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https://www.readbyqxmd.com/read/29222847/synthesis-of-novel-norsufentanil-analogues-via-a-four-component-ugi-reaction-and-in-vivo-docking-and-qsar-studies-of-their-analgesic-activity
#1
Majid Nami, Peyman Salehi, Minoo Dabiri, Morteza Bararjanian, Sajjad Gharaghani, Mona Khoramjouy, Ahmed Al-Harrasi, Mehrdad Faizi
Novel substituted amino acid tethered norsufentanil derivatives were synthesized by the four-component Ugi reaction. Norsufentanil was reacted with succinic anhydride to produce the corresponding carboxylic acid. The resulting carboxylic acid has undergone a multicomponent reaction with different aldehydes, amines, and isocyanides to produce a library of the desired compounds. In all cases, amide bond rotation was observed in the NMR spectra. In vivo analgesic activity of the synthesized compounds was evaluated by a tail flick test...
December 8, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/29222329/glutaminolysis-is-required-for-tgf-%C3%AE-1-induced-myofibroblast-differentiation-and-activation
#2
Karen Bernard, Naomi J Logsdon, Gloria A Benavides, Yan Sanders, Jianhua Zhang, Victor M Darley-Usmar, Victor J Thannickal
Myofibroblasts participate in physiological wound healing and pathological fibrosis.  Myofibroblast differentiation is characterized by the expression of alpha-smooth muscle actin (α-SMA) and extracellular matrix (ECM) proteins, and is dependent on metabolic reprogramming.  In this study, we explored the role of glutaminolysis and metabolites of the tricarboxylic acid cycle (TCA) in supporting myofibroblast differentiation.  Glutaminolysis converts glutamine (Gln) into alpha-ketoglutarate (α-KG), a critical intermediate in the TCA cycle...
December 8, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29220803/a-single-cell-analysis-platform-for-electrochemiluminescent-detection-of-platelets-adhesion-to-endothelial-cells-based-on-au-dl-zncqds-nanoprobes
#3
Dongping Long, Yunfei Shang, Youyi Qiu, Bin Zhou, Peihui Yang
A novel single-cell analysis platform (SCA) was developed for the investigation of platelets adhesion to single human umbilical vein endothelial cell (HUVEC) via using the adhesion molecule (E-selectin) on the damaged HUVEC as the marker site, and integrating electrochemiluminescence (ECL) with the ultrasensitive Au@DL-ZnCQDs nanoprobes. The Au@DL-ZnCQDs nanocomposite, a kind of double layer zinc-coadsorbed carbon quantum dot (ZnCQDs) core-shell nanoprobe, was firstly constructed by using gold nanoparticles (AuNPs) as the core to load with ZnCQDs and then the citrate-modified silver nanoparticles (AgNPs) as the bridge to link AuNPs-ZnCQDs with ZnCQDs to form the core-shell with double layer ZnCQDs (DL-ZnCQDs) nanoprobe, revealed a 10-fold signal amplification...
November 22, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29220759/polymer-inclusion-membrane-to-access-zn-speciation-comparison-with-root-uptake
#4
Ruben Vera, Clàudia Fontàs, Josep Galceran, Olga Serra, Enriqueta Anticó
Metal speciation studies can be performed with a new technique based on a functionalized membrane. The estimation of not only the total amount of metal, but also the metal available to living organisms is very important. In this context, we have investigated the use of a polymer inclusion membrane (PIM) in a new tool for the determination of free metal ion concentration. In order to check the usefulness of PIM devices in metal speciation studies and metal availability to potato plants (Solanum tuberosum), Zn has been chosen as a case study...
December 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29220364/an-attempt-to-interpret-a-biochemical-mechanism-of-c4-photosynthetic-thermo-tolerance-under-sudden-heat-shock-on-detached-leaf-in-elevated-co2-grown-maize
#5
Mingnan Qu, James A Bunce, Richard C Sicher, Xiaocen Zhu, Bo Gao, Genyun Chen
Detached leaves at top canopy structures always experience higher solar irradiance and leaf temperature under natural conditions. The ability of tolerance to high temperature represents thermotolerance potential of whole-plants, but was less of concern. In this study, we used a heat-tolerant (B76) and a heat-susceptible (B106) maize inbred line to assess the possible mitigation of sudden heat shock (SHS) effects on photosynthesis (PN) and C4 assimilation pathway by elevated [CO2]. Two maize lines were grown in field-based open top chambers (OTCs) at ambient and elevated (+180 ppm) [CO2]...
