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https://www.readbyqxmd.com/read/28651408/-identification-and-evaluation-of-t-cell-epitopes-of-rv0585c-from-mycobacterium-tuberculosis
#1
X X Wang, X Chen, Y Q Li, T Y Xiao, Y Jiang, M C Li, H C Liu, K L Wan
Objective: To investigate the human T cell epitopes of Mycobacterium (M.) tuberculosis Rv0585c protein antigen and their immunogenicity and provide evidence for the development of specific tuberculosis immune diagnostic techniques and tuberculosis vaccine. Methods: We synthesized peptides from M. tuberculosis Rv0585c protein antigen predicted by TE-predict and IEDB human T cell epitope prediction tool. The cellular immunoreactivity of the predicted peptides was evaluated through ELISpot assay with the peripheral blood monouclear cells (PBMC) of clinical tuberculosis patients...
May 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28651313/defect-engineered-oxides-for-enhanced-mechanochemical-destruction-of-halogenated-organic-pollutants
#2
Giovanni Cagnetta, Jun Huang, Mengnan Lu, Bin Wang, Yujue Wang, Shubo Deng, Gang Yu
Mechanochemical activation of metal oxides is studied by a novel methodology based on solid state reaction with a stable radical specie. Such approach corroborates that vacancy formation by high energy ball milling, also in nonreducible oxides, is responsible for electron release on particles' surfaces. This finding suggests a new defect engineering strategy to improve effectiveness of metal oxides as co-milling reagent for halogenated organic pollutant destruction. Results prove that high valent metal doping of a commonly employed co-milling reagent such as CaO determines 2...
June 19, 2017: Chemosphere
https://www.readbyqxmd.com/read/28651174/label-free-chronopotentiometric-glycoprofiling-of-prostate-specific-antigen-using-sialic-acid-recognizing-lectins
#3
Stefan Belicky, Hana Černocká, Tomas Bertok, Alena Holazova, Kamila Réblová, Emil Paleček, Jan Tkac, Veronika Ostatná
In recent decades, it has become clear that most of human proteins are glycosylated and that protein glycosylation plays an important role in health and diseases. At present, simple, fast and inexpensive methods are sought for clinical applications and particularly for improved diagnostics of various diseases, including cancer. We propose a label- and reagent-free electrochemical method based on chronopotentiometric stripping (CPS) analysis and a hanging mercury drop electrode for the detection of interaction of sialylated protein biomarker a prostate specific antigen (PSA) with two important lectins: Sambucus nigra agglutinin (SNA) and Maackia amurensis agglutinin (MAA)...
June 19, 2017: Bioelectrochemistry
https://www.readbyqxmd.com/read/28651081/inactivation-of-pathogenic-microorganisms-in-freshwater-using-hso5-uv-a-led-and-hso5-m-n-uv-a-led-oxidation-processes
#4
Jorge Rodríguez-Chueca, Tatiana Silva, José R Fernandes, Marco S Lucas, Gianluca Li Puma, José A Peres, Ana Sampaio
Freshwater disinfection using photolytic and catalytic activation of peroxymonosulphate (PMS) through PMS/UV-A LED and PMS/M(n+)/UV-A LED [M(n+) = Fe(2+) or Co(2+)] processes was evaluated through the inactivation of three different bacteria: Escherichia coli (Gram-negative), Bacillus mycoides (sporulated Gram-positive), Staphylococcus aureus (non-sporulated Gram-positive), and the fungus Candida albicans. Photolytic and catalytic activation of PMS were effective in the total inactivation of the bacteria using 0...
June 10, 2017: Water Research
https://www.readbyqxmd.com/read/28650332/nepeta-rtanjensis-lamiaceae-a-plant-endemic-to-the-balkans-phenolic-composition-antioxidant-activity-and-in-vitro-antigenotoxic-effects-in-triiodothyronine-induced-dna-damage-in-human-lymphocytes
#5
Jasna Bošnjak-Neumüller, Milena Radaković, Ninoslav Djelić, Branka Vuković-Gačić, Zora Dajić Stevanović, Stoimir Kolarević, Danijela Mišić, Milan Stanković, Jelena Knežević-Vukčević, Biljana Spremo-Potparević, Zoran Stanimirović
The success of antioxidant therapy in hyperthyroidism implies that disease is mediated by oxidative stress, which is known as one of the causing agents of ageing, degenerative diseases, and cancer. The main objective of our study was to determine possible protective effects of methanolic extract of N. rtanjensis in triiodothyronine (T3)-induced DNA breaks of human lymphocytes under in vitro conditions, based upon plant antioxidant capacity related to its phytochemical profile, mainly its polyphenolic complex...
