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https://www.readbyqxmd.com/read/28432941/validation-of-a-spe-hplc-uv-method-for-the-quantification-of-a-new-er-specific-photosensitizer-or-141-in-blood-serum-using-total-error-concept
#1
Emilie Bony, Yohan Mace, Adán Pinto, David Delvaux, Robert Kiss, Olivier Riant, Olivier Feron, Joëlle Quetin-Leclercq
The aim of this work is to develop the first validated HPLC-UV method quantification in blood serum for a new endoplasmic reticulum (ER)-specific benzophenazine photosensitizer (OR-141). A fast solid phase extraction (SPE) cleaning sample procedure was achieved on C18 encapped (ec) SPE cartridges and the separation was performed on a RP-18e column (5μM) using an isocratic elution with methanol. The method has been fully validated according to accuracy profiles based on total error and tolerance intervals. Calibration was performed in the matrix and trueness (<4...
April 13, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28432922/restricted-access-magnetic-core-mesoporous-shell-microspheres-with-c8-modified-interior-pore-walls-for-the-identification-of-20-s-protopanaxadiol-metabolites-in-rat-plasma-using-uplc-q-tof-ms-ms
#2
Jin Ling, Yingjia Yu, Jianan Feng, Changjiang Xu, Jiebing Jiang, Liping Wang, Jiakun Long, Yan Li, Gengli Duan
In the present study, a novel sample preparation method based on magnetic core-mesoporous shell microspheres with C8-modified interior pore walls (C8-Fe3O4@mSiO2) was established for the identification of 20(S)-protopanaxadiol (PPD) metabolites in rat plasma by UPLC-Q-TOF-MS/MS analysis. C8-Fe3O4@mSiO2 allowed selective extraction of PPD metabolites from rat plasma by excluding macromolecules in the plasma owing to size exclusion effect. Five extraction conditions including the amount of C8-Fe3O4@mSiO2 microspheres used, extraction time, elution solvents, elution volume, and elution time were investigated and optimized...
April 3, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28432906/hydrophobic-and-hydrophilic-properties-of-pollutants-as-a-factor-influencing-their-redistribution-during-snowpack-melt
#3
Krystyna Kozioł, Katarzyna Kozak, Żaneta Polkowska
Glaciers accumulate organic pollutants delivered by snow. However, our understanding of the exact dynamics of organic pollutants in the snowpack relies primarily on laboratory experiments and mathematical models. To fill the gap related to the detailed field data, we have conducted observations of melting snow profiles in two locations and three different stages of melting on one High Arctic glacier, as well as in superimposed ice. We monitored the chemical concentrations of formaldehyde, phenols, short-chain carboxylic acids, polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) and snow water equivalents to derive chemical loads...
April 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28431184/congener-specific-disposition-of-chiral-polychlorinated-biphenyls-in-lactating-mice-and-their-offspring-implications-for-pcb-developmental-neurotoxicity
#4
Izabela Kania-Korwel, Tracy Lukasiewicz, Christopher D Barnhart, Marianna Stamou, Haeun Chung, Kevin M Kelly, Stelvio Bandiera, Pamela J Lein, Hans-Joachim Lehmler
Chiral polychlorinated biphenyl (PCB) congeners have been implicated by laboratory and epidemiological studies in PCB developmental neurotoxicity. These congeners are metabolized by cytochrome P450 (P450) enzymes to potentially neurotoxic hydroxylated metabolites (OH-PCBs). The present study explores the enantioselective disposition and toxicity of two environmentally relevant, neurotoxic PCB congeners and their OH-PCB metabolites in lactating mice and their offspring following dietary exposure of the dam. Female C57BL/6N mice (8 weeks old) were fed daily, beginning two weeks prior to conception and continuing throughout gestation and lactation, with 3...
April 14, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28430908/late-thrombotic-events-after-bioresorbable-scaffold-implantation-a-systematic-review-and-meta-analysis-of-randomized-clinical-trials
#5
Carlos Collet, Taku Asano, Yosuke Miyazaki, Erhan Tenekecioglu, Yuki Katagiri, Yohei Sotomi, Rafael Cavalcante, Robbert J de Winter, Takeshi Kimura, Runlin Gao, Serban Puricel, Stéphane Cook, Davide Capodanno, Yoshinobu Onuma, Patrick W Serruys
Aims: To compare the long-term safety and efficacy of bioresorbable vascular scaffold (BVS) with everolimus-eluting stent (EES) after percutaneous coronary interventions. Methods and Results: A systematic review and meta-analysis of randomized clinical trials comparing clinical outcomes of patients treated with BVS and EES with at least 24 months follow-up was performed. Adjusted random-effect model by the Knapp-Hartung method was used to compute odds ratios (OR) and 95% confidence intervals (CI)...
