Cadmium Induction of Metallothionein Isoforms in Juvenile and Adult Mussel(Mytilus edulis)

Ciocan, C.M. and Rotchell, J.M. (2004) Cadmium Induction of Metallothionein Isoforms in Juvenile and Adult Mussel(Mytilus edulis). Environmental Science and Technology, 38 (4). pp. 1073-1078. ISSN 0013-936X

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Isoforms of metallothionein in the digestive gland of control and experimentally Cd-exposed mussels (Mytilus edulis) (200 g L-1 Cd2+ and 400 g L-1 Cd2+; 20 days) were studied using the reverse transcriptase-polymerase chain reaction. In addition, glutathione S-transferase (GSTpi) primers were designed to evaluate the reduction in the antioxidant defense systems (glutathione) accompanying the aging process in the same organisms. Following experimental exposure, an accumulation of Cd was observed in the digestive gland of exposed mussels, both adults and juveniles, up to 500 times higher than in the control. An induction of the dimeric form MT20 II was detected in 400 g L-1 exposed mussels, as well as a visible inhibition of the monomeric form MT10 IV. After 20 days of exposure juveniles expressed increased GSTpi compared with adults. Results reveal individual variation of both metallothioneins and GSTpi expression among control and Cd2+-exposed mussels of different ages. The ecotoxicological significance of MT utilization in biomonitoring of seawater for trace metals has been considered in light of these results.

Item Type: Article
Schools and Departments: School of Life Sciences > Biology and Environmental Science
Subjects: Q Science > QH Natural history > QH0301 Biology
Depositing User: Corina Ciocan
Date Deposited: 12 Dec 2006
Last Modified: 14 Jun 2012 11:38
Google Scholar:17 Citations
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