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https://www.readbyqxmd.com/read/28743083/hall-effect-biosensors-with-ultraclean-graphene-film-for-improved-sensitivity-of-label-free-dna-detection
#1
Phan Thi Kim Loan, Dongqin Wu, Chen Ye, Xiaoqing Li, Vu Thanh Tra, Qiuping Wei, Li Fu, Aimin Yu, Lain-Jong Li, Cheng-Te Lin
The quality of graphene strongly affects the performance of graphene-based biosensors which are highly demanded for the sensitive and selective detection of biomolecules, such as DNA. This work reported a novel transfer process for preparing a residue-free graphene film using a thin gold supporting layer. A Hall effect device made of this gold-transferred graphene was demonstrated to significantly enhance the sensitivity (≈ 5 times) for hybridization detection, with a linear detection range of 1pM to 100nM for DNA target...
July 19, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28743080/the-role-of-hexon-in-egg-drop-syndrome-virus-edsv-inducing-apoptosis-in-duck-embryo-fibroblast-cells
#2
Xuefeng Qi, Jiamin Xu, Zugui Wang, Xueping Wang, Jingyu Wang
Although extensive efforts have been made to understand adenovirus infection in human cells, little is known for egg drop syndrome virus (EDSV) infection in the avian-derived cells. In this study, the effects of EDSV infection as well as the possible role hexon protein, the main building block of the EDSV capsid, on apoptosis induction in duck embryo fibroblast (DEF) cells was examined. Flow cytometry analysis and TUNEL assay revealed that EDSV infection induced significant apoptosis in DEF cells compared with mock infected cells...
July 17, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28743058/oral-nanotherapeutics-redox-nanoparticles-attenuate-ultraviolet-b-radiation-induced-skin-inflammatory-disorders-in-kud-hr-hairless-mice
#3
Chitho P Feliciano, Yukio Nagasaki
The active participation of an anti-inflammatory drug in the biological pathways of inflammation is crucial for the achievement of beneficial and therapeutic effects. This study demonstrated the development of redox nanoparticles that can circulate in the blood at significantly high levels, thus increasing their efficacy as an oral treatment against the deleterious effects of reactive oxygen species (ROS) in an in vivo inflammatory skin model. To confirm the blood bioavailability of the nanoparticles, mice were injected with the nanoparticles solution (RNP(N)) via oral gavage...
July 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28743044/electrophysiological-and-gene-expression-characterization-of-the-ontogeny-of-nestin-expressing-cells-in-the-adult-mouse-midbrain
#4
Anupama Dey, Parisa Farzanehfar, Elena V Gazina, Tim D Aumann
The birth of new neurons, or neurogenesis, in the adult midbrain is important for progressing dopamine cell-replacement therapies for Parkinson's disease. Most studies suggest newborn cells remain undifferentiated or differentiate into glia within the adult midbrain. However, some studies suggest nestin+neural precursor cells (NPCs) have a propensity to generate new neurons here. We sought to confirm this by administering tamoxifen to adult NesCreER(T2)/R26eYFP transgenic mice, which permanently labelled adult nestin-expressing cells and their progeny with enhanced yellow fluorescent protein (eYFP)...
July 4, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28742687/the-allosteric-hemoglobin-effector-itpp-inhibits-metastatic-colon-cancer-in-mice
#5
Perparim Limani, Michael Linecker, Marcel A Schneider, Philipp Kron, Christoph Tschuor, Ekaterina Kachaylo, Udo Ungethuem, Claude Nicolau, Jean-Marie Lehn, Rolf Graf, Bostjan Humar, Pierre-Alain Clavien
OBJECTIVE: To test the effects of enhanced intracellular oxygen contents on the metastatic potential of colon cancer. BACKGROUND: Colorectal cancer is the commonest gastrointestinal carcinoma. Distant metastases occur in half of patients and are responsible for most cancer-related deaths. Tumor hypoxia is central to the pathogenesis of metastases. Myo-Inositoltrispyrophosphate (ITPP), a nontoxic, antihypoxic compound, has recently shown significant benefits in experimental cancer, particularly when combined with standard chemotherapy...
