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https://www.readbyqxmd.com/read/29679939/semi-volatile-organic-compounds-in-the-snow-of-russian-arctic-islands-archipelago-novaya-zemlya
#1
A T Lebedev, D M Mazur, O V Polyakova, D S Kosyakov, A Yu Kozhevnikov, T B Latkin, I Andreeva Yu, V B Artaev
Environmental contamination of the Arctic has widely been used as a worldwide pollution marker. Various classes of organic pollutants such as pesticides, personal care products, PAHs, flame retardants, biomass burning markers, and many others emerging contaminants have been regularly detected in Arctic samples. Although numerous papers have been published reporting data from the Canadian, Danish, and Norwegian Arctic regions, the environmental situation in Russian Arctic remains mostly underreported. Snow analysis is known to be used for monitoring air pollution in the regions with cold climate in both short-term and long-term studies...
April 18, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29679802/the-evolving-role-of-dna-inter-strand-crosslinks-in-chemotherapy
#2
REVIEW
Halley B Rycenga, David T Long
DNA crosslinking agents make up a broad class of chemotherapy agents that target rapidly dividing cancer cells by disrupting DNA synthesis. These drugs differ widely in both chemical structure and biological effect. In cells, crosslinking agents can form multiple types of DNA lesions with varying efficiencies. Inter-strand crosslinks (ICLs) are considered to be the most cytotoxic lesion, creating a covalent roadblock to replication and transcription. Despite over 50 years in the clinic, the use of crosslinking agents that specialize in the formation of ICLs remains limited, largely due to high toxicity in patients...
April 18, 2018: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29679780/diagnostic-accuracy-of-mdct-in-differentiating-gallbladder-cancer-from-acute-and-xanthogranulomatous-cholecystitis
#3
Ashish P Wasnik, Mathew S Davenport, Ravi K Kaza, William J Weadock, Aaron Udager, Nahid Keshavarzi, Bin Nan, Katherine E Maturen
OBJECTIVE: To determine the diagnostic accuracy of multi-detector CT (MDCT) for differentiating gallbladder cancer from acute and xanthogranulomatous cholecystitis using previously described imaging features. METHODS: In this IRB approved HIPAA-compliant retrospective cohort study, contrast-enhanced MDCT of histologically confirmed acute cholecystitis (n = 17), xanthogranulomatous cholecystitis (n = 25), and gallbladder cancer (n = 18) were reviewed independently by three abdominal radiologists blinded to outcome...
April 14, 2018: Clinical Imaging
https://www.readbyqxmd.com/read/29679762/scavenger-receptor-b-promotes-bacteria-clearance-by-enhancing-phagocytosis-and-attenuates-white-spot-syndrome-virus-proliferation-in-scylla-paramamosian
#4
Tongtong Kong, Yi Gong, Yan Liu, Xiaobo Wen, Ngoc Tuan Tran, Jude Juventus Aweya, Yueling Zhang, Hongyu Ma, Huaiping Zheng, Shengkang Li
Phagocytosis and apoptosis are key cellular innate immune responses against bacteria and virus in invertebrates. Class B scavenger receptors (SRBs), which contain a CD36 domain, are critical pattern recognition receptors (PRRs) of phagocytosis for bacteria and apoptotic cells. In the present study, we identified a member of SRB subfamily in mud crab Scylla paramamosain, named Sp-SRB. The full-length cDNA of Sp-SRB is 2593 bp with a 1629 bp open reading frame (ORF) encoding a putative protein of 542 amino acids, and predicted to contain a CD36 domain with two transmembrane regions at the C- and N-terminals...
April 18, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29679721/effectiveness-evaluation-of-digital-virtual-simulation-application-in-teaching-of-gross-anatomy
#5
Xiaohua Deng, Guowei Zhou, Bing Xiao, Zirui Zhao, Yicheng He, Chujun Chen
INTRODUCTION: digital virtual simulation (DVS) is increasingly used to supplement the teaching of anatomy. DVS can provide the students with three-dimensional (3D) stereoscopic images and precise structures in anatomy teaching. We investigated the effects of digital virtual simulation (DVS) application in gross anatomy teaching. MATERIALS AND METHODS: fourth-year medical students (n=120), majoring clinical medicine in 2013 grade from Xiangya School of Medicine, Central South University, were assigned into four classes...
