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https://www.readbyqxmd.com/read/28625873/an-approach-to-the-study-of-the-immunity-functions-of-bivalve-haemocytes-physiology-and-molecular-aspects
#1
REVIEW
Mario Alberto Burgos-Aceves, Caterina Faggio
The Mediterranean mussel Mytilus galloprovincialis is an ecologically and economically important species. It has been used in programs of monitoring of pollutions, since it is sessile organism that is capable of accumulating pollutants in tissues through filter feeding. Due to an increase of pollutants in the environment, marine mussels present physiological alterations that compromise their innate immune system, which can latter lead to opportunistic diseases. The haemocytes are the cells in charge of the immune response in the Mediterranean mussel and in other mollusks...
June 15, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28623788/ssris-antidepressants-in-marine-mussels-from-atlantic-coastal-areas-and-human-risk-assessment
#2
Liliana J G Silva, André M P T Pereira, Helena Rodrigues, Leonor M Meisel, Celeste M Lino, Angelina Pena
Selective serotonin reuptake inhibitors (SSRIs) are among the most prescribed antidepressants nation and worldwide. Their presence in the aquatic environment is known, causing growing pressures in heavily populated coastal areas. For instance, disruption of invertebrate endocrine systems has been described. Since discrete seawater sampling may not be suitable to evaluate such environmental risk, we aimed to assess SSRIs and metabolites in wild Mytilus galloprovincialis, and assess risk to human health. A total of 1225 mussels were sampled during one year along the Portuguese Atlantic coast...
June 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28622846/comparison-between-resident-and-caged-mussels-polycyclic-aromatic-hydrocarbon-accumulation-and-biological-response
#3
Marin Glad, Nevenka Bihari, Željko Jakšić, Maja Fafanđel
The aim of this study was to compare the capability of "passive" and "active" biomonitoring to determine the environmental pressure. For this purpose, PAHs content and several biological responses in resident and caged mussels (Mytilus galloprovincialis) at five sampling sites (Rijeka Bay, Adriatic Sea) were analsed. Resident mussels were found better in reflecting the level of PAH loads at particular sites while only caged mussels could detect input of HMW PAHs. When data of each investigated parameter were compared separately, the majority of differences between resident and caged mussels' results were site-specific...
June 8, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28616979/proposed-biotransformation-pathways-for-new-metabolites-of-paralytic-shellfish-toxins-based-on-field-and-experimental-mussel-samples
#4
Ling Ding, Jiangbing Qiu, Aifeng Li
A seafood poisoning event occurred in Qinhuangdao City, China, in April 2016. Subsequently, the causative mussels (Mytilus galloprovincialis) were harvested and analyzed to reveal a high concentration (~10,758 μg STX eq. kg-1) of paralytic shellfish toxins (PST), including GTX1/4 and GTX2/3, as well as new metabolites 11-hydroxy-STX (M2), 11,11-dihydroxy-STX (M4), open-ring 11,11-dihydroxy-STX (M6), 11-hydroxy-NEO (M8), and 11,11-dihydroxy-NEO (M10). In order to understand the origin and biotransformation pathways of these new metabolites, uncontaminated mussels (M...
