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https://www.readbyqxmd.com/read/29352755/a-mos1-transposase-in-vivo-assay-to-screen-new-hiv-1-integrase-inhibitors
#1
Mariana Cancian, Elgion L S Loreto
The integrase and transposase enzymes of retrovirus and transposons, respectively, share the catalytic DDE domain. In vitro assays showed that inhibitors of HIV-1 integrase generally inhibit the mariner Mos1 transposase. Using a Drosophila strain in which the mobilisation of the mariner element can be quantified by mosaic eyes, we showed that flies maintained in medium containing 210 µM to 4 mM of raltegravir, or 1 or 2 mM of dolutegravir, which are HIV-1 integrase inhibitor used in AIDS treatment, have 23-33% less somatic mobilisation in mosaic eyes when treated with raltegravir and 28-32% when treated with dolutegravir...
January 19, 2018: Genetica
https://www.readbyqxmd.com/read/29352727/re-evaluation-of-target-lipid-model-derived-hc5-predictions-for-hydrocarbons
#2
Joy A McGrath, Christopher J Fanelli, Dominic M Di Toro, Thomas F Parkerton, Aaron D Redman, Miriam Leon Paumen, Mike Comber, Charles V Eadsforth, Klaas den Haan
The Target Lipid Model (TLM) has been previously applied to predict the aquatic toxicity of hydrocarbons and other non-ionic organic chemicals and for deriving HC5 values, concentrations above which 95% of species should be protected. Several concerns were identified with the TLM-derived HC5 when applied in a substance risk assessment context. These shortcomings were addressed by expanding the acute and chronic toxicity databases to include more diverse taxonomic groups and increase the number of species. The TLM was recalibrated with these expanded databases resulting in critical target lipid body burdens and acute-to-chronic ratios that met the required guidelines for using species sensitivity distributions in substance risk assessment...
January 20, 2018: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29352675/impact-of-intestinal-mannitol-on-hyperammonemia-oxidative-stress-and-severity-of-hepatic-encephalopathy-in-the-ed
#3
Daniel H Montes-Cortés, José L Novelo-Del Valle, Ivonne M Olivares-Corichi, José V Rosas-Barrientos, Luis J Jara, María Pilar Cruz-Domínguez
Hyperammonemia results from hepatic inability to remove nitrogenous products generated by protein metabolism of intestinal microbiota, which leads to hepatic encephalopathy (HE) in chronic liver disease (CLD). In ammonium neurotoxicity, oxidative stress (OxS) plays a pathogenic role. Our objective was to evaluate if intestinal mannitol is as effective and safe as conventional treatment for diminishing hyperammonemia, OxS, and HE in patients with CLD. MATERIAL AND METHODS: We included 30 patients with HE classified by "Haven Criteria for Hepatic Encephalopathy"...
January 10, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29352501/predictors-of-beef-calf-temperament-at-weaning-and-its-impact-on-temperament-at-breeding-and-reproductive-performance
#4
V R Kasimanickam, R L Abdel Aziz, H M Williams, R K Kasimanickam
Two experiments were conducted to determine (i) factors influencing calf temperament at weaning, (ii) association between heifer-calf temperament at weaning and temperament at breeding and (iii) effect of heifer-calf temperament on pregnancy rate per artificial insemination (P/AI). In experiment 1, beef cows and their calves (n = 285) from three farms were used. Sire docility estimated progeny difference (EPD) score, birth type (normal or assisted), calf gender, calf behaviour (during 1st 4 weeks) and calf health status (until weaning) were recorded...
January 19, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29352469/amoxicillin-current-use-in-swine-medicine
#5
REVIEW
D G S Burch, D Sperling
Amoxicillin has become a major antimicrobial substance in pig medicine for the treatment and control of severe, systemic infections such as Streptococcus suis. The minimum inhibitory concentration 90% (MIC 90) is 0.06 μg amoxicillin/ml, and the proposed epidemiological cut-off value (ECOFF) is 0.5 μg/ml, giving only 0.7% of isolates above the ECOFF or of reduced susceptibility. Clinical breakpoints have not been set for amoxicillin against porcine pathogens yet, hence the use of ECOFFs. It has also been successfully used for bacterial respiratory infections caused by Actinobacillus pleuropneumoniae and Pasteurella multocida...