April 18, 2018: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/29679718/identification-of-differential-phosphorylation-and-sub-cellular-localization-of-the-metastasis-suppressor-ndrg1
#6
Kyung Chan Park, Sharleen V Menezes, Danuta S Kalinowski, Sumit Sahni, Patric J Jansson, Zaklina Kovacevic, Des R Richardson
The metastasis suppressor, N-myc downstream regulated gene-1 (NDRG1), exhibits pleiotropic activity, inhibiting metastasis of various tumor-types, while being correlated with metastasis in others. Notably, NDRG1 phosphorylation and cleavage are associated with its function, although it is unclear if these modifications occur universally, or selectively, in different cancer cell-types and if it contributes to its pleiotropy. Considering the suggested DNA repair role of nuclear NDRG1, the effects of the above post-translational modifications on its nuclear localization was examined...
April 18, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29679715/molecular-phylogeny-and-comparative-morphology-indicate-that-odontostomatids-alveolata-ciliophora-form-a-distinct-class-level-taxon-related-to-armophorea
#7
Noemi M Fernandes, Vinicius F Vizzoni, Bárbara do N Borges, Carlos A G Soares, Inácio D da Silva-Neto, Thiago da S Paiva
The odontostomatids are among the least studied ciliates, possibly due to their small sizes, restriction to anaerobic environments and difficulty in culturing. Consequently, their phylogenetic affinities to other ciliate taxa are still poorly understood. In the present study, we analyzed newly obtained ribosomal gene sequences of the odontostomatids Discomorphella pedroeneasi and Saprodinium dentatum, together with sequences from the literature, including Epalxella antiquorum and a large assemblage of ciliate sequences representing the major recognized classes...
April 18, 2018: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/29679682/bitter-and-sweet-tasting-molecules-it-s-complicated
#8
REVIEW
Antonella Di Pizio, Yaron Ben Shoshan-Galeczki, John E Hayes, Masha Y Niv
"Bitter" and "sweet" are frequently framed in opposition, both functionally and metaphorically, in regard to affective responses, emotion, and nutrition. This oppositional relationship is complicated by the fact that some molecules are simultaneously bitter and sweet. In some cases, a small chemical modification, or a chirality switch, flips the taste from sweet to bitter. Molecules humans describe as bitter are recognized by a 25 member subfamily of class A G-protein coupled receptors (GPCRs) known as TAS2Rs...
April 18, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29679599/mortality-in-pulmonary-arterial-hypertension-patients-treated-with-continuous-prostanoids
#9
S D Bartolome, N Sood, T S Shah, K Styrvoky, F T Torres, K M Chin
INTRODUCTION: Parenteral prostanoids are considered the treatment of choice for patients with severe pulmonary arterial hypertension (PAH). Prognostic studies for patients treated in the modern era are limited. METHODS: In this retrospective cohort study, patients initiating IV epoprostenol or IV or SC treprostinil therapy for PAH from 2007-2016 at UT Southwestern, Dallas, TX and Ohio State University, Columbus, OH were included. Transplant-free survival was assessed from the time of IV/SC initiation and from the time of first follow-up...
April 18, 2018: Chest
https://www.readbyqxmd.com/read/29679573/circrna-expression-analysis-in-lung-adenocarcinoma-comparison-of-paired-fresh-frozen-and-formalin-fixed-paraffin-embedded-specimens
#10
Fan Zhang, Xing Zhao, Hongyan Dong, Jianzhen Xu
Circular RNA (circRNAs) is a novel class of endogenous non-coding RNAs which is widely involved in carcinogenesis. Archived formalin-fixed paraffin-embedded (FFPE) specimens represent valuable resources for cancer research. Currently there is a lack of systematic analysis on the feasibility of circRNAs expression analysis using FFPE samples. Here, we reported the first comparison study of circRNA expression from paired fresh frozen and FFPE specimens of lung adenocarcinoma. circRNAs expression of paired lung adenocarcinoma and adjacent normal samples, starting from either fresh frozen or FFPE materials, were analyzed via a high-throughput circRNA microarray...
