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Long M, Marie D, Szymczak J, Toullec J, Bigeard E, Sourisseau M, Le Gac M, Guillou L, Jauzein C. Dinophyceae can use exudates as weapons against the parasite Amoebophrya sp. (Syndiniales). ISME Commun 2021; 1:34. [PMID: 37938261 PMCID: PMC9723556 DOI: 10.1038/s43705-021-00035-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 05/21/2021] [Accepted: 06/02/2021] [Indexed: 05/09/2023]
Abstract
Parasites in the genus Amoebophrya sp. infest dinoflagellate hosts in marine ecosystems and can be determining factors in the demise of blooms, including toxic red tides. These parasitic protists, however, rarely cause the total collapse of Dinophyceae blooms. Experimental addition of parasite-resistant Dinophyceae (Alexandrium minutum or Scrippsiella donghaienis) or exudates into a well-established host-parasite coculture (Scrippsiella acuminata-Amoebophrya sp.) mitigated parasite success and increased the survival of the sensitive host. This effect was mediated by waterborne molecules without the need for a physical contact. The strength of the parasite defenses varied between dinoflagellate species, and strains of A. minutum and was enhanced with increasing resistant host cell concentrations. The addition of resistant strains or exudates never prevented the parasite transmission entirely. Survival time of Amoebophrya sp. free-living stages (dinospores) decreased in presence of A. minutum but not of S. donghaienis. Parasite progeny drastically decreased with both species. Integrity of the dinospore membrane was altered by A. minutum, providing a first indication on the mode of action of anti-parasitic molecules. These results demonstrate that extracellular defenses can be an effective strategy against parasites that protects not only the resistant cells producing them, but also the surrounding community.
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Affiliation(s)
- Marc Long
- IFREMER, Centre de Brest, DYNECO Pelagos, F-29280, Plouzané, France.
| | - Dominique Marie
- UMR 7144 Sorbonne Université & Centre National pour la Recherche Scientifique, «Adaptation and Diversity in Marine Environment», Team «Ecology of Marine Plankton, ECOMAP», Station Biologique de Roscoff, 29680, Roscoff, France
| | - Jeremy Szymczak
- UMR 7144 Sorbonne Université & Centre National pour la Recherche Scientifique, «Adaptation and Diversity in Marine Environment», Team «Ecology of Marine Plankton, ECOMAP», Station Biologique de Roscoff, 29680, Roscoff, France
| | - Jordan Toullec
- IFREMER, Centre de Brest, DYNECO Pelagos, F-29280, Plouzané, France
| | - Estelle Bigeard
- UMR 7144 Sorbonne Université & Centre National pour la Recherche Scientifique, «Adaptation and Diversity in Marine Environment», Team «Ecology of Marine Plankton, ECOMAP», Station Biologique de Roscoff, 29680, Roscoff, France
| | - Marc Sourisseau
- IFREMER, Centre de Brest, DYNECO Pelagos, F-29280, Plouzané, France
| | - Mickael Le Gac
- IFREMER, Centre de Brest, DYNECO Pelagos, F-29280, Plouzané, France
| | - Laure Guillou
- UMR 7144 Sorbonne Université & Centre National pour la Recherche Scientifique, «Adaptation and Diversity in Marine Environment», Team «Ecology of Marine Plankton, ECOMAP», Station Biologique de Roscoff, 29680, Roscoff, France
| | - Cécile Jauzein
- IFREMER, Centre de Brest, DYNECO Pelagos, F-29280, Plouzané, France
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González-Fernández C, Toullec J, Lambert C, Le Goïc N, Seoane M, Moriceau B, Huvet A, Berchel M, Vincent D, Courcot L, Soudant P, Paul-Pont I. Do transparent exopolymeric particles (TEP) affect the toxicity of nanoplastics on Chaetoceros neogracile? Environ Pollut 2019; 250:873-882. [PMID: 31085473 DOI: 10.1016/j.envpol.2019.04.093] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 04/17/2019] [Accepted: 04/18/2019] [Indexed: 06/09/2023]
Abstract
The potential presence of nanoplastics (NP) in aquatic environments represents a growing concern regarding their possible effects on aquatic organisms. The objective of this study was to assess the impact of polystyrene (PS) amino-modified particles (50 nm PSNH2) on the cellular and metabolic responses of the diatom Chaetoceros neogracile cultures at two essential phases of the growth cycle, i.e. exponential (division) and stationary (storage) phases. Both cultures were exposed for 4 days to low (0.05 μg mL-1) and high (5 μg mL-1) concentrations of PS-NH2. Exposure to NP impaired more drastically the major cellular and physiological parameters during exponential phase than during the stationary phase. Only an increase in ROS production was observed at both culture phases following NP exposures. In exponential phase cultures, large decreases in chlorophyll content, esterase activity, cellular growth and photosynthetic efficiency were recorded upon NP exposure, which could have consequences on the diatoms life cycle and higher food-web levels. The observed differential responses to NP exposure according to culture phase could reflect i) the higher concentration of Transparent Exopolymer Particles (TEP) at stationary phase leading to NP aggregation and thus, probably minimizing NP effects, and/or ii) the fact that dividing cells during exponential phase may be intrinsically more sensitive to stress. This work evidenced the importance of algae physiological state for assessing the NP impacts with interactions between NP and TEP being one key factor affecting the fate of NP in algal media and their impact to algal' cells.
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Affiliation(s)
- Carmen González-Fernández
- Laboratoire des Sciences de L'Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/IFREMER, Institut Universitaire Européen de La Mer (IUEM), Rue Dumont D'Urville, 29280, Plouzané, France
| | - Jordan Toullec
- Laboratoire des Sciences de L'Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/IFREMER, Institut Universitaire Européen de La Mer (IUEM), Rue Dumont D'Urville, 29280, Plouzané, France
| | - Christophe Lambert
- Laboratoire des Sciences de L'Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/IFREMER, Institut Universitaire Européen de La Mer (IUEM), Rue Dumont D'Urville, 29280, Plouzané, France
| | - Nelly Le Goïc
- Laboratoire des Sciences de L'Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