July 24, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28742650/reliable-and-easy-to-use-liquid-chromatography-tandem-mass-spectrometry-method-for-simultaneous-analysis-of-fluconazole-isavuconazole-itraconazole-hydroxy-itraconazole-posaconazole-and-voriconazole-in-human-plasma-and-serum
#6
Carsten Müller, David Gehlen, Cornelia Blaich, Domenik Prozeller, Blasius Liss, Thomas Streichert, Martin H J Wiesen
BACKGROUND: A fast and easy-to-use liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination and quantification of six triazoles (fluconazole (FLZ), isavuconazole (ISZ), itraconazole (ITZ), hydroxy-itraconazole (OH-ITZ), posaconazole (PSZ), voriconazole (VRZ)) in human plasma and serum was developed and validated for therapeutic drug monitoring (TDM). METHODS: Sample preparation was based on protein precipitation with acetonitrile and subsequent centrifugation...
July 24, 2017: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/28742337/gallium-complexation-stability-and-bioconjugation-of-1-4-7-triazacyclononane-derived-chelators-with-azaheterocyclic-arms
#7
Alexander Schmidtke, Tilman Läppchen, Christian Weinmann, Lorenz Bier-Schorr, Manfred Keller, Yvonne Kiefer, Jason P Holland, Mark D Bartholomä
We have recently introduced a 1,4,7-triazacyclononane (TACN) based chelating system with additional five-membered azaheterocyclic substituents for complexation of radioactive Cu(2+) ions. In this work, we investigated the complexation properties of these novel chelators with Ga(3+). In labeling experiments, we could show that the penta- and hexadentate imidazole derivatives NODIA-Me 4 and NOTI-Me 1 can be labeled with (68)Ga in specific activities up to ∼30 MBq nmol(-1), while the corresponding thiazole derivative NOTThia 2 did not label satisfactorily under identical conditions...
July 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28742327/amphiphilic-peptide-nanorods-based-on-oligo-phenylalanine-as-a-biocompatible-drug-carrier
#8
Su Jeong Song, Seulgi Lee, Kyoung-Seok Ryu, Joon Sig Choi
Peptide nanostructure has been widely explored for drug delivery systems in recent studies. Peptides possess comparatively lower cytotoxicity and are more efficient than polymeric carriers. Here, we propose a peptide nanorod system, composed of an amphiphilic oligo-peptide RH3F8 (Arg-His3-Phe8) as a drug delivery carrier. Arginine is an essential amino acid in typical cell penetration peptides, and histidine induces endo/lysosomal escape because of its proton sponge effect. Phenylalanine is introduced to provide rich hydrophobicity for stable self-assembly and drug encapsulation...
July 25, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28742292/effects-of-a-course-of-right-unilateral-ultrabrief-pulse-electroconvulsive-therapy-combined-with-venlafaxine-on-insomnia-symptoms-in-elderly-depressed-patients
#9
W Vaughn McCall, Sarah H Lisanby, Peter B Rosenquist, Mary Dooley, Mustafa M Husain, Rebecca G Knapp, Georgios Petrides, Matthew V Rudorfer, Robert C Young, Shawn M McClintock, Martina Mueller, Joan Prudic, Robert M Greenberg, Richard D Weiner, Samuel H Bailine, Mary Anne Riley, Laryssa McCloud, Charles H Kellner
OBJECTIVE: Antidepressant medications have a variety of effects on sleep, apart from their antidepressant effects. It is unknown whether electroconvulsive therapy (ECT) has effects on perceived sleep in depressed patients. This secondary analysis examines the effects of ECT on perceived sleep, separate from its antidepressant effects. METHODS: Elderly patients with major depressive disorder, as defined by DSM-IV, received open-label high-dose, right unilateral ultrabrief pulse ECT, combined with venlafaxine, as part of participating in phase 1 of the National Institute of Mental Health-supported study Prolonging Remission in Depressed Elderly (PRIDE)...
