1,359,176 results match your criteria Chemical Communications [Journal]


(Pyrrolo-pyridin-5-yl)benzamides: BBB permeable monoamine oxidase B inhibitors with neuroprotective effect on cortical neurons.

Eur J Med Chem 2018 Nov 13;162:793-809. Epub 2018 Nov 13.

Bulgarian Academy of Sciences, Institute of Organic Chemistry, Centre of Phytochemistry, Acad. G. Bonchev Str., Bl. 9, Sofia, 1113, Bulgaria.

An extensive study was performed to develop a series of (pyrrolo-pyridin-5-yl)benzamides as reversible MAO-B inhibitors. Compounds 14 (NTZ-2020, hMAO-B IC = 1.11 nM, K = 0. Read More

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November 2018
2 Reads

A label-free impedimetric aptasensor for the detection of Bacillus anthracis spore simulant.

Biosens Bioelectron 2018 Nov 15;126:640-646. Epub 2018 Nov 15.

Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy. Electronic address:

Herein, we report an impedimetric DNA-based aptamer sensor for a single-step detection of B. anthracis spore simulant (B. cereus spore). Read More

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November 2018
1 Read

Remediation of cadmium, lead and zinc in contaminated soil with CETSA and MA/AA.

J Hazard Mater 2018 Dec 1;366:177-183. Epub 2018 Dec 1.

College of Environmental Sciences, Sichuan Agricultural University, Wenjiang, 611130, PR China.

Soil washing, which is used to remove heavy metals from soil, is dependent on suitable washing agents. However, there is still a lack of economical, environmentally friendly washing agents with high removal efficiency. In this study, three washing agents, carboxyalkylthiosuccinic acid (CETSA), copolymer of maleic and acrylic acid (MA/AA) and ethylenediamine tetra acetic acid (EDTA), were used to remove heavy metals from contaminated soil. Read More

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December 2018
2 Reads

Removal of per- and polyfluoroalkyl substances using super-fine powder activated carbon and ceramic membrane filtration.

J Hazard Mater 2018 Nov 15;366:160-168. Epub 2018 Nov 15.

Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St, Golden, CO 80401, USA. Electronic address:

Contamination of drinking water sources with per- and polyfluoroalkyl substances (PFASs) is a major challenge for environmental engineers. While granular activated carbon (GAC) is an effective adsorbent-based treatment technology for long-chained PFASs, GAC is less effective for removal of short-chained compounds, necessitating a more complete treatment strategy. Super-fine powder activated carbon (SPAC; particle diameter <1 um) is potentially a superior adsorbent to GAC due to high specific surface area and faster adsorption kinetics. Read More

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November 2018
1 Read

Management of slurry in Gran Canaria Island with full-scale natural treatment systems for wastewater (NTSW). One year experience in livestock farms.

J Environ Manage 2018 Dec 3;232:666-678. Epub 2018 Dec 3.

Institute for Environmental Studies and Natural Resources (i-UNAT), University of Las Palmas de Gran Canaria, Spain. Electronic address:

The aim of this work is to describe the performance of three full-scale natural treatment systems for wastewater, which operated in an integrated manner in livestock pig farms (1000-1500pigsintotal) over one year. Slurry management was performed with these natural treatment systems operating under the normal waste loading conditions of the livestock farms in which were integrated. The systems were comprised of elements such as first generation digesters, subsurface flow constructed wetlands and facultative ponds. Read More

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December 2018

A photoelectrochemical sensing strategy based on single-layer MoS modified electrode for methionine detection.

J Pharm Biomed Anal 2018 Nov 28;165:94-100. Epub 2018 Nov 28.

Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong, State Key Laboratory Base of Eco-Chemical Engineering, Key Laboratory of Rubber-Plastics of Ministry of Education/Shandong Provincial Key Laboratory of Rubber Plastics, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China. Electronic address:

MoS, a typical transition metal disulfide, is widely used in the photoelectrochemical (PEC) sensor construction. In general, MoS based PEC sensor are "signal-on" strategies. Surprisingly, we discovered that the PEC response of MoS was quenched by methionine greatly. Read More

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November 2018
1 Read

Intraventricular blood flow with a fully dynamic mitral valve model.

Comput Biol Med 2018 Nov 29;104:197-204. Epub 2018 Nov 29.

Department of Chemical Engineering, Faculty of Applied Science, Delft University of Technology, the Netherlands.

Mitral valve (MV) leaflets affect the formation, growth, and decay of vortices in the left ventricle (LV) during diastolic filling. The shape and motion of MV leaflets are simplified in most studies due to computational restrictions. In this study, we present a newly developed mathematical method to model the dynamic movement of valve leaflets and annulus, which is based on in vivo data obtained with magnetic resonance imaging (MRI). Read More

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November 2018
1 Read

Effect of a cauliflower (Brassica oleraceae var. Botrytis) leaf powder-enriched diet on performance, carcass and meat characteristics of growing rabbit.