January 19, 2018: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29352409/recent-perspectives-on-the-molecular-basis-of-biofilm-formation-by-pseudomonas-aeruginosa-and-approaches-for-treatment-and-biofilm-dispersal
#6
REVIEW
Sinosh Skariyachan, Vaishnavi Sneha Sridhar, Swathi Packirisamy, Supreetha Toplar Kumargowda, Sneha Basavaraj Challapilli
Pseudomonas aeruginosa, a Gram-negative, rod-shaped bacterium causes widespread diseases in humans. This bacterium is frequently related to nosocomial infections such as pneumonia, urinary tract infections (UTIs) and bacteriaemia especially in immunocompromised patients. The current review focuses on the recent perspectives on biofilms formation by these bacteria. Biofilms are communities of microorganisms in which cells stick to each other and often adhere to a surface. These adherent cells are usually embedded within a self-produced matrix of extracellular polymeric substance (EPS)...
January 19, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/29352085/the-expression-of-bacteriocin-production-and-self-resistance-in-lactobacillus-brevis-174a-is-mediated-by-two-regulatory-proteins
#7
Masafumi Noda, Rumi Miyauchi, Narandalai Danshiitsoodol, Yasuyuki Matoba, Takanori Kumagai, Masanori Sugiyama
We have previously shown that a lactic acid bacterium Lactobacillus (Lb.) brevis 174A isolated from a Citrus iyo fruit produces bacteriocin designated brevicin 174A, which is comprised of two antibacterial polypeptides (designated brevicin 174A-β and 174A-γ). We have also found a gene cluster, composed of eight open reading frames (ORFs), that contains genes for the biosynthesis of brevicin 174A, self-resistance to its own bacteriocin, and two transcriptional regulatory proteins.Some lactic acid bacterial strains have a system to start the production of bacteriocin at an adequate stage of the growth...
January 19, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29351899/web-based-survey-application-to-collect-contextually-relevant-geographic-data-with-exposure-times-application-development-and-feasibility-testing
#8
Abby Rudolph, Karin Tobin, Jonathan Rudolph, Carl Latkin
BACKGROUND: Although studies that characterize the risk environment by linking contextual factors with individual-level data have advanced infectious disease and substance use research, there are opportunities to refine how we define relevant neighborhood exposures; this can in turn reduce the potential for exposure misclassification. For example, for those who do not inject at home, injection risk behaviors may be more influenced by the environment where they inject than where they live...
January 19, 2018: JMIR Public Health and Surveillance
https://www.readbyqxmd.com/read/29351719/synergistic-and-antagonistic-interactions-among-the-particulate-matter-components-in-generating-reactive-oxygen-species-based-on-the-dithiothreitol-assay
#9
Haoran Yu, Jinlai Wei, Yilan Cheng, Kiran Subedi, Vishal Verma
We assessed the interactions among the particulate matter (PM) components in generating the reactive oxygen species (ROS) based on a dithiothreitol (DTT) assay. We started with the standard solutions of known redox-active substances, i.e. quinones (9,10-phenanthraquinone, 1,2-naphthoquinone, 1,4-naphthoquinone and 5-hydroxy-1,4-naphthoquinone) and metals [Cu (II), Mn (II) and Fe (II)]. Both DTT consumption and hydroxyl radical (•OH) generation were measured in the DTT assay. The interactions of Fe were additive with quinones in DTT consumption, but strongly synergistic in •OH generation...
January 19, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29351568/habits-and-beliefs-related-to-food-supplements-results-of-a-survey-among-italian-students-of-different-education-fields-and-levels
#10
Felice Sirico, Salvatore Miressi, Clotilde Castaldo, Rocco Spera, Stefania Montagnani, Franca Di Meglio, Daria Nurzynska
The increasing availability of food supplements, aggressive media advertising, and common beliefs that these substances have only positive effects on health and sport performance indicate a need for continuous monitoring of this phenomenon. The aim of this study was to investigate the habits and beliefs related to diet supplementation among medical, health professional, and other university/high school students by means of a cross-sectional anonymous survey online. Among the respondents aware of supplements, 37...
