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https://www.readbyqxmd.com/read/28535597/variation-and-accumulation-patterns-of-poly-and-perfluoroalkyl-substances-pfas-in-european-perch-perca-fluviatilis-across-a-gradient-of-pristine-swedish-lakes
#1
Staffan Åkerblom, Nesrin Negm, Pianpian Wu, Kevin Bishop, Lutz Ahrens
This study assessed variations in the concentrations of poly- and perfluoroalkyl substances (PFAS) in European perch (Perca fluviatilis) in Swedish lakes and the extent to which fish size, age and indicators of fish trophic ecology (δ(15)N and δ(13)C) correlate with the sum of individual PFAS concentrations (ΣPFAS). Fish muscle tissue samples (n=80) were taken from six lakes across Sweden and analysed using solid-liquid extraction followed by liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS)...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28535381/the-evolution-of-fangs-venom-and-mimicry-systems-in-blenny-fishes
#2
Nicholas R Casewell, Jeroen C Visser, Kate Baumann, James Dobson, Han Han, Sanjaya Kuruppu, Michael Morgan, Anthony Romilio, Vera Weisbecker, Karine Mardon, Syed A Ali, Jordan Debono, Ivan Koludarov, Ivo Que, Gregory C Bird, Gavan M Cooke, Amanda Nouwens, Wayne C Hodgson, Simon C Wagstaff, Karen L Cheney, Irina Vetter, Louise van der Weerd, Michael K Richardson, Bryan G Fry
No abstract text is available yet for this article.
May 22, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28535299/analysis-of-bacterial-metagenomes-from-the-southwestern-gulf-of-mexico-for-pathogens-detection
#3
Wendy Escobedo-Hinojosa, Liliana Pardo-López
Little is known about the diversity of bacteria in the Southwestern Gulf of Mexico. The aim of the study illustrated in this perspective was to search for the presence of bacterial pathogens in this ecosystem, using metagenomic data recently generated by the Mexican research group known as the Gulf of Mexico Research Consortium. Several genera of bacteria annotated as pathogens were detected in water and sediment marine samples. As expected, native and ubiquitous pathogenic bacteria genera such as Burkolderia, Halomonas, Pseudomonas, Shewanella, and Vibrio were highly represented...
May 23, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28535200/the-draft-genome-of-blunt-snout-bream-megalobrama-amblycephala-reveals-the-development-of-intermuscular-bone-and-adaptation-to-herbivorous-diet
#4
Han Liu, Chunhai Chen, Zexia Gao, Jiumeng Min, Yongming Gu, Jianbo Jian, Xiewu Jiang, Huimin Cai, Ingo Ebersberger, Meng Xu, Xinhui Zhang, Jianwei Chen, Wei Luo, Boxiang Chen, Junhui Chen, Hong Liu, Jiang Li, Ruifang Lai, Mingzhou Bai, Jin Wei, Shaokui Yi, Huanling Wang, Xiaojuan Cao, Xiaoyun Zhou, Yuhua Zhao, Kaijian Wei, Ruibin Yang, Bingnan Liu, Shancen Zhao, Xiaodong Fang, Manfred Schartl, Xueqiao Qian, Weimin Wang
Background: The blunt snout bream, Megalobrama amblycephala , is the economically most important cyprinid fish species. As an herbivore, it can be grown by eco-friendly and resource-conserving aquaculture. However, the large number of intermuscular bones in the trunk musculature is adverse to fish meat processing and consumption. Results: As a first towards optimizing this aquatic livestock, we present a 1.116-Gb draft genome of M. amblycephala , with 779.54 Mb anchored on 24 linkage groups...
May 23, 2017: GigaScience
https://www.readbyqxmd.com/read/28535164/meat-dietary-heme-iron-and-risk-of-type-2-diabetes-the-singapore-chinese-health-study
#5
Mohammad Talaei, Ye-Li Wang, Jian-Min Yuan, An Pan, Woon-Puay Koh
We evaluated the relations of red meat, poultry, fish and shellfish, as well as heme iron intake, with risk of type 2 diabetes (T2D).The Singapore Chinese Health Study is a population-based cohort that recruited 63,257 Chinese adults aged 45-74 years from 1993 to 1998. Usual diet was evaluated by a validated 165-item semi-quantitative food-frequency questionnaire at recruitment. Physician-diagnosed T2D was self-reported during two follow-up interviews in 1999-2004 and 2006-2010. During a mean follow-up of 10...