2017: PloS One
https://www.readbyqxmd.com/read/29220362/optimized-plasma-preparation-is-essential-to-monitor-platelet-stored-molecules-in-humans
#6
Marion Mussbacher, Waltraud C Schrottmaier, Manuel Salzmann, Christine Brostjan, Johannes A Schmid, Patrick Starlinger, Alice Assinger
Platelets store a plethora of different molecules within their granules, modulating numerous pathways, not only in coagulation, but also in angiogenesis, wound healing, and inflammatory diseases. These molecules get rapidly released upon activation and therefore represent an easily accessible indirect marker for platelet activation. Accurate analysis of platelet-derived molecules in the plasma requires appropriate anticoagulation to avoid in vitro activation and subsequent degranulation of platelets, potentially causing artificially high levels and masking biologically relevant differences within translational research studies...
2017: PloS One
https://www.readbyqxmd.com/read/29215677/diabetic-rats-present-high-mean-platelet-count-in-the-presence-of-oral-infections
#7
Luciana Louzada Ferreira, João Eduardo Gomes, Dóris Hissako Sumida, Suely Regina Mogami Bonfim, Gustavo Sivieri-Araújo, Gustav Guimarães, Luciano Tavares Angelo Cintra
Platelet count is associated with inflammatory diseases like diabetes mellitus (DM), which in turn, is related in a bidirectional manner with apical periodontitis and periodontal disease. The aim of this study was to evaluate the effects of apical periodontitis and/or periodontal disease on mean platelet count in a rat model of diabetes mellitus. Eighty Wistar rats were randomly divided into 8 groups (n=10): control (C), apical periodontitis (AP), periodontal disease (PD), apical periodontitis with periodontal disease (AP-PD), diabetes mellitus (DM), diabetes mellitus with apical periodontitis (DM-AP), diabetes mellitus with periodontal disease (DM-PD) and diabetes mellitus with apical periodontitis and periodontal disease (DM-AP-PD)...
September 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29215516/clomiphene-stair-step-protocol-for-women-with-polycystic-ovary-syndrome
#8
Tiffanny Jones, Jacqueline R Ho, Marc Gualtieri, Janet Bruno-Gaston, Karine Chung, Richard J Paulson, Kristin A Bendikson
OBJECTIVE: To compare time to ovulation, ovulation rates, and side effect profile of traditional and the stair-step protocol for ovulation induction using clomiphene citrate in women with polycystic ovary syndrome (PCOS). METHODS: We performed a retrospective study of women seeking care for infertility with a diagnosis of PCOS at a university-based infertility clinic from July 2012 to July 2014. We included patients who were resistant to the initial starting dose of 50 mg clomiphene...
December 4, 2017: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29215194/citrate-low-ph-and-amino-acid-limitation-induce-citrate-utilization-in-lactococcus-lactis-biovar-diacetylactis
#9
Oscar van Mastrigt, Emma E Mager, Casper Jamin, Tjakko Abee, Eddy J Smid
In Lactococcus lactis subsp. lactis biovar diacetylactis, citrate transport is facilitated by the plasmid-encoded citrate permease (CitP). In this work, we analysed regulation of citrate utilization by pH, nutrient limitation and the presence of citrate at four different levels: (i) plasmid copy number, (ii) citP transcription, (iii) citP mRNA processing and (iv) citrate utilization capacity. Citrate was supplied as cosubstrate together with lactose. The citP gene is known to be induced in cells grown at low pH...
December 7, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/29214504/postmarketing-experience-with-neutrolin%C3%A2-taurolidine-heparin-calcium-citrate-catheter-lock-solution-in-hemodialysis-patients
#10
Bruce E Reidenberg, Christoph Wanner, Bruce Polsky, Mariana Castanheira, Alla Shelip, Dirk Stalleicken, Antony E Pfaffle
Catheter-related bloodstream infections (CRBSI) are major complications for patients with life-threatening conditions requiring chronic vascular catheterization. The wide range of etiologic microbes and the ongoing development of resistance to antimicrobials with specific mechanisms of action make this an appropriate target for applying a nonspecific antimicrobial therapeutic. Taurolidine hydrolyzes into two antimicrobial moieties, formaldehyde and methylene glycol, which react with microbial surfaces. Neutrolin® (taurolidine, heparin, calcium citrate) was recently introduced in Germany as an antimicrobial catheter lock solution...
