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https://www.readbyqxmd.com/read/28411468/nine-co-localized-cytochrome-p450-genes-of-the-cyp2n-cyp2ad-and-cyp2p-gene-families-in-the-mangrove-killifish-kryptolebias-marmoratus-genome-identification-and-expression-in-response-to-b-%C3%AE-p-bpa-op-and-np
#1
Jayesh Puthumana, Bo-Mi Kim, Chang-Bum Jeong, Duck-Hyun Kim, Hye-Min Kang, Jee-Hyun Jung, Il-Chan Kim, Un-Ki Hwang, Jae-Seong Lee
The CYP2 genes are the largest and most diverse cytochrome P450 (CYP) subfamily in vertebrates. We have identified nine co-localized CYP2 genes (∼55kb) in a new cluster in the genome of the highly resilient ecotoxicological fish model Kryptolebias marmoratus. Molecular characterization, temporal and tissue-specific expression pattern, and response to xenobiotics of these genes were examined. The CYP2 gene clusters were characterized and designated CYP2N22-23, CYP2AD12, and CYP2P16-20. Gene synteny analysis confirmed that the cluster in K...
March 31, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28407500/in-vitro-and-in-vivo-estrogenic-activity-of-bpa-bpf-and-bps-in-zebrafish-specific-assays
#2
Vincent Le Fol, Selim Aït-Aïssa, Manoj Sonavane, Jean-Marc Porcher, Patrick Balaguer, Jean-Pierre Cravedi, Daniel Zalko, François Brion
Bisphenol A (BPA) is a widely used chemical that has been extensively studied as an endocrine-disrupting chemical (EDC). Other bisphenols sharing close structural features with BPA, are increasingly being used as alternatives, increasing the need to assess associated hazards to the endocrine system. In the present study, the estrogenic activity of BPA, bisphenol S (BPS) and bisphenol F (BPF) was assessed by using a combination of zebrafish-specific mechanism-based in vitro and in vivo assays. The three bisphenols were found to efficiently transactivate all zebrafish estrogen receptor (zfER) subtypes in zebrafish hepatic reporter cell lines (ZELH-zfERs)...
April 11, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28080214/-1-h-nmr-based-metabolomic-studies-of-bisphenol-a-in-zebrafish-danio-rerio
#3
Changshin Yoon, Dahye Yoon, Junghee Cho, Siwon Kim, Heonho Lee, Hyeonsoo Choi, Suhkmann Kim
Proton nuclear magnetic resonance ((1)H-NMR) spectroscopy was used to study the response of zebrafish (Danio rerio) to increasing concentrations of bisphenol A (4,4'-(propane-2,2-diyl)diphenol, BPA). Orthogonal partial least squares discriminant analysis (OPLS-DA) was applied to detect aberrant metabolomic profiles after 72 h of BPA exposure at all levels tested (0.01, 0.1, and 1.0 mg/L). The OPLS-DA score plots showed that BPA exposure caused significant alterations in the metabolome. The metabolomic changes in response to BPA exposure generally exhibited nonlinear patterns, with the exception of reduced levels of several metabolites, including glutamine, inosine, lactate, and succinate...
April 3, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28007532/role-of-g-protein-coupled-estrogen-receptor-gper-gpr30-in-maintenance-of-meiotic-arrest-in-fish-oocytes
#4
REVIEW
Peter Thomas
An essential role for GPER (formerly known as GPR30) in regulating mammalian reproduction has not been identified to date, although it has shown to be involved in the regulation a broad range of other estrogen-dependent functions. In contrast, an important reproductive role for GPER in the maintenance of oocyte meiotic arrest has been identified in teleost fishes, which is briefly reviewed here. Recent studies have clearly shown that ovarian follicle production of estradiol-17β (E2) maintains meiotic arrest in several teleost species through activation of GPER coupled to a stimulatory G protein (Gs) on oocyte plasma membranes resulting in stimulation of cAMP production and maintenance of elevated cAMP levels...