Meat Sci 2018 Nov 19;149:134-140. Epub 2018 Nov 19.

School of Agricultural, Forestry, Food and Environmental Sciences, University of Basilicata, Viale dell'Ateneo Lucano 10, 85100 Potenza, Italy.

The aim of this study was to investigate the effect of a cauliflower leaf powder (CLP)-enriched diet on the performance, quality and antioxidative potential of rabbit meat. No significant differences were found for live performance parameters between rabbits fed with standard (SD) and CLP diet. Dietary supplementation influenced the meat traits of rabbits: CLP meat showed significantly lower drip loss after 48 h, cooking loss, and a significantly higher lightness (L*) and redness (a*) values, vitamin A and vitamin E content, and oxidative stability, compared to SD meat. Read More

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November 2018

A simple yet sensitive colorimetric nitrite ions assay based on diazotization with p‑Aminobenzoic and coupling with phloroglucinol in acidic medium.

Spectrochim Acta A Mol Biomol Spectrosc 2018 Aug 25;210:398-404. Epub 2018 Aug 25.

Key Laboratory of Bioelectrochemistry & Analysis of Gansu Province, College of Chemistry& Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China. Electronic address:

Immoderate intake of nitrite (NO) is deleterious human health and may result in causing dangerous diseases. In this study, nitrite detection system was successfully fabricated based on a unique diazo-coupling reaction of p‑Aminobenzoic acid (PABA) and phloroglucinol (1, 3, 5‑trihydroxybenzene). Upon the presence of NO in an acid medium, p‑Aminobenzoic acid could not only form diazonium ion easily but also couple with p‑Aminobenzoic acid, and results forming yellow water-soluble azo dye that shows maximum absorption at 434 nm. Read More

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Evaluation of hetero-multivalent lectin binding using a turbidity-based emulsion agglutination assay.

Colloids Surf B Biointerfaces 2018 Nov 28;175:84-90. Epub 2018 Nov 28.

Dept. of Chemical Engineering, Texas A&M University, College Station, TX, 77843, USA. Electronic address:

Lectin hetero-multivalency, binding to two or more different types of ligands, has been demonstrated to play a role in case of both LecA (a Pseudomonas aeruginosa adhesin) and Cholera Toxin subunit B (a Vibrio cholerae toxin). In order to screen the ligand candidates that involve in hetero-multivalent binding from large molecular libraries, we present a turbidity-based emulsion agglutination (TEA) assay that can be conducted in a high-throughput format using the standard laboratory instruments and reagents. The benefit of this assay is that it relies on the use of emulsions that can be formed using ultrasonication, minimizing the bottleneck of substrate surface functionalization. Read More

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November 2018

Chitosan microparticles embedded with multi-responsive poly(N-vinylcaprolactam-co-itaconic acid-co-ethylene-glycol dimethacrylate)-based hydrogel nanoparticles as a new carrier for delivery of hydrophobic drugs.

Colloids Surf B Biointerfaces 2018 Nov 22;175:73-83. Epub 2018 Nov 22.

Laboratory of Polymers, Department of Chemical Engineering, Engineering School of Lorena, University of São Paulo, EEL-USP, Estrada Municipal do Campinho, s/n, 12602-810, Lorena, SP, Brazil. Electronic address:

In this paper, chitosan was used as protective agent for dual temperature-/pH-sensitive poly(N-vinylcaprolactam-co-itaconic acid-co-ethylene- glycol dimethacrylate)- based hydrogel nanoparticles (poly(NVCL-co-IA-co-EGDMA)) aiming avoid their undesirable colloidal destabilization at different conditions of body human tissues. Thus, poly(NVCL-co-IA-co-EGDMA) was embedded into chitosan and a new solid dispersion was prepared via spray-drying and ketoprofen was used as carrier. Two different sizes of hydrogel nanoparticles (120. Read More

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November 2018
3 Reads

A perspective on biogenic synthesis of platinum nanoparticles and their biomedical applications.

Spectrochim Acta A Mol Biomol Spectrosc 2018 Nov 19;211:94-99. Epub 2018 Nov 19.

Food Chemistry and Molecular Cancer Biology Lab, Department of Animal Health and Management, Science Campus, Alagappa University, Karaikudi 630003, India. Electronic address:

In recent era, the interest on inorganic nanoparticles is augmenting due to their engrossing and uncanny properties. Among them, platinum nanoparticles (PtNPs) are highly remarkable owing to their intrinsic physicochemical and biological properties making them an effective candidate towards catalytic and biomedical applications. Nevertheless, conventional physical and chemical methodologies of PtNPs synthesis are among the most prevalent protocols to synthesize PtNPs of desired shape and size. Read More

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November 2018

Computational study of new 1,2,3-triazole derivative of lithocholic acid: Structural aspects, non-linear optical properties and molecular docking studies as potential PTP 1B enzyme inhibitor.

