@article {128,
	title = {Underlying mechanisms of reproductive toxicity caused by multigenerational exposure of 2, bromo-4, 6-dinitroaniline (BDNA) to Zebrafish (Danio rerio) at environmental relevant levels.},
	journal = {Aquat Toxicol},
	volume = {216},
	year = {2019},
	month = {2019 Nov},
	pages = {105285},
	abstract = {<p>2-bromo-4, 6-dinitroaniline (BDNA) is a mutagenic aromatic amine involved in the production and degradation of Disperse blue 79, one of the most extensively used brominated azo dyes. In our previous study, a multigenerational exposure of BDNA (0.5, 5, 50 and 500 μg/L) to zebrafish from F adult to F larvae including a recovery group in F larvae was conducted. The effects on apical points observed in individuals and the long-term effects predicted on population were all related to reproduction. In this study, we performed molecular analysis to elucidate the underlying mechanisms of the reproductive toxicity of BDNA. In F generation, measurement of vitellogenin and transcription levels of genes associated with hypothalamus-pituitary-gland (HPG) axis, estrogen receptor (ER) and androgen receptor (AR) were conducted. There was a decrease in VTG level in the blood of F female fish and transcription of genes related to ER was more affected than that of genes related to AR. These results were consistent with adverse effects that sexual differentiation was biased towards males and fecundity was impaired in a concentration-dependent manner in adults of F generation after 150 days exposure. In F generation, global gene transcriptions of F larvae were investigated. It was uncovered that processes related to apoptosis, development and DNA damage were strongly affected. Alterations to these biological pathways accounted for the irreversible parental influence on a significant decrease in hatchability and increase in abnormality of F larvae. All evidence suggested that the multigenerational exposure of BDNA posed lasting effects transmitted from parents to offspring that persisted after exposure ceased.</p>},
	keywords = {Aniline Compounds, Animals, DNA Damage, Environmental Exposure, Female, Larva, Male, Principal Component Analysis, Reproduction, Toxicity Tests, Transcription, Genetic, Transcriptome, Vitellogenins, Water Pollutants, Chemical, Zebrafish},
	issn = {1879-1514},
	doi = {10.1016/j.aquatox.2019.105285},
	author = {Xie, Xianyi and Jin, Yaru and Ma, Zhiyuan and Tang, Song and Peng, Hui and Giesy, John P and Liu, Hongling}
}
@article {83,
	title = {Multigenerational Effects and Demographic Responses of Zebrafish ( Danio rerio) Exposed to Organo-Bromine Compounds.},
	journal = {Environ Sci Technol},
	volume = {52},
	year = {2018},
	month = {2018 Aug 07},
	pages = {8764-8773},
	abstract = {<p>Long-term exposure to toxic chemicals often has deleterious effects on aquatic organisms. In order to support appropriate environmental management of chemicals, a mathematical model was developed to characterize the effects of chemicals on multigenerational population dynamics in aquatic animals. To parametrize the model, we conducted a multigenerational laboratory toxicity test in zebrafish ( Danio rerio) exposed to 2-bromo-4,6-dinitroaniline (BDNA). Long-term exposure to BDNA considerably reduced the fecundity of adult zebrafish (F and F) and caused deformities in the offspring (F). Life history data, including changes in fecundity and population growth, were then integrated into the model to predict population dynamics of zebrafish exposed to two novel brominated flame retardants, bis(2-ethylhexyl)-2,3,4,5-tetrabromophthalate (TBPH) and 2-ethylhexyl-2,3,4,5-tetrabromobenzoate (TBB). The model predicted that the fecundity of adult zebrafish would be significantly impaired after exposure to 90.36 μM TBPH and 99.16 μM TBB. Thus, prolonged exposure to such levels over multiple generations could result in population extinction within 20 years. Our results provide an intensive temporal perspective to investigate a keystone that connects with individual response to chemicals, population dynamics, and ultimately ecosystem influences.</p>},
	issn = {1520-5851},
	doi = {10.1021/acs.est.8b00569},
	author = {Ma, Zhiyuan and Peng, Hui and Jin, Yaru and Zhang, Xianming and Xie, Xianyi and Jian, Kang and Liu, Hongling and Su, Guanyong and Tang, Song and Yu, Hongxia}
}
