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Gagné PL, Fortier M, Fraser M, Parent L, Vaillancourt C, Verreault J. Dechlorane Plus induces oxidative stress and decreases cyclooxygenase activity in the blue mussel. Aquat Toxicol 2017; 188:26-32. [PMID: 28441609 DOI: 10.1016/j.aquatox.2017.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 04/12/2017] [Accepted: 04/14/2017] [Indexed: 06/07/2023]
Abstract
Dechlorane Plus (DP) is a chlorinated flame retardant used mainly in electrical wire and cable coating, computer connectors, and plastic roofing materials. Concentrations of DP (syn and anti isomers) are increasingly being reported in aquatic ecosystems worldwide. However, there is exceedingly little information on the exposure-related toxicity of DP in aquatic organisms, especially in bivalves. The objective of this study was to investigate the in vivo and in vitro effects of DP exposure on histopathology, lipid peroxidation (LPO) levels, cyclooxygenase (COX) activity, phagocytosis capacity and efficiency, and DNA strand breakage in the blue mussel (Mytilus edulis) following a 29days exposure (0.001, 0.01, 0.1 and 1.0μg DP/L). Blue mussels accumulated DP in muscle and digestive gland in a dose-dependent manner. LPO levels in gills were found to increase by 82% and 67% at the 0.01 and 1.0μg DP/L doses, respectively, while COX activity in gills decreased by 44% at the 1μg/L dose. No histopathological lesion was found in gonads following DP exposure. Moreover, no change in hemocyte DNA strand breakage, phagocytosis rate, and viability was observed following DP exposure. Present study showed that toxicity of DP may occur primarily via oxidative stress in the blue mussel and potentially other bivalves, and that gills represent the most responsive tissue to this exposure.
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Affiliation(s)
- Pierre-Luc Gagné
- Centre de recherche en toxicologie de l'environnement (TOXEN), Département des sciences biologiques, Université du Québec à Montréal, C.P. 8888, succursale Centre-ville, Montreal, QC, H3C 3P8, Canada; Center for Interdisciplinary Research on Well-Being, Health, Society and Environment (CINBIOSE), Université du Québec à Montréal, C.P. 8888, Succursale Centre-ville, Montreal, QC, H3C 3P8, Canada
| | - Marlène Fortier
- INRS-Institut Armand-Frappier, Université du Québec, 531 boulevard des Prairies, Laval, QC, H7V 1B7, Canada
| | - Marc Fraser
- Center for Interdisciplinary Research on Well-Being, Health, Society and Environment (CINBIOSE), Université du Québec à Montréal, C.P. 8888, Succursale Centre-ville, Montreal, QC, H3C 3P8, Canada; INRS-Institut Armand-Frappier, Université du Québec, 531 boulevard des Prairies, Laval, QC, H7V 1B7, Canada
| | - Lise Parent
- Center for Interdisciplinary Research on Well-Being, Health, Society and Environment (CINBIOSE), Université du Québec à Montréal, C.P. 8888, Succursale Centre-ville, Montreal, QC, H3C 3P8, Canada; Département Science et Technologie, Télé-université (TÉLUQ), 5800 rue Saint-Denis, bureau 1105, Montreal, QC, H2S 3L5, Canada
| | - Cathy Vaillancourt
- Center for Interdisciplinary Research on Well-Being, Health, Society and Environment (CINBIOSE), Université du Québec à Montréal, C.P. 8888, Succursale Centre-ville, Montreal, QC, H3C 3P8, Canada; INRS-Institut Armand-Frappier, Université du Québec, 531 boulevard des Prairies, Laval, QC, H7V 1B7, Canada
| | - Jonathan Verreault
- Centre de recherche en toxicologie de l'environnement (TOXEN), Département des sciences biologiques, Université du Québec à Montréal, C.P. 8888, succursale Centre-ville, Montreal, QC, H3C 3P8, Canada; Center for Interdisciplinary Research on Well-Being, Health, Society and Environment (CINBIOSE), Université du Québec à Montréal, C.P. 8888, Succursale Centre-ville, Montreal, QC, H3C 3P8, Canada.
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