FN Archimer Export Format PT J TI Detoxification enhancement in the gymnodimine-contaminated grooved carpet shell, Ruditapes decussatus (Linne) BT AF MEDHIOUB, Walid GUEGUEN, Marielle LASSUS, Patrick BARDOUIL, Michele TRUQUET, Philippe SIBAT, Manoella NEJIB, Medhioub PHILIPPE, Soudant MEJDEDDINE, Kraiem AMZIL, Zouher AS 1:1,2;2:1;3:1;4:1;5:1;6:1;7:2;8:3;9:2;10:1; FF 1:;2:PDG-DOP-DCN-EMP-PHYC;3:PDG-DOP-DCN-EMP-PHYC;4:PDG-DOP-DCN-EMP-PN;5:PDG-DOP-DCN-EMP-PN;6:PDG-DOP-DCN-EMP-PHYC;7:;8:;9:;10:PDG-DOP-DCN-EMP-PHYC; C1 IFREMER, Lab Phycotoxines, F-44311 Nantes 3, France. INSTM, Lab Aquaculture, Monastir 5000, Tunisia. Univ Bretagne Occidentale, IUEM, LEMAR, CNRS,UMR 6539, F-29280 Plouzane, France. C2 IFREMER, FRANCE INSTM, TUNISIA UBO, FRANCE SI NANTES SE PDG-DOP-DCN-EMP-PHYC PDG-DOP-DCN-EMP-PN IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france copubli-int-hors-europe copubli-sud IF 4.28 TC 16 UR https://archimer.ifremer.fr/doc/2010/publication-7488.pdf LA English DT Article DE ;Ruditapes decussates;Grooved carpet shell;Karenia selliformis;Gymnodimine;Toxicity;Detoxification AB In the Gulf of Gabes (Tunisia, Eastern Mediterranean sea), the grooved carpet shell Ruditapes decussatus has been seen to contain persistent levels of gymnodimine (GYM) for several years. The present experimental work represents the first attempt to assess detoxification kinetics of fast-acting toxins (FAT) in marine molluscs fed specific diets of non-toxic algae (Isochrysis galbana). To find an optimal detoxification method, two experiments were performed in which clams were first fed the toxic dinoflagellate Karenia selliformis to artificially contaminate them with GYM, thus simulating the effect of natural toxic episodes. As a second step, the same clams were fed a non-toxic algae, I. galbana. to speed up the detoxification process. Changes in toxin content over the whole experiment were assessed by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) analysis. The first results revealed (i) faster detoxification rates in digestive gland (DG) when clams were fed on L galbana compared with a starved control (no food) and (ii) a typical detoxification pattern, i.e. a rapid drop in toxin content within the first days followed by a secondary slower decrease. GYM levels could be reduced approximately to less than 5% within 7-8 days in clams fed I. galbana, according to the initial toxin levels of 1400 and 9400 mu g GYM/kg of DG, respectively. At the end of the second experiment, DSP mouse bioassay was negative when GYM was less than 100 mu g/kg DG. (C) 2009 Elsevier B.V. All rights reserved. PY 2010 PD FEB SO Harmful Algae SN 1568-9883 PU Elsevier VL 9 IS 2 UT 000274093500010 BP 200 EP 207 DI 10.1016/j.hal.2009.10.002 ID 7488 ER EF