Comput Biol Chem 2018 Nov 22;78:144-152. Epub 2018 Nov 22.

Department of Chemistry, University of Delhi, Delhi, 110007, India. Electronic address:

We have reported synthesis of a novel 1,2,3-triazole conjugate of lithocholic acid by 1,3-dipolar cycloaddition reaction. The molecular properties such as geometry, conformations, bond lengths and dihedral angles were investigated theoretically. The bond order analysis was performed using Wiberg bond order (WBO), Fuzzy bond order (FBO) and Laplacian bond order (MBO) method. Read More

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November 2018

Genus Psoralea A review of the traditional and modern uses, phytochemistry and pharmacology.

J Ethnopharmacol 2018 Dec 3. Epub 2018 Dec 3.

CSIR-National Botanical Research Institute, Plant Transgenic Laboratory, P.O. Box 436, Rana Pratap Marg,Lucknow-226 001, U.P., India. Electronic address:

Ethnopharmacological Relevance: The genus Psoralea (Fabaceae) harbours 105 accepted species that are extensively used by local peoples and medicinal practitioners of China, India, and other countries for treatment of tooth decay, psoriasis, leucoderma, leprosy, kidney problems, tuberculosis, indigestion, constipation and impotence. Presently, pharmacological research reports are available on only few species namely Bituminaria bituminosa (Syn: P. bituminosa), P. Read More

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December 2018
3 Reads

First ethnobotanical inventory and phytochemical analysis of plant species used by indigenous people living in the Maromizaha forest, Madagascar.

J Ethnopharmacol 2018 Dec 3. Epub 2018 Dec 3.

Department of Agriculture, Forestry and Food Science, University of Torino, Torino, Italy.

Ethnopharmacological Relevance: Characterized by one of the highest rates of endemism and biodiversity in the world, Madagascar provides a wide variety of medicinal plants, that could represent a potential source of new drugs. The main aim of this study was to investigate the potential medicinal properties of the plant species used by indigenous people in Maromizaha forest and to provide the first ethnobotanical inventory of the area.

Materials And Methods: Data were collected through open semi-structured interviews with local informants, the reported plants were collected and identified to create a specimen herbarium. Read More

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December 2018
2 Reads

Engineering of pectin-dopamine nano-conjugates for carrying ruthenium complex: A potential tool for biomedical applications.

J Inorg Biochem 2018 Nov 28;191:135-142. Epub 2018 Nov 28.

Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224007, People's Republic of China. Electronic address:

In this work, we designed polysaccharide-metal complex of dopamine-modified pectin linking ruthenium compound, which exhibited a certain inhibition specificity to human renal cell adenocarcinoma cell line 786-O. The chemical structure and physical properties of the polysaccharide-metal complex were well characterized by multiple analysis methods. The multi-spectral results revealed that pectin-dopamine have been successfully coordinated by ruthenium complex to form nano-conjugates, which self-assembled into relatively regular nanospheres of approximately 200 nm. Read More

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November 2018
3 Reads

Characterization of A dextran-budesonide prodrug for inhalation therapy.

Eur J Pharm Sci 2018 Dec 3. Epub 2018 Dec 3.

Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, FL 32610, United States of America. Electronic address:

Reducing the dosing frequency of corticosteroids may increase compliance and increase pulmonary targeting. The objective of this study was to evaluate whether a high molecular weight dextran-budesonide conjugate might be suitable for pulmonary slow release of the otherwise fast absorbed budesonide. An array of dextran-spacer-budesonide conjugates was prepared that differed in the molecular weight of dextran (20 kDa or 40 kDa) and the length of the dicarboxylic spacer (succinic, glutaric, and adipic anhydride). Read More

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December 2018
1 Read

Exploring potential new galactomannan source of Retama reatam seeds for food, cosmetic and pharmaceuticals: Characterization and physical, emulsifying and antidiabetic properties.

Int J Biol Macromol 2018 Dec 3. Epub 2018 Dec 3.

Department of Industrial Engineering, University of Salerno, Via Ponte Don Melillo, 84084 Fisciano, SA, Italy.

In this study, physicochemical, interfacial and emulsifying properties of Retama reatam and guar galactomannans were comparatively investigated. The results showed that Retama reatam galactomannan is mainly composed of total carbohydrates (95.52%) and lower protein contents (0. Read More

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December 2018

The polyphenolic-polysaccharide complex of Agrimonia eupatoria L. as an indirect thrombin inhibitor - isolation and chemical characterization.

