Exposure to toxic Alexandrium minutum activates the detoxifying and antioxidant systems in gills of the oyster Crassostrea gigas
International audience Harmful algal blooms of Alexandrium spp. dinoflagellates regularly occur in French coastal waters contaminating shellfish. Studies have demonstrated that toxic Alexandrium spp. disrupt behavioural and physiological processes in marine filter-feeders, but molecular modification...
Published in: | Harmful Algae |
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ftunivbrest:oai:HAL:hal-02556213v1 2024-02-11T10:03:03+01:00 Exposure to toxic Alexandrium minutum activates the detoxifying and antioxidant systems in gills of the oyster Crassostrea gigas Fabioux, Caroline Sulistiyani, Yeni Haberkorn, Hansy Hegaret, Helene Amzil, Zouher Soudant, Philippe Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) ANR-06-SEST-0023,MODECOPHY,Modélisation des mécanismes de contamination des coquillages par des phycotoxines(2006) 2015 https://hal.science/hal-02556213 https://doi.org/10.1016/j.hal.2015.07.003 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.hal.2015.07.003 hal-02556213 https://hal.science/hal-02556213 doi:10.1016/j.hal.2015.07.003 ISSN: 1568-9883 Harmful Algae https://hal.science/hal-02556213 Harmful Algae, 2015, 48, pp.55-62. ⟨10.1016/j.hal.2015.07.003⟩ ACL Crassostrea gigas Alexandrium minutum Paralytic shellfish toxins Antioxidant enzymes Detoxification enzymes mRNA [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2015 ftunivbrest https://doi.org/10.1016/j.hal.2015.07.003 2024-01-23T23:40:03Z International audience Harmful algal blooms of Alexandrium spp. dinoflagellates regularly occur in French coastal waters contaminating shellfish. Studies have demonstrated that toxic Alexandrium spp. disrupt behavioural and physiological processes in marine filter-feeders, but molecular modifications triggered by phycotoxins are less well understood. This study analyzed the mRNA levels of 7 genes encoding antioxidant/detoxifying enzymes in gills of Pacific oysters (Crassostrea gigas) exposed to a cultured, toxic strain of A. minutum, a producer of paralytic shellfish toxins (PST) or fed Tisochrysis lutea (T. lutea, formerly Isochrysis sp., clone Tahitian (T. iso)), a non-toxic control diet, in four repeated experiments. Transcript levels of sigma-class glutathione S-transferase (GST), glutathione reductase (GR) and ferritin (Fer) were significantly higher in oysters exposed to A. minutum compared to oysters fed T. lutea. The detoxification pathway based upon glutathione (GSH)-conjugation of toxic compounds (phase II) is likely activated, and catalyzed by GST. This system appeared to be activated in gills probably for the detoxification of PST and/or extra-cellular compounds, produced by A. minutum. GST, GR and Fer can also contribute to antioxidant functions to prevent cellular damage from increased reactive oxygen species (ROS) originating either from A. minutum cells directly, from oyster hemocytes during immune response, or from other gill cells as by-products of detoxification. Article in Journal/Newspaper Crassostrea gigas Université de Bretagne Occidentale: HAL Pacific Harmful Algae 48 55 62 |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
ACL Crassostrea gigas Alexandrium minutum Paralytic shellfish toxins Antioxidant enzymes Detoxification enzymes mRNA [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
ACL Crassostrea gigas Alexandrium minutum Paralytic shellfish toxins Antioxidant enzymes Detoxification enzymes mRNA [SDE.BE]Environmental Sciences/Biodiversity and Ecology Fabioux, Caroline Sulistiyani, Yeni Haberkorn, Hansy Hegaret, Helene Amzil, Zouher Soudant, Philippe Exposure to toxic Alexandrium minutum activates the detoxifying and antioxidant systems in gills of the oyster Crassostrea gigas |
topic_facet |
ACL Crassostrea gigas Alexandrium minutum Paralytic shellfish toxins Antioxidant enzymes Detoxification enzymes mRNA [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience Harmful algal blooms of Alexandrium spp. dinoflagellates regularly occur in French coastal waters contaminating shellfish. Studies have demonstrated that toxic Alexandrium spp. disrupt behavioural and physiological processes in marine filter-feeders, but molecular modifications triggered by phycotoxins are less well understood. This study analyzed the mRNA levels of 7 genes encoding antioxidant/detoxifying enzymes in gills of Pacific oysters (Crassostrea gigas) exposed to a cultured, toxic strain of A. minutum, a producer of paralytic shellfish toxins (PST) or fed Tisochrysis lutea (T. lutea, formerly Isochrysis sp., clone Tahitian (T. iso)), a non-toxic control diet, in four repeated experiments. Transcript levels of sigma-class glutathione S-transferase (GST), glutathione reductase (GR) and ferritin (Fer) were significantly higher in oysters exposed to A. minutum compared to oysters fed T. lutea. The detoxification pathway based upon glutathione (GSH)-conjugation of toxic compounds (phase II) is likely activated, and catalyzed by GST. This system appeared to be activated in gills probably for the detoxification of PST and/or extra-cellular compounds, produced by A. minutum. GST, GR and Fer can also contribute to antioxidant functions to prevent cellular damage from increased reactive oxygen species (ROS) originating either from A. minutum cells directly, from oyster hemocytes during immune response, or from other gill cells as by-products of detoxification. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) ANR-06-SEST-0023,MODECOPHY,Modélisation des mécanismes de contamination des coquillages par des phycotoxines(2006) |
format |
Article in Journal/Newspaper |
author |
Fabioux, Caroline Sulistiyani, Yeni Haberkorn, Hansy Hegaret, Helene Amzil, Zouher Soudant, Philippe |
author_facet |
Fabioux, Caroline Sulistiyani, Yeni Haberkorn, Hansy Hegaret, Helene Amzil, Zouher Soudant, Philippe |
author_sort |
Fabioux, Caroline |
title |
Exposure to toxic Alexandrium minutum activates the detoxifying and antioxidant systems in gills of the oyster Crassostrea gigas |
title_short |
Exposure to toxic Alexandrium minutum activates the detoxifying and antioxidant systems in gills of the oyster Crassostrea gigas |
title_full |
Exposure to toxic Alexandrium minutum activates the detoxifying and antioxidant systems in gills of the oyster Crassostrea gigas |
title_fullStr |
Exposure to toxic Alexandrium minutum activates the detoxifying and antioxidant systems in gills of the oyster Crassostrea gigas |
title_full_unstemmed |
Exposure to toxic Alexandrium minutum activates the detoxifying and antioxidant systems in gills of the oyster Crassostrea gigas |
title_sort |
exposure to toxic alexandrium minutum activates the detoxifying and antioxidant systems in gills of the oyster crassostrea gigas |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-02556213 https://doi.org/10.1016/j.hal.2015.07.003 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
ISSN: 1568-9883 Harmful Algae https://hal.science/hal-02556213 Harmful Algae, 2015, 48, pp.55-62. ⟨10.1016/j.hal.2015.07.003⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.hal.2015.07.003 hal-02556213 https://hal.science/hal-02556213 doi:10.1016/j.hal.2015.07.003 |
op_doi |
https://doi.org/10.1016/j.hal.2015.07.003 |
container_title |
Harmful Algae |
container_volume |
48 |
container_start_page |
55 |
op_container_end_page |
62 |
_version_ |
1790599186328059904 |