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https://www.readbyqxmd.com/read/28633104/transcriptional-and-cellular-effects-of-paracetamol-in-the-oyster-crassostrea-gigas
#1
M J Bebianno, A C P Mello, M A S Serrano, F Flores-Nunes, J J Mattos, F L Zacchi, C E Piazza, M N Siebert, R S Piazza, C H A M Gomes, C M R Melo, A C D Bainy
Acetaminophen (paracetamol) (PAR) is one of the most popular non-steroidal anti-inflammatory drugs (NSAIDs) with analgesic and antipyretic properties consumed worldwide and often detected in the aquatic environment. Due to the fact that PAR induces oxidative stress in mammals, the aim of this study was to evaluate if similar effects were observed in oysters Crassostrea gigas, given their economic and ecological importance and worldwide distribution. Oysters were exposed for 1, 4 and 7 days to two different sublethal PAR concentrations (0, 1 and 100μgL(-1))...
June 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28629813/recruitment-failure-of-scleractinian-corals-in-a-subtropical-marginal-environment-three-year-monitoring-in-a-hong-kong-marine-park
#2
Apple Pui Yi Chui, Put Ang
Coral recruitment was monitored for three years, using terracotta tiles, in two core coral areas in Tung Ping Chau Marine Park where coral coverage is one of the richest in Hong Kong. Results revealed an extremely low recruitment success of corals, with only 10 recruits recorded on 384 tile pairs, equivalent to 0.19 recruits m(-2)yr(-1) throughout the study period. Recruits of Platygyra acuta pre-seeded on tiles that were subsequently grown in situ experienced very high mortality following settlement, with average mortality of 80% within half a month and <0...
June 16, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28629124/microbial-diseases-of-bivalve-mollusks-infections-immunology-and-antimicrobial-defense
#3
REVIEW
Carla Zannella, Francesco Mosca, Francesca Mariani, Gianluigi Franci, Veronica Folliero, Marilena Galdiero, Pietro Giorgio Tiscar, Massimiliano Galdiero
A variety of bivalve mollusks (phylum Mollusca, class Bivalvia) constitute a prominent commodity in fisheries and aquacultures, but are also crucial in order to preserve our ecosystem's complexity and function. Bivalve mollusks, such as clams, mussels, oysters and scallops, are relevant bred species, and their global farming maintains a high incremental annual growth rate, representing a considerable proportion of the overall fishery activities. Bivalve mollusks are filter feeders; therefore by filtering a great quantity of water, they may bioaccumulate in their tissues a high number of microorganisms that can be considered infectious for humans and higher vertebrates...
June 17, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28624469/effects-of-protein-sources-on-growth-immunity-and-antioxidant-capacity-of-juvenile-pearl-oyster-pinctada-fucata-martensii
#4
Chuangye Yang, Ruijuan Hao, Yuewen Deng, Yongshan Liao, Qingheng Wang, Ruijiao Sun, Yu Jiao, Xiaodong Du
In this study, we formulated five diets, namely, P1, P2, P3, P4 and P5, with Chlorella sp. powder, Spirulina platensis powder, yeast powder, soybean meal and corn gluten, respectively, as major protein sources. A feeding experiment was designed to evaluate the effects of formulated diets on the growth performance, immunity and antioxidant and biomineralization capacity of juvenile pearl oyster (Pinctada fucata martensii). In the experiments, the five groups were separately fed with P1, P2, P3, P4 and P5 diets...
June 14, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28623690/candidate-cytochrome-p450-genes-for-ethoxyresorufin-o-deethylase-activity-in-oyster-crassostrea-gigas
#5
Marília Nardelli Siebert, Jacó Joaquim Mattos, Guilherme Toledo-Silva, Guilherme Razzera, Afonso Celso Dias Bainy
Vertebrate cytochrome P450 1 (CYP1) enzymes metabolize endogenous and xenobiotic compounds and usually demonstrate a substrate-inducible response. Ethoxyresorufin O-deethylase activity (EROD) is a common method to quantify CYP1 enzymes activity in these organisms. Despite the absence of this gene family in protostomes, CYP1-like genes were identified in several species, even though no evolutionary relationship has been established with the vertebrate CYP1 family. In the present study, EROD activity was evaluated in microsomal fraction of gills, digestive gland and mantle of Crassostrea gigas...
