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https://www.readbyqxmd.com/read/28806552/exposure-of-engineered-nanoparticles-to-alexandrium-tamarense-dinophyceae-healthy-impacts-of-nanoparticles-via-toxin-producing-dinoflagellate
#1
Manlu Li, Daoyi Chen, Yang Liu, Chia Ying Chuang, Fanzhou Kong, Paul J Harrison, Xiaoshan Zhu, Yuelu Jiang
Human activities can enhance the frequency, intensity and occurrence of harmful algal blooms (HABs). Engineered nanoparticles (ENPs), contained in many materials, will inevitably enter coastal waters and thus cause unpredictable impacts on aquatic organisms. However, knowledge of the influence of ENPs on HAB species is still lacking. In this study, we examined the effects of titanium dioxide nanoparticles (nTiO2), zinc oxide nanoparticles (nZnO) and aluminum oxide nanoparticles (nAl2O3) on physiological changes and paralytic shellfish poisoning toxins (PSTs) production of Alexandrium tamarense...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28803409/comparative-16srdna-gene-based-microbiota-profiles-of-the-pacific-oyster-crassostrea-gigas-and-the-mediterranean-mussel-mytilus-galloprovincialis-from-a-shellfish-farm-ligurian-sea-italy
#2
Luigi Vezzulli, L Stagnaro, C Grande, G Tassistro, L Canesi, C Pruzzo
The pacific oyster Crassostrea gigas and the Mediterranean mussel Mytilus galloprovincialis are two widely farmed bivalve species which show contrasting behaviour in relation to microbial diseases, with C. gigas being more susceptible and M. galloprovincialis being generally resistant. In a recent study, we showed that different susceptibility to infection exhibited by these two bivalve species may depend on their different capability to kill invading pathogens (e.g., Vibrio spp.) through the action of haemolymph components...
August 12, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28802282/evolution-of-mediterranean-diets-and-cuisine-concepts-and-definitions
#3
Sue Radd-Vagenas, Antigone Kouris-Blazos, Maria Fiatarone Singh, Victoria M Flood
BACKGROUND AND OBJECTIVES: The Mediterranean diet has been demonstrated to provide a range of health benefits in observational and clinical trials and adopted by various dietary guidelines. However, a broad range of definitions exist impeding synthesis across trials. This review aims to provide a historical description of Mediterranean diets, from the ancient to the modern, to inform future educational and diet index tool development representing the 'traditional' Mediterranean diet. METHODS AND STUDY DESIGN: Nine databases were searched from inception to July 2015 to identify papers defining the Mediterranean diet...
2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28800414/global-distribution-of-perfluorochemicals-pfcs-in-potential-human-exposure-source-a-review
#4
REVIEW
Jun-Meng Jian, Ying Guo, Lixi Zeng, Liu Liang-Ying, Xingwen Lu, Fei Wang, Eddy Y Zeng
Human exposure to perfluorochemicals (PFCs) has attracted mounting attention due to their potential harmful effects. Breathing, dietary intake, and drinking are believed to be the main routes for PFC entering into human body. Thus, we profiled PFC compositions and concentrations in indoor air and dust, food, and drinking water with detailed analysis of literature data published after 2010. Concentrations of PFCs in air and dust samples collected from home, office, and vehicle were outlined. The results showed that neutral PFCs (e...
August 8, 2017: Environment International
https://www.readbyqxmd.com/read/28797318/single-laboratory-validation-of-the-neogen-qualitative-lateral-flow-immunoassay-for-the-detection-of-paralytic-shellfish-toxins-in-mussels-and-oysters
#5
Alison R Turnbull, Jessica Y C Tan, Sarah C Ugalde, Gustaaf M Hallegraeff, Katrina Campbell, D Tim Harwood, Juan José Dorantes-Aranda
Detection of paralytic shellfish toxins (PSTs) in bivalve shellfish by analytical methods is complicated and costly, requiring specific expertise and equipment. Following extensive blooms of Alexandrium tamarense Group 1 in Tasmania, Australia, an investigation was made into commercially available screening test kits suitable for use with the toxin profiles found in affected bivalves. The qualitative Neogen rapid test kit, with a modified protocol to convert gonyautoxins GTX1&4 and GTX2&3 into neosaxitoxin and saxitoxin (STX), respectively, with higher cross-reactivities, was the best fit-for-purpose...