March 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27880925/developmental-bisphenol-a-exposure-impairs-sperm-function-and-reproduction-in-zebrafish
#5
Jiangfei Chen, Katerine S Saili, Yueqin Liu, Lelin Li, Yuxin Zhao, Yinhang Jia, Chenglian Bai, Robert L Tanguay, Qiaoxiang Dong, Changjiang Huang
The developmental and reproductive toxicity of bisphenol A (BPA) has been demonstrated in a variety of model systems. Zebrafish (Danio rerio) were waterborne-exposed to BPA during three different developmental stages: embryonic period:6 h post fertilization (hpf) to 5 months post fertilization (mpf); larval period: 6 days post fertilization (dpf) to 5 mpf; and sexually mature period: 3 mpf to 5 mpf. Evaluations included F0 adult growth, reproduction parameters, and F1 offspring development. BPA exposure did not affect zebrafish growth in any of exposure groups...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27855330/behavioural-effect-of-low-dose-bpa-on-male-zebrafish-tuning-of-male-mating-competition-and-female-mating-preference-during-courtship-process
#6
Xiang Li, Jia-Yu Guo, Xu Li, Hai-Jun Zhou, Shu-Hui Zhang, Xiao-Dong Liu, Dong-Yan Chen, Yong-Chun Fang, Xi-Zeng Feng
The ubiquity of environmental pollution by endocrine disrupting chemicals (EDCs) such as bisphenol A (BPA) is progressively considered as a major threat to aquatic ecosystems worldwide. Numerous toxicological studies have proved that BPA are hazardous to aquatic environment, along with alterations in the development and physiology of aquatic vertebrates. However, generally, there is a paucity in knowledge of behavioural and physiological effects of BPA with low concentration, for example, 0.22 nM (50 ng/L) and 2...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27771541/comparison-of-different-advanced-treatment-processes-in-removing-endocrine-disruption-effects-from-municipal-wastewater-secondary-effluent
#7
COMPARATIVE STUDY
Jie Sun, Jing Wang, Rui Zhang, Dongyang Wei, Qin Long, Yu Huang, Xianchuan Xie, Aimin Li
In this study, secondary effluent from the Wulongkou (WLK) municipal wastewater plant (Zhengzhou, China) was tested for its toxicity effects before and after five advanced treatment processes (ATPs, i.e. coagulation sedimentation, nan da magnetic polyacrylic anion exchange resin (NDMP) resin adsorption, activated carbon adsorption, ozonation and electro-adsorption). Results showed that estrogen disruption effects (EDEs) were particularly significant for the raw secondary effluent among the studied dioxin-like toxicity effect, androgenic/anti-androgenic response effect, EDEs, and genotoxicity effect...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27701432/influence-of-endogenous-and-exogenous-estrogenic-endocrine-on-intestinal-microbiota-in-zebrafish
#8
Yukun Liu, Yayun Yao, Huan Li, Fang Qiao, Junlin Wu, Zhen-Yu Du, Meiling Zhang
Gender is one of the factors influencing the intestinal microbial composition in mammals, but whether fish also have gender-specific intestinal microbial patterns remains unknown. In this decade, endocrine disrupting chemicals in surface and ground water of many areas and increasing observation of freshwater male fish displaying female sexual characteristics have been reported. Here we identified the difference in intestinal microbiota between male and female zebrafish, and revealed the influence of endocrine disrupting chemicals on zebrafish intestinal microbiota by using high-throughput sequencing...
2016: PloS One
https://www.readbyqxmd.com/read/27486708/screening-of-toxic-effects-of-bisphenol-a-and-products-of-its-degradation-zebrafish-danio-rerio-embryo-test-and-molecular-docking
#9
Katerina Makarova, Pawel Siudem, Katarzyna Zawada, Justyna Kurkowiak
Bisphenol A (BPA) acts as an endocrine-disrupting compound even at a low concentration. Degradation of BPA could lead to the formation of toxic products. In this study, we compare the toxicity of BPA and seven intermediate products of its degradation. The accuracy of three molecular docking programs (Surflex, Autodock, and Autodock Vina) in predicting the binding affinities of selected compounds to human (ERα, ERβ, and ERRγ) and zebrafish (ERα, ERRγA, and ERRγB) estrogen and estrogen-related receptors was evaluated...
October 2016: Zebrafish
https://www.readbyqxmd.com/read/27362491/uptake-depuration-and-bioconcentration-of-bisphenol-af-bpaf-in-whole-body-and-tissues-of-zebrafish-danio-rerio
#10
Jiachen Shi, Yunjia Yang, Jing Zhang, Yixing Feng, Bing Shao
Bisphenol AF (BPAF) is an analog of Bisphenol A (BPA) and is widely used as a raw material in the plastics industry. However, an understanding of the potential risks posed by BPAF in the aquatic environment is lacking. The bioconcentration factor (BCF) is a measure used to assess the secondary poisoning potential as well as risks to human health. In this work we measured the accumulation and elimination of BPAF in the whole-body and in liver, muscle and gonad tissues of zebrafish. BPAF uptake was relatively rapid with equilibrium concentrations reached after 24-72h of exposure...
