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https://www.readbyqxmd.com/read/29097910/analytical-interference-by-contrast-agents-in-biochemical-assays
#1
Sigrid Otnes, Niels Fogh-Andersen, Janne Rømsing, Henrik S Thomsen
Objective: To provide a clinically relevant overview of the analytical interference by contrast agents (CA) in laboratory blood test measurements. Materials and Methods: The effects of five CAs, gadobutrol, gadoterate meglumine, gadoxetate disodium, iodixanol, and iomeprol, were studied on the 29 most frequently performed biochemical assays. One-day-old plasma, serum, and whole blood were spiked with doses of each agent such that the gadolinium agents and the iodine agents reached concentrations of 0...
2017: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29074393/dcf1-subcellular-localization-and-its-function-in-mitochondria
#2
Yanlu Chen, Ruili Feng, Guanghong Luo, Jianjian Guo, Yajiang Wang, Yangyang Sun, Lili Zheng, Tieqiao Wen
Dendritic cell factor 1 (DCF1) is a transmembrane protein that plays important roles in regulating neural stem cell differentiation and dendritic spine formation. Apart from its cytoplasmic functions, DCF1 plays a role in autophagy during the regulation of amyloid precursor proteins. However, the subcellular localization of DCF1 remains unknown. Therefore, in this study, DCF1 tagged with green fluorescent protein was transiently expression in HelaS3 and HEK293T cells. The results showed that DCF1 was widely expressed in different organelles, including the mitochondria, Golgi apparatus, endoplasmic reticulum, endosomes and lysosomes...
October 23, 2017: Biochimie
https://www.readbyqxmd.com/read/29048268/density-separation-of-quiescent-yeast-using-iodixanol
#3
Ishtiaque Quasem, Christopher J Luby, Charles R Mace, Stephen M Fuchs
As yeast are starved of nutrients, they enter G0, a quiescent state. Quiescent yeast (Q) cells retain viability for extended periods of time and resume growth following supplementation of missing nutrients. As such, Q cells have become a valuable model for studying longevity and self-renewal of chronologically aged cells. Traditional isolation of Q cells involves a relatively long centrifugation time through a continuous density gradient. Here, we describe a rapid and cost-effective Q-cell isolation technique that uses a single-density, one-step gradient prepared from media containing iodixanol...
October 1, 2017: BioTechniques
https://www.readbyqxmd.com/read/29030579/effect-of-iodinated-contrast-media-on-renal-perfusion-a-randomized-comparison-study-in-pigs-using-quantitative-contrast-enhanced-ultrasound-ceus
#4
Philipp Lamby, Friedrich Jung, Stefanie Graf, Lotte Schellenberg, Johannes Falter, Natascha Platz-da-Silva, Stephan Schreml, Lukas Prantl, Ralf P Franke, Ernst M Jung
The administration of iodinated contrast media (CM) can cause microcirculatory disorder leading to acute renal dysfunction. In a prospective, randomized investigation two CM (Iodixanol vs Iopromide) were compared in 16 pigs. Each animal received 10 intra-aortal injections (5 ml Iodixanol or 4.32 ml Iopromide). Microcirculation was assessed using contrast-enhanced ultrasound (CEUS) directly on the kidney surface using time-to-peak (TTP) and blood-volume-analysis. Macroscopic observations were documented...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28958858/hepatitis-e-virus-lifecycle-and-identification-of-3-forms-of-the-orf2-capsid-protein
#5
Claire Montpellier, Czeslaw Wychowski, Ibrahim M Sayed, Jean-Christophe Meunier, Jean-Michel Saliou, Maliki Ankavay, Anne Bull, André Pillez, Florence Abravanel, François Helle, Etienne Brochot, Hervé Drobecq, Rayan Farhat, Cécile-Marie Aliouat-Denis, Juliano G Haddad, Jacques Izopet, Philip Meuleman, Anne Goffard, Jean Dubuisson, Laurence Cocquerel
BACKGROUND & AIMS: Hepatitis E virus (HEV) infection is a major cause of acute hepatitis worldwide. Approximately 2 billion people live in areas endemic for HEV and are at risk of infection. The HEV genome encodes 3 proteins, including the ORF2 capsid protein. Detailed analyses of the HEV lifecycle has been hampered by the lack of an efficient viral culture system. METHODS: We performed studies with gt3 HEV cell culture-produced particles (HEVcc) and patient blood and stool samples...