June 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28605836/brominated-flame-retardants-in-marine-environment-focused-on-aquaculture-area-occurrence-source-and-bioaccumulation
#5
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/28604134/impact-of-exposure-time-particle-size-and-uptake-pathway-on-silver-nanoparticle-effects-on-circulating-immune-cells-in-mytilus-galloprovincialis
#6
Younes Bouallegui, Ridha Ben Younes, Faten Turki, Ridha Oueslati
Nanomaterials have increasingly emerged as potential pollutants to aquatic organisms. Nanomaterials are known to be taken up by hemocytes of marine invertebrates including Mytilus galloprovincialis. Indeed, assessments of hemocyte-related parameters are a valuable tool in the determination of potentials for nanoparticle (NP) toxicity. The present study assessed the effects from two size types of silver nanoparticles (AgNP: <50 nm and <100 nm) on the frequency of hemocytes subpopulations as immunomodulation biomarkers exposed in a mollusk host...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28600193/functional-and-molecular-responses-of-the-blue-mussel-mytilus-edulis-hemocytes-exposed-to-cadmium-an-in-vitro-model-and-transcriptomic-approach
#7
Philippine Granger Joly de Boissel, Michel Fournier, Juan Carlos Rodriguez-Lecompte, Patty McKenna, Frederick Kibenge, Ahmed Siah
The bivalve mollusk, Mytilus edulis, is used as a sentinel species in several monitoring programs due to its ability to bio-accumulate contaminants. Its immune system consists of hemocytes and humoral components, which constitute the main part of the hemolymph. The present study is aimed at understanding the effects of Cd on the differentially expressed genes involved in the phagocytosis of M. edulis' hemocytes. Our approach focuses on an in vitro model by exposing hemocytes to different concentrations of Cd ranging from 10(-9) M to 10(-3) M...
June 6, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28599369/biochemical-impacts-of-hg-in-mytilus-galloprovincialis-under-present-and-predicted-warming-scenarios
#8
Francesca Coppola, Ângela Almeida, Bruno Henriques, Amadeu M V M Soares, Etelvina Figueira, Eduarda Pereira, Rosa Freitas
The interest in the consequences of climate change on the physiological and biochemical functioning of marine organisms is increasing, but the indirect and interactive effects resulting from warming on bioconcentration and responsiveness to pollutants are still poorly explored, particularly in terms of cellular responses. The present study investigated the impacts of Hg in Mytilus galloprovincialis under control (17°C) and warming (21°C) conditions, assessing mussels Hg bioconcentration capacity, metabolic and oxidative status after 14 and 28days of exposure...
June 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28595933/morphologic-and-phylogenetic-studies-of-two-hypotrichous-ciliates-with-notes-on-morphogenesis-in-gastrostyla-steinii-engelmann-1862-ciliophora-hypotrichia
#9
Xiaotian Luo, Lifang Li, Chundi Wang, William Bourland, Xiaofeng Lin, Xiaozhong Hu
Two oxytrichid ciliates, Stylonychia (Metastylonychia) nodulinucleata Shi and Li, 1993 and Gastrostyla steinii Engelmann, 1862; collected from Huguangyan Maar Lake and Shenzhen Mangrove Nature Protection Area, southern China, respectively, were investigated using standard methods. The uncommon species Stylonychia (Metastylonychia) nodulinucleata can be recognized by its large body size, the conspicuous caudal cirri in vivo, and a moniliform macronucleus. We provide the first record of the small subunit ribosomal RNA (SSU rRNA) gene sequence for the species...
May 17, 2017: European Journal of Protistology
https://www.readbyqxmd.com/read/28583008/effect-of-exposure-time-particle-size-and-uptake-pathways-in-immune-cell-lysosomal-cytotoxicity-of-mussels-exposed-to-silver-nanoparticles
#10
Younes Bouallegui, Ridha Ben Younes, Faten Turki, Amine Mezni, Ridha Oueslati
Cytotoxicity evaluation of hemocytes (lysosomal membrane stability [LMS] assay) from Mytilus galloprovincialis Lamarck, exposed to a sublethal dose (100 μg/L) of two size of silver nanoparticles (AgNPs: <50 nm and <100 nm) - prior to and after inhibition of potential uptake pathways (i.e., clathrin- and caveolae-mediated endocytosis) within different times of exposure (3, 6, 12 h) - showed that there was a significant cytotoxic effect on immune cells of mussels exposed for different times to either AgNP size (p < 0...