2018: PloS One
https://www.readbyqxmd.com/read/29351450/cardiac-vanilloid-receptor-1-afferent-depletion-enhances-stellate-ganglion-neuronal-activity-and-efferent-sympathetic-response-to-cardiac-stress
#11
Koji Yoshie, Pradeep S Rajendran, Louis Massoud, OhJin Kwon, Vasudev Tadimeti, Siamak Salavatian, Jeffrey Laurence Ardell, Kalyanam Shivkumar, Olujimi A Ajijola
Afferent fibers expressing the vanilloid receptor 1 (VR1) channel are implicated in cardiac nociception, however, their role in modulating reflex responses to cardiac stress is not well-understood. We evaluated this role in Yorkshire pigs by percutaneous epicardial application of resiniferatoxin (RTX), a toxic activator of the VR1 channel, resulting in depletion of cardiac VR1-expressing afferents. Hemodynamics, epicardial activation recovery intervals (ARIs), and in vivo activity of stellate ganglion (SG) neurons (SGNs) were recorded in control and RTX-treated animals...
January 16, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29351384/association-with-deviant-peers-across-adolescence-subtypes-developmental-patterns-and-long-term-outcomes
#12
Julia Price, Deborah A G Drabick, Ty A Ridenour
Indices of deviant peer group involvement are inconsistent and confound type, frequency, and severity of deviant peer behaviors. These measurement approaches thus obfuscate potential meaningful differences in deviant peer involvement in terms of subtypes, developmental patterns, and long-term outcomes. The current study employed latent class analysis to derive subtypes of deviant peer involvement and examined relations to substance use disorder in adulthood, a common outcome of deviant peer involvement. Youth (76% Caucasian) completed assessments across four time points: ages 10-12 years (Time 1; N = 775, 71% male), 12-14 years (Time 2; n = 649, 72% male), 16 years (Time 3; n = 613, 73% male), and 22 years (Time 4; n = 425, 71% male)...
January 19, 2018: Journal of Clinical Child and Adolescent Psychology
https://www.readbyqxmd.com/read/29351362/analysis-of-the-effect-of-cyclophosphamide-and-methotrexate-on-chrysomya-megacephala-diptera-calliphoridae
#13
Ana Letícia Trivia, Carlos José de Carvalho Pinto
Forensic entomotoxicology investigates the effects of chemical substances in the development of scavenger insects and the reflection on estimating the minimum postmortem interval (PMI). To evaluate the impact of the chemotherapeutic drugs cyclophosphamide (CF) and methotrexate (MTX) on the postembryonic development of Chrysomya megacephala, controlled experiments were performed by rearing the larvae on spiked minced beef with different concentrations of these drugs. The results indicated that CF significantly decreased their developmental rate up to 28 h but had no significant effect on larval and adult sizes, survival rate, and sex ratio, whereas MTX decreased larval and adult sizes, survival rate, and there was a deviation in the expected sex ratio toward females in MTX-exposed larvae but had no significant impact on developmental rate...
January 19, 2018: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/29351205/influence-of-grapevine-cultivar-on-the-second-generations-of-lobesia-botrana-and-eupoecilia-ambiguella
#14
Francesco Pavan, Giorgio Stefanelli, Alberto Villani, Elena Cargnus
Grapevine cultivar can affect susceptibility to Lobesia botrana and Eupoecilia ambiguella with important implications on control strategies. A four-year study was carried out in north-eastern Italy on 10 cultivars (Cabernet Sauvignon, Carménère, Chardonnay, Merlot, Refosco dal Peduncolo Rosso, Rhine Riesling, Sauvignon Blanc, Terrano, Tocai Friulano and Verduzzo Friulano) grown in the same vineyard to assess whether the cultivar affects second-generation population levels of the two vine moths and L. botrana larval age composition...
January 19, 2018: Insects
https://www.readbyqxmd.com/read/29351141/an-exploration-of-emergency-physicians-attitudes-toward-patients-with-substance-use-disorder
#15
Cecelia Kathleen Mendiola, Giorgio Galetto, Michael Fingerhood
OBJECTIVES: Much is known about some healthcare professionals' attitudes toward patients with substance use disorders, but few studies have specifically looked at emergency department (ED) physicians. Individuals with substance use disorders are more likely to be people who chronically, frequently use the ED, and thus ED physicians are in a unique position to provide early identification and intervention for people struggling with addiction. The purpose of this study was to understand ED physicians' attitudes toward patients with substance use disorder with the aim of decreasing stigma and improving the care of ED patients with substance use disorder...