April 18, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28428153/development-of-polyol-responsive-antibody-mimetics-for-single-step-protein-purification
#6
Richard J Suderman, Daren A Rice, Shane D Gibson, Eric J Strick, David M Chao
The purification of functional proteins is a critical pre-requisite for many experimental assays. Immunoaffinity chromatography, one of the fastest and most efficient purification procedures available, is often limited by elution conditions that disrupt structure and destroy enzymatic activity. To address this limitation, we developed polyol-responsive antibody mimetics, termed nanoCLAMPs, based on a 16 kDa carbohydrate binding module domain from Clostridium perfringens hyaluronidase. nanoCLAMPs bind targets with nanomolar affinity and high selectivity yet release their targets when exposed to a neutral polyol-containing buffer, a composition others have shown to preserve quaternary structure and enzymatic activity...
April 17, 2017: Protein Expression and Purification
https://www.readbyqxmd.com/read/28427734/comparison-of-outcomes-and-prognosis-of-patients-with-versus-without-newly-diagnosed-diabetes-mellitus-after-primary-percutaneous-coronary-intervention-for-st-elevation-myocardial-infarction-the-horizons-ami-study
#7
Konstanze Ertelt, Sorin J Brener, Roxana Mehran, Ori Ben-Yehuda, Thomas McAndrew, Gregg W Stone
A history of diabetes mellitus (DM) is an independent predictor for adverse events in patients with acute ST-segment elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention. Outcomes of patients with STEMI and newly diagnosed DM (NDM) are less well described. We used the Harmonizing Outcomes with Revascularization and Stents in Acute Myocardial Infarction (HORIZONS-AMI) trial database to identify the outcomes at 30 days and 3 years according to no, known, and NDM in patients with STEMI...
March 29, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28427685/fe3o4-hydroxyapatite-graphene-quantum-dots-as-a-novel-nano-sorbent-for-preconcentration-of-copper-residue-in-thai-food-ingredients-optimization-of-ultrasound-assisted-magnetic-solid-phase-extraction
#8
Phitchan Sricharoen, Nunticha Limchoowong, Yonrapach Areerob, Prawit Nuengmatcha, Suchila Techawongstien, Saksit Chanthai
Fe3O4/hydroxyapatite/graphene quantum dots (Fe3O4/HAP/GQDs) nanocomposite was synthesized and used as a novel magnetic adsorbent. This nanocomposite was characterized using scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, and magnetization property. The Fe3O4/HAP/GQDs was applied to pre-concentrate copper residues in Thai food ingredients (so-called "Tom Yum Kung") prior to determination by inductively coupled plasma-atomic emission spectrometry...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28427595/vasomotor-response-to-nitroglycerine-over-5-years-follow-up-after-everolimus-eluting-bioresorbable-scaffold-implantation
#9
Dariusz Dudek, Łukasz Rzeszutko, Yoshinobu Onuma, Yohei Sotomi, Rafał Depukat, Susan Veldhof, Divine Ediebah, Peter Staehr, Wojciech Zasada, Krzysztof P Malinowski, Grzegorz L Kaluza, Patrick W Serruys
OBJECTIVES: This study investigated the vasomotor response to nitroglycerine (NTG) up to 5 years after ABSORB implantation. BACKGROUND: There are no data regarding long-term vasomotor response after everolimus-eluting bioresorbable vascular scaffold ABSORB implantation. METHODS: We performed quantitative coronary angiography of the scaffolded and proximal and distal adjacent segments of patients from ABSORB Cohort B study before and after 200 μg of intracoronary NTG at 2, 3, and 5 years of follow-up...
April 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28427594/the-bioresorbable-drug-eluting-coronary%C3%A2-stent-the-price-is-right
#10
EDITORIAL
Michael A Kutcher
No abstract text is available yet for this article.
April 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28427593/economic-outcomes-of-bioresorbable%C3%A2-vascular-scaffolds-versus%C3%A2-everolimus-eluting-stents-in-patients%C3%A2-undergoing-percutaneous-coronary-intervention-1-year-results-from-the-absorb%C3%A2-iii-trial
#11
Suzanne J Baron, Yang Lei, Khaja Chinnakondepalli, Katherine Vilain, Elizabeth A Magnuson, Dean J Kereiakes, Stephen G Ellis, Gregg W Stone, David J Cohen
OBJECTIVES: The purpose of this study was to evaluate the economic impact of the Absorb bioresorbable vascular scaffold compared with the Xience everolimus-eluting stent in patients undergoing percutaneous coronary intervention. BACKGROUND: The ABSORB III trial (Everolimus-Eluting Bioresorbable Scaffolds for Coronary Artery Disease) demonstrated that the Absorb scaffold was noninferior to the Xience stent with respect to target lesion failure at 1 year. Whether health care costs differ between the Absorb scaffold and the Xience stent is unknown...
