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Danio rerio; acute effects; bioaccumulation; biodegradation; carcinogenicity; cell culture; cytotoxicity; developmental stages; developmental toxicity; fish; genotoxicity; in vivo studies; industry; long term effects; mortality; paper; pesticides; physicochemical properties; reproduction; risk; rivers; screening; sexual development
Abstract:
... 2,4,7,9-tetramethyl-5-decyne-4,7-diol (TMDD) is a high-production volume chemical used in paper, ink, pesticide, and adhesive industries as a wetting and anti-foaming agent. The physicochemical properties and slow biodegradation rate of TMDD indicate a low bioaccumulation potential but a high prevalence in the environment. As a consequence, TMDD has been detected in several European rivers in the ...
... To investigate the developmental effects and corresponding molecular mechanism of diesel in freshwater organisms, zebrafish embryos were exposed to 0# diesel water-accommodated fraction (WAF) at different concentrations. Mortality, embryonic morphological endpoints, transcriptional profile and lipid profile were evaluated after exposure. Exposure to 0# diesel WAF had no significant effect on the s ...
... Cryopreservation of embryos from zebrafish (Danio rerio) and other teleosts would benefit biomedical research, commercial aquaculture, and ecological conservation, but is not yet feasible. Rapid changes in embryo opacity (e.g., darkening) observed almost immediately upon initial contact between zebrafish embryos and external ice crystals have previously been attributed to intracellular ice formati ...
... The incorporation of brominated flame retardants into industrial and household appliances has increased their occurrence in the environment, resulting in deleterious effects on wildlife. With the increasing restraints on available compounds, there has been a shift to using brominated flame retardants that has seen the production of alternative brominated flame retardants such as 1,2‐dibromo‐4‐(1,2 ...
... High aquacultural rearing density and handling of fish may frequently result in skin or gills wounds, thereby facilitating the onset of secondary infections. The capacity of the zebrafish to regenerate tissues, as well as fins and other organs, makes it an ideal animal model for studying the mechanisms of tissue regeneration. Since macrophages are involved in tissue regeneration, a diet including ...
... Cryopreservation of gametes is an important method of conservation of germplasm and has wide range of applications in aquaculture and fisheries management. Cryopreservation is the most efficient method for long term storage of genetic materials. Though fish sperm cryopreservation has been a success, developing successful protocols for eggs and embryo cryopreservation still remain elusive. Several ...
DNA damage; DNA fragmentation; DNA repair; Danio rerio; additives; apoptosis; base pair mismatch; cold treatment; cryopreservation; cryoprotectants; embryo (animal); eukaryotic cells; genes; methanol; models; proteins
Abstract:
... In recent years, a large number of studies implicated cryopreservation to increased occurrence of various forms of mutations, increased DNA fragmentation and the event of apoptosis. However, the evidence emerged from such studies is somewhat inconclusive; and the current study argued that analysing the DNA damage response (DDR) from the cryopreserved cells would help characterise the nature of the ...
Danio rerio; angiogenesis; chemical reactions; chemical structure; embryogenesis; neurogenesis; organic compounds
Abstract:
... A highly practical and modular synthesis to obtain a diverse 14-membered ring-based macrocyclic toolbox is achieved. These compounds were further tested in zebrafish assays related to early embryonic development, angiogenesis, and neurogenesis, respectively. 1.4c was identified as an antiangiogenesis agent. ...
Danio rerio; data collection; metagenomics; microorganisms
Abstract:
... Data presented here contains metagenomic analysis regarding the sequential conventionalization of germ-free zebrafish embryos. Zebrafish embryos that underwent a germ-free sterilization process immediately after fertilization were promptly exposed to and raised to larval stage in conventional fish water. At 6 days postfertilization (dpf), these “conventionalized” larvae were compared to zebrafish ...
Lurian Fenske; Ani Carla Concato; Ana Paula Vanin; Wagner Antonio Tamagno; Jéssica Reis de Oliveira Sofiatti; Helen Treichel; João Gabriel Santos da Rosa; Leonardo José Gil Barcellos; Rosilene R. Kaizer
... The synthetic estrogen, 17-α-ethinylestradiol (EE2), present in contraceptive pills, is an endocrine-disrupting chemical (EDC) that can be found in the aquatic environment. We examined the impacts of EE2 on zebrafish behavioral and physiological responses through the novel tank test (NTT), which measures anxiety-like behavior; the mirror-induced aggression (MIA) test, which measures aggressiveness ...