March 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28650097/low-cost-perovskite-solar-cells-employing-dimethoxydiphenylamine-substituted-bistricyclic-aromatic-enes-as-hole-transporting-materials
#6
Mohammad Khaja Nazeeruddin, Kasparas Rakstys, Sanghyun Paek, Giulia Grancini, Peng Gao, Vygintas Jankauskas, Abdullah M Asiri
The synthesis, characterization and photovoltaic performance of series of novel molecular hole transporting materials (HTMs) based on bistricyclic aromatic enes (BAEs) are presented. The new derivatives have been obtained following the simple and straightforward two-step procedure from inexpensive starting reagents mimicking the synthetically challenging 9,9'-spirobifluorene moiety of the well-studied spiro-OMeTAD. The novel HTMs are tested in mixed caions and anions perovskite solar cells (PSCs) yielding power conversion efficiency (PCE) of 19...
June 26, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28649981/a-practical-and-catalyst-free-trifluoroethylation-reaction-of-amines-using-trifluoroacetic-acid
#7
Keith G Andrews, Radmila Faizova, Ross M Denton
Amines are a fundamentally important class of biologically active compounds and the ability to manipulate their physicochemical properties through the introduction of fluorine is of paramount importance in medicinal chemistry. Current synthesis methods for the construction of fluorinated amines rely on air and moisture sensitive reagents that require special handling or harsh reductants that limit functionality. Here we report practical, catalyst-free, reductive trifluoroethylation reactions of free amines exhibiting remarkable functional group tolerance...
June 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28649781/anti-d-reagents-should-be-chosen-accordingly-to-the-prevalence-of-d-variants-in-the-obstetric-population
#8
Jelena Lukacevic Krstic, Slavica Dajak, Jasna Bingulac-Popovic, Vesna Dogic, Jela Mratinovic-Mikulandra
BACKGROUND: Resolving ambiguous results of D antigen typing is crucial for appropriate and rational administration of anti-D immunoprophylaxis and transfusion practice in obstetric population. The aim of the study was to establish selection criteria of anti-D reagents for our population. METHODS: A total of 12 689 samples from primiparous women in Split-Dalmatia County, Croatia, were typed for RhD antigen during the period of 5 years. Ambiguous results were submitted to additional serologic investigation and genotyping...
June 26, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28649420/functionally-and-morphologically-damaged-mitochondria-observed-in-auditory-cells-under-senescence-inducing-stress
#9
Teru Kamogashira, Ken Hayashi, Chisato Fujimoto, Shinichi Iwasaki, Tatsuya Yamasoba
We aimed at determining the mitochondrial function in premature senescence model of auditory cells. Short exposure to H2O2 (1 h, 0.1 mM) induced premature cellular senescence in House Ear Institute-Organ of Corti 1 auditory cells. The transmission electron microscopy analysis revealed that damaged mitochondria and autophagosomes containing dense organelles appeared in the auditory cells after short exposure to H2O2. The branch and junction parameters of the skeletonized image of the mitochondria were found to decrease significantly in H2O2-treated cells...
2017: NPJ Aging and Mechanisms of Disease
https://www.readbyqxmd.com/read/28649076/renal-clearance-and-urinary-excretion-of-omeprazole-in-healthy-female-volunteers-in-pakistan
#10
Nazia Qadir, Tanweer Khaliq, Rai Altaf Hussain, Ghulam Abbas Shah, Sadia Asharaf, Ahmad Raza, Nadia Noor
Omeprazole is a widely prescribed proton pump inhibitor to treat various gastric acid hyper secretion disorders. The present study was designed to evaluate the renal clearance and urinary excretion of omeprazole in eight healthy female volunteers to increase the understanding of the contributing factors such as demographics variability in the renal clearance and urinary excretion of omeprazole under indigenous conditions. The urine and blood samples were collected 0.5, 1, 1.5, 2, 3, 4, 6, 8 hours after oral administration of enteric coated omeprazole (20 mg) and drug concentration in the samples was determined by High Performance Liquid Chromatography (HPLC) with C18 column and UV detector...
