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pubmed-article:21546140pubmed:abstractTextUranium (U) internal distribution and involved effects in the bivalve Corbicula fluminea have been studied after direct chronic exposure (90 d, 10 ?g.L-1). U distribution was assessed at the subcellular level (Metal Rich Granules -MRG-, pellets and cytosol fractions) in two main organs of the bivalve (gills and visceral mass). Micro-localisation was investigated by TEM-EDX analysis in the gills epithelium. DNA damage in gill and hemolymph samples was measured by the Comet assay. The 90-d exposure period led to a significant increase of U concentration in gills over time (× 5) and a large U quantity in subcellular granules in gills. Finally, a significant increase (× 2) in DNA damage was noted in exposed gills and haemocytes. This study shows that the accumulation levels and consequently the potential toxicity cannot be successfully predicted only on the basis of concentration in water or in tissues and subcellular fractions after chronic exposure.lld:pubmed
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pubmed-article:21546140pubmed:authorpubmed-author:SimonOlivierOlld:pubmed
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pubmed-article:21546140pubmed:copyrightInfoCopyright © 2011 Elsevier Ltd. All rights reserved.lld:pubmed
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pubmed-article:21546140pubmed:volume102lld:pubmed
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pubmed-article:21546140pubmed:articleTitleInternal distribution of uranium and associated genotoxic damages in the chronically exposed bivalve Corbicula fluminea.lld:pubmed
pubmed-article:21546140pubmed:affiliationLaboratoire de Radioécologie et Ecotoxicologie, Institut de Radioprotection et de Sûreté Nucléaire, Cadarache, Bât, Saint Paul-Lez-Durance Cedex, France. olivier.simon@irsn.frlld:pubmed
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