August 10, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28793388/morphological-molecular-and-toxin-analysis-of-field-populations-of-alexandrium-genus-from-the-argentina-sea
#6
Elena Fabro, Gastón O Almandoz, Martha Ferrario, Uwe John, Urban Tillmann, Kerstin Toebe, Bernd Krock, Allan Cembella
In the Argentine Sea, blooms of toxigenic dinoflagellates of the Alexandrium tamarense species complex have led to fish and bird mortalities and human deaths as a consequence of paralytic shellfish poisoning (PSP). Yet little is known about the occurrence of other toxigenic species of the genus Alexandrium, or of their toxin composition beyond coastal waters. The distribution of Alexandrium species and related toxins in the Argentine Sea was determined by sampling surface waters on an oceanographic expedition during austral spring from ~39 to 48º S...
August 9, 2017: Journal of Phycology
https://www.readbyqxmd.com/read/28775219/assessment-of-dietary-food-and-nutrient-intake-and-bone-density-in-children-with-eczema
#7
T F Leung, S S Wang, F Y Kwok, L W Leung, C M Chow, E K Hon
INTRODUCTION: Dietary restrictions are common among patients with eczema, and such practice may lead to diminished bone mineral density. This study investigated dietary intake and bone mineral density in Hong Kong Chinese children with eczema. METHODS: This cross-sectional and observational study was conducted in a university-affiliated teaching hospital in Hong Kong. Chinese children aged below 18 years with physician-diagnosed eczema were recruited from our paediatric allergy and dermatology clinics over a 6-month period in 2012...
August 4, 2017: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
https://www.readbyqxmd.com/read/28755714/pseudo-nitzschia-simulans-sp-nov-bacillariophyceae-the-first-domoic-acid-producer-from-chinese-waters
#8
Yang Li, Chun Xiu Huang, Guo Shuang Xu, Nina Lundholm, Sing Tung Teng, Haiyan Wu, Zhijun Tan
The genus Pseudo-nitzschia has attracted attention because of production of the toxin, domoic acid (DA), causing Amnesic Shellfish Poisoning (ASP). Pseudo-nitzschia blooms occur frequently in Chinese coastal waters, and DA has been detected in several marine organisms, but so far no Pseudo-nitzschia strains from Chinese waters have been shown to produce DA. In this study, monoclonal Pseudo-nitzschia strains were established from Chinese coastal waters and examined using light microscopy, electron microscopy and molecular markers...
July 2017: Harmful Algae
https://www.readbyqxmd.com/read/28750330/modelling-the-transport-and-decay-processes-of-microbial-tracers-in-a-macro-tidal-estuary
#9
Amyrhul Abu-Bakar, Reza Ahmadian, Roger A Falconer
The Loughor Estuary is a macro-tidal coastal basin, located along the Bristol Channel, in the South West of the U.K. The maximum spring tidal range in the estuary is up to 7.5 m, near Burry Port Harbour. This estuarine region can experience severe coastal flooding during high spring tides, including extreme flooding of the intertidal saltmarshes at Llanrhidian, as well as the lower industrial and residential areas at Llanelli and Gowerton. The water quality of this estuarine basin needs to comply with the designated standards for safe recreational bathing and shellfish harvesting industries...
