| Impact of hypoxia on hemolymph contamination by uranium in an aquatic animal, the freshwater clam Corbicula fluminea. | |
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MedLine Citation:
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PMID: 18583003 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Multi-stress situations are a major question and low-oxygenated waters (hypoxia) are a growing problem. Importantly, hypoxia stimulates the ventilatory flow rate in aquatic animals and this increases gill exposure to contaminants. Surprisingly, in the freshwater clam Corbicula fluminea, this is associated with increased bioaccumulation of uranium in gills but not in deep tissues. We searched for an explanation by analyzing hemolymph U-transport in Corbicula exposed to 0.36 microM dissolved uranium at various O2-levels for 10 days. In hypoxia, one observed an increased U concentration in the arterial hemolymph flowing from gills to tissues but this was not associated with an increased U concentration in the venous hemolymph nor in the other tissues. We conclude that the cardiac flow rate must have decreased to explain this absence of over-accumulation. In addition to its already known deleterious effects, uranium can thus deeply impair cardiac flow rate in exposed aquatic animals during multi-stress exposures. |
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Authors:
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Damien Tran; Jean-Charles Massabuau; Jacqueline Garnier-Laplace |
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Publication Detail:
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Type: Journal Article Date: 2008-06-25 |
Journal Detail:
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Title: Environmental pollution (Barking, Essex : 1987) Volume: 156 ISSN: 1873-6424 ISO Abbreviation: Environ. Pollut. Publication Date: 2008 Dec |
Date Detail:
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Created Date: 2008-11-17 Completed Date: 2009-01-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8804476 Medline TA: Environ Pollut Country: England |
Other Details:
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Languages: eng Pagination: 821-6 Citation Subset: IM |
Affiliation:
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Université Bordeaux 1, CNRS, UMR 5805 EPOC, Place du Dr Peyneau, 33120 Arcachon, France. d.tran@epoc.u-bordeaux1.fr |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Anoxia / blood, metabolism* Biological Transport Corbicula / metabolism* Ecotoxicology / methods Fresh Water Gills / chemistry, metabolism Hemolymph / chemistry*, physiology Uranium / blood, toxicity* Water Pollutants, Radioactive / blood, toxicity* |
| Chemical | |
Reg. No./Substance:
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0/Water Pollutants, Radioactive; 7440-61-1/Uranium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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