May 23, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28535116/is-mannitol-the-treatment-of-choice-for-patients-with-ciguatera-fish-poisoning
#6
Michael E Mullins, Robert S Hoffman
CONTEXT: Ciguatera fish poisoning arises primarily from consumption of carnivorous reef fish caught in tropical and sub-tropical waters. Ciguatoxins, a class of tasteless, heat-stable, polycyclic toxins produced by dinoflagellates, accumulate through the food chain and concentrate in various carnivorous fish, such as groupers, barracudas, wrasses, amberjack, kingfishes, and eels. Characteristics of ciguatera fish poisoning include early nausea, vomiting, and diarrhea in the first one to two days post ingestion, followed by the appearance of sensory disturbances...
May 23, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28534830/calculation-of-haem-iron-intake-and-its-role-in-the-development-of-iron-deficiency-in-young-women-from-the-australian-longitudinal-study-on-women-s-health
#7
Angela J Reeves, Mark A McEvoy, Lesley K MacDonald-Wicks, Daniel Barker, John Attia, Allison M Hodge, Amanda J Patterson
Total iron intake is not strongly associated with iron stores, but haem iron intake may be more predictive. Haem iron is not available in most nutrient databases, so experimentally determined haem contents were applied to an Australian Food Frequency Questionnaire (FFQ) to estimate haem iron intake in a representative sample of young women (25-30 years). The association between dietary haem iron intakes and incident self-reported diagnosed iron deficiency over six years of follow-up was examined. Haem iron contents for Australian red meats, fish, and poultry were applied to haem-containing foods in the Dietary Questionnaire for Epidemiological Studies V2 (DQESv2) FFQ...
May 19, 2017: Nutrients
https://www.readbyqxmd.com/read/28534491/structural-basis-for-perception-of-diverse-chemical-substances-by-t1r-taste-receptors
#8
Nipawan Nuemket, Norihisa Yasui, Yuko Kusakabe, Yukiyo Nomura, Nanako Atsumi, Shuji Akiyama, Eriko Nango, Yukinari Kato, Mika K Kaneko, Junichi Takagi, Maiko Hosotani, Atsuko Yamashita
The taste receptor type 1 (T1r) family perceives 'palatable' tastes. These receptors function as T1r2-T1r3 and T1r1-T1r3 heterodimers to recognize a wide array of sweet and umami (savory) tastes in sugars and amino acids. Nonetheless, it is unclear how diverse tastes are recognized by so few receptors. Here we present crystal structures of the extracellular ligand-binding domains (LBDs), the taste recognition regions of the fish T1r2-T1r3 heterodimer, bound to different amino acids. The ligand-binding pocket in T1r2LBD is rich in aromatic residues, spacious and accommodates hydrated percepts...
May 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28534468/effect-of-wearing-a-telemetry-jacket-on-behavioral-and-physiologic-parameters-of-dogs-in-the-open%C3%A2-field-test
#9
Richard E Fish, Melanie L Foster, Margaret E Gruen, Barbara L Sherman, David C Dorman
Safety pharmacology studies in dogs often integrate behavioral assessments made using video recording with physiologicmeasurements collected by telemetry. However, whether merely wearing the telemetry vest affects canine behavior and otherparameters has not been evaluated. This pilot study assessed the effect of a telemetry vest on behavioral and physiologic responses to an environmental stressor, the sounds of a thunderstorm, in Labrador retrievers. Dogs were assigned to one of 2 experimental groups (Vest and No-Vest, n = 8 dogs per group) by using a matched pairs design, with a previously determined,sound-associated anxiety score as the blocking variable...
May 22, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28534458/association-between-dietary-patterns-and-adiposity-from-4-to-7-years-of-age
#10
Catarina Durão, Milton Severo, Andreia Oliveira, Pedro Moreira, António Guerra, Henrique Barros, Carla Lopes
OBJECTIVE: The present study aimed to evaluate the association of 4-year-old children's dietary patterns with adiposity at 7 years, according to child's sex, using a conceptual model. DESIGN: Prospective cohort study. Diet was assessed using an FFQ. Age- and sex-specific BMI standard deviation scores (Z-scores) were defined according to the WHO. Fat mass percentage (FM%), fat mass index (FMI) and waist-to-height ratio (WHtR) were also considered, converted into Z-scores using sex-specific means and standard deviations of the current sample...