July 3, 2017: Water Research
https://www.readbyqxmd.com/read/28747477/oyster-reefs-as-carbon-sources-and-sinks
#10
F Joel Fodrie, Antonio B Rodriguez, Rachel K Gittman, Jonathan H Grabowski, Niels L Lindquist, Charles H Peterson, Michael F Piehler, Justin T Ridge
Carbon burial is increasingly valued as a service provided by threatened vegetated coastal habitats. Similarly, shellfish reefs contain significant pools of carbon and are globally endangered, yet considerable uncertainty remains regarding shellfish reefs' role as sources (+) or sinks (-) of atmospheric CO2 While CO2 release is a by-product of carbonate shell production (then burial), shellfish also facilitate atmospheric-CO2 drawdown via filtration and rapid biodeposition of carbon-fixing primary producers...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28737704/toxicity-at-the-edge-of-life-a-review-on-cyanobacterial-toxins-from-extreme-environments
#11
REVIEW
Samuel Cirés, María Cristina Casero, Antonio Quesada
Cyanotoxins are secondary metabolites produced by cyanobacteria, of varied chemical nature and toxic effects. Although cyanobacteria thrive in all kinds of ecosystems on Earth even under very harsh conditions, current knowledge on cyanotoxin distribution is almost restricted to freshwaters from temperate latitudes. In this review, we bring to the forefront the presence of cyanotoxins in extreme environments. Cyanotoxins have been reported especially in polar deserts (both from the Arctic and Antarctica) and alkaline lakes, but also in hot deserts, hypersaline environments, and hot springs...
July 24, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28734861/low-food-allergy-prevalence-despite-delayed-introduction-of-allergenic-foods-data-from-the-gusto-cohort
#12
Elizabeth Huiwen Tham, Bee Wah Lee, Yiong Huak Chan, Evelyn Xiu Ling Loo, Jia Ying Toh, Anne Goh, Oon Hoe Teoh, Fabian Yap, Kok Hian Tan, Keith M Godfrey, Mary Foong Fong Chong, Hugo P S Van Bever, Yap Seng Chong, Lynette Pei-Chi Shek
BACKGROUND: There is mounting evidence that early introduction of allergenic food decreases the risk of food allergy development, especially in high-risk infants with eczema. However, there is a lack of data to suggest whether this association holds true in Asian populations. OBJECTIVE: To investigate the relationship between the timing of introduction of allergenic foods and food allergy outcomes in infants in the Growing Up in Singapore Towards healthy Outcomes (GUSTO) study...
July 19, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28734856/four-cases-of-delayed-onset-systemic-reaction-to-shellfish
#13
Michelle Fox Huffaker, Sean Austin McGhee
No abstract text is available yet for this article.
July 19, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28730312/hydrophilic-interaction-liquid-chromatography-tandem-mass-spectrometry-for-quantitation-of-paralytic-shellfish-toxins-validation-and-application-to-reference-materials
#14
Krista M Thomas, Daniel G Beach, Kelley L Reeves, Ryan S Gibbs, Elliott S Kerrin, Pearse McCarron, Michael A Quilliam
Paralytic shellfish toxins (PSTs) are potent neurotoxins produced by marine dinoflagellates that are responsible for paralytic shellfish poisoning (PSP) in humans. This work highlights our ongoing efforts to develop quantitative methods for PSTs using hydrophilic interaction liquid chromatography-tandem mass spectrometry (HILIC-MS/MS). Compared with the commonly used method of liquid chromatography with post-column oxidation and fluorescence detection (LC-ox-FLD), HILIC-MS/MS has the potential of being more robust, sensitive and straightforward to operate, and provides unequivocal confirmation of toxin identity...
July 20, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28726749/ladder-shaped-ion-channel-ligands-current-state-of-knowledge
#15
REVIEW
Yuri B Shmukler, Denis A Nikishin
Ciguatoxins (CTX) and brevetoxins (BTX) are polycyclic ethereal compounds biosynthesized by the worldwide distributed planktonic and epibenthic dinoflagellates of Gambierdiscus and Karenia genera, correspondingly. Ciguatera, evoked by CTXs, is a type of ichthyosarcotoxism, which involves a variety of gastrointestinal and neurological symptoms, while BTXs cause so-called neurotoxic shellfish poisoning. Both types of toxins are reviewed together because of similar mechanisms of their action. These are the only molecules known to activate voltage-sensitive Na⁺-channels in mammals through a specific interaction with site 5 of its α-subunit and may compete for it, which results in an increase in neuronal excitability, neurotransmitter release and impairment of synaptic vesicle recycling...