June 9, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28620858/toxicity-assessment-of-five-emerging-pollutants-alone-and-in-binary-or-ternary-mixtures-towards-three-aquatic-organisms
#6
Carole Di Poi, Katherine Costil, Valérie Bouchart, Marie-Pierre Halm-Lemeille
Despite a growing scientific attention on ecological impact of emerging pollutants (EPs) such as pharmaceuticals, personal care products, and pesticides, knowledge gaps remain regarding mixture toxicity and effects on aquatic organisms. Several EPs were screened in seawater (Normandy, France), and the ecotoxicity of five compounds, chosen on their occurrence in ecosystems and use worldwide, was assessed and were the biocides methylparaben (MP) and triclosan (TCS), a pesticide degradation product (AMPA), and the pharmaceuticals venlafaxine (VEN) and carbamazepine (CBZ)...
June 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28620168/dynamics-of-maternally-transferred-trace-elements-in-oyster-larvae-and-latent-growth-effects
#7
Nanyan Weng, Wen-Xiong Wang
Understanding the maternal transfer of contaminants and their potential effects has great implications for a valid ecological assessment of environmental pollution. However, relevant studies on marine bivalves are very limited. Here, we examined the maternal transfer of trace metals in populations of oyster Crassostrea hongkongensis with contrasting metal exposure histories. Elevated accumulation of trace metals was observed in eggs and larvae from contaminated sites, suggesting maternal transfer of multi-metals in natural oyster populations...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28619626/assessment-of-heavy-metal-and-petroleum-hydrocarbon-contamination-in-the-sultanate-of-oman-with-emphasis-on-harbours-marinas-terminals-and-ports
#8
Barry P Jupp, Scott W Fowler, Sergey Dobretsov, Henk van der Wiele, Ahmed Al-Ghafri
The assessment here includes data on levels of contaminants (petroleum hydrocarbons and heavy metals) in sediments and biomonitor organisms, including the eulittoral rock oyster Saccostrea cucullata and subtidal biomonitors, the barnacle Balanus trigonus and the antipatharian coral Antipathes sp., at harbours, marinas, terminals and large ports along the coastline of Oman. TBT levels in harbour and port sediments up to a maximum of 100ppb TBT dry weight are highlighted. Oysters contained concentrations up to 367ppm mg TPH/kg dry weight...
June 12, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28618821/low-intensity-ultrasound-activates-vestibular-otolith-organs-through-acoustic-radiation-force
#9
M M Iversen, D A Christensen, D L Parker, H A Holman, J Chen, M J Frerck, R D Rabbitt
The present study examined the efficacy of 5 MHz low-intensity focused ultrasound (LiFU) as a stimulus to remotely activate inner ear vestibular otolith organs. The otolith organs are the primary sensory apparati responsible for detecting orientation of the head relative to gravity and linear acceleration in three-dimensional space. These organs also respond to loud sounds and vibration of the temporal bone. The oyster toadfish, Opsanus tau, was used to facilitate unobstructed acoustic access to the otolith organs in vivo...