May 23, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28534152/cerebrospinal-fluid-dissemination-of-high-grade-gliomas-following-boron-neutron-capture-therapy-occurs-more-frequently-in-the-small-cell-subtype-of-idh1-r132h-mutation-negative-glioblastoma
#11
Natsuko Kondo, Rolf F Barth, Shin-Ichi Miyatake, Shinji Kawabata, Minoru Suzuki, Koji Ono, Norman L Lehman
We have used boron neutron capture therapy (BNCT) to treat patients in Japan with newly diagnosed or recurrent high-grade gliomas and have observed a significant increase in median survival time following BNCT. Although cerebrospinal fluid dissemination (CSFD) is not usually seen with the current standard therapy of patients with glioblastoma (GBM), here we report that subarachnoid or intraventricular CSFD was the most frequent cause of death for a cohort of our patients with high-grade gliomas who had been treated with BNCT...
May 22, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28534101/evaluation-of-alk-gene-rearrangement-in-central-nervous-system-metastases-of-non-small-cell-lung-cancer-using-two-step-rt-pcr-technique
#12
M Nicoś, P Krawczyk, K Wojas-Krawczyk, A Bożyk, B Jarosz, M Sawicki, T Trojanowski, J Milanowski
PURPOSE: RT-PCR technique has showed a promising value as pre-screening method for detection of mRNA containing abnormal ALK sequences, but its sensitivity and specificity is still discussable. Previously, we determined the incidence of ALK rearrangement in CNS metastases of NSCLC using IHC and FISH methods. MATERIALS: We evaluated ALK gene rearrangement using two-step RT-PCR method with EML4-ALK Fusion Gene Detection Kit (Entrogen, USA). The studied group included 145 patients (45 females, 100 males) with CNS metastases of NSCLC and was heterogeneous in terms of histology and smoking status...
May 22, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28534072/genotoxic-assessment-of-some-inorganic-compounds-in-desert-pupfish-cyprinodon-macularius-in-the-evaporation-pond-from-a-geothermal-plant
#13
Miguel Flores-Galván, Evarista Arellano-García, Gorgonio Ruiz-Campos, Luis Walter Daesslé
The frequency of micro nucleated erythrocytes in peripheral blood of the desert pupfish (Cyprinodon macularius) from a geothermal effluent pond is determined and compared to organisms kept in an aquarium. The frequency of micronucleated erythrocytes found in pupfish from the geothermal pond is 2.75 (±2.09) and only 0.44 (±0.52) in captivity organisms. Dissolved As in the ponds doubles the 340 µg L(-1) US-EPA acute quality criteria for aquatic life and Hg equals the 1.77 µg L(-1) chronic criteria. The organisms with high MNE also have significantly high Se, As and Hg concentrations in muscle and liver...
May 22, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28534051/cooling-strategies-for-brazilian-flounder-paralichthys-orbignyanus-embryos
#14
A S Varela, T F Cardoso, E Fernandes E Silva, K L Goularte, M H Okamoto, L A Sampaio, R D Jardim, C D Corcini
BACKGROUND: Paralichthys orbignyanus is the species of the greatest potential for marine and estuarine fish farming in southern Brazil. Consequently, embryo cryopreservation becomes an important tool for increasing their production. OBJECTIVE: To evaluate the effects of cooling protocols on the viability of embryos of P. orbignyanus at two stages of development (neurula and early differentiation of the tail). MATERIALS AND METHODS: Control embryos were maintained at 23 degree C and treated embryos were cooled to 15 degree C, 10 degree C and 5 degree C at rapid, moderate and slow cooling rates...
March 2017: Cryo Letters
https://www.readbyqxmd.com/read/28534042/loss-of-the-habenula-intrinsic-neuromodulator-kisspeptin1-affects-learning-in-larval-zebrafish
#15
Charlotte Lupton, Mohini Sengupta, Ruey-Kuang Cheng, Joanne Chia, Vatsala Thirumalai, Suresh Jesuthasan
Learning how to actively avoid a predictable threat involves two steps: recognizing the cue that predicts upcoming punishment and learning a behavioral response that will lead to avoidance. In zebrafish, ventral habenula (vHb) neurons have been proposed to participate in both steps by encoding the expected aversiveness of a stimulus. vHb neurons increase their firing rate as expectation of punishment grows but reduce their activity as avoidance learning occurs. This leads to changes in the activity of raphe neurons, which are downstream of the vHb, during learning...