Int J Biol Macromol 2018 Dec 3. Epub 2018 Dec 3.

Department of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 29, 50-370 Wrocław, Poland; Regional Specialist Hospital in Wrocław, Research and Development Centre, Kamieńskiego 73a, 51-124 Wrocław, Poland.

The polyphenolic-polysaccharide complex was isolated from the dried aerial parts of the medicinal plant Agrimonia eupatoria L. using a multi-step process involving the degreasing of the plant material by extraction with organic solvents, followed by extraction with hot alkali, neutralization, further separation with organic solvents and dialysis. The complex was homogeneous with a molecular weight of about 55 × 10 g/mol and consisted mainly of carbohydrates and polyphenols matrix, composed of lignin-related units, with the dominance of dimethoxyphenyl structures. Read More

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December 2018

One-pot carbonization of chitosan/P123/PdCl blend hydrogel membranes to N-doped carbon supported Pd catalytic composites for Ullmann reactions.

Int J Biol Macromol 2018 Dec 3. Epub 2018 Dec 3.

Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China. Electronic address:

Novel porous nitrogen-doped carbon supported Pd (Pd@N-C) catalytic composites were prepared by one-pot thermal carbonization of chitosan/poly(ethylene glycol)‑block‑poly(propylene glycol)‑block‑poly(ethylene glycol)/PdCl (CS/P123/PdCl) blend hydrogel membranes at different temperature in N atmosphere. The porous structure of the Pd@N-C catalytic composite was governed by both the addition of P123 and the carbonization temperature. At highest carbonization temperature of 900 °C, the prepared Pd@N-C catalytic composite from CS/P123/PdCl blend membrane showed the highest specific area (S) of 293. Read More

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December 2018

Ammonium persulphate induced synthesis of polymethyl methacrylate grafted sodium alginate composite films with high strength for food packaging.

Int J Biol Macromol 2018 Dec 3. Epub 2018 Dec 3.

State Key Laboratory of Bio-Fibers and Eco-Textiles, Qingdao University, Qingdao 266071, PR China; College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, PR China. Electronic address:

The graft copolymerization of methyl methacrylate (MMA) onto alginate was carried out in aqueous media by initiators of ammonium persulphate under a nitrogen gas atmosphere. Then, the grafting of PMMA chains onto the alginate backbone was confirmed through the study of Fourier transform infrared, X-ray diffraction, scanning electron microscopy and H nuclear magnetic resonance spectroscopy. At last, a thin and transparent polymethyl methacrylate grafted alginate film with high strength was obtained by the casting method. Read More

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December 2018
1 Read

A paper sizing agent based on leather collagen hydrolysates modified by glycol diglycidyl ether and its compound performance.

Int J Biol Macromol 2018 Dec 3. Epub 2018 Dec 3.

College of Arts and Sciences, Shaanxi University of Science & Technology, Xi'an, 710021, China.

In this research, collagen hydrolysates with different average molecular weights (Mn¯) from leather collagen were chosen as raw materials. Five environmental-friendly sizing agents (SA) were prepared by cross-linking collagen hydrolysates with glycol diglycidyl ether (GDE) and further grafting them with butyl acrylate (BA) and styrene (St). Then the compound sizing agents (SGDESA-x, x = 1, 2, 3 and 4) were obtained by simple physical mixing of GDESA and starch. Read More

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December 2018
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Pilot-scale isolation and characterization of extracellular polymeric substances (EPS) from cell-free medium of Spirulina sp. LEB-18 cultures under outdoor conditions.

Int J Biol Macromol 2018 Dec 3. Epub 2018 Dec 3.

College of Pharmacy, Federal University of Bahia, Salvador, Brazil.

This objective of this work was to monitor the EPS production during the growth of Spirulina sp. LEB-18, evaluate the productivity and to characterize the exopolymers obtained on pilot-scale under outdoor conditions. The production of crude EPS occurred in all phases of biomass growth and was approximately ten folds higher than that biomass concentration of Spirulina sp. Read More

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December 2018

Dual functions of STAT3 in LPS-induced angiogenesis of hepatocellular carcinoma.

Biochim Biophys Acta Mol Cell Res 2018 Dec 3. Epub 2018 Dec 3.

Department of Biology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment and SUSTech-HKU Joint Laboratories for Matrix Biology and Diseases, Southern University of Science and Technology, Shenzhen 518055, China. Electronic address:

Hepatocellular carcinoma (HCC) is a long-term consequence of chronic inflammatory liver injury. Hepatic injury is associated with a defective intestinal barrier and increased hepatic exposure to bacterial products including lipopolysaccharide (LPS), which promotes hepatocarcinogenesis. Despite its clinical significance, the molecular mediator linking chronic inflammation with HCC development remains to be clarified. Read More

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December 2018
1 Read

Time-dependently slow-released multiple-drug eluting external sheath for efficient long-term inhibition of saphenous vein graft failure.

