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Developmental Toxicity

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https://www.readbyqxmd.com/read/28335565/an-eco-safety-assessment-of-glyoxal-containing-cellulose-ether-on-freeze-dried-microbial-strain-cyanobacteria-daphnia-and-zebrafish
#1
Chang-Beom Park, Min Ju Song, Nak Woon Choi, Sunghoon Kim, Hyun Pyo Jeon, Sanghun Kim, Youngjun Kim
The objective of this study was to investigate the aquatic-toxic effects of glyoxal-containing cellulose ether with four different glyoxal concentrations (0%, 1.4%, 2.3%, and 6.3%) in response to global chemical regulations, e.g., European Union Classification, Labeling and Packaging (EU CLP). Toxicity tests of glyoxal-containing cellulose ether on 11 different microbial strains, Microcystis aeruginosa, Daphnia magna, and zebrafish embryos were designed as an initial stage of toxicity screening and performed in accordance with standardized toxicity test guidelines...
March 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28334672/effects-of-4-mbc-and-triclosan-in-embryos-of-the-frog-pelophylax-perezi
#2
Diana Martins, Marta S Monteiro, Amadeu M V M Soares, Carla Quintaneiro
The widespread and increasing use of personal care products (PCPs) have led to environmental contamination by substances included in these products. These substances have been detected in aquatic compartments and shown to cause adverse effects on non-target aquatic organisms. In this work toxicity of the antimicrobial triclosan (TCS) and of the UV-filter 3-(4-methylbenzylidene) camphor (4-MBC) was assessed in the embryos of Perez' frog Pelophylax perezi. Lethal and sub-lethal parameters were evaluated in embryos in Gosner stage 8-9 exposed to 0...
March 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28331572/environmental-risk-factors-for-autism-an-evidence-based-review-of-systematic-reviews-and-meta-analyses
#3
REVIEW
Amirhossein Modabbernia, Eva Velthorst, Abraham Reichenberg
BACKGROUND: According to recent evidence, up to 40-50% of variance in autism spectrum disorder (ASD) liability might be determined by environmental factors. In the present paper, we conducted a review of systematic reviews and meta-analyses of environmental risk factors for ASD. We assessed each review for quality of evidence and provided a brief overview of putative mechanisms of environmental risk factors for ASD. FINDINGS: Current evidence suggests that several environmental factors including vaccination, maternal smoking, thimerosal exposure, and most likely assisted reproductive technologies are unrelated to risk of ASD...
2017: Molecular Autism
https://www.readbyqxmd.com/read/28329872/doxorubicin-has-dose-dependent-toxicity-on-mouse-ovarian-follicle-development-hormone-secretion-and-oocyte-maturation
#4
Shuo Xiao, Jiyang Zhang, Mingjun Liu, Hideyuki Iwahata, Hunter B Rogers, Teresa K Woodruff
Doxorubicin (DOX), one of the most commonly used anticancer medications, has been reported to affect fertility by damaging ovarian follicles; however, the dose-dependent toxicity of DOX on the dynamic follicle development and oocyte maturation has not been well-defined. Our objective is to determine the effects of human-relevant exposure levels of DOX on follicular functions across developmental time. In vitro cultured multilayered secondary mouse follicles were treated with DOX at 0, 2, 20, 100, and 200 nM for 24 hours, and follicle development, hormone secretion, and oocyte maturation were analyzed...
March 17, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28329712/toxicity-of-effluents-from-gasoline-stations-oil-water-separators-to-early-life-stages-of-zebrafish-danio-rerio
#5
Romulo Nepomuceno Alves, Célio Freire Mariz, Driele Ventura de Paulo, Paulo S M Carvalho
Used petroleum hydrocarbons and gasoline stations runoff are significant sources of polycyclic aromatic hydrocarbons (PAHs) to aquatic ecosystems. Samples of the final effluent of oil-water-separators were collected at gasoline stations in the metropolitan region of Recife, Brazil, before release to sewage or rainwater systems. Effluent soluble fractions (ESF) were prepared and bioassays were performed according to the Fish Embryo Toxicity Test. The test involved exposing zebrafish Danio rerio embryos to dilutions of the ESFs for 96 h, with daily examination of lethality and sublethal morphological effects integrated through the General Morphology Score (GMS), based on the achievement of developmental hallmarks...