June 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28616177/the-effects-of-elevated-temperature-and-dissolved-%C3%AF-co2-on-a-marine-foundation-species
#10
Cori J Speights, Brian R Silliman, Michael W McCoy
Understanding how climate change and other environmental stressors will affect species is a fundamental concern of modern ecology. Indeed, numerous studies have documented how climate stressors affect species distributions and population persistence. However, relatively few studies have investigated how multiple climate stressors might affect species. In this study, we investigate the impacts of how two climate change factors affect an important foundation species. Specifically, we tested how ocean acidification from dissolution of CO 2 and increased sea surface temperatures affect multiple characteristics of juvenile eastern oysters (Crassostrea virginica)...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28615697/remodeling-of-the-cycling-transcriptome-of-the-oyster-crassostrea-gigas-by-the-harmful-algae-alexandrium-minutum
#11
Laura Payton, Mickael Perrigault, Claire Hoede, Jean-Charles Massabuau, Mohamedou Sow, Arnaud Huvet, Floriane Boullot, Caroline Fabioux, Hélène Hegaret, Damien Tran
As a marine organism, the oyster Crassostrea gigas inhabits a complex biotope governed by interactions between the moon and the sun cycles. We used next-generation sequencing to investigate temporal regulation of oysters under light/dark entrainment and the impact of harmful algal exposure. We found that ≈6% of the gills' transcriptome exhibits circadian expression, characterized by a nocturnal and bimodal pattern. Surprisingly, a higher number of ultradian transcripts were also detected under solely circadian entrainment...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28606863/transcriptome-analysis-of-the-immune-reaction-of-the-pearl-oyster-pinctada-fucata-to-xenograft-from-pinctada-maxima
#12
Jinfen Wei, Sigang Fan, Baosuo Liu, Bo Zhang, Jiaqi Su, Dahui Yu
The pearl oyster Pinctada maxima exhibits great difficulty to culture pearls through nuclear insertion with an allograft, but it is easy for P. fucata to culture pearls after allografting. If P. fucata could be used as a surrogate mother to culture P. maxima pearls, it would benefit the pearl culture industry of P. maxima. However, this is blocked by the immune rejection of P. fucata against P. maxima mantle grafts. In this study, the immune responses of P. fucata hemocyte to allograft and xenograft were investigated after transplantation by transcriptome analysis...
June 9, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28605836/brominated-flame-retardants-in-marine-environment-focused-on-aquaculture-area-occurrence-source-and-bioaccumulation
#13
Seo-Yeon Gu, Kalu Ibe Ekpeghere, Hee-Young Kim, In-Seok Lee, Da-Hye Kim, Gyojin Choo, Jeong-Eun Oh
Brominated flame retardants (BFRs), including polybrominated diphenyl ethers (PBDEs), tetrabromobisphenol A (TBBPA), and hexabromocyclododecanes (HBCDs), were investigated in bivalve (i.e., oyster (Crassostrea gigas) and mussel (Mytilus coruscus)), sediment, and seawater samples collected from aquaculture areas in South Korea to identify their occurrence, sources, and bioaccumulation. Among the studied chemicals, HBCDs predominated in bivalves and sediment, with concentrations of ND-67.52ng/g lipid weight and 3...
June 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28605591/influencing-mechanism-of-ocean-acidification-on-byssus-performance-in-the-pearl-oyster-pinctada-fucata
#14
Shiguo Li, Chuang Liu, Aibin Zhan, Liping Xie, Rongqing Zhang
The byssus is an important adhesive structure by which bivalves robustly adhere to underwater substrates. It is susceptible to carbon dioxide-driven ocean acidification (OA). Previous investigations have documented significant adverse effects of OA on the performance of byssal threads, but the mechanisms remain largely unknown. In this study, multiple approaches were employed to reveal the underlying mechanisms for the effects of OA on byssus production and mechanical properties in the pearl oyster Pinctada fucata...
June 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28605324/sulfation-of-the-extracellular-polysaccharide-produced-by-the-king-oyster-culinary-medicinal-mushroom-pleurotus-eryngii-agaricomycetes-and-its-antioxidant-properties-in-vitro
#15
Xuewei Jia, Chong Wang, Yanhong Bai, Jinwei Yu, Chunping Xu
Extracellular polysaccharide from Pleurotus eryngii was sulfated; the optimum reaction conditions used pyridine as the reaction solvent, a temperature of 80°C, and a reaction time of 90 minutes. The structure and antioxidant activity of the sulfated and original polysaccharides (designated as SF-1 and Fr-1, respectively) were investigated. The main functional groups of polysaccharides were determined by Fourier transform infrared, and the chain conformation was determined by size-exclusion chromatography with laser light scattering and viscometry...