July 20, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28724971/computational-design-of-a-symmetrical-%C3%AE-trefoil-lectin-with-cancer-cell-binding-activity
#16
Daiki Terada, Arnout R D Voet, Hiroki Noguchi, Kenichi Kamata, Mio Ohki, Christine Addy, Yuki Fujii, Daiki Yamamoto, Yasuhiro Ozeki, Jeremy R H Tame, Kam Y J Zhang
Computational protein design has advanced very rapidly over the last decade, but there remain few examples of artificial proteins with direct medical applications. This study describes a new artificial β-trefoil lectin that recognises Burkitt's lymphoma cells, and which was designed with the intention of finding a basis for novel cancer treatments or diagnostics. The new protein, called "Mitsuba", is based on the structure of the natural shellfish lectin MytiLec-1, a member of a small lectin family that uses unique sequence motifs to bind α-D-galactose...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28718096/contamination-status-of-arsenic-in-fish-and-shellfish-from-three-river-basins-in-ghana
#17
Francis Gbogbo, Samuel Darlynton Otoo, Obed Asomaning, Robert Quaye Huago
Fish and shellfish are regularly consumed and sold in Ghana, yet studies on arsenic pollution in Ghana are limited largely to ground water. This study evaluated arsenic concentrations in seven species of shellfish and 10 species of fish inhabiting the mouth of Ankobra, Densu and Volta basins in Ghana and assessed the public health implications. Arsenic levels varied from 0.2 to 2.2 mg L(-1) in the three rivers and were higher than WHO recommended values of 10 μg L(-1) for drinking water. Except for Periophthalmus sp...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28713794/correction-occurrence-of-harmful-algal-species-and-shellfish-toxicity-in-sardinia-italy
#18
Anna Maria Bazzoni, Alessandro Graziano Mudadu, Giuseppa Lorenzoni, Igor Arras, Antonella Lugliè, Barbara Vivaldi, Valentina Ciccotelli, Giovanna Sanna, Giuseppe Tedde, Salvatore Ledda, Enrico Alesso, Edoardo Marongiu, Sebastiano Virgilio
[This corrects the article on p. 6095 in vol. 5, PMID: 28058244.].
April 13, 2017: Italian Journal of Food Safety
https://www.readbyqxmd.com/read/28711392/corrigendum-to-dietary-lactobacillus-acidophilus-modulated-skin-mucus-protein-profile-immune-and-appetite-gene-expression-in-gold-fish-carassius-auratus-gibelio-fish-shellfish-immunol-59c-2016-149-154
#19
Marjan Hosseini, Hamed Kolangi Miandare, Ali Shabani, Seyed Hossein Hoseinifar, Peyman Yarahmadi
No abstract text is available yet for this article.
July 12, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28711010/the-paralytic-shellfish-toxin-saxitoxin-enters-the-cytoplasm-and-induces-apoptosis-of-oyster-immune-cells-through-a-caspase-dependent-pathway
#20
Celina Abi-Khalil, Darren S Finkelstein, Genevieve Conejero, Justin Du Bois, Delphine Destoumieux-Garzon, Jean Luc Rolland
Exposure of the toxin-producing dinoflagellate Alexandrium catenella (A. catenella) was previously demonstrated to cause apoptosis of hemocytes in the oyster species Crassostrea gigas. In this work, a coumarin-labeled saxitoxin appeared to spread throughout the cytoplasm of the hemocytes. PSTs, including saxitoxin, were also shown to be directly responsible for inducing apoptosis in hemocytes, a process dependent on caspase activation and independent of reactive oxygen species (ROS) production. A series of in vitro labelling and microscopy experiments revealed that STX and analogs there of induced nuclear condensation, phosphatidylserine exposure, membrane permeability, and DNA fragmentation of hemocytes...
September 2017: Aquatic Toxicology
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