J Control Release 2018 Dec 3. Epub 2018 Dec 3.

Department of Cardiac Surgery, First Affiliated Hospital, China Medical University, Shenyang, PR China. Electronic address:

Coronary artery bypass graft surgery (CABG) is an effective therapeutic method for coronary artery disease. Great saphenous vein is the predominant graft due to the accessibility, sufficient length and suitable size matching with coronary artery. However, saphenous vein graft failure (SVGF) always restrict the long-term success of CABG. Read More

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December 2018

Activation of mitochondrial aldehyde dehydrogenase (ALDH2) by ALDA-1 reduces both the acquisition and maintenance of ethanol intake in rats: A dual mechanism?

Neuropharmacology 2018 Dec 3. Epub 2018 Dec 3.

Program of Molecular and Clinical Pharmacology, ICBM, Faculty of Medicine, University of Chile, Santiago, Chile.

A number of pre-clinical studies have shown that brain-generated acetaldehyde, the first metabolite of ethanol, exerts reinforcing effects that promote the acquisition of ethanol intake, while chronic intake maintenance appears to be mediated by alcohol-induced brain neuroinflammation/oxidative stress. Recently, it was described that N-(1,3-benzodioxol-5-ylmethyl)-2,6-dichlorobenzamide (ALDA-1) activates aldehyde dehydrogenase-2 (ALDH2), enzyme that catalyzes the oxidation of ethanol-derived acetaldehyde to acetate. The aim of this study was to determine the effects of ALDA-1 on both the acquisition and the maintenance of alcohol intake in alcohol-preferring UChB rats. Read More

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December 2018

A value proposition for trough level-based anti-TNFα drug dosing.

Clin Chim Acta 2018 Dec 3. Epub 2018 Dec 3.

Expert Center Clinical Chemistry Eindhoven, Eindhoven, the Netherlands; Clinical Laboratory, Máxima Medical Center, Veldhoven, the Netherlands.

Treatment of inflammatory bowel diseases and rheumatic disorders with anti-tumor necrosis factor alpha (TNFα) drugs is expensive, while a significant proportion of patients does not show adequate clinical response. Therapeutic drug monitoring (TDM) enables patient-specific anti-TNFα therapy. The role of laboratory tests in clinical care has recently been described in a value proposition framework. Read More

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December 2018
3 Reads

PEG-grafted phospholipids in vesicles: Effect of PEG chain length and concentration on mechanical properties.

Chem Phys Lipids 2018 Dec 3. Epub 2018 Dec 3.

Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India. Electronic address:

Incorporation of low molecular weight poly-ethylene glycol (PEG) - grafted phospholipids in vesicle bilayers is known to increase the circulation time of liposomal drug delivery vehicles. Mechanical properties of giant unilamellar DPPC vesicles containing varying concentrations of DSPE-PEG (PEG MW: 550, 1000 and 2000) were measured by micropipette aspiration assay or osmotic swelling. While the area compressibility modulus did not change significantly, the bending modulus and water permeability of the bilayer was found to increase with increasing mole fraction of DSPE-PEG. Read More

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December 2018

Oxidative Coupling of Carbazoles: A Substituent-Governed Regioselectivity Profile.

J Org Chem 2018 Dec 6. Epub 2018 Dec 6.

Oxidative C-C coupling of carbazoles possessing various substituents are demonstrated, in presence of organic (metal-free) recyclable oxidants, such as, DDQ or CA/H+ for accessing bicarbazole regioisomers. Differently substituted carbazoles are examined to showcase regioselectivity discrimination (3,3'- versus 1,3'-bicarbazoles), and preferences based on sterics and electronics in oxidative coupling. Finally, a mechanism that involves carbazole radical cation has been traced (evidenced) and proposed based on the UV-vis-NIR absorption and EPR spectroscopy results. Read More

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December 2018

Multi-light responsive quantum dot sensitized hybrid micromotors with dual-mode propulsion.

Angew Chem Int Ed Engl 2018 Dec 6. Epub 2018 Dec 6.

University of Alcalá, Analytical Chemistry and Chem. Ing., Ctra Madrid-Barcelona km 33,600, 28871, Alcalá de Henares, SPAIN.

CdS quantum dots/C60 tubular micromotors with chemical/multi-light-controlled propulsion and "on-the-fly" acceleration capabilities are described. "In-situ" growth of CdS quantum dots on the outer fullerene layer impart them with light-responsive properties in connection to inner Pt, Pd or MnO2 layers. This is the first time that visible-light is used to drive bubble propelled tubular micromotors. Read More

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December 2018

Association of colorectal polyps and cancer with low-dose persistent organic pollutants: A case-control study.

