title: Exploration of Stereoselectivity in Embryo-Larvae (Danio rerio) Induced by Chiral PCB149 at the Bioconcentration and Gene Expression Levels.
abstract: This paper was designed to study stereoselective enrichment and changes in gene expression when zebrafish (Danio rerio) embryo-larvae were exposed to racemic, (-)- or (+)- PCB149 (2,2',3,4',5',6- hexachlorobiphenyl). Based on bioconcentration analysis, non-racemic enrichment was significantly observed after racemic exposure. No isomerization between the two isomers was found after (-)/(+)-PCB149 exposure. Furthermore, based on gene expression-data mining, CYPs genes (cyp2k6, cyp19a1b, and cyp2aa4) were differential genes after (+)-PCB149 exposure. No obvious differences of dysregulation of gene expression caused by racemic and (-)-PCB149, were observed in embryo-larvae. The above results suggested that (-)-PCB149 could be considered as the main factor causing the dysregulation of gene expression in embryo-larvae after racemic exposure; and (+)-PCB149 should be pursued apart from the racemate, when considering the toxicity of chiral PCB149. Thus, the information in our study could provide new insights to assess the environmental risk of chiral PCBs in aquatic systems.
authors.affiliation: College of Science, China Agricultural University, Beijing, China.|Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Chai
authors.affiliation: College of Science, China Agricultural University, Beijing, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Cui
authors.affiliation: College of Science, China Agricultural University, Beijing, China.|Center of Fishery Resources and Ecology Environment Research, Chinese Academy of Fishery Sciences, Beijing, China.
authors.forename: Xiyan
authors.initials: X
authors.lastname: Mu
authors.affiliation: College of Science, China Agricultural University, Beijing, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.affiliation: College of Science, China Agricultural University, Beijing, China.
authors.forename: Chengju
authors.initials: C
authors.lastname: Wang
authors.affiliation: Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Qiu
mesh_terms: D000818:Animals; D015870:Gene Expression / Q000187:drug effects*; D007814:Larva / Q000187:drug effects*; D011078:Polychlorinated Biphenyls / Q000633:toxicity*; D013237:Stereoisomerism; D015027:Zebrafish / Q000196:embryology* / Q000254:growth & development
chemical_list: C120129:2,2',3,4',5',6-hexachlorobiphenyl; D011078:Polychlorinated Biphenyls