March 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28649067/pharmacognostic-and-phytochemical-studies-of-zanthoxylum-armatum-dc
#11
- Barkatullah, Muhammad Ibrar, Naveed Muhammad, Ajmal Khan, Shahid Ali Khan, Salman Zafar, Samin Jan, Nadia Riaz, Zain Ullah, Umar Farooq, Javid Hussain
The pharmacognostic and phytochemical investigations on the leaf, stem bark, and fruit of Zanthoxylum armatum were carried out. Macroscopic study of leaf, stem bark, and fruit of Z. armatum revealed some of the characteristic features like size, shape, color, odor and taste of the crude drug. Distinguishing fragments were identified from the powder drug. Leaf, bark, and fruit powder of this plant have higher values of total, acid insoluble, and water soluble ash as compared to the powder of this plant exhausted with ethanol and n- hexane...
March 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28649012/small-molecule-probes-of-protein-aggregation
#12
REVIEW
Lydia M Young, Alison E Ashcroft, Sheena E Radford
Understanding the mechanisms of amyloid formation and toxicity remain major challenges. Although substantial progress has been made in the development of methods able to identify the species formed during self-assembly and to describe the kinetic mechanisms of aggregation, the structure(s) of non-native species, including potentially toxic oligomers, remain elusive. Moreover, how fibrils contribute to disease remains unclear. Here we review recent advances in the development of small molecules and other reagents that are helping to define the mechanisms of protein aggregation in molecular detail...
June 22, 2017: Current Opinion in Chemical Biology
https://www.readbyqxmd.com/read/28648786/selective-screening-of-glutaric-acid-acidurias-by-capillary-electrophoresis-mass-spectrometry
#13
Jaime Fernández-Bravo, Fernando de Andrés, Mohammed Zougagh, Ángel Ríos
A sensitive and selective method for the separation and quantification of the three organic acids 3-hydroxy-3-methylglutaric acid, 3-methylglutaric acid, and glutaric acid in human urine samples by CE with mass spectrometry detection has been developed. This methodology is faster, simpler and less time-consuming, than other methodologies previously described, and requires of reduced amounts of reagents as well. Samples are first filtered and then diluted in water. For the electrophoretic separation, a 20mM ammonium acetate and 10% methanol solution at pH 9...
June 19, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28648084/practical-broadly-applicable-%C3%AE-selective-z-selective-diastereoselective-and-enantioselective-addition-of-allylboron-compounds-to-mono-di-tri-and-polyfluoroalkyl-ketones
#14
Farid W van der Mei, Changming Qin, Ryan J Morrison, Amir H Hoveyda
A practical method for enantioselective synthesis of fluoroalkyl-substituted Z-homoallylic tertiary alcohols has been developed. Reactions may be performed with ketones containing a polylfluoro-, trifluoro-, difluoro-, and monofluoroalkyl group along with an aryl, a heteroaryl, an alkenyl, an alkynyl, or an alkyl substituent. Readily accessible unsaturated organoboron compounds serve as reagents. Transformations were performed with 0.5-2.5 mol % of a boron-based catalyst, generated in situ from a readily accessible valine-derived aminophenol and a Z- or an E-γ-substituted boronic acid pinacol ester...
June 24, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28648083/temporal-signal-pattern-recognition-in-mass-spectrometry-a-method-for-rapid-identification-and-accurate-quantification-of-biomarkers-for-inborn-errors-of-metabolism-with-quality-assurance
#15
Alicia DiBattista, Nathan McIntosh, Monica Lamoureux, Osama Al-Dirbashi, Pranesh Chakraborty, Philip Britz-McKibbin
Mass spectrometry (MS)-based metabolomic initiatives that use conventional separation techniques are limited by low sample throughput and complicated data processing that contribute to false discoveries. Herein, we introduce a new strategy for unambiguous identification and accurate quantification of biomarkers for inborn errors of metabolism (IEM) from dried blood spots (DBS) with quality assurance. A multiplexed separation platform based on multisegment injection-capillary electrophoresis-mass spectrometry (MSI-CE-MS) was developed to provide comparable sample throughput to flow injection analysis-tandem MS (FIA-MS/MS), but with greater selectivity as required for confirmatory testing and discovery-based metabolite profiling of volume-restricted biospecimens...
