Document Detail


Upon exposure to Cu nanoparticles, the accumulation of copper in the isopod Porcellio scaber is due to the dissolved Cu ions inside the digestive tract.
MedLine Citation:
PMID:  23046103     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The fate of nanoparticles in organisms is of significant interest. In the current work, we used a test system with terrestrial isopods (Porcelio scaber) fed with food spiked with Cu NPs or soluble Cu salt for 14 days. Two different doses were used for spiking to yield final concentrations of 2000 and 5000 μg Cu/g dry food. After the exposure period, part of exposed group of the animals was transferred to clean food to depurate. Cu content was analysed in the digestive glands, gut and the 'rest' of the body. Similar patterns of (i) assimilated and depurated amounts of Cu, (ii) Cu body distribution, and (iii) effect on isopods feeding behaviour were observed regardless if the animals were fed with Cu NPs or soluble Cu salt spiked food. Thus, Cu ions and not CuO NPs were assimilated by the digestive gland cells. Solubilisation of the Cu NPs applied to the leaves was also analysed with chemical methods and recombinant Cu-sensing bacteria. The comparison of the in vitro data on solubilisation of Cu NPs and in vivo data on Cu accumulation in the animal tissues showed that about 99% of accumulated copper ions was dissolved from ingested Cu NPs in the digestive system of isopods.
Authors:
Miha Golobič; Anita Jemec; Damjana Drobne; Tea Romih; Kaja Kasemets; Anne Kahru
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-9
Journal Detail:
Title:  Environmental science & technology     Volume:  -     ISSN:  1520-5851     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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