March 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28326615/using-passive-sampling-and-zebrafish-to-identify-developmental-toxicants-in-complex-mixtures
#6
Alan J Bergmann, Robert L Tanguay, Kim A Anderson
Using effects-directed analysis (EDA), we investigate associations previously observed between PAHs and embryotoxicity in field-deployed low-density polyethylene (LDPE). We conducted EDA using a zebrafish embryo assay and iterative fractionation of extracts of LDPE that were deployed in Portland Harbor Superfund Megasite, Oregon. Whole extracts induced toxicity including mortality, edema, and notochord distortion at EC20s of approximately 100, 100, and 10 mg LDPE/mL, respectively. Through fractionation, we determined that PAHs at concentrations similar to previous research did not contribute markedly to toxicity...
March 22, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28325044/predictors-of-per-and-polyfluoroalkyl-substance-pfas-plasma-concentrations-in-6-10-year-old-american-children
#7
Maria H Harris, Sheryl L Rifas-Shiman, Antonia M Calafat, Xiaoyun Ye, Ana Maria Mora, Thomas F Webster, Emily Oken, Sharon K Sagiv
Certain per- and polyfluoroalkyl substances (PFASs) are suspected developmental toxicants, but data on PFAS concentrations and exposure routes in children are limited. We measured plasma PFASs in children aged 6-10 years from the Boston-area Project Viva pre-birth cohort, and used multivariable linear regression to estimate associations with sociodemographic, behavioral, and health-related factors, and maternal PFASs measured during pregnancy. PFAS concentrations in Project Viva children (sampled 2007-2010) were similar to concentrations among youth participants (aged 12-19 years) in the 2007-8 and 2009-10 National Health and Nutrition Examination Survey (NHANES); mean concentrations of most PFASs declined from 2007 to 2010 in Project Viva and NHANES...
March 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28324817/developmental-toxicity-and-induction-of-vitellogenin-in-embryo-larval-stages-of-zebrafish-danio-rerio-exposed-to-methyl-paraben
#8
Vrinda Yatin Dambal, Karthikeyan Ponnien Selvan, Christy Lite, S Barathi, Winkins Santosh
MethylParaben (MP), a methyl ester of p-hydroxybenzoic acid, is used as an anti-microbial preservative in foods, drugs and cosmetics for decades. It enters the aquatic environment, and can have toxic effects on aquatic organisms. Little is known on the developmental toxicity of MP exposure to zebrafish during early life stages. In this study, the developmental effects of MP were evaluated in embryo-larval zebrafish (at concentrations ranging from 100μM, 200μM, 400µM, 800μM and 1000μM for 96h post fertilization (hpf)...
March 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28322573/blood-lead-levels-and-neurodevelopmental-function-in-perinatally-hiv-exposed-uninfected-children-in-a-us-based-longitudinal-cohort-study
#9
Katherine Tassiopoulos, Yanling Huo, Joseph Braun, Paige L Williams, Renee Smith, Ann Aschengrau, Sharon Nichols, Rohan Hazra, William A Meyer, Katherine Knapp, Nagamah S Deygoo, George R Seage Iii
BACKGROUND: While children's exposure to environmental lead in the U.S. has decreased, areas of elevated levels remain. Because lead exposure is a risk factor for developmental delays, it should be considered when studying neurodevelopmental effects of in-utero antiretroviral medication (ARV) exposure in the growing population of perinatally HIV-exposed, uninfected children (PHEU). We compared blood lead levels (BPb) in PHEU children enrolled in the Surveillance Monitoring of ART Toxicities (SMARTT) Study to U...
March 21, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28321369/developmental-and-loco-like-effects-of-a-swainsonine-induced-inhibition-of-%C3%AE-mannosidase-in-the-honey-bee-apis-mellifera
#10
Laura Wedd, Regan Ashby, Sylvain Foret, Ryszard Maleszka
BACKGROUND: Deficiencies in lysosomal a-mannosidase (LAM) activity in animals, caused either by mutations or by consuming toxic alkaloids, lead to severe phenotypic and behavioural consequences. Yet, epialleles adversely affecting LAM expression exist in the honey bee population suggesting that they might be beneficial in certain contexts and cannot be eliminated by natural selection. METHODS: We have used a combination of enzymology, molecular biology and metabolomics to characterise the catalytic properties of honey bee LAM (AmLAM) and then used an indolizidine alkaloid swainsonine to inhibit its activity in vitro and in vivo...