May 2017: ENeuro
https://www.readbyqxmd.com/read/28533966/microbiome-patterns-across-the-gastrointestinal-tract-of-the-rabbitfish-siganus-fuscescens
#16
Shaun Nielsen, Jackson Wilkes Walburn, Adriana Vergés, Torsten Thomas, Suhelen Egan
Most of our knowledge regarding the biodiversity of gut microbes comes from terrestrial organisms or marine species of economic value, with less emphasis on ecologically important species. Here we investigate the bacterial composition associated with the gut of Siganus fuscescens, a rabbitfish that plays an important ecological role in coastal ecosystems by consuming seaweeds. Members of Firmicutes, Bacteroidetes and delta-Proteobacteria were among the dominant taxa across samples taken from the contents and the walls (sites) of the midgut and hindgut (location)...
2017: PeerJ
https://www.readbyqxmd.com/read/28533820/medip-seq-and-ncpg-analyses-illuminate-sexually-dimorphic-methylation-of-gonadal-development-genes-with-high-historic-methylation-in-turtle-hatchlings-with-temperature-dependent-sex-determination
#17
Srihari Radhakrishnan, Robert Literman, Beatriz Mizoguchi, Nicole Valenzuela
BACKGROUND: DNA methylation alters gene expression but not DNA sequence and mediates some cases of phenotypic plasticity. Temperature-dependent sex determination (TSD) epitomizes phenotypic plasticity where environmental temperature drives embryonic sexual fate, as occurs commonly in turtles. Importantly, the temperature-specific transcription of two genes underlying gonadal differentiation is known to be induced by differential methylation in TSD fish, turtle and alligator. Yet, how extensive is the link between DNA methylation and TSD remains unclear...
2017: Epigenetics & Chromatin
https://www.readbyqxmd.com/read/28533691/microbiome-disruption-and-recovery-in-the-fish-gambusia-affinis-following-exposure-to-broad-spectrum-antibiotic
#18
Jeanette M Carlson, Annie B Leonard, Embriette R Hyde, Joseph F Petrosino, Todd P Primm
Antibiotics are a relatively common disturbance to the normal microbiota of humans and agricultural animals, sometimes resulting in severe side effects such as antibiotic-associated enterocolitis. Gambusia affinis was used as a vertebrate model for effects of a broad-spectrum antibiotic, rifampicin, on the skin and gut mucosal microbiomes. The fish were exposed to the antibiotic in the water column for 1 week, and then monitored during recovery. As observed via culture, viable counts from the skin microbiome dropped strongly yet returned to pretreatment levels by 1...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/28533562/accelerating-tropicalization-and-the-transformation-of-temperate-seagrass-meadows
#19
Glenn A Hyndes, Kenneth L Heck, Adriana Vergés, Euan S Harvey, Gary A Kendrick, Paul S Lavery, Kathryn McMahon, Robert J Orth, Alan Pearce, Mathew Vanderklift, Thomas Wernberg, Scott Whiting, Shaun Wilson
Climate-driven changes are altering production and functioning of biotic assemblages in terrestrial and aquatic environments. In temperate coastal waters, rising sea temperatures, warm water anomalies and poleward shifts in the distribution of tropical herbivores have had a detrimental effect on algal forests. We develop generalized scenarios of this form of tropicalization and its potential effects on the structure and functioning of globally significant and threatened seagrass ecosystems, through poleward shifts in tropical seagrasses and herbivores...
November 1, 2016: Bioscience
https://www.readbyqxmd.com/read/28533556/evolution-of-th2-responses-characterization-of-il-4-13-in-sea-bass-dicentrarchus-labrax-l-and-studies-of-expression-and-biological-activity
#20
Valentina Stocchi, Tiehui Wang, Elisa Randelli, Massimo Mazzini, Marco Gerdol, Alberto Pallavicini, Chris J Secombes, Giuseppe Scapigliati, Francesco Buonocore
Th2 immunity is a primary host defence against metazoan pathogens and two of the important cytokines involved in this immune response in mammals are IL-4 and IL-13. Recently the origin and evolution of Th2 immune responses have been investigated in fish where a molecule with relatedness to both IL-4 and IL-13 is present, termed IL-4/13. Different IL-4/13 paralogues (IL-4/13 A and IL-4/13B) exist in teleost fish. In this paper, we have focused on the IL-4/13 isoforms found in the European sea bass (Dicentrarchus labrax L...
May 22, 2017: Scientific Reports
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