PLoS One 2018 6;13(12):e0208546. Epub 2018 Dec 6.

Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.

Background: Low-dose persistent organic pollutants (POPs) have recently been linked to immunosenescence, a key mechanism in carcinogenesis, as well as many aging-related chronic diseases. Since feces are the main excretion route of POPs, the large intestine is a potential target organ for these pollutants. We performed a case-control study to evaluate whether exposure to low-dose POPs is related to the risk of colorectal polyps and cancer. Read More

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December 2018

A novel approach to stabilize fetal cell-free DNA fraction in maternal blood samples for extended period of time.

PLoS One 2018 6;13(12):e0208508. Epub 2018 Dec 6.

Department of Research and Development, CFGenome Omaha NE, United States of America.

This study was undertaken to evaluate a novel method for stabilizing and preserving the original proportion of cell-free fetal DNA (cffDNA) in maternal blood for extended periods of time without using crosslinking agents, such as formaldehyde, which compromise DNA integrity and extraction efficiency. Blood was drawn from pregnant donors into K3EDTA and Blood Exo DNA ProTeck® (ProTeck) tubes. Blood drawn into both tubes were aliquoted and stored at three different temperatures. Read More

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December 2018

Modelling Toxoplasma gondii infection in a 3D cell culture system In Vitro: Comparison with infection in 2D cell monolayers.

PLoS One 2018 6;13(12):e0208558. Epub 2018 Dec 6.

Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, United States of America.

Three-dimensional (3D) cell culture models bridge the gap between two-dimensional (2D) monolayer cultures and animal models. Physiologically relevant, 3D culture models have significantly advanced basic cell science and provide unique insights into host-pathogen interactions intrinsically linked to cell morphology. Toxoplasma gondii is an obligate intravacuolar parasite that chronically infects a large portion of the global human population. Read More

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December 2018

Effects of acute exposures of 2,4,6-trinitrotoluene and inorganic lead on the fecal microbiome of the green anole (Anolis carolinensis).

PLoS One 2018 6;13(12):e0208281. Epub 2018 Dec 6.

The Environmental Laboratory, U.S. Army Engineer Research and Development Center, Vicksburg, Mississippi, United States of America.

Microbiome studies focused on ecologically relevant vertebrate models like reptiles have been limited. Because of their relatively small home range, fast maturation, and high fecundity, lizards are an excellent reptilian terrestrial indicator species. For this study we used the green anole, Anolis carolinensis, to assess the impact of military relevant contaminants on fecal microbiome composition. Read More

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December 2018

Extracellular polymeric substances (EPS) producing and oil degrading bacteria isolated from the northern Gulf of Mexico.

PLoS One 2018 6;13(12):e0208406. Epub 2018 Dec 6.

Department of Marine Biology, Texas A&M University at Galveston, Galveston, Texas, United States of America.

Sinking marine oil snow was found to be a major mechanism in the transport of spilled oil from the surface to the deep sea following the Deepwater Horizon (DwH) oil spill. Marine snow formation is primarily facilitated by extracellular polymeric substances (EPS), which are mainly composed of proteins and carbohydrates secreted by microorganisms. While numerous bacteria have been identified to degrade oil, there is a paucity of knowledge on bacteria that produce EPS in response to oil and Corexit exposure in the northern Gulf of Mexico (nGoM). Read More

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December 2018

A study for multiscale information transfer measures based on conditional mutual information.

PLoS One 2018 6;13(12):e0208423. Epub 2018 Dec 6.

Department of Mathematics, College of Science, Beijing University of Chemical Technology, Beijing, China.

As the big data science develops, efficient methods are demanded for various data analysis. Granger causality provides the prime model for quantifying causal interactions. However, this theoretic model does not meet the requirement for real-world data analysis, because real-world time series are diverse whose models are usually unknown. Read More

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December 2018
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Effect of crop residues on interception and activity of prosulfocarb, pyroxasulfone, and trifluralin.

PLoS One 2018 6;13(12):e0208274. Epub 2018 Dec 6.

School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia.

Crop residue retention on the soil surface in no-tillage system can intercept pre-emergent herbicides and reduce their efficacy. Three experiments were conducted to investigate the effect of crop residue amount (0, 1, 2 and 4 t ha-1), moisture (wet versus dry), type (wheat, barley, canola, chickpea and lupin) and age (fresh or aged for one year) on the interception and subsequent leaching of prosulfocarb, pyroxasulfone, and trifluralin from the residue into soil. Bioassays, using cucumber and annual ryegrass as indicator plants, were used to assess herbicide activity/availability in the soil and on the residue. Read More

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December 2018

ATF2 promotes urothelial cancer outgrowth via cooperation with androgen receptor signaling.