June 6, 2017: Drug and Chemical Toxicology
https://www.readbyqxmd.com/read/28577330/treated-wastewater-effluents-as-a-source-of-pyrethroids-and-fipronil-at-todos-santos-bay-mexico-its-impact-on-sediments-and-organisms
#11
Félix Augusto Hernández-Guzmán, José Vinicio Macías-Zamora, Nancy Ramírez-Álvarez, Arturo Alvarez-Aguilar, Cristina Quezada-Hernández, Ana Paula Fonseca
Pyrethroids are insecticides widely used to control pests and disease vectors in residential areas and agricultural lands. As pyrethroids are emerging pollutants, their use is a growing concern due to their toxicity potential on aquatic organisms. Todos Santos Bay and Punta Banda estuary, two coastal bodies located to the south of Southern California Bight, were studied to establish a baseline of the current conditions of pollution by pyrethroids and fipronil. Eight pyrethroids along with fipronil and its two metabolites were determined in effluents from wastewater treatment plants (n = 3), surface sediments (n = 32), and three locations with mussels [Mytilus californianus] (n = 9)...
June 3, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28562021/shotgun-proteomics-analysis-discards-alkali-labile-phosphate-as-a-reliable-method-to-assess-vitellogenin-levels-in-mytilus-galloprovincialis
#12
Paula Sánchez-Marín, Laura E Fernández-González, Leonardo Mantilla-Aldana, Angel P Diz, Ricardo Beiras
Vitellogenin, the egg yolk precursor, is a well-known biomarker of endocrine disruption in oviparous vertebrates. In invertebrates, such as bivalves, it has been used in the last 10 years for the same purpose, despite the limited knowledge of invertebrate endocrinology. In bivalves, vitellogenin levels are usually estimated using an indirect technique, alkali labile phosphate (ALP), that assumes that vitellogenin is the most abundant phosphorylated protein in the analyzed tissue. In this study, we applied shotgun proteomics for the identification and quantification of vitellogenin in marine mussel gonads and compared the results with those obtained with the ALP method...
June 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28557427/metabolomics-approach-to-evaluate-a-baltic-sea-sourced-diet-for-cultured-arctic-char-salvelinus-alpinus-l
#13
Ken Cheng, Elisabeth Müllner, Ali A Moazzami, Hanna Carlberg, Eva Brännäs, Jana Pickova
Aqua feeds traditionally rely on fishmeal as a protein source, which is costly and unsustainable. A new feed was formulated in the study with Baltic Sea sourced decontaminated fishmeal, Mytilus edulis and Saccharomyces cerevisiae, and given to Arctic char (Salvelinus alpinus) for ten months. The diet-induced changes on metabolic profile in fish plasma, liver, and muscle were studied relative to a fishmeal-based standard diet by using a (1)H NMR-based metabolomics approach. Fish fed the test diet had higher content of betaine and lower levels of trimethylamine-N-oxide and aromatic amino acids in plasma or tissues, which were mainly caused by the diet...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28552821/utilization-of-isolated-marine-mussel-cells-as-an-in-vitro-model-to-assess-xenobiotics-induced-genotoxicity
#14
Y F Zhang, S Y Chen, M J Qu, A O Adeleye, Y N Di
Freshly isolated cells are used as an ideal experimental model in in vitro toxicology analysis, especially the detection of diverse xenobiotics induced genotoxic effects. In present study, heavy metals (Zn, Cu, Cd, Pb) and PCBs were selected as representative xenobiotics to verify the ability of in vitro model in assessing genotoxic effects in cells of marine mussels (Mytilus galloprovincialis). DNA damage and chromosome aberration were assessed in freshly isolated cells from haemolymph, gill and digestive gland by single cell gel electrophoresis and micronucleus assay respectively...
May 25, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28546025/molecular-and-functional-characterization-of-a-glycosylated-galactose-binding-lectin-from-mytilus-californianus
#15
Efrén García-Maldonado, Patricia Cano-Sánchez, Alejandra Hernández-Santoyo
Lectins play crucial roles for innate immune responses in invertebrates by recognizing and eliminating pathogens. In this study, a lectin from the mussel Mytilus californianus (MCL) was identified and characterized. The lectin was purified by affinity chromatography in α-lactose-agarose resin showing an experimental molecular mass of 18000 Da as determined by SDS-PAGE and MALDI-TOF mass spectrometry. It was specific for binding d-galactose and N-Acetyl-d-galactosamine that contained carbohydrate moieties that were also inhibited by melibiose and raffinose...