October 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27314163/efficacy-of-uv-c-photolysis-of-bisphenol-a-on-transcriptome-alterations-of-genes-in-zebrafish-embryos
#11
Asma Saeed, Imran Hashmi, Ava Zare, Mitra Mehrabani-Zeinabad, Gopal Achari, Hamid R Habibi
The purpose of this study was to investigate the efficacy of UV-C direct photolysis of bisphenol A (BPA) as a remediation method of BPA contamination. We used zebrafish embryos as a model organism to test the toxicity and residual biological activity by measuring cytochrome P4501A1 (CYP1A), aromatase B (Aro B) and heat shock proteins (HSP-70) transcript levels. The mRNA levels of CYP1A gene increased about two fold while exposure of zebrafish embryos at 72 hpf resulted in significant induction (P = 0.048) of Aro B at 100 µg/L of BPA...
September 18, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27231882/endocrine-disrupting-compounds-reduction-and-water-quality-improvement-in-reclaimed-municipal-wastewater-a-field-scale-study-along-jialu-river-in-north-china
#12
COMPARATIVE STUDY
Jie Sun, Xiaowen Ji, Rui Zhang, Yu Huang, Ying Liang, Jinhui Du, Xianchuan Xie, Aimin Li
Several ecological restoration projects have been constructed along urban rivers in North China to purify reclaimed municipal wastewater and improve the water quality of urban rivers. These projects attempt to address several environmental issues, including treating water contamination that is not fully remediated through standard wastewater treatment. This study investigated the efficiency of reducing endocrine disrupting compounds (EDCs) and estrogenic activity in reclaimed municipal wastewater along an 18...
August 2016: Chemosphere
https://www.readbyqxmd.com/read/27156127/differential-recruitment-of-co-regulatory-proteins-to-the-human-estrogen-receptor-1-in-response-to-xenoestrogens
#13
L Cody Smith, Jessica C Clark, Joseph H Bisesi, P Lee Ferguson, Tara Sabo-Attwood
The diverse biological effects of xenoestrogens may be explained by their ability to differentially recruit co-regulatory proteins to the estrogen receptor (ER). We employed high-throughput receptor affinity binding and co-regulatory protein recruitment screening assays based on fluorescence polarization and time resolved florescence resonance energy transfer (TR-FRET), respectively, to assess xenoestrogen-specific binding and co-regulatory protein recruitment to the ER. Then we used a functional proteomic assay based on co-immunoprecipitation of ER-bound proteins to isolate and identify intact co-regulatory proteins recruited to a ligand-activated ER...
September 2016: Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics
https://www.readbyqxmd.com/read/27153368/kinetic-determination-of-vitellogenin-induction-in-the-epidermis-of-cyprinid-and-perciform-fishes-evaluation-of-sensitive-enzyme-linked-immunosorbent-assays
#14
Bernhard Allner, Mark Hennies, Cristiano F Lerche, Thomas Schmidt, Klaus Schneider, Marco Willner, Petra Stahlschmidt-Allner
Induction of vitellogenin (VTG) in male and immature fish is a standardized endpoint in endocrine-disruption testing. To establish a nondestructive swab sampling method, VTG induction in the epidermis of Cypriniformes and Perciformes species was investigated. Both VTG and estrogen receptor genes are expressed in epidermal cells. Immunoaffinity and mass fingerprint analyses show induction of identical VTG peptides in liver and epidermis. Induction of VTG by estradiol (E2) and bisphenol A (BPA) in the epidermis was quantified with homolog enzyme-linked immunosorbent assays...
May 6, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27120497/bisphenol-a-causes-reproductive-toxicity-decreases-dnmt1-transcription-and-reduces-global-dna-methylation-in-breeding-zebrafish-danio-rerio
#15
L V Laing, J Viana, E L Dempster, M Trznadel, L A Trunkfield, T M Uren Webster, R van Aerle, G C Paull, R J Wilson, J Mill, E M Santos
Bisphenol A (BPA) is a commercially important high production chemical widely used in epoxy resins and polycarbonate plastics, and is ubiquitous in the environment. Previous studies demonstrated that BPA activates estrogenic signaling pathways associated with adverse effects on reproduction in vertebrates and that exposure can induce epigenetic changes. We aimed to investigate the reproductive effects of BPA in a fish model and to document its mechanisms of toxicity. We exposed breeding groups of zebrafish (Danio rerio) to 0...