Endocr Connect 2018 Dec;7(12):1397-1408

Department of Pathology & Laboratory Medicine, University of Rochester Medical Center, Rochester, New York, USA.

We investigated the functional role of ATF2, a transcription factor normally activated via its phosphorylation in response to phospho-ERK/MAPK signals, in the outgrowth of urothelial cancer. In both neoplastic and non-neoplastic urothelial cells, the expression levels of androgen receptor (AR) correlated with those of phospho-ATF2. Dihydrotestosterone treatment in AR-positive bladder cancer cells also induced the expression of phospho-ATF2 and phospho-ERK as well as nuclear translocation and transcriptional activity of ATF2. Read More

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December 2018

Kinetically selective and potent inhibitors of HDAC8.

Biol Chem 2018 Dec 1. Epub 2018 Dec 1.

Department of Chemical Engineering and Biotechnology, University of Applied Sciences Darmstadt, 64295 Darmstadt, Germany.

HDAC8 is an established and validated target for T-cell lymphoma and childhood neuroblastoma. The active site binding pocket of HDAC8 is highly conserved among all zinccontaining representatives of the histone deacetylase family. This explains that most HDACs are unselectively recognized by similar inhibitors featuring a zinc binding group (ZBG), a hydrophobic linker and a head group. Read More

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December 2018

Titin as a force generating muscle protein under regulatory control.

J Appl Physiol (1985) 2018 Dec 6. Epub 2018 Dec 6.

Institute of Physiology II, University of Muenster, Germany.

Titin has long been recognized as a mechanical protein in muscle cells that has a main function as a molecular spring in the contractile units, the sarcomeres. Recent work suggests that the titin spring contributes to muscle contraction in a more active manner than previously thought. In this review, we highlight this property, specifically the ability of the immunoglobulin-like (Ig) domains of titin to undergo unfolding-refolding transitions when isolated titin molecules or skeletal myofibrils are held at physiological force levels. Read More

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December 2018

Building the evidence base for dengue vector control: searching for certainty in an uncertain world.

Pathog Glob Health 2018 Dec 6:1-9. Epub 2018 Dec 6.

a Heidelberg Institute of Global Health , University of Heidelberg , Germany.

This review discusses biological and chemical methods for dengue vector control, using recently emerging summary evidence, meta-analyses and systematic reviews to conclude on practical public health recommendations for Aedes control, which is increasingly relevant in an era of widespread Chikungunya, yellow feer and Zika outbreaks. The analysis follows an a priori framework of systematic reviews by the authors on vector control methods, distinguishing vector control methods into biological, chemical and environmental methods. Findings of each published systematic review by the authors, following each individual vector control method, are summarised and compared in the discussion against the findings of existing meta-analyses covering all vector control methods. Read More

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December 2018

Metal-ligand interface in the chemical reactions of ligand protected noble metal clusters.

Langmuir 2018 Dec 6. Epub 2018 Dec 6.

We discuss the role of the metal-ligand (M-L) interfaces in the chemistry of ligand protected, atomically precise noble metal clusters, a new and expanding family of nanosystems, in solution as well as in gas phase. A few possible mechanisms in which the structure and dynamics of M-L interfaces could trigger intercluster exchange reactions are presented first. How interparticle chemistry can be a potential mechanism of Ostwald ripening, a well-known particle coarsening process, is also discussed. Read More

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December 2018
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In Vitro Synthesis and Crystallization of β-1,4-Mannan.

Biomacromolecules 2018 Dec 6. Epub 2018 Dec 6.

In vitro polymerization of β-mannans is a challenging reaction due to the steric hindrance confered by the configuration of mannosyl residues and the thermodynamic instability of the β-anomer. Whatever the approach used to date - whether chemical, or enzymatic with glycosynthases and mannosyltransferases - pure β-1,4-mannans have never been synthesized in vitro. This has limited attempts to investigate their role in the production of plant and algal cell walls, in which they are highly abundant. Read More

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December 2018

A Radical Approach to Enzymatic β-Thioether Bond Formation.

J Am Chem Soc 2018 Dec 6. Epub 2018 Dec 6.

Ribosomally-synthesized and post-translationally-modified peptides (RiPPs) are an emerging class of natural products that harbor diverse chemical functionalities, usually introduced via the action of a small number of tailoring enzymes. We have been interested in RiPP biosynthetic gene clusters that encode unusual metalloenzymes, as these may install yet unknown alterations. Using a new bioinformatic search strategy, we recently identified an array of unexplored RiPP gene clusters that are quorum sensing-regulated and contain one or more uncharacterized radical S-adenosylmethionine (RaS) metalloenzymes. Read More

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December 2018
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Supramolecular Polymer Cross-Linked by Discrete Tris-[2]pseudorotaxane Metallacycles and Its Redox-Responsive Behavior.