April 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28427580/quality-of-life-after-surgery-or-des-in-patients-with-3-vessel-or-left-main-disease
#12
Mouin S Abdallah, Kaijun Wang, Elizabeth A Magnuson, Ruben L Osnabrugge, A Pieter Kappetein, Marie-Claude Morice, Friedrich A Mohr, Patrick W Serruys, David J Cohen
BACKGROUND: In the SYNTAX (Synergy Between Percutaneous Coronary Intervention With Taxus and Cardiac Surgery) trial, patients with 3-vessel or left main coronary artery disease (CAD) had improved long-term outcomes with coronary artery bypass graft (CABG) surgery compared with percutaneous coronary intervention (PCI) with drug-eluting stents (DES), improvements driven mainly by differences in myocardial infarction and repeat revascularization. OBJECTIVES: This study compared the long-term quality-of-life benefits of DES-PCI versus CABG for patients with 3-vessel or left main CAD...
April 25, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28427576/bleeding-related-deaths-in-relation-to-the-duration-of-dual-antiplatelet-therapy-after-coronary-stenting
#13
Tullio Palmerini, Letizia Bacchi Reggiani, Diego Della Riva, Mattia Romanello, Fausto Feres, Alexandre Abizaid, Martine Gilard, Marie-Claude Morice, Marco Valgimigli, Myeong-Ki Hong, Byeong-Keuk Kim, Yangsoo Jang, Hyo-Soo Kim, Kyung Woo Park, Antonio Colombo, Alaide Chieffo, Jung-Min Ahn, Seung-Jung Park, Stefanie Schüpke, Adnan Kastrati, Gilles Montalescot, Philippe Gabriel Steg, Abdourahmane Diallo, Eric Vicaut, Gerard Helft, Giuseppe Biondi-Zoccai, Bo Xu, Yaling Han, Philippe Genereux, Deepak L Bhatt, Gregg W Stone
BACKGROUND: Although some randomized controlled trials (RCTs) and meta-analyses have suggested that prolonged dual-antiplatelet therapy (DAPT) may be associated with increased mortality, the mechanistic underpinnings of this association remain unclear. OBJECTIVES: The aim of this study was to analyze the associations among bleeding, mortality, and DAPT duration after drug-eluting stent implantation in a meta-analysis of RCTs. METHODS: RCTs comparing different DAPT durations after drug-eluting stent placement were sought through the MEDLINE, Embase, and Cochrane databases and the proceedings of international meetings...
April 25, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28427392/percutaneous-intervention-versus-coronary-artery-bypass-graft-surgery-in-left-main-coronary-artery-stenosis-a-systematic-review-and-meta-analysis
#14
Xin-Lin Zhang, Qing-Qing Zhu, Jing-Jing Yang, Yu-Han Chen, Yang Li, Su-Hui Zhu, Jun Xie, Lian Wang, Li-Na Kang, Biao Xu
BACKGROUND: The optimal revascularization technique in patients with left main coronary artery disease (CAD) remains controversial. We aimed to compare the long-term performance of percutaneous coronary intervention (PCI) versus coronary artery bypass graft (CABG) surgery in treatment of left main CAD. METHODS: PubMed, EMBASE, and the Cochrane Library were searched until November 16, 2016. RESULTS: Six randomized controlled trials and 22 matched observational studies including 22,487 patients and 90,167 patient-years of follow-up were included...
April 21, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28427006/regeneration-of-pilot-scale-ion-exchange-columns-for-hexavalent-chromium-removal
#15
Julie A Korak, Richard Huggins, Miguel Arias-Paic
Due to stricter regulations, some drinking water utilities must implement additional treatment processes to meet potable water standards for hexavalent chromium (Cr(VI)), such as the California limit of 10 μg/L. Strong base anion exchange is effective for Cr(VI) removal, but efficient resin regeneration and waste minimization are important for operational, economic and environmental considerations. This study compared multiple regeneration methods on pilot-scale columns on the basis of regeneration efficiency, waste production and salt usage...
