FN Archimer Export Format PT J TI In vitro modulation of reactive oxygen and nitrogen intermediate (ROI/RNI) production in Crassostrea gigas hemocytes BT AF LAMBERT, Christophe SOUDANT, Philippe JEGADEN, Marine DELAPORTE, Maryse LABREUCHE, Yannick MOAL, Jeanne SAMAIN, Jean-Francois AS 1:1;2:1;3:1;4:2;5:2;6:;7:2; FF 1:;2:;3:;4:PDG-DOP-DCB-PFOM-PI;5:PDG-DOP-DCB-PFOM-PI;6:PDG-DOP-DCB-PFOM-PI;7:PDG-DOP-DCB-PFOM-PI; C1 Univ Bretagne Occidentale, Inst Univ Europeeen Mer, Lab Sci Environm Marin, F-29280 Plouzane, France. IFREMER, Ctr Brest, UMR 100, F-29280 Plouzane, France. C2 UBO, FRANCE IFREMER, FRANCE SI BREST SE PDG-DOP-DCB-PFOM-PI IN WOS Ifremer jusqu'en 2018 copubli-france copubli-univ-france IF 1.735 TC 43 UR https://archimer.ifremer.fr/doc/2007/publication-3057.pdf LA English DT Article DE ;NO synthase;NADPH oxidase;Flow cytometry;Reactive nitrogen intermediate RNI;Reactive oxygen intermediate ROI;Hemocytes;Crassostrea gigas AB Bivalve hemocyte competence has been measured by quantifying functional characteristics, including reactive oxygen intermediate (ROI) production after activation with zymosan or phorbol myristate acetate (PMA). However, untreated oyster hemocytes also produce ROI and RNI (reactive nitrogen intermediates) after bleeding even if not stimulated by Zymosan or PMA. Extensive investigation of this parameter by flow cytometry showed that, in vitro, ROI/RNI production by untreated hemocytes maintained in seawater appeared to be independent of both bacterial burden in the serum and non-self particle phagocytosis. ROI/ RNI production in granulocytes was higher than in hyalinocytes and could be intensified when activated by zymosan but not by PMA. Both cell types used NADPH-oxidase- and NO-synthase-like pathways to produce these molecules; the NO-synthase pathway seemed relatively more dominant in hyalinocytes and NADPH-oxidase appeared more effective in granulocytes. These results provide new insights for interpreting the modulation of ROI/RNl production by untreated hemocytes shown by other studies, relative to environmental conditions or physiological status of the oysters. (c) 2007 Elsevier B.V. All rights reserved. PY 2007 PD SEP SO Aquaculture SN 0044-8486 PU Elsevier VL 270 IS 1-4 UT 000249448300041 BP 413 EP 421 DI 10.1016/j.aquaculture.2007.04.074 ID 3057 ER EF