July 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28544938/sex-steroids-and-metabolic-responses-in-mussels-mytilus-galloprovincialis-exposed-to-drospirenone
#16
Tiziana Cappello, Denise Fernandes, Maria Maisano, Andrea Casano, Marta Bonastre, Maria João Bebianno, Angela Mauceri, Salvatore Fasulo, Cinta Porte
Drospirenone (DRO) is a synthetic progestin derived from 17α-spironolactone with a pharmacological mechanism of action similar to progesterone. Despite its wide use as pharmaceutical and consequent continuous release into the aquatic environment, DRO effects have been poorly investigated on aquatic biota. In order to unravel the toxicity mechanisms of DRO, mussels Mytilus galloprovincialis were exposed for 7 days to different concentrations of DRO, namely 20ng/L (Low; L), 200ng/L (Medium; M), 2000ng/L (High; H) and 10μg/L (Super High; SH) nominal doses...
May 22, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28525872/levels-and-temporal-trends-of-organochlorine-contaminants-in-mussels-from-spanish-mediterranean-waters
#17
Juan A Campillo, Beatriz Fernández, Víctor García, José Benedicto, Víctor M León
The levels and trends of organochlorine contaminants were determined along the Spanish Mediterranean coast from 2000 to 2013 using mussel, Mytilus galloprovincialis, as bioindicator species. The highest levels of PCBs and DDTs were found at industrial and urban locations, and at areas under the influence of the mouth of major rivers. Dieldrin and t-NNC were commonly detected, while HCHs, aldrin, isodrin, endrin and HCB were at levels not detectable at many areas. Significant declines on the levels of DDTs were observed at most of the areas studied...
May 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28521151/intracellular-localization-and-toxicity-of-graphene-oxide-and-reduced-graphene-oxide-nanoplatelets-to-mussel-hemocytes-in-vitro
#18
Alberto Katsumiti, Radmila Tomovska, Miren P Cajaraville
Recently, graphene materials have attracted tremendous research interest due to their unique physicochemical properties that hold great promise in electronics, energy, materials and biomedical areas. Graphene oxide (GO) is one of the most extensively studied graphene derivatives. In order to improve GO electrical properties, nanoplatelets are chemically reduced, thus increasing nanoplatelet conductivity. This reduced GO (rGO) shows different properties and behavior compared to GO. Graphene-based wastes are expected to end up in the marine environment...
April 28, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28508039/naturally-acidified-habitat-selects-for-ocean-acidification-tolerant-mussels
#19
Jörn Thomsen, Laura S Stapp, Kristin Haynert, Hanna Schade, Maria Danelli, Gisela Lannig, K Mathias Wegner, Frank Melzner
Ocean acidification severely affects bivalves, especially their larval stages. Consequently, the fate of this ecologically and economically important group depends on the capacity and rate of evolutionary adaptation to altered ocean carbonate chemistry. We document successful settlement of wild mussel larvae (Mytilus edulis) in a periodically CO2-enriched habitat. The larval fitness of the population originating from the CO2-enriched habitat was compared to the response of a population from a nonenriched habitat in a common garden experiment...
April 2017: Science Advances
https://www.readbyqxmd.com/read/28502861/analysis-of-testosterone-fatty-acid-esters-in-the-digestive-gland-of-mussels-by-liquid-chromatography-high-resolution-mass-spectrometry
#20
Cesare Guercia, Piergiorgio Cianciullo, Cinta Porte
Several studies have indicated that up to 70% of the total steroids detected in molluscs are in the esterified form and that pollutants, by modifying the esterification of steroids with fatty acids, might act as endocrine disrupters. However, despite the strong physiological significance of this process, there is almost no information on which fatty acids form the steroid esters and how this process is modulated. This study (a) investigates the formation of fatty acid esters of testosterone in digestive gland microsomal fractions of the mussel Mytilus galloprovincialis incubated with either palmitoly-CoA or CoA and ATP, and (b) assesses whether the endocrine disruptor tributyltin (TBT) interferes with the esterification of testosterone...
May 11, 2017: Steroids
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