title: Assessment of metal, metalloid, and radionuclide bioaccessibility from mussels to human consumers, using centrifugation and simulated digestion methods coupled with radiotracer techniques.
abstract: The dietary bioaccessibility of seven elements ((241)Am, Cd, Co, Cs, Mn, Se, and Zn) in the Mediterranean mussels Mytilus galloprovincialis (Lamarck, 1819) was assessed for human consumers. In this respect, we assessed and compared the proportion of elements associated with the cellular cytosolic ("soluble") fraction vs. the bioaccessible fraction derived, respectively, from (1) the differential centrifugation method and (2) the simulated digestion method. Comparisons were carried out on both raw and cooked mussels. Results showed that (1) the centrifugation method systematically underestimated (up to a factor 4) element bioaccessibility in raw mussels compared with the in vitro digestion method (e.g., 10% vs. 42% for (241)Am), and (2) the cooking process (5min at 200 degrees C) leads to concentrating the elements in mussel tissues (e.g., by a factor 2 for Zn) and reducing their bioaccessibility. Overall, the simulated in vitro digestion method appears as a powerful tool for seafood safety assessment and cooking could contribute in reducing substantially the global trace element intake from mussel tissues (up to 65% for Cd and Cs).
authors.affiliation: International Atomic Energy Agency, Marine Environment Laboratories, Principality of Monaco, Littoral, Environnement et Sociétés (LIENSs), UMR 6250, CNRS-Université de La Rochelle, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Metian
authors.forename: Laetitia
authors.initials: L
authors.lastname: Charbonnier
authors.forename: François
authors.initials: F
authors.lastname: Oberhaënsli
authors.forename: Paco
authors.initials: P
authors.lastname: Bustamante
authors.forename: Ross
authors.initials: R
authors.lastname: Jeffree
authors.forename: Jean-Claude
authors.initials: JC
authors.lastname: Amiard
authors.forename: Michel
authors.initials: M
authors.lastname: Warnau
mesh_terms: D000818:Animals; D001682:Biological Availability; D001822:Body Burden; D003257:Consumer Product Safety; D003296:Cooking; D003600:Cytosol / Q000378:metabolism; D004063:Digestion; D005506:Food Contamination; D006358:Hot Temperature; D006801:Humans; D008670:Metals / Q000378:metabolism* / Q000633:toxicity; D008984:Monaco; D049878:Mytilus / Q000378:metabolism*; D011849:Radioactive Tracers; D018570:Risk Assessment; D012758:Shellfish; D014461:Ultracentrifugation; D014874:Water Pollutants, Chemical / Q000378:metabolism* / Q000633:toxicity
chemical_list: D008670:Metals; D011849:Radioactive Tracers; D014874:Water Pollutants, Chemical