCK pathways in A549 cells, a human lung type II epithelial cell line stressed with H2 O2 ...
May 18, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29782797/low-temperature-synthesized-h-2-ti-3-o-7-nanotubes-with-a-high-co-2-adsorption-property-by-amine-modification
#18
Misaki Ota, Yuichiro Hirota, Yoshiaki Uchida, Yasuhiro Sakamoto, Norikazu Nishiyama
Carbon dioxide (CO2 ) capture and storage (CCS) technologies have been attracted attention in terms of tackling with global warming. To date, various CO2 capture technologies including solvents, membranes, cryogenics and solid adsorbents have been proposed. Currently, a liquid adsorption method for CO2 using amine solution (monoethanolamine) has been practically used. However, this liquid phase CO2 adsorption process requires heat regeneration, and it can cause many problems such as corrosion of equipment and degradation of the solution...
May 21, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29782791/a-method-for-preparation-of-an-internal-layer-of-artificial-vascular-graft-co-modified-with-salvianolic-acid-b-and-heparin
#19
Haizhu Kuang, Yao Wang, Junfeng Hu, Chunsheng Wang, Shuyang Lu, Xiumei Mo
Studies have shown that traditional Chinese medicine Salvianolic acid B (SAB) can promote the proliferation and migration of endothelial cells. Heparin has a good anticoagulant effect. The inner layer of artificial vascular graft is fabricated by coaxial electrospinning method, and loaded with heparin and SAB. The release of heparin and SAB was sustained for almost 30 days, and SAB without initial burst release. Furthermore, the combined effect of SAB and heparin contributed to promoted Human Umbilical Vein Endothelial Cells (HUVECs) growth and improved blood compatibility of graft...
May 21, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29782694/metal-organic-framework-hybrid-assisted-formation-of-co-3-o-4-co-fe-oxide-double-shelled-nanoboxes-for-enhanced-oxygen-evolution
#20
Xiao Wang, Le Yu, Bu Yuan Guan, Shuyan Song, Xiong Wen David Lou
Rational design of complex metal-organic framework (MOF) hybrid precursors offers a great opportunity to construct various functional nanostructures. Here, a novel MOF-hybrid-assisted strategy to synthesize Co3 O4 /Co-Fe oxide double-shelled nanoboxes is reported. In the first step, zeolitic imidazolate framework-67 (ZIF-67, a Co-based MOF)/Co-Fe Prussian blue analogue (PBA) yolk-shell nanocubes are formed via a facile anion-exchange reaction between ZIF-67 nanocube precursors and [Fe(CN)6 ]3- ions at room temperature...
May 21, 2018: Advanced Materials
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