January 18, 2018: Journal of Addiction Medicine
https://www.readbyqxmd.com/read/29351138/the-effect-of-melatonin-upon-postacute-withdrawal-among-males-in-a-residential-treatment-program-m-paws-a-randomized-double-blind-placebo-controlled-trial
#16
Corry D Bondi, Khalid M Kamal, David A Johnson, Paula A Witt-Enderby, Vincent J Giannetti
OBJECTIVE: Assess the effect of melatonin (5 mg) compared with placebo as an adjuvant treatment along with current behavioral and pharmacotherapy for 28 days on weekly self-reported severity of anxiety, depression, stress, and sleep complaints, and also how sleep is affecting daily life in males 18 years of age and older in recovery from substance use at a residential program in south-western Pennsylvania. BACKGROUND: Individuals in recovery experience a variety of symptoms including, but are not limited to, anxiety, depression, sleep difficulties, and stress...
January 18, 2018: Journal of Addiction Medicine
https://www.readbyqxmd.com/read/29350833/platelets-kill-bacteria-by-bridging-innate-and-adaptive-immunity-via-pf4-and-fc%C3%AE-riia
#17
R Palankar, T P Kohler, K Krauel, J Wesche, S Hammerschmidt, A Greinacher
BACKGROUND: Activated platelets release the chemokine platelet factor 4 (PF4) stored in their granules. PF4 binds to polyanions (P) on bacteria, undergoes a conformational change and exposes neoepitopes. These neoepitopes induce production of anti-PF4/P antibodies. As PF4 binds to a variety of bacteria, anti-PF4/P IgG can bind and opsonize several bacterial species. OBJECTIVE: Here we investigated whether platelets are able to kill bacteria directly after recognizing anti-PF4/P IgG opsonized bacteria in the presence of PF4 via their FcγRIIA...
January 19, 2018: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/29350476/investigating-the-mechanisms-underlying-phytoprotection-by-plant-growth-promoting-rhizobacteria-in-spartina-densiflora-under-metal-stress
#18
K Paredes-Páliz, R Rodríguez-Vázquez, B Duarte, M A Caviedes, E Mateos-Naranjo, S Redondo-Gómez, Isabel Caçador, Ignacio D Rodríguez-Llorente, E Pajuelo
Pollution of coasts by toxic metals and metalloids is a worldwide problem for which phytoremediation using halophytes and associated microbiomes is getting relevance. Metal(loid)s excess is a constraint for plant establishment and development, and plant growth promoting rhizobacteria (PGPR) mitigate plant stress under these conditions. However, mechanisms underlying this effect remain elusive. In this paper, the effect of toxic metal(loid)s on the activity of ROS-scavenging enzymes in roots of the halophyte Spartina densiflora grown on real polluted sediments in a green house experiment, was investigated...
January 19, 2018: Plant Biology
https://www.readbyqxmd.com/read/29350472/the-chemistry-and-pharmacology-of-synthetic-cannabinoid-sdb-006-and-its-regioisomeric-fluorinated-and-methoxylated-analogues
#19
Samuel D Banister, Alexander Olson, Matthew Winchester, Jordyn Stuart, Amelia R Edington, Richard C Kevin, Mitchell Longworth, Marco Herrera, Mark Connor, Iain S McGregor, Roy R Gerona, Michael Kassiou
Synthetic cannabinoids are the largest and most structurally diverse class of new psychoactive substances, with manufacturers often using isomerism to evade detection and circumvent legal restriction. The regioisomeric methoxy- and fluorine-substituted analogues of SDB-006 (N-benzyl-1-pentyl-1H-indole-3-carboxamide) were synthesized and could not be differentiated by gas chromatography-mass spectrometry (GC-MS), but were distinguishable by liquid chromatography-quadrupole time-of-flight-MS (LC-QTOF-MS). In a fluorescence-based plate reader membrane potential assay, SDB-006 acted as a potent agonist at human cannabinoid receptors (CB1 EC50 = 19 nM)...
January 19, 2018: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29350430/on-the-impact-of-sample-size-on-lc50-estimation-in-acute-fish-toxicity-testing-is-n%C3%A2-%C3%A2-7-group-enough
#20
Greg J Carr, A John Bailer, Jane M Rawlings, Scott E Belanger
The fish acute toxicity test method is foundational to aquatic toxicity testing strategies, yet the literature lacks a concise sample size assessment. While various sources address sample size, historical precedent seems to play a larger role than objective measures. Here, a novel and comprehensive quantification of the effect of sample size on estimation of the LC50 is presented, covering a wide range of scenarios. The results put into perspective the practical differences across a range of sample sizes, from N = 5/concentration up to N = 23/concentration...
January 19, 2018: Environmental Toxicology and Chemistry
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