April 18, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29679534/determinants-of-reverse-remodeling-of-the-left-atrium-following-transaortic-myectomy
#11
Anita Nguyen, Hartzell V Schaff, Rick A Nishimura, Joseph A Dearani, Jeffrey B Geske, Brian D Lahr, Steve R Ommen
BACKGROUND: In patients with hypertrophic cardiomyopathy (HCM), enlargement of the left atrium (LA) is associated with increased morbidity and mortality due to risk of atrial fibrillation (AF), stroke, and heart failure. In this study, we investigated whether LA reverse remodeling occurs following septal myectomy. METHODS: Between March 2007 and July 2015, 656 patients underwent myectomy at our institution and had pre- and postoperative transthoracic echocardiographic (TTE) recording of LA volume index (LAVI)...
April 18, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29679431/synthesis-and-characterization-of-pyridine-compounds-for-amperometric-measurements-of-leukocyte-esterase
#12
Douglas Hanson, Travis Menard, Teresa Blazek, Stanton McHardy, Waldemar Gorski
The present work introduces a new class of substrates for enzyme leukocyte esterase (LE). The proposed substrates (compounds I-III) react with LE yielding anodic current in a direct proportion to LE activity. The kinetic constants Km and kcat for the enzymatic reactions were determined by amperometry at a glassy carbon electrode. The binding affinity of compounds I-III for LE was two orders of magnitude better than that of existing optical LE substrates. The specificity constant kcat/Km was equal to 2.7, 3...
April 20, 2018: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/29679419/sexual-orientation-differences-in-alcohol-use-trajectories-and-disorders-in-emerging-adulthood-results-from-a-longitudinal-cohort-study-in-the-united-states
#13
Robert W S Coulter, Hee-Jin Jun, Jerel P Calzo, Nhan L Truong, Christina Mair, Nina Markovic, Brittany M Charlton, Anthony J Silvestre, Ron Stall, Heather L Corliss
AIMS: We estimated sexual-orientation differences in alcohol use trajectories during emerging adulthood, and tested whether alcohol use trajectories mediated sexual-orientation differences in alcohol use disorders (AUDs). DESIGN: Longitudinal self-reported survey data from the Growing Up Today Study. SETTING: USA. PARTICIPANTS: 12,493 participants aged 18-25 during the 2003, 2005, 2007, or 2010 surveys. MEASUREMENTS: Stratified by gender, longitudinal latent class analyses estimated alcohol use trajectories (using past-year frequency, quantity, and binge drinking from 2003-2010)...
April 21, 2018: Addiction
https://www.readbyqxmd.com/read/29679364/estimates-of-medication-expenditure-for-ischemic-heart-disease-accompanying-chronic-obstructive-pulmonary-disease
#14
Edyta Rysiak, Izabela Prokop, Ilona Zaręba, Robert M Mróz
Ischemic heart disease (IHD) is a frequent accompaniment of chronic obstructive pulmonary disease (COPD). Co-occurrence of these two diseases is associated with many risk factors, difficulties in implementing appropriate therapies, numerous complications, and high spending for treatment. All these elements significantly reduce the quality of life of patients. The aim of this study was to estimate the expenditure for medications involved with IHD pharmacotherapy in the course of COPD. This retrospective study was based on the review of medical files of 57 patients, 27 women and 30 men, diagnosed with IHD, according to the severity classification, in the course of COPD which was staged according to the GOLD criteria...
April 21, 2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29679312/efficient-production-of-secretory-streptomyces-clavuligerus-%C3%AE-lactamase-inhibitory-protein-blip-in-pichia-pastoris
#15
Kin-Ho Law, Man-Wah Tsang, Yuk-Ki Wong, Ming-San Tsang, Pui-Yee Lau, Kwok-Yin Wong, Kwok-Ping Ho, Yun-Chung Leung
β-Lactamase inhibitory protein (BLIP), a low molecular weight protein from Streptomyces clavuligerus, has a wide range of potential applications in the fields of biotechnology and pharmaceutical industry because of its tight interaction with and potent inhibition on clinically important class A β-lactamases. To meet the demands for considerable amount of highly pure BLIP, this study aimed at developing an efficient expression system in eukaryotic Pichia pastoris (a methylotrophic yeast) for production of BLIP...