June 25, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28647147/capillary-electrophoresis-with-stationary-nanogel-zones-of-galactosidase-and-erythrina-cristagalli-lectin-for-the-determination-of-%C3%AE-1-3-linked-galactose-in-glycans
#16
Lisa A Holland, Srikanth Gattu, Cassandra L Crihfield, Lloyd Bwanali
A thermally responsive nanogel is used to create stationary zones of enzyme and lectin in a separation capillary. Once patterned in the capillary, analyte is driven through the zone, where it is converted to a specific product if an enzyme is used or captured if a lectin is used. These stationary zones are easily expelled after the analysis and then re-patterned in the capillary. The nanogel is compatible with enzymes and lectins and improves the stability of galactosidase, enabling more cost-effective use of biological reagents that provide insight into glycan structure...
June 16, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28646043/an-efficient-flp-based-toolkit-for-spatiotemporal-control-of-gene-expression-in-caenorhabditis-elegans
#17
Celia María Muñoz-Jiménez, Cristina Ayuso, Agnieszka Dobrzynska, Antonio Torres, Patricia de la Cruz Ruiz, Peter Askjaer
Site-specific recombinases are potent tools to regulate gene expression. In particular, the Cre and FLP enzymes are widely used to either activate or inactivate genes in a precise spatiotemporal manner. Both recombinases work efficiently in the popular model organism Caenorhabditis elegans but their use in this nematode is still only sporadic. To increase the utility of the FLP system in C. elegans we have generated a series of single-copy transgenic strains that stably express an optimized version of FLP in specific tissues or by heat induction...
June 23, 2017: Genetics
https://www.readbyqxmd.com/read/28644627/rhodium-iii-catalyzed-acylation-of-c-sp-3-h-bonds-with-cyclopropenones
#18
Lingheng Kong, Xukai Zhou, Youwei Xu, Xingwei Li
Rh(III)-catalyzed activation and acylation of sp(3) C-H bonds has been realized with diarylcyclopropenone as an acylating reagent. Both benzylic C-H in 8-methylquinolines and unactivated C-H in 2-alkylpyridines are applicable in this C-H acylation reaction, providing enones in good yields under redox-neutral conditions.
June 23, 2017: Organic Letters
https://www.readbyqxmd.com/read/28644609/galnac-tyrosine-is-a-ligand-of-plant-lectins-antibodies-and-human-and-murine-macrophage-galactose-type-lectins
#19
Ruslan Gibadullin, David Wayne Farnsworth, Joseph J Barchi, Jeffrey C Gildersleeve
In 2011, a new type of protein O-glycosylation was discovered in which N-acetylgalactosamine is attached to the side chain of tyrosine (GalNAc-Tyr). While present on dozens of proteins, the biological roles of GalNAc-Tyr are unknown. To gain insight into this new type of modification, we synthesized a group of GalNAc-Tyr glycopeptides, constructed microarrays, and evaluated potential recognition of GalNAc-Tyr by a series of glycan-binding proteins. Through a series of >150 microarray experiments, we assessed binding properties of a variety of plant lectins, monoclonal antibodies, and endogenous lectins...
June 23, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28644480/a-polymer-nanoparticle-with-engineered-affinity-for-a-vascular-endothelial-growth-factor-vegf165
#20
Hiroyuki Koide, Keiichi Yoshimatsu, Yu Hoshino, Shih-Hui Lee, Ai Okajima, Saki Ariizumi, Yudai Narita, Yusuke Yonamine, Adam C Weisman, Yuri Nishimura, Naoto Oku, Yoshiko Miura, Kenneth J Shea
Protein affinity reagents are widely used in basic research, diagnostics and separations and for clinical applications, the most common of which are antibodies. However, they often suffer from high cost, and difficulties in their development, production and storage. Here we show that a synthetic polymer nanoparticle (NP) can be engineered to have many of the functions of a protein affinity reagent. Polymer NPs with nM affinity to a key vascular endothelial growth factor (VEGF165) inhibit binding of the signalling protein to its receptor VEGFR-2, preventing receptor phosphorylation and downstream VEGF165-dependent endothelial cell migration and invasion into the extracellular matrix...
July 2017: Nature Chemistry
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