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García-Corona JL, Fabioux C, Vanmaldergem J, Petek S, Derrien A, Terre-Terrillon A, Bressolier L, Breton F, Hegaret H. The amnesic shellfish poisoning toxin, domoic acid: The tattoo of the king scallop Pecten maximus. HARMFUL ALGAE 2024; 133:102607. [PMID: 38485441 DOI: 10.1016/j.hal.2024.102607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/22/2024] [Accepted: 02/23/2024] [Indexed: 03/19/2024]
Abstract
Domoic acid (DA) is a potent neurotoxin produced by diatoms of the genus Pseudo-nitzschia and is responsible for Amnesic Shellfish Poisoning (ASP) in humans. Some fishery resources of high commercial value, such as the king scallop Pecten maximus, are frequently exposed to toxic Pseudo-nitzschia blooms and are capable of accumulating high amounts of DA, retaining it for months or even a few years. This poses a serious threat to public health and a continuous economical risk due to fishing closures of this resource in the affected areas. Recently, it was hypothesized that trapping of DA within autophagosomic-vesicles could be one reason explaining the long retention of the remaining toxin in P. maximus digestive gland. To test this idea, we follow the kinetics of the subcellular localization of DA in the digestive glands of P. maximus during (a) the contamination process - with sequential samplings of scallops reared in the field during 234 days and naturally exposed to blooms of DA-producing Pseudo-nitzschia australis, and (b) the decontamination process - where highly contaminated scallops were collected after a natural bloom of toxic P. australis and subjected to DA-depuration in the laboratory for 60 days. In the digestive gland, DA-depuration rate (0.001 day-1) was much slower than contamination kinetics. The subcellular analyses revealed a direct implication of early autophagy in DA sequestration throughout contamination (r = 0.8, P < 0.05), while the presence of DA-labeled residual bodies (late autophagy) appeared to be strongly and significantly related to slow DA-depuration (r = -0.5) resembling an analogous DA-tattooing in the digestive glands of P. maximus. This work provides new evidence about the potential physiological mechanisms involved in the long retention of DA in P. maximus and represents the baseline to explore procedures to accelerate decontamination in this species.
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Affiliation(s)
- José Luis García-Corona
- Laboratoire des Sciences de l'Environnement Marin, Institut Universitaire Européen de la Mer, UMR 6539 LEMAR UBO, CNRS, IRD, Ifremer, Plouzané F-29280, France
| | - Caroline Fabioux
- Laboratoire des Sciences de l'Environnement Marin, Institut Universitaire Européen de la Mer, UMR 6539 LEMAR UBO, CNRS, IRD, Ifremer, Plouzané F-29280, France
| | - Jean Vanmaldergem
- Laboratoire des Sciences de l'Environnement Marin, Institut Universitaire Européen de la Mer, UMR 6539 LEMAR UBO, CNRS, IRD, Ifremer, Plouzané F-29280, France
| | - Sylvain Petek
- Laboratoire des Sciences de l'Environnement Marin, Institut Universitaire Européen de la Mer, UMR 6539 LEMAR UBO, CNRS, IRD, Ifremer, Plouzané F-29280, France
| | - Amélie Derrien
- Littoral Ler Bo, Ifremer, Station de Biologie Marine, Place de la Croix, BP40537, Concarneau 29900 CEDEX, France
| | - Aouregan Terre-Terrillon
- Littoral Ler Bo, Ifremer, Station de Biologie Marine, Place de la Croix, BP40537, Concarneau 29900 CEDEX, France
| | - Laura Bressolier
- Laboratoire des Sciences de l'Environnement Marin, Institut Universitaire Européen de la Mer, UMR 6539 LEMAR UBO, CNRS, IRD, Ifremer, Plouzané F-29280, France
| | - Florian Breton
- Écloserie du Tinduff, 148 rue de l'écloserie, Port du Tinduff, Plougastel-Daoulas 29470, France
| | - Hélène Hegaret
- Laboratoire des Sciences de l'Environnement Marin, Institut Universitaire Européen de la Mer, UMR 6539 LEMAR UBO, CNRS, IRD, Ifremer, Plouzané F-29280, France.
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García-Corona JL, Hégaret H, Deléglise M, Marzari A, Rodríguez-Jaramillo C, Foulon V, Fabioux C. First subcellular localization of the amnesic shellfish toxin, domoic acid, in bivalve tissues: Deciphering the physiological mechanisms involved in its long-retention in the king scallop Pecten maximus. HARMFUL ALGAE 2022; 116:102251. [PMID: 35710207 DOI: 10.1016/j.hal.2022.102251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 04/11/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
Domoic acid (DA), the phycotoxin responsible for amnesic shellfish poisoning (ASP), is an excitatory amino acid naturally produced by at least twenty-eight species of the bloom-forming marine diatoms Pseudo-nitzschia spp. Suspension feeders, such as bivalve mollusks, can accumulate and lengthy retain high amounts of DA in their tissues, threatening human health and leading to extensive-prolonged fishery closures, and severe economic losses. This is particularly problematic for the king scallop Pecten maximus, which retains high burdens of DA from months to years compared to other fast-depurator bivalves. Nonetheless, the physiological and cellular processes responsible for this retention are still unknown. In this work, for the first time, a novel immunohistochemical techniques based on the use of an anti-DA antibody was successfully developed and applied for DA-detection in bivalve tissues at a subcellular level. Our results show that in naturally contaminated P. maximus following a Pseudo-nitzschia australis outbreak, DA is visualized mainly within small membrane-bounded vesicles (1 - 2.5 µm) within the digestive gland cells, identified as autophagosomic structures by means of immune-electron microscopy, as well as in the mucus-producing cells, particularly those from gonad ducts and digestive tract. Trapping of DA in autophagososomes may be a key mechanism in the long retention of DA in scallops. These results and the development of DA-immunodetection are essential to provide a better understanding of the fate of DA, and further characterize DA contamination-decontamination kinetics in marine bivalves, as well as the main mechanisms involved in the long retention of this toxin in P. maximus.