September 25, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28936471/analysis-of-hepatitis-c-virus-particle-heterogeneity-in-immunodeficient-human-liver-chimeric-fah-mice
#6
Ursula Andreo, Ype P de Jong, Margaret A Scull, Jing W Xiao, Koen Vercauteren, Corrine Quirk, Michiel C Mommersteeg, Sonia Bergaya, Arjun Menon, Edward A Fisher, Charles M Rice
BACKGROUND & AIMS: Hepatitis C virus (HCV) is a leading cause of chronic liver diseases and the most common indication for liver transplantation in the United States. HCV particles in the blood of infected patients are characterized by heterogeneous buoyant densities, likely owing to HCV association with lipoproteins. However, clinical isolates are not infectious in vitro and the relative infectivity of the particles with respect to their buoyant density therefore cannot be determined, pointing to the need for better in vivo model systems...
November 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28929640/rho-kinase-inhibitor-fasudil-attenuates-contrast-induced-acute-kidney-injury
#7
Yiming Wang, Hao Zhang, Zhijian Yang, Dengshun Miao, Dingguo Zhang
In this study, we tested the hypothesis that fasudil, a Rho kinase inhibitor, would protect against contrast-induced acute kidney injury (CI-AKI) in a mouse model and attempted to elucidate the mechanism involved. Mice subjected to unilateral ligation of the left anterior renal pedicle were divided into four groups: (1) control group, (2) CI-AKI induced by contrast media (CM group), (3) CI-AKI plus low-dose fasudil (LD group) and (4) CI-AKI plus high-dose fasudil (HD group). Animals from groups 2-4 received iodixanol (4...
September 19, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28888094/low-dose-scanning-technology-combined-with-low-concentration-contrast-material-in-renal-computed-tomography-angiography-cta-a-preliminary-study
#8
Sulan Liu, Wei Li, Hao Shi, Huaqiang Sheng, Jingli Fan, Jingzhen He, Hongjun Sun
BACKGROUND This study is to investigate the feasibility of low iodine concentration contrast material (CM) combined with low tube voltage and adaptive statistical iterative reconstruction (ASIR) in renal computed tomography angiography (CTA). MATERIAL AND METHODS A total of 136 patients were enrolled in this prospective trial, and randomly divided into two groups: group A (n=68) and group B (n=68). Group A received 120-kVp and iopromide (370 mg/mL) with filtered back projection (FBP) reconstruction, and group B received 100-kVp and iodixanol (270 mg/mL) with ASIR 40% (ASIR40)...
September 9, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28869747/live-imaging-looks-deeper
#9
Tanner C Fadero, Paul S Maddox
Iodixanol provides an easy and affordable solution to a problem that has limited resolution and brightness when imaging living samples.
September 4, 2017: ELife
https://www.readbyqxmd.com/read/28836837/effects-of-changes-in-analytic-variables-and-contrast-medium-on-estimation-of-glomerular-filtration-rates-by-computed-tomography-in-healthy-dogs
#10
Yuri Matsuda, Miori Kishimoto, Kazuya Kushida, Kazutaka Yamada, Miki Shimizu, Hiroshi Itoh
OBJECTIVE To investigate effects of changes in analytic variables and contrast medium osmolality on glomerular filtration rate estimated by CT (CT-GFR) in dogs. ANIMALS 4 healthy anesthetized Beagles. PROCEDURES GFR was estimated by inulin clearance, and dogs underwent CT-GFR with iodinated contrast medium (iohexol or iodixanol) in a crossover-design study. Dynamic renal CT scanning was performed. Patlak plot analysis was used to calculate GFR with the renal cortex or whole kidney selected as the region of interest...