2017: PeerJ
https://www.readbyqxmd.com/read/28318347/teratogenic-hazard-of-bpei-coated-silver-nanoparticles-to-xenopus-laevis
#11
Anita Colombo, Melissa Saibene, Elisa Moschini, Patrizia Bonfanti, Maddalena Collini, Kaja Kasemets, Paride Mantecca
Silver nanoparticles (AgNPs) are among the most exploited antimicrobial agents and are used in many consumer products. Size and surface reactivity are critical physico-chemical properties responsible for NPs toxicity, and surface coatings, often used to functionalize or stabilize AgNPs, can influence their toxic profile and biocompatibility. In the current study the developmental toxicity of 1) negatively charged citrate-coated AgNPs (Cit-AgNPs), 2) positively charged branched polyethylenimine-coated AgNPs (BPEI-AgNPs), and 3) Ag(+) (from 0...
March 20, 2017: Nanotoxicology
https://www.readbyqxmd.com/read/28316775/guarana-paullinia-cupana-mart-attenuates-methylmercury-induced-toxicity-in-caenorhabditis-elegans
#12
Leticia Priscilla Arantes, Tanara Vieira Peres, Pam Chen, Samuel Caito, Michael Aschner, Félix Alexandre Antunes Soares
The influence of routine guarana (Paullinia cupana) consumption on apparent tolerance to mercury intoxication has been proposed. The present study investigated this hypothesis in Caenorhabditis elegans, a suitable experimental model for studies in toxicology. Wild type (WT) and skn-1 (ok2315) worm strains were pretreated with guarana ethanolic extract (GEE) from larvae 1 (L1) to L4 stage and then exposed for 6 hours to methylmercury (MeHg). The analyses included evaluation of GEE's effects on lethality, developmental delay, feeding, locomotion, gene expression (sod-3, gst-4, sir-2...
November 1, 2016: Toxicology Research
https://www.readbyqxmd.com/read/28315121/untangling-the-biology-of-genetic-cardiomyopathies-with-pluripotent-stem-cell-disease-models
#13
REVIEW
Jan W Buikema, Sean M Wu
PURPOSE OF REVIEW: Recently, the discovery of strategies to reprogram somatic cells into induced pluripotent stem (iPS) cells has led to a major paradigm change in developmental and stem cell biology. The application of iPS cells and their cardiac progeny has opened novel directions to study cardiomyopathies at a cellular and molecular level. This review discusses approaches currently undertaken to unravel known inherited cardiomyopathies in a dish. RECENT FINDINGS: With improved efficiency for mutation correction by genome editing, human iPS cells have now provided a platform to untangle the biology of cardiomyopathies...
April 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28314820/amyloid-precursor-protein-in-drosophila-glia-regulates-sleep-and-genes-involved-in-glutamate-recycling
#14
Abud Jose Farca Luna, Magali Perier, Laurent Seugnet
The Amyloid Precursor Protein (App) plays a crucial role in Alzheimer disease (AD) via the production and deposition of toxic β-amyloid peptides. App is heavily expressed in neurons where the vast majority of studies investigating its function have been carried out, while almost nothing is known about its function in glia, where it is also expressed, and can potentially participate in the regulation of neuronal physiology. In this report, we investigated whether Appl, the Drosophila homolog of App, could influence sleep-wake regulation when its function is manipulated in glial cells...
March 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28301607/green-tea-proanthocyanidins-cause-impairment-of-hormone-regulated-larval-development-and-reproductive-fitness-via-repression-of-juvenile-hormone-acid-methyltransferase-insulin-like-peptide-and-cytochrome-p450-genes-in-anopheles-gambiae-sensu-stricto
#15
Jackson M Muema, Steven G Nyanjom, James M Mutunga, Sospeter N Njeru, Joel L Bargul
Successful optimization of plant-derived compounds into control of nuisance insects would benefit from scientifically validated targets. However, the close association between the genotypic responses and physiological toxicity effects mediated by these compounds remains underexplored. In this study, we evaluated the sublethal dose effects of proanthocyanidins (PAs) sourced from green tea (Camellia sinensis) on life history traits of Anopheles gambiae (sensu stricto) mosquitoes with an aim to unravel the probable molecular targets...