March 9, 2017: Water Research
https://www.readbyqxmd.com/read/28426177/an-efficient-cleanup-method-coupled-with-gas-chromatography-and-mass-spectrometry-for-multi-pesticides-residue-analysis-in-complex-plant-matrices
#16
Xinquan Wang, Peipei Qi, Xiangyun Wang, Qian Zhang, Zhiwei Wang, Xiahong Xu, Hao Xu, Hu Zhang, Qiang Wang
We aimed to develop an efficient cleanup method for multi-pesticides residue analysis in complex plant matrices, shallot, ginger, garlic, onion, leek and celery. Column chromatography was used as the cleanup method and fabricated with florisil and graphitized carbon black as the adsorbents. The amount of the graphitized carbon black adsorbent and the choice of the elution solvent were systematically investigated for exploring the best combination. The target pesticides covered organochlorine, pyrethroid and organophosphorus pesticides, and were 38 in total...
April 20, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28425393/magnetic-graphene-oxide-as-an-efficient-adsorbent-for-the-separation-and-preconcentration-of-cu-ii-pb-ii-and-cd-ii-from-environmental-samples
#17
Mustafa Soylak, Demet Acar, Erkan Yilmaz, Sherif A El-Khodary, Mohamed Morsy, Medhat Ibrahim
The separation and preconcentration of copper(II), lead(II), and cadmium(II) ions on magnetic graphene oxide (MGO) by solid-phase extraction was carried out. Quantitative recovery was obtained by adsorption of analytes on MGO at pH 6 and elution of 3 M HNO3 in 10% acetone. To optimize the presented method, the effects of various parameters-including pH, eluent conditions, and vortex time-were examined. Matrix effects were also investigated. Mean recoveries of the analytes were between 95 and 105%. The proposed method was validated by applying it to certified reference materials...
April 20, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28424434/high-dose-bolus-tirofiban-versus-low-dose-bolus-in-patients-with-acute-coronary-syndrome-undergoing-percutaneous-coronary-intervention
#18
Taner Ulus, Utku Şenol, Senan Tahmazov, Kemal Iskenderov, Fezan Mutlu, Yüksel Çavuşoğlu
OBJECTIVE: Aim of the present study was to determine effects of high-dose versus low-dose intravenous (IV) bolus tirofiban on angiographic measures, ST resolution, enzymatic infarct size, and clinical outcomes in patients with acute coronary syndrome (ACS) who were undergoing percutaneous coronary intervention (PCI) and received current pharmacoinvasive therapy. METHODS: Acute coronary syndrome patients (n=271, 85.6% male; mean age: 57.9±12.6 years) from between 2009 and 2015 who received IV tirofiban therapy following PCI were retrospectively analyzed...
March 2017: Türk Kardiyoloji Derneği Arşivi: Türk Kardiyoloji Derneğinin Yayın Organıdır
https://www.readbyqxmd.com/read/28424222/randomized-comparison-of-paclitaxel-eluting-balloon-angioplasty-plus-stenting-versus-standard-balloon-angioplasty-plus-stenting-versus-directional-atherectomy-for-symptomatic-femoral-artery-disease-isar-stath
#19
Ilka Ott, Salvatore Cassese, Philipp Groha, Birgit Steppich, Martin Hadamitzky, Tareq Ibrahim, Sebastian Kufner, Karl Dewitz, Regina V Hiendlmayer, Karl-Ludwig Laugwitz, Heribert Schunkert, Adnan Kastrati, Massimiliano Fusaro
Background -Atherosclerosis in the superficial femoral artery (SFA) is common in patients suffering from peripheral artery disease. Paclitaxel-eluting balloon (PEB) angioplasty, stenting and directional atherectomy (DA) have provided new options for the treatment of SFA disease, however the comparative efficacy remains uncertain. Methods -One hundred and fifty five patients with symptomatic peripheral artery disease with de novo SFA stenotic or occlusive lesions were randomized to treatment with plain balloon angioplasty (BA) followed by PEB angioplasty and stenting (n=48), BA followed by stenting (n=52) or directional DA with distal protection and bailout stenting (n=55)...
April 19, 2017: Circulation
https://www.readbyqxmd.com/read/28423915/isolation-of-flavonoids-from-apple-peel-using-novel-graphene-oxide-cotton-fiber
#20
Z Xu, R Peng, X Chen, R Ghosh, H P V Rupasinghe
A novel graphene oxide cotton fibre (GOF) was used to adsorb flavonoids from crude ethanol extracts derived from apple peels. Ultra-high pressure liquid chromatography-mass spectrometry was used to analyse polyphenol content, and the resulting data demonstrated that GOF-based flash chromatography can be used to efficiently separate polyphenols from sugars and can facilitate the removal of 95% of the sugar content. Flavonoids can be easily separated from phenolic acids. Chalcones and flavonols were eluted with 100% methanol and subsequently flavan-3-ols can be eluted with 0...
April 20, 2017: Natural Product Research
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