July 18, 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28742259/off-label-use-of-rituximab-in-autoimmune-disease-in-the-top-end-of-the-northern-territory-2008-2016
#10
Sarah Wongseelashote, Vipin Tayal, Peter Francis Bourke
BACKGROUND: Rituximab, an anti-CD20 B cell depleting monoclonal antibody, is increasingly prescribed off-label for a range of autoimmune diseases. There has not previously been an audit of off-label rituximab use in the Northern Territory, where the majority of patients are Aboriginal. AIMS: To retrospectively evaluate off-label rituximab use in autoimmune diseases in the Top End of the Northern Territory. METHOD: We performed a retrospective audit of eight years of off-label rituximab use at the Royal Darwin Hospital, the sole tertiary referral centre for the Darwin, Katherine and East Arnhem regions...
July 25, 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28742226/documentation-of-penicillin-adverse-drug-reactions-in-electronic-health-records-inconsistent-use-of-allergy-and-intolerance-labels
#11
Joshua M Inglis, Gillian E Caughey, William Smith, Sepehr Shakib
BACKGROUND: The majority of patients with penicillin allergy labels tolerate penicillins. Inappropriate avoidance of penicillin is associated with increased hospitalisation, infections and healthcare costs. AIMS: To examine the documentation of penicillin adverse drug reactions (ADR) in a large-scale hospital-based electronic health record. METHODS: Penicillin ADRs were extracted from 96,708 patient records in the Enterprise Patient Administration System in South Australia...
July 25, 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28742213/derivatization-agents-for-electrochemical-detection-in-amino-acid-peptide-and-protein-separations-the-hidden-electrochemistry
#12
REVIEW
Tania Sierra, Agustin G Crevillen, Alberto Escarpa
In proteomics and clinical analysis, LIF and MS are the most used detectors coupled to separation techniques. MS offers good sensitivity and analyte identification ability but, as counterbalance, it is expensive and it needed background electrolytes compatible with mass spectrometers. LIF detection offers the highest sensitivity but, in general, proteins, peptides and amino acids are not fluorescents so it is necessary the use of fluorescence tags. This fact hindered the potential sensitivity of LIF detection due to the difficulty of labeling analytes at extremely low concentrations...
July 25, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28742134/hemostasis-pad-combined-with-compression-device-after-transradial-coronary-procedures-a-randomized-controlled-trial
#13
Si-Hyuck Kang, Donghoon Han, Sehun Kim, Chang-Hwan Yoon, Jin-Joo Park, Jung-Won Suh, Young-Seok Cho, Tae-Jin Youn, In-Ho Chae
BACKGROUND: Arterial access and hemostasis are important processes during percutaneous coronary procedures. In this study, we tested if the use of chitosan-based pads on top of compression devices could improve hemostasis efficacy compared with compression devices alone after transradial coronary angiography or interventions. METHODS: This study was a single-center open-label randomized controlled trial. Patients who underwent coronary angiography or intervention with the transradial approach were randomly assigned to the study (compression device and a chitosan-based pad) or control (compression devices alone) group in a 2:1 fashion...
2017: PloS One
https://www.readbyqxmd.com/read/28742030/maximum-persistency-via-iterative-relaxed-inference-with-graphical-models
#14
Alexander Shekhovtsov, Paul Swoboda, Bogdan Savchynskyy
We consider the NP-hard problem of MAP-inference for undirected discrete graphical models. We propose a polynomial time and practically efficient algorithm for finding a part of its optimal solution. Specifically, our algorithm marks some labels of the considered graphical model either as (i) optimal, meaning that they belong to all optimal solutions of the inference problem; (ii) non-optimal if they provably do not belong to any solution. With access to an exact solver of a linear programming relaxation to the MAP-inference problem, our algorithm marks the maximal possible (in a specified sense) number of labels...
July 24, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28741944/substrate-recognition-of-glycoprotein-folding-sensor-uggt-analyzed-by-site-specifically-15n-labeled-glycopeptide-and-small-glycopeptide-library-prepared-by-parallel-native-chemical-ligation
#15
Masayuki Izumi, Rie Kuruma, Ryo Okamoto, Akira Seko, Yukishige Ito, Yasuhiro Kajihara
UDP-glucose:glycoprotein glucosyltransferase (UGGT) distinguishes glycoproteins in non-native conformations from those in native conformations, and glucosylates only non-native glycoproteins. To analyze how UGGT recognizes non-native glycoproteins, we chemically synthesized site-specifically 15N-labeled interleukin 8 (IL-8) C-terminal (34-72) glycopeptides bearing a Man9GlcNAc2 (M9) oligo-saccharide. Chemical shift perturbation mapping NMR ex-periments suggested that Phe65 of the glycopeptide specifi-cally interacts with UGGT...