... Ethinyl estradiol is a potent endocrine disrupting compound in fish and ubiquitously present in the aquatic environment. In this study, we exposed adult zebra fish (Danio rerio) males to 0, 5 or 25ng Ethinyl estradiol/L for 14 days and analyzed the effects on non-reproductive behavior. Effects of treatment of the exposed males was shown by vitellogenin induction, while brain aromatase (CYP 19B) ac ...
water pollution; messenger RNA; DNA damage; liver; biomarkers; laboratory animals; reverse transcriptase polymerase chain reaction; nucleotides; gene expression; animal models; DNA repair; fish; vitellogenin; Danio rerio; estradiol
Abstract:
... Waterborne 17α-ethinylestradiol (EE2) alters hormone-mediated biological indicators in fish. These alterations include increased plasma vitellogenin, increased intersex individuals, decreased egg and sperm production, reduced gamete quality, and complete feminization of male fish. Together, these observations implicate aquatic estrogens in a broad range of detrimental effects on fish reproduction ...
... Until now, studies dedicated to the actions of endocrine disrupting chemicals (EDCs) on the reproductive axis have been concerned with their effects at the gonadal level leaving their actions on neuroendocrine circuits controlling reproduction virtually unexplored. In vertebrates, gonadotropin-releasing hormone (GnRH) is the key factor controlling the activity of the reproductive axis. The develop ...
Danio rerio; estrogens; hormone receptors; hormone agonists; hormone antagonists; liver; DNA adducts; DNA damage; DNA repair; nucleotides; messenger RNA; lesions (animal)
Abstract:
... Nucleotide excision repair (NER) is the primary mechanism that removes bulky DNA adducts such as those caused by ubiquitous environmental mutagens including benzo(a)pyrene and other polycyclic aromatic hydrocarbons. Recent data suggest that exposure to environmentally relevant concentrations of estrogen decreases hepatic mRNA abundance of several key NER genes in adult zebrafish (Danio rerio). How ...
Joana Soares; Teresa Neuparth; Angeliki Lyssimachou; Daniela Lima; Ana André; Maria A. Reis-Henriques; Luís Filipe C. Castro; António Paulo Carvalho; Nuno M. Monteiro; Miguel M. Santos
... Although chemicals are usually present in the environment in complex mixtures, ecotoxicological risk assessments often rely on data from single exposures to contaminants. The present study aimed at examining the effects of two ubiquitous endocrine disrupting chemicals (EDCs), 17α-ethynilestradiol (EE2) and tributyltin (TBT), single and combined, in zebrafish (Danio rerio) reproduction and embryoni ...
... Fish are exposed to estrogens, progestins and glucocorticoids in the aquatic environment but effects on the blood coagulation cascade are unknown. Here we analyzed effects of 17β-estradiol (E2) alone and in combination with mixtures of new generation progestins and the glucocorticoid clobetasol propionate (CLO) in zebrafish embryos to assess their effects on the blood coagulation system. We assess ...
... 17β-Estradiol (E2) plays important roles in the development and differentiation of the gonad and central nervous systems, but little is known regarding the effects of exogenous E2 on chondrogenesis in skeletal development. In the present study, we found that treatment with E2 1-5 days post-fertilization (dpf) at concentrations above 1.5×10⁻⁵ M increased the mortality rate in zebrafish embryos. Mor ...
... Exposure to 17β-trenbolone caused a skewed sex ratio in fish. However, the molecular initiating event and key molecular event(s) remain unknown. In this study, zebrafish were exposed to 17β-trenbolone at nominal concentrations of 2 ng/L, 20 ng/L, 200 ng/L, and 2000 ng/L from fertilization to 60 days post fertilization (dpf). First, the sex ratio at 60 dpf was calculated to evaluate adverse outcome ...
... Spills of diluted bitumen (dilbit) from pipelines pose a risk to the health of aquatic organisms, including fish, and with expected increases in production and transportation of dilbit, these risks could increase. To date, the majority of studies have investigated effects of fresh dilbit on aquatic organisms, but little is known about effects of weathered sediment-bound dilbit, including mechanism ...
... As a systemic triazole fungicide, limited information is known about diniconazole. In this study, toxicological effects and bioaccumulation behavior of diniconazole in zebrafish were both evaluated to perform an overall assessment of its environmental risk towards aquatic organisms. The 1H NMR-based metabolomics analysis revealed that 70 μg L−1 diniconazole exposure increased valine, leucine, isol ...