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Affiliation(s)
- José Luis García-Corona
- Institut Universitaire Européen de la Mer, Laboratoire des Sciences de l'Environnement Marin (UMR6539 CNRS/UBO/IFREMER/IRD) Technopôle Brest-Iroise, Plouzané 29280, France
| | - Hélène Hégaret
- Institut Universitaire Européen de la Mer, Laboratoire des Sciences de l'Environnement Marin (UMR6539 CNRS/UBO/IFREMER/IRD) Technopôle Brest-Iroise, Plouzané 29280, France
| | - Margot Deléglise
- Institut Universitaire Européen de la Mer, Laboratoire des Sciences de l'Environnement Marin (UMR6539 CNRS/UBO/IFREMER/IRD) Technopôle Brest-Iroise, Plouzané 29280, France
| | - Adeline Marzari
- Institut Universitaire Européen de la Mer, Laboratoire des Sciences de l'Environnement Marin (UMR6539 CNRS/UBO/IFREMER/IRD) Technopôle Brest-Iroise, Plouzané 29280, France
| | - Carmen Rodríguez-Jaramillo
- Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Mar Bermejo 195, Col. Playa Palo de Santa Rita, La Paz, B.C.S. 23090, Mexico
| | - Valentin Foulon
- Université Bretagne Loire, ENIB, UMR CNRS 6285 LabSTICC, Brest 29238, France
| | - Caroline Fabioux
- Institut Universitaire Européen de la Mer, Laboratoire des Sciences de l'Environnement Marin (UMR6539 CNRS/UBO/IFREMER/IRD) Technopôle Brest-Iroise, Plouzané 29280, France.
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Microscopic anatomy of gonadal area in the deep-sea clam Calyptogena pacifica (Bivalvia: Vesicomyidae) with emphasis on somatic cells. Tissue Cell 2022; 75:101743. [DOI: 10.1016/j.tice.2022.101743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/18/2022] [Accepted: 01/20/2022] [Indexed: 11/23/2022]
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Seasonal variations in biochemical composition and nutritional quality of Crassostrea hongkongensis, in relation to the gametogenic cycle. Food Chem 2021; 356:129736. [PMID: 33831823 DOI: 10.1016/j.foodchem.2021.129736] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 03/22/2021] [Accepted: 03/27/2021] [Indexed: 11/24/2022]
Abstract
Variations in the biochemical composition and nutritional quality with annual changes in gonad development were investigated to identify the optimal harvesting time of C. hongkongensis. The glycogen levels in the mantle, muscle, and gonad-visceral mass were significantly lower in June than in December, associated with changes in the expressions of ChGS and ChGP. Protein content consistently exceeded 52% of dry weight. The only significant change in protein levels was an increase between April and June in the gonad-visceral mass, which was associated with the gonadal transition from proliferation to maturation. Moreover, C. hongkongensis consistently had a well-balanced essential amino acid profile, meeting the essential amino acid requirements of preschool children. The lipid content and fatty acid composition of C. hongkongensis varied with the reproductive cycle, but the omega-3:omega-6 ratio was consistently higher than those of C. gigas and C. virginica. In summary, the optimal harvest time of C. hongkongensis was during the inactive stage of most gonads (from August to February at Beihai).
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Kalachev AV, Yurchenko OV. Autophagy in nutrient storage cells of the Pacific oyster, Crassostrea gigas. Tissue Cell 2019; 61:30-34. [PMID: 31759404 DOI: 10.1016/j.tice.2019.08.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 08/30/2019] [Accepted: 08/31/2019] [Indexed: 11/17/2022]
Abstract
In oysters, nutrients are stored in a special type of cells referred to as vesicular-connective tissue cells (VCT-cells). These cells accumulate and provide nutrient to satisfy various needs of the organism, including gametogenesis. During the annual reproductive cycle, VCT-cells pass through a series of changes in their morphology associated with nutrients mobilization for developing germ cells. The results presented here show an approximately 33-35% increase in the number of autophagic vesicles in cytoplasm of VCT-cells in the gonadal area of C. gigas during the stage of active gametogenesis as compared to the resting stage of reproductive cycle. No destruction of VCT-cells due to autophagy or any other factors was observed, both in males and females. Our results indicate that autophagy does increase in VCT-cells of C. gigas and plays a certain role in nutrient mobilization from these cells.
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Affiliation(s)
- Alexander V Kalachev
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, 17 Palchevskogo Str., Vladivostok, 690041, Russia.
| | - Olga V Yurchenko
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, 17 Palchevskogo Str., Vladivostok, 690041, Russia
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