Toxicity and bioaccumulation of three hexabromocyclododecane diastereoisomers in the marine copepod Tigriopus japonicas.
Aquat Toxicol
; 188: 1-9, 2017 Jul.
Article
em En
| MEDLINE
| ID: mdl-28437657
ABSTRACT
The three major hexabromocyclododecane (HBCD) diastereoisomers, i.e. α-, ß- and γ-HBCD, have distinct physical and chemical properties that may potentially result in different levels of bioaccumulation and toxicity in aquatic organisms. To assess the impact of diastereomeric variation in HBCDs, the marine copepod Tigriopus japonicus was exposed to α-, ß- and γ-HBCD in isolation. Results showed that all the three diastereoisomers had a similar potency to cause growth delay in T. japonicas. Variation was observed in the overall survival rate with exposure to α- and ß-HBCD, and this resulted in significantly higher lethal toxicity in T. japonicas than that with exposure to γ-HBCD. Exposure to α-, ß- and γ-HBCD led to the generation of ROS in T. japonicas, a possibly toxic mechanism. Both α- and ß-HBCD showed a higher potential to induce oxidative stress, which may be a factor in the higher lethal toxicity observed with α- and ß-HBCD exposure. It is of note that T. japonicus was found to be more sensitive to all three diastereoisomers in the F1 generation than in the F0 generation. The bioconcentration potential of HBCD diastereoisomers can be ranked in the order α-HBCD>γ-HBCD>ß-HBCD and was found to be higher in T. japonicus than has been reported for fish species.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
/
Copépodes
/
Hidrocarbonetos Bromados
Limite:
Animals
Idioma:
En
Revista:
Aquat Toxicol
Assunto da revista:
BIOLOGIA
/
TOXICOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article