Responses of growth inhibition and antioxidant gene expression in earthworms (Eisenia fetida) exposed to tetrabromobisphenol A, hexabromocyclododecane and decabromodiphenyl ether.

作者: Ya-juan Shi , Xiang-bo Xu , Xiao-qi Zheng , Yong-long Lu

DOI: 10.1016/J.CBPC.2015.06.005

关键词:

摘要: Tetrabromobisphenol A (TBBPA), hexabromocyclododecane (HBCD) and decabromodiphenyl ether (BDE 209), suspected ubiquitous contaminants, account for the largest volume of brominated flame retardants (BFRs) since penta-BDE octa-BDE have been phased out globally. In this paper, growth inhibition gene transcript levels antioxidant enzymes (superoxide dismutase (SOD), catalase (CAT)) stress-response involved in prevention oxidative stress (Hsp70) earthworms (Eisenia fetida) exposed to TBBPA, HBCD BDE 209 were measured identify toxicity effects selected BFRs on earthworms. The treated by TBBPA at 200 400 mg/kg dw inhibited rate 13.7% 22.0% respectively, while there was no significant 209. (P < 0.01) up-regulation SOD expression level observed 50 (1.77-fold) (2.06-fold). Hsp70 significantly up-regulated when concentration 50-200 (2.16-2.19-fold) (2.61-fold). No variation CAT all treatments observed, neither does target Assessed changes mRNA encoding genes earthworms, showed greatest toxicity, followed 209, consistent with trends molecular properties. results help understand mechanism defense. (C) 2015 Elsevier Inc. All rights reserved.

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