July 2, 2016: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/27107150/adverse-morphological-development-in-embryonic-zebrafish-exposed-to-environmental-concentrations-of-contaminants-individually-and-in-mixture
#16
Cassandra D Kinch, Deborah M Kurrasch, Hamid R Habibi
Exposure to environmental contaminants has been linked to developmental and reproductive abnormalities leading to infertility, spontaneous abortion, reduced number of offspring, and metabolic disorders. In addition, there is evidence linking environmental contaminants and endocrine disruption to abnormal developmental rate, defects in heart and eye morphology, and alterations in behavior. Notably, these effects could not be explained by interaction with a single hormone receptor. Here, using a whole-organism approach, we investigated morphological changes to developing zebrafish caused by exposure to a number of environmental contaminants, including bisphenol A (BPA), di(2-ethylhexyl)phthalate (DEHP), nonylphenol, and fucosterol at concentrations measured in a local water body (Oldman River, AB), individually and in mixture...
June 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27101439/global-dna-methylation-in-gonads-of-adult-zebrafish-danio-rerio-under-bisphenol-a-exposure
#17
Yan Liu, Yingying Zhang, Shiyu Tao, Yongjing Guan, Ting Zhang, Zaizhao Wang
Altered DNA methylation is pervasively associated with changes in gene expression and signal transduction after exposure to a wide range of endocrine disrupting chemicals. As a weak estrogenic chemical, bisphenol A (BPA) has been extensively studied for reproductive toxicity. In order to explore the effects of BPA on epigenetic modification in gonads of zebrafish Danio rerio, we measured the global DNA methylation together with the gene expression of DNA methyltransferase (dnmts), glycine N-methyltransferase (gnmt), and ten-eleven translocation (tets) in gonads of D...
August 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27047331/estrogenic-effects-of-several-bpa-analogs-in-the-developing-zebrafish-brain
#18
Joel Cano-Nicolau, Colette Vaillant, Elisabeth Pellegrini, Thierry D Charlier, Olivier Kah, Pascal Coumailleau
Important set of studies have demonstrated the endocrine disrupting activity of Bisphenol A (BPA). The present work aimed at defining estrogenic-like activity of several BPA structural analogs, including BPS, BPF, BPAF, and BPAP, on 4- or 7-day post-fertilization (dpf) zebrafish larva as an in vivo model. We measured the induction level of the estrogen-sensitive marker cyp19a1b gene (Aromatase B), expressed in the brain, using three different in situ/in vivo strategies: (1) Quantification of cyp19a1b transcripts using RT-qPCR in wild type 7-dpf larva brains exposed to bisphenols; (2) Detection and distribution of cyp19a1b transcripts using in situ hybridization on 7-dpf brain sections (hypothalamus); and (3) Quantification of the cyp19a1b promoter activity in live cyp19a1b-GFP transgenic zebrafish (EASZY assay) at 4-dpf larval stage...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27014939/bisphenol-a-induces-fatty-liver-by-an-endocannabinoid-mediated-positive-feedback-loop
#19
Andrea Martella, Cristoforo Silvestri, Francesca Maradonna, Giorgia Gioacchini, Marco Allarà, Giuseppe Radaelli, Darryl R Overby, Vincenzo Di Marzo, Oliana Carnevali
The xenoestrogen bisphenol A (BPA) is a widespread plasticizer detectable within several ecosystems. BPA is considered a metabolic disruptor, affecting different organs; however, little is known about its mechanism of action in the liver, in which it triggers triglyceride accumulation. Adult zebrafish (Danio rerio) exposed to BPA developed hepatosteatosis, which was associated with an increase in the liver levels of the obesogenic endocannabinoids 2-arachidonoylglycerol and anandamide and a concomitant decrease in palmitoylethanolamide...
May 2016: Endocrinology
https://www.readbyqxmd.com/read/26994444/bis-gma-affects-craniofacial-development-in-zebrafish-embryos-danio-rerio
#20
Alexander G Kramer, Jompobe Vuthiganon, Christopher S Lassiter
Estrogen is a steroid hormone that is vital in vertebrate development and plays a role in a variety of developmental processes including cartilage and craniofacial formation. The effects of estrogen can be mimicked by other compounds found in the environment known as xenoestrogens. Bisphenol-A (BPA) is a known xenoestrogen and is combined with glycidyl methacrylate to make Bisphenol A glycidyl methacrylate (Bis-GMA), a major component in dental resin based composites (RBCs). Bis-GMA based RBCs can release their components into the saliva and bloodstream...
April 2016: Environmental Toxicology and Pharmacology
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