2017: International Journal of Medicinal Mushrooms
https://www.readbyqxmd.com/read/28601578/impact-of-different-catalysis-supported-by-oyster-shells-on-the-pyrolysis-of-tyre-wastes-in-a-single-and-a-double-fixed-bed-reactor
#16
Sana Kordoghli, Besma Khiari, Maria Paraschiv, Fethi Zagrouba, Mohand Tazerout
The treatment and disposal of tyres from vehicles has long been of considerable environmental importance. Studies have been undertaken to reduce their environmental impact. In this study, an alternative gas was produced from automobile tyre wastes by the means of a controlled pyrolysis. To do so, a novel catalytic system was designed with the aim of increasing the rate of conversion and improving the quality of the pyrolysis products. This work aimed also to reduce the severity of the overall reactions, by using powder catalysts (MgO, Al2O3, CaCO3, and zeolite ZSM-5) uniformly distributed on two layers of oyster shells (OS) particles...
June 7, 2017: Waste Management
https://www.readbyqxmd.com/read/28596398/metagenomic-16s-rrna-sequencing-analysis-of-pacific-oyster-crassostrea-gigas-microbiota-from-the-puget-sound-region-in-the-united-states
#17
Zhen Li, Leyi Wang
This is the first study analyzing Pacific oyster microbiota in the Puget Sound estuarine system using a next-generation sequencing method. Taxonomic analysis indicated that Tenericutes, Chlamydiae, Proteobacteria, and Firmicutes were the most abundant phyla. Small numbers of operational taxonomic units (OTUs) belonging to the Vibrio genus were detected in all the oyster microbiome samples.
June 8, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28596395/complete-genome-sequence-of-vibrio-coralliilyticus-58-isolated-from-pacific-oyster-crassostrea-gigas-larvae
#18
Hyoun Joong Kim, Ji Hyung Kim, Jin Woo Jun, Sib Sankar Giri, Cheng Chi, Saekil Yun, Sang Guen Kim, Sang Wha Kim, Jeong Woo Kang, Dae Gwin Jeong, Se Chang Park
We report here the complete genome of Vibrio coralliilyticus strain 58, which was originally isolated from inactive Pacific oyster (Crassostrea gigas) larvae in Japan. The assembled genome consisted of two chromosomes and one plasmid. These data will provide valuable information and important insights into the biodiversity of this organism.
June 8, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28594821/dynamics-of-dna-methylomes-underlie-oyster-development
#19
Guillaume Riviere, Yan He, Samuele Tecchio, Elizabeth Crowell, Michaël Gras, Pascal Sourdaine, Ximing Guo, Pascal Favrel
DNA methylation is a critical epigenetic regulator of development in mammals and social insects, but its significance in development outside these groups is not understood. Here we investigated the genome-wide dynamics of DNA methylation in a mollusc model, the oyster Crassostrea gigas, from the egg to the completion of organogenesis. Large-scale methylation maps reveal that the oyster genome displays a succession of methylated and non methylated regions, which persist throughout development. Differentially methylated regions (DMRs) are strongly regulated during cleavage and metamorphosis...
June 8, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28594609/next-generation-sequencing-analysis-of-the-diversity-of-human-noroviruses-in-japanese-oysters
#20
Saiki Imamura, Hiromi Kanezashi, Tomoko Goshima, Mika Haruna, Tsukasa Okada, Nobuya Inagaki, Masashi Uema, Mamoru Noda, Keiko Akimoto
To obtain detailed information on the diversity of infectious norovirus in oysters (Crossostrea gigas), oysters obtained from fish producers at six different sites (sites A, B, C, D, E, and F) in Japan were analyzed once a month during the period spanning October 2015-February 2016. To avoid false-positive polymerase chain reaction (PCR) results derived from noninfectious virus particles, samples were pretreated with RNase before reverse transcription-PCR (RT-PCR). RT-PCR products were subjected to next-generation sequencing to identify norovirus genotypes in oysters...
June 8, 2017: Foodborne Pathogens and Disease
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