December 6, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29214127/in-situ-synthesis-of-silver-nanoparticles-on-the-surface-of-pdms-with-high-antibacterial-activity-and-biosafety-toward-an-implantable-medical-device
#11
Joong Hyun Kim, HyeungWoo Park, Soo Won Seo
We developed a straightforward method to fabricate antibacterial silicon films via the in situ synthesis of silver nanoparticles (AgNPs) on a polydimethylsiloxane (PDMS) film. To grow AgNPs attached on the film, AgNP seeds were synthesized through the reduction of silver ions electrostatically bound to hydroxyl groups formed on the surface of the film after treatment with air plasma. In the growth reaction, silver ions were reduced on the seeds of AgNPs by sodium citrate in a solution of AgNO3, which allowed for the formation of AgNPs with sizes of up to ~ 500 nm, which The formed AgNPs on the films were characterized using UV-vis spectrophotometer, scattering electron microscope and induced coupled mass spectrometer...
2017: Nano Convergence
https://www.readbyqxmd.com/read/29213186/cyclic-fractionation-process-for-saccharina-latissima-using-aqueous-chelator-and-ion-exchange-resin
#12
Martin Sterner, Mauricio Sodré Ribeiro, Fredrik Gröndahl, Ulrica Edlund
A new approach to process Saccharina latissima algal biomass was developed using sodium citrate and a polyvalent cation-specific resin to sequentially extract the alginate into several usable fractions. The fractionation was performed in a cyclic manner, utilizing a stepwise removal of the native polyvalent ions present in the algae to isolate fractions of alginate with different solubility in the presence of these ions. Sodium citrate was used in different concentrations in the extraction solution to remove polyvalent cations to adjust the alginate liberation while AMBERLITE IRC718 resin was added to further remove these ions and regenerate the extraction solution...
2017: Journal of Applied Phycology
https://www.readbyqxmd.com/read/29212609/effect-of-combined-exercise-versus-aerobic-only-training-on-skeletal-muscle-lipid-metabolism-in-a-rodent-model-of-type1-diabetes
#13
Michelle S Dotzert, Matthew W McDonald, Michael R Murray, J Zachary Nickels, Earl G Noble, C W James Melling
OBJECTIVES: Abnormal skeletal muscle lipid metabolism is associated with insulin resistance in people with type 1 diabetes. Although lipid metabolism is restored with aerobic exercise training, the risk for postexercise hypoglycemia is increased with this modality. Integrating resistance and aerobic exercise is associated with reduced hypoglycemic risk; however, the effects of this exercise modality on lipid metabolism and insulin resistance remain unknown. We compared the effects of combined (aerobic + resistance) versus aerobic exercise training on oxidative capacity and muscle lipid metabolism in a rat model of type 1 diabetes...
December 4, 2017: Canadian Journal of Diabetes
https://www.readbyqxmd.com/read/29212325/chronic-heat-stress-impairs-meat-quality-of-breast-muscle-in-broilers-through-affecting-redox-status-and-energy-substances-metabolism
#14
Zhuang Lu, Xiaofang He, Bingbing Ma, Lin Zhang, Jiaolong Li, Yun Jiang, Guanghong Zhou, Feng Gao
We investigated the molecular mechanisms of chronic heat stress impairing broilers breast meat quality. Broilers were assigned to three groups including normal control (NC) group, heat stress (HS) group and pair-fed (PF) group. After 7d of heat exposure (32°C), high temperature caused oxidative stress, and elevated the activity of citrate synthase (CS), mRNA expression of M-CPT1, and phosphorylation level of AMPKα, and reduced the mRNA expression of avUCP. After 14d of heat exposure, heat stress increased lightness and drip loss and decreased pH and shear force of breast meat...
December 7, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29211964/metabolic-costs-of-exposure-to-wastewater-effluent-lead-to-compensatory-adjustments-in-respiratory-physiology-in-bluegill-sunfish
#15
Sherry Du, Erin S McCallum, Maryam Vaseghi-Shanjani, Jasmine A Choi, Theresa R Warriner, Sigal Balshine, Graham R Scott
Municipal wastewater effluent is a major source of aquatic pollution and has potential to impact cellular energy metabolism. However, it is poorly understood whether wastewater exposure impacts whole-animal metabolism and whether this can be accommodated with adjustments in respiratory physiology. We caged bluegill sunfish (Lepomis macrochirus) for 21 days at two sites downstream (either 50 m or 830 m) from a wastewater treatment plant (WWTP). Survival was reduced in fish caged at both downstream sites compared to an uncontaminated reference site...