July 25, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28741935/super-photostable-phosphole-based-dye-for-multiple-acquisition-stimulated-emission-depletion-imaging
#16
Chenguang Wang, Masayasu Taki, Yoshikatsu Sato, Aiko Fukazawa, Tetsuya Higashiyama, Shigehiro Yamaguchi
As stimulated emission depletion (STED) microscopy can provide structural details of cells with an optical resolution beyond the diffraction limit, it has become an indispensable tool in cell biology. However, the intense STED laser beam usually causes rapid photobleaching of the employed fluorescent dyes, which significantly limits the utility of STED microscopy from a practical perspective. Herein we report a new design of super-photostable dye, PhoxBright 430 (PB430), comprising a fully ring-fused π-conjugated skeleton with an electron-accepting phosphole P-oxide unit...
July 25, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28741904/prevention-of-childhood-obesity-and-food-policies-in-latin-america-from-research-to-practice
#17
R Pérez-Escamilla, C K Lutter, C Rabadan-Diehl, A Rubinstein, A Calvillo, C Corvalán, C Batis, E Jacoby, S Vorkoper, L Kline, E Ewart-Pierce, J A Rivera
BACKGROUND: Addressing childhood obesity in Latin America requires a package of multisectoral, evidence-based policies that enable environments conducive to healthy lifestyles. OBJECTIVE: Identify and examine key elements to translating research into effective obesity policies in Latin America. METHODS: We examined obesity prevention policies through case studies developed with an expert in the specific policy. Policies were selected based on their level of implementation, visibility and potential impact to reduce childhood obesity...
July 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28741791/comparison-of-the-safety-and-effectiveness-of-apixaban-versus-warfarin-in-patients-with-severe-renal-impairment-an-alternative-viewpoint
#18
Megan Z Roberts, T Michael Farley, Ryan E Owens
We thank Dr. Stanton and colleagues for their great work evaluating the clinical outcomes of apixaban in patients with severe renal dysfunction, ultimately concluding apixaban is a reasonable alternative to warfarin.(1) One question that clinicians should ask before applying this conclusion to clinical practice is what dose of apixaban should be used? The authors note that patients were primarily receiving apixaban 2.5 mg twice/day but gave no further breakdown based upon indication or level of renal dysfunction...
July 25, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28741727/placental-pericytes-and-cytomegalovirus-infectivity-implications-for-hcmv-placental-pathology-and-congenital-disease
#19
David M Aronoff, Hernan Correa, Lisa M Rogers, Ravit Arav-Boger, Donald J Alcendor
PROBLEM: Placental pericytes are essential for placental microvascular function, stability, and integrity. Mechanisms of human cytomegalovirus (HCMV) pathogenesis incorporating placental pericytes are unknown. METHOD OF STUDY: HCMV-infected placental tissue was stained by dual-labeled immunohistochemistry. Primary placental pericytes, cytotrophoblasts, and villous fibroblasts were exposed to HCMV; and infectivity was analyzed by microscopy and immunofluorescence...
July 25, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28741675/pharmacokinetics-of-dinalbuphine-sebacate-and-nalbuphine-in-human-after-intramuscular-injection-of-dinalbuphine-sebacate-in-an-extended-release-formulation
#20
Yu En Tien, Wen-Chuan Huang, Hui-Yuan Kuo, Lily Tai, Yow-Shieng Uang, Wendy H Chern, Jin-Ding Huang
Nalbuphine is a semi-synthetic opioid indicated for the relief of moderate to severe pain. Its short half-life requires frequent injections in clinical practices, resulting in greater incidences of adverse events. We have developed a prodrug of nalbuphine, dinalbuphine sebacate (DNS), dissolved in a simple oil-based injectable formulation, which could deliver and maintain effective blood nalbuphine level. An open-label, prospective, two-period study was performed in healthy volunteers to verify the extended blood concentration profile of nalbuphine...
July 25, 2017: Biopharmaceutics & Drug Disposition
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