September 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28828669/isolation-of-extracellular-vesicles-in-saliva-using-density-gradient-ultracentrifugation
#11
Kazuya Iwai, Satoshi Yamamoto, Mitsutaka Yoshida, Kiyotaka Shiba
This chapter describes a method for isolating human salivary extracellular vesicles (EVs) using density gradient ultracentrifugation. Standard protocols established for isolation of EVs from blood or a conditioned medium of cultured cells do not work for whole saliva, due to its viscosity. Therefore, procedures including a pretreatment step and utilizing iodixanol as a gradient material enable EVs to be concentrated to a 1.1 g/ml density. This protocol is compatible with both swing and angle rotors. By employing an angle rotor, which enables high g-force, the centrifugation time was reduced to 4 h from the 17 h required when using a swing rotor...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28809582/iodixanol-versus-iopromide-at-coronary-ct-angiography-lumen-opacification-and-effect-on-heart-rhythm-the-randomized-isocor-trial
#12
Marisa M Lubbers, Marc Kock, André Niezen, Tjebbe Galema, Marcel Kofflard, Tobias Bruning, Henriette S Kooij, Hanneke van Valen, Marcel Dijkshoorn, Ronald Booij, Anthony Padmos, Alain Vogels, Ricardo P J Budde, Koen Nieman
Purpose To show that equal coronary lumen opacification can be achieved with iso- and low-osmolar contrast media when it is injected at the same iodine delivery rate with contemporary cardiac computed tomographic (CT) protocols and to investigate the cardiovascular effect of iso-osmolar contrast media and the image quality achieved. Materials and Methods Institutional review board approval and written informed consent were obtained for the Effect of Iso-osmolar Contrast Medium on Coronary Opacification and Heart Rhythm in Coronary CT Angiography, or IsoCOR, trial...
August 15, 2017: Radiology
https://www.readbyqxmd.com/read/28806208/systemic-hypotension-following-intravenous-administration-of-nonionic-contrast-medium-during-computed-tomography-iopromide-versus-iodixanol
#13
Gerlig Widmann, Reto Bale, Hanno Ulmer, Daniel Putzer, Peter Schullian, Franz-Josef Wiedermann, Wolfgang Lederer
BACKGROUND: In light of the increasing number of radiologic interventions performed under general anesthesia, the effects of contrast media (CM) on circulation and organ perfusion are of paramount importance. The objectives of this study were to systematically quantify effects on blood pressure, heart rate, and kidney function following intravenous administration of nonionic CM with normal and low osmolality. METHODS: In this controlled, double-blinded phase IV clinical trial, 40 consecutive patients were randomly assigned to receive repeated measures of either low-osmolar iopromide or iso-osmolar iodixanol...
August 10, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28777459/iodixanol-versus-iopromide-in-cancer-patients-evidence-from-a-randomized-clinical-trial
#14
Irene Terrenato, Francesca Sperati, Felice Musicco, Anna F Pozzi, Annunziata di Turi, Mauro Caterino, Elisabetta de Lutio di Castelguidone, Sergio V Setola, Massimo Bellomi, Carlo E Neumaier, Laura Conti, Giovanni Cigliana, Roberta Merola, Anna Antenucci, Giulia Orlandi, Antonio Giordano, Maddalena Barba, Stefano Canitano
To assess the safety profile of iso-osmolar contrast medium (CM) versus low osmolar CM in cancer patients with an estimated glomerular filtration rate (eGFR) >60 ml/min. In this multicenter, blind trial of patients seeking a chest-abdomen-pelvis contrast enhanced computed tomography (CT) with iodated CM, participants were centrally randomized to iodixanol or iopromide. Contrast induced nephropathy (CIN) at 24 and/or 72 hr were our primary outcomes. We further considered irreversible CIN, average eGFR percentage variation (%Δ), and adverse events (AEs)...
August 4, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28762184/nef-is-secreted-in-exosomes-from-nef-gfp-expressing-and-hiv-1-infected-human-astrocytes
#15
Pia Pužar Dominkuš, Jana Ferdin, Ana Plemenitaš, Boris Matija Peterlin, Metka Lenassi
HIV-1 infection of the central nervous system causes HIV-associated neurocognitive disorders, even in aviremic patients. Although astrocyte malfunction was associated to these disorders, their implication is overshadowed by contributions of microglia and macrophages. Astrocytes are infected with HIV-1 in vivo and express a relevant amount of viral protein Nef. Nef was shown to stimulate its own release in exosomes from diverse cell types, which in turn have damaging effects on neighboring cells. Using immunoblotting and electron microscopy, we showed that human astrocytes expressing Nef...