April 20, 2018: AMB Express
https://www.readbyqxmd.com/read/29679303/do-the-sglt-2-inhibitors-offer-more-than-hypoglycemic-activity
#16
REVIEW
Eduardo Flores, Carlos G Santos-Gallego, Nely Diaz-Mejía, Juan Jose Badimon
Type 2 diabetes mellitus (T2DM) is one of the most common chronic health conditions in the USA; it affects approximately 10% of adults with up to one-quarter being undiagnosed. T2DM is associated with substantial cardiovascular (CV) morbidity and mortality. T2DM is a pathological condition characterized by elevated levels of glucose and associated with high CV risk. Traditional hypoglycemic drugs have demonstrated their capability for effective and maintained management of high glucose levels, but they have not significantly impacted on the incidence of CV events...
April 20, 2018: Cardiovascular Drugs and Therapy
https://www.readbyqxmd.com/read/29679226/national-estimates-of-emergency-department-visits-for-antibiotic-adverse-events-among-adults-united-states-2011-2015
#17
Andrew I Geller, Maribeth C Lovegrove, Nadine Shehab, Lauri A Hicks, Mathew R P Sapiano, Daniel S Budnitz
BACKGROUND: Detailed, nationally representative data describing high-risk populations and circumstances involved in antibiotic adverse events (AEs) can inform approaches to prevention. OBJECTIVE: Describe US burden, rates, and characteristics of emergency department (ED) visits by adults for antibiotic AEs. DESIGN: Nationally representative, public health surveillance of adverse drug events (National Electronic Injury Surveillance System-Cooperative Adverse Drug Event Surveillance [NEISS-CADES]) and a nationally projected database of dispensed prescriptions (QuintilesIMS), 2011-2015...
April 20, 2018: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/29679173/potential-carbon-loss-associated-with-post-settlement-wetland-conversion-in-southern-ontario-canada
#18
Eunji Byun, Sarah A Finkelstein, Sharon A Cowling, Pascal Badiou
BACKGROUND: Natural wetlands can mitigate ongoing increases in atmospheric carbon by storing any net balance of organic carbon (peat) between plant production (carbon uptake) and microbial decomposition (carbon release). Efforts are ongoing to quantify peat carbon stored in global wetlands, with considerable focus given to boreal/subarctic peatlands and tropical peat swamps. Many wetlands in temperate latitudes have been transformed to anthropogenic landscapes, making it difficult to investigate their natural/historic carbon balance...
April 20, 2018: Carbon Balance and Management
https://www.readbyqxmd.com/read/29679010/genetically-engineered-two-warhead-evasins-provide-a-method-to-achieve-precision-targeting-of-disease-relevant-chemokine-subsets
#19
Yara Alenazi, Kamayani Singh, Graham Davies, James R O Eaton, Philip Elders, Akane Kawamura, Shoumo Bhattacharya
Both CC and CXC-class chemokines drive inflammatory disease. Tick salivary chemokine-binding proteins (CKBPs), or evasins, specifically bind subsets of CC- or CXC-chemokines, and could precisely target disease-relevant chemokines. Here we have used yeast surface display to identify two tick evasins: a CC-CKBP, P1243 from Amblyomma americanum and a CXC-CKBP, P1156 from Ixodes ricinus. P1243 binds 11 CC-chemokines with Kd  < 10 nM, and 10 CC-chemokines with Kd between 10 and 100 nM. P1156 binds two ELR + CXC-chemokines with Kd  < 10 nM, and four ELR + CXC-chemokines with Kd between 10 and 100 nM...
April 20, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29678966/an-evaluation-of-prescribing-trends-and-patterns-of-claims-within-the-preferred-drugs-initiative-in-ireland-2011-2016-an-interrupted-time-series-study
#20
Ronald McDowell, Kathleen Bennett, Frank Moriarty, Sarah Clarke, Michael Barry, Tom Fahey
OBJECTIVE: To examine the impact of the Preferred Drugs Initiative (PDI), an Irish health policy aimed at enhancing evidence-based cost-effective prescribing, on prescribing trends and the cost of prescription medicines across seven medication classes. DESIGN: Retrospective repeated cross-sectional study spanning the years 2011 - 2016. SETTING: Health Service Executive Primary Care Reimbursement Service pharmacy claims data for General Medical Services (GMS) patients, approximately 40% of the Irish population...
April 20, 2018: BMJ Open
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