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Estrogens disrupt serotonin receptor and cyclooxygenase mRNA expression in the gonads of mussels (Mytilus edulis)

Cubero-Leon, Elena; Ciocan, Corina M.; Hill, Elizabeth M.; Osada, Makoto; Kishida, Mitsuyo; Itoh, Naoki; Kondo, Reki; Minier, Christophe; Rotchell, Jeanette M.


Elena Cubero-Leon

Corina M. Ciocan

Elizabeth M. Hill

Makoto Osada

Mitsuyo Kishida

Naoki Itoh

Reki Kondo

Christophe Minier


Estrogenic contaminants in the aquatic environment are associated with feminisation of male fish, however their effects on some invertebrate species, such as bivalve molluscs, have yet to be characterised. Gametogenesis represents a critical step in the reproductive process and is subjected to hormonal control by serotonin (5-HT), prostaglandins (synthesised by cyclooxygenases-COX) and steroids such as 17 beta-estradiol (E2). Here, we examine the responses of 5-HT receptor and COX mRNA expression in mussels, Mytilus edulis, exposed to estrogenic compounds during different stages of their reproductive cycle. In mature mussels, 5-HT receptor mRNA expression decreased following E2 exposure. The opposite trend was observed in mussels at early gametogenesis stages. COX mRNA expression levels at both stages were generally decreased by E2 exposure. Mussels at early gametogenesis stages were also exposed to ethynylestradiol (EE2) and estradiol benzoate (EB) and a significant increase in 5-HT receptor mRNA expression was observed with both xeno-estrogens. COX expression levels were increased with EB exposure but no significant effects were found with EE2 exposure. These results show that the natural estrogen, E2, as well as the synthetic estrogen, EE2, induce alterations, dependent on reproductive stage, in the mRNA expression levels of 5-HT receptor and/or COX in the marine bivalve M. edulis. (C) 2010 Elsevier B.V. All rights reserved.


Cubero-Leon, E., Ciocan, C. M., Hill, E. M., Osada, M., Kishida, M., Itoh, N., …Rotchell, J. M. (2010). Estrogens disrupt serotonin receptor and cyclooxygenase mRNA expression in the gonads of mussels (Mytilus edulis). Aquatic Toxicology, 98(2), 178-187.

Journal Article Type Article
Acceptance Date Feb 2, 2010
Online Publication Date Feb 12, 2010
Publication Date Jun 10, 2010
Print ISSN 0166-445X
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 98
Issue 2
Pages 178-187
Keywords Mytilus edulis; Cyclooxygenase; Serotonin receptor; 17 beta-estradiol Ethynylestradiol; Estradiol benzoate; Endocrine disruption
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