October 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28761034/successful-desensitization-to-radiocontrast-media-in-two-high-risk-cardiac-patients
#16
Mona Al-Ahmad, Tito Rodriguez Bouza
Hypersensitivity reactions to radiocontrast media (RCM) are common and in severe cases may present a challenge for treating physician in cases when premedication fails or the patient presents with severe comorbidities. We describe two cases in need of radiocontrast media after a severe reaction on previous exposure to iohexol. One presented anaphylactic reaction to RCM despite premedication and another presented with angina. Both cases were treated with a desensitization protocol to iodixanol. In conclusion, desensitization to radiocontrast media may be considered in patients with previously unsuccessful premedication and/or severe acute comorbidities...
July 2017: Annals of Saudi Medicine
https://www.readbyqxmd.com/read/28731176/hypotonic-contrast-media-is-more-toxic-than-isotonic-contrast-media-on-endothelial-cells-in-vivo-and-in-vitro
#17
Lihui Ren, Ping Wang, Zuoyan Wang, Yong Liu, Shuzheng Lv
The aim of the current study was to investigate the cytotoxic effects of hypotonic (iopamidol) and isotonic (iodixanol) contract media (CMs) in vitro and in vivo. A total of 60 Wistar rats were included and were randomly divided into three groups (20 rats per group). Iodixanol (4 g iodine/kg), iopamidol (4 g iodine/kg) or equal volume of normal saline was injected via tail vein. HUVEC and H5V cell viability was determined by Cell Counting Kit‑8 agents. Western blotting was performed to detect ATP‑binding cassette subfamily G member 1 (ABCG1) expression...
October 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28708716/the-influence-of-contrast-agent-s-osmolarity-on-iodine-delivery-protocol-in-coronary-computed-tomography-angiography-comparison-between-iso-osmolar-iodixanol-320-and-low-osmolar-iomeprol-370
#18
Xiaohan Yang, Weiwei Huang, Wangyan Liu, Yinsu Zhu, Yi Xu, Guanyu Yang, Lijun Tang, Xiaomei Zhu
OBJECTIVES: This study aims to assess whether iodine-contained contrast agents with different osmolarity affect iodine delivery protocol during coronary computed tomography angiography (CCTA). METHODS: Patients who underwent CCTA were randomized to receive contrast media either iodixanol-320 (iso-osmolar group) or iopromide-370 (low-osmolar group). Contrast protocols were recorded. Tube voltage of 100 kV was chosen for patients with body mass index of less than or equal to 25 (n = 224) and tube voltage of 120 kV for patients with body mass index of greater than 25 (n = 165)...
July 13, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28708059/a-tunable-refractive-index-matching-medium-for-live-imaging-cells-tissues-and-model-organisms
#19
Tobias Boothe, Lennart Hilbert, Michael Heide, Lea Berninger, Wieland B Huttner, Vasily Zaburdaev, Nadine L Vastenhouw, Eugene W Myers, David N Drechsel, Jochen C Rink
In light microscopy, refractive index mismatches between media and sample cause spherical aberrations that often limit penetration depth and resolution. Optical clearing techniques can alleviate these mismatches, but they are so far limited to fixed samples. We present Iodixanol as a non-toxic medium supplement that allows refractive index matching in live specimens and thus substantially improves image quality in live-imaged primary cell cultures, planarians, zebrafish and human cerebral organoids.
July 14, 2017: ELife
https://www.readbyqxmd.com/read/28708022/is-intravenous-administration-of-iodixanol-associated-with-increased-risk-of-acute-kidney-injury-dialysis-or-mortality-a-propensity-score-adjusted-study
#20
Jennifer S McDonald, Robert J McDonald, Eric E Williamson, David F Kallmes
Purpose To compare the rates of acute kidney injury (AKI), emergent dialysis, and short-term mortality between patients who underwent intravenous administration of the iso-osmolar contrast material (IOCM) iodixanol 320 and patients who underwent a noncontrast computed tomography (CT) examination. Materials and Methods Study design and implementation were overseen by an institutional review board and conformed to HIPAA guidelines on patient data integrity. All patients who underwent an iodixanol-enhanced (IOCM group) or a noncontrast (noncontrast group) CT examination from January 2003 to December 2014 were identified...
November 2017: Radiology
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