December 6, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29211866/association-of-urinary-citrate-with-acid-base-status-bone-resorption-and-calcium-excretion-in-older-men-and-women
#16
M Kyla Shea, Bess Dawson-Hughes
Context: Elevated urine net acid excretion (NAE), indicative of subclinical metabolic acidosis, has been associated with higher bone turnover. While NAE is the gold-standard clinical measure of acid-base status, it is impractical to measure in most clinical/research settings. Urine citrate, which is commonly measured, changes in response to acid-base status, but its association with bone turnover is uncertain. Objective: To evaluate the association between change in urine citrate and change in bone turnover and calcium excretion...
December 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29210997/tempol-supplementation-restores-diaphragm-force-and-metabolic-enzyme-activities-in-mdx-mice
#17
David P Burns, Izza Ali, Clement Rieux, James Healy, Greg Jasionek, Ken D O'Halloran
Duchenne muscular dystrophy (DMD) is characterized by striated muscle weakness, cardiomyopathy, and respiratory failure. Since oxidative stress is recognized as a secondary pathology in DMD, the efficacy of antioxidant intervention, using the superoxide scavenger tempol, was examined on functional and biochemical status of dystrophin-deficient diaphragm muscle. Diaphragm muscle function was assessed, ex vivo, in adult male wild-type and dystrophin-deficient mdx mice, with and without a 14-day antioxidant intervention...
December 6, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29209155/optimization-of-quantitative-proteomic-analysis-of-clots-generated-from-plasma-of-patients-with-venous-thromboembolism
#18
Aneta Stachowicz, Jakub Siudut, Maciej Suski, Rafał Olszanecki, Ryszard Korbut, Anetta Undas, Jacek R Wiśniewski
Background: It is well known that fibrin network binds a large variety of proteins, including inhibitors and activators of fibrinolysis, which may affect clot properties, such as stability and susceptibility to fibrinolysis. Specific plasma clot composition differs between individuals and may change in disease states. However, the plasma clot proteome has not yet been in-depth analyzed, mainly due to technical difficulty related to the presence of a highly abundant protein-fibrinogen and fibrin that forms a plasma clot...
2017: Clinical Proteomics
https://www.readbyqxmd.com/read/29208641/alternative-oxidase-isoforms-are-differentially-activated-by-tricarboxylic-acid-cycle-intermediates
#19
Jennifer Selinski, Andreas Hartmann, Gabriele Deckers-Hebestreit, David A Day, James Whelan, Renate Scheibe
The cyanide-insensitive alternative oxidase (AOX) is a non-proton-pumping ubiquinol oxidase that catalyzes the reduction of oxygen to water and is post-translationally regulated by redox mechanisms and 2-oxo acids. Arabidopsis thaliana possesses five AOX isoforms (AOX1A-D and AOX2). AOX1D expression is increased in aox1a knock-out mutants from A. thaliana (especially after restriction of the cytochrome c pathway), but cannot compensate for the lack of AOX1A, suggesting a difference in regulation of these isoforms...
December 5, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29207610/integration-of-micrornaome-proteomics-and-metabolomics-to-analyze-arsenic-induced-malignant-cell-transformation
#20
Youyou Zhou, Yanfu Wang, Juan Su, Zheng Wu, Chao Wang, Weiming Zhong, Xiaomei Liu, Linhui Cui, Xiaoyu Zhou, Yufang Ma, Yi Xin, Jianglin Zhang, Lisha Wu, Xing Hu, Xiang Chen, Cong Peng, MingYang Gao
Long-term exposure to arsenic has been linked to tumorigenesis in different organs and tissues, such as skin; however, the detailed mechanism remains unclear. In this present study, we integrated "omics" including microRNAome, proteomics and metabolomics to investigate the potential molecular mechanisms. Compared with non-malignant human keratinocytes (HaCaT), twenty-six miRNAs were significantly altered in arsenic-induced transformed cells. Among these miRNAs, the differential expression of six miRNAs was confirmed using Q-RT-PCR, representing potential oxidative stress genes...
October 31, 2017: Oncotarget
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