2017: PloS One
https://www.readbyqxmd.com/read/28300600/ethanolic-extracts-of-inula-viscosa-salix-alba-and-quercus-calliprinos-negatively-affect-the-development-of-the-entomopathogenic-nematode-heterorhabditis-bacteriophora-a-model-to-compare-gastro-intestinal-nematodes-developmental-effect
#16
Velayudhan Satheeja Santhi, Liora Salame, Levana Dvash, Hussein Muklada, Hassan Azaizeh, Raghda Mreny, Safaa Awwad, Alex Markovics, Serge Yan Landau, Itamar Glazer
Heterorhabditis bacteriophora can represent a model system for herbal medication against gastro-intestinal strongylid parasites in determining the recovery and development due to their unique parasitic infectious cycle. The fact that plant extracts impair nematode development is known but their differential impact on stages of the life cycle of H. bacteriophora has never been investigated. We examined the developmental stages resumed from eggs, young juveniles (J1-3), infective juveniles (IJs), young and adult hermaphrodites of H...
March 11, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28295044/novel-transcriptome-assembly-and-comparative-toxicity-pathway-analysis-in-mahi-mahi-coryphaena-hippurus-embryos-and-larvae-exposed-to-deepwater-horizon-oil
#17
Elvis Genbo Xu, Edward M Mager, Martin Grosell, E Starr Hazard, Gary Hardiman, Daniel Schlenk
The impacts of Deepwater Horizon (DWH) oil on morphology and function during embryonic development have been documented for a number of fish species, including the economically and ecologically important pelagic species, mahi-mahi (Coryphaena hippurus). However, further investigations on molecular events and pathways responsible for developmental toxicity have been largely restricted due to the limited molecular data available for this species. We sought to establish the de novo transcriptomic database from the embryos and larvae of mahi-mahi exposed to water accommodated fractions (HEWAFs) of two DWH oil types (weathered and source oil), in an effort to advance our understanding of the molecular aspects involved during specific toxicity responses...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28288930/assessing-the-effect-of-oral-exposure-to-paenibacillus-alvei-a-potential-biocontrol-agent-in-male-non-pregnant-pregnant-animals-and-the-developing-rat-fetus
#18
Robert L Sprando, Thomas Black, Nicholas Olejnik, Zachary Keltner, Vanessa Topping, Martine Ferguson, Darcy Hanes, Eric Brown, Jie Zheng
Paenibacillus alvei, a naturally occurring soil microorganism, may be used in the control and/or elimination of human/animal pathogens present on/within produce commodities associated with human consumption. The safety of oral exposure to P. alvei in male, nulliparous females, the pregnant dam and developing fetus was assessed. Adult male and female rats received a single oral dose (gavage) of P. alvei and tissues were collected at post exposure days 0, 3 and 14. To evaluate the effect of the test organism on fetal development, sperm positive female rats received the test organism every 3 days thereafter throughout gestation...
March 10, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28288352/effects-of-dechlorane-plus-exposure-on-axonal-growth-musculature-and-motor-behavior-in-embryo-larval-zebrafish
#19
Xiangping Chen, Qiaoxiang Dong, Yuanhong Chen, Zhenxuan Zhang, Changjiang Huang, Yaxian Zhu, Yong Zhang
Developmental neurobehavioral toxicity of Dechlorane Plus (DP) was investigated using the embryo-larval stages of zebrafish (Danio rerio). Normal fertilized embryos were waterborne exposed to DP at 15, 30, 60 μg/L beginning from 6 h post-fertilization (hpf). Larval teratology, motor activity, motoneuron axonal growth and muscle morphology were assessed at different developmental stages. Results showed that DP exposure significantly altered embryonic spontaneous movement, reduced touch-induced movement and free-swimming speed and decreased swimming speed of larvae in response to dark stimulation...
March 10, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28287790/cocaine-self-administration-in-male-and-female-rats-perinatally-exposed-to-pcbs-evaluating-drug-use-in-an-animal-model-of-environmental-contaminant-exposure
#20
Mellessa M Miller, Abby E Meyer, Jenna L N Sprowles, Helen J K Sable
Polychlorinated biphenyls (PCBs) are ubiquitous environmental toxicants known to adversely impact human health. Ortho-substituted PCBs affect the nervous system, including the brain dopaminergic system. The reinforcing effects of psychostimulants are typically modulated via the dopaminergic system, so this study used a preclinical (i.e., rodent) model to evaluate whether developmental contaminant exposure altered intravenous self-administration (IV SA) for the psychostimulant cocaine. Long-Evans rats were perinatally exposed to 6 or 3 mg/kg/day of PCBs throughout gestation and lactation and compared with nonexposed controls...
March 13, 2017: Experimental and Clinical Psychopharmacology
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