Inorg Chem 2018 Dec 6. Epub 2018 Dec 6.

Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering , East China Normal University , Shanghai 200062 , P. R. China.

A new discrete hexagonal metallacycle M containing tris-[2]pseudorotaxane moiety has been successfully designed and synthesized via coordination-driven self-assembly. The newly designed tris-[2]pseudorotaxane metallacycle was well characterized with nuclear magnetic resonance and mass spectra analysis. Such tris-[2]pseudorotaxane metallacycle M and pillar[5]arene dimer (PD) could further form a new family of cross-linked redox-responsive supramolecular polymer M⊃(PD) through a host-guest interaction. Read More

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December 2018
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Chromatin Modifications in Toxicology.

Authors:
James J Galligan

Chem Res Toxicol 2018 Dec 6. Epub 2018 Dec 6.

Department of Pharmacology and Toxicology, College of Pharmacy , University of Arizona , Tucson , Arizona 85721 , United States.

Histone modifications regulate chromatin structure and function. Primary and secondary metabolites stemming from environmental and chemical exposures may play a critical role in the underlying epigenomic state of a cell through covalent histone modifications. Future investigations should be focused on characterizing the "Histone Code" when performing toxicogenomic analyses. Read More

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December 2018

Combinatorial Peptide Array Synthesis Based on Microfluidic Impact Printing.

ACS Comb Sci 2018 Dec 6. Epub 2018 Dec 6.

In this paper, a novel inkjet printing technique, micro impact printing (MI printing), is applied for the first time to combinatorial peptide array synthesis on amine functionalized micro disc arrays through standard Fmoc chemistry. MI printing shows great advantages in combinatorial peptide array synthesis compared with other printing techniques, including 1) a disposable cartridge; 2) a small spot size (80 μm) increases array density; 3) minimal loading volume (0.6 μL) and dead volume (<0. Read More

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December 2018

Imaging mass spectrometry analysis of flavonoids in blue viola petals and their enclosure effects on violanin during color expression.

Anal Chem 2018 Dec 6. Epub 2018 Dec 6.

The color expression of anthocyanin pigments in blue flowers is precisely controlled by the pigments' chemical and physical environmental properties such as pH, metal ions, and the presence of colorless copigments. Despite the large number of known blue flowers, the coloration mechanisms of these have rarely been resolved. Herein, we showed that the blue coloration of Viola cornuta petals is expressed via the copigmentation of various flavonol 3-O-glycosides that are localized in considerable amounts in the blue regions together with violanin, an anthocyanin. Read More

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December 2018

An update and systematic review on the treatment of primary dysmenorrhea.

JBRA Assist Reprod 2018 Dec 6. Epub 2018 Dec 6.

Nursing Research Center, Golestan University of Medical Sciences, Gorgan, IR Iran.

Objectives: Primary dysmenorrhea is a painful uterine contraction caused by endometrial laceration. Drug therapies and complementary medicine have been used to treat dysmenorrhea. The aim of this study was to investigate and offer an updated perspective on the treatments for dysmenorrhea. Read More

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December 2018
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Tripyridine-Derivatives-Derived Semiconducting Iodo-argentate/cuprate Hybrids with Excellent Visible-light Induced Photocatalytic Performance.

Chem Asian J 2018 Dec 6. Epub 2018 Dec 6.

Qingdao University, College of Chemistry and Chemical Engiineering, 308 Ningxia Road, 266071, Qingdao, CHINA.

Through regulating the pH values, a series of iodo-argentate/cuprate hybrids, [Me3(4-TPT)]4[Ag6I18] (1, Me3(4-TPT) = N,N',N''-trimethyl-2,4,6-tris(4-pyridyl)-1,3,5-triazine), [Me3(4-TPT)][M5I8] (M=Ag/2, Cu/2a), [Me3(3-TPT)][M5I8] (Me3(3-TPT) = N,N',N''-trimethyl-2,4,6-tris(3-pyridyl)-1,3,5-triazine, M=Ag/3, Cu/4), exhibit adjustable structural variations with different dimensional structures, have been obtained under solvothermal conditions. They are directed by two types of in situ N-alkylation TPT-derivatives (Me3(4-TPT) for 1/2/2a and Me3(3-TPT) for 3/4) and represent the isolated units (1), 1-D polymeric chain (4), 2-D layered structures (2/2a, 3) based on diverse metal iodide clusters. These compounds possess reducing band gaps comparing with the bulk β-AgI and CuI and belong to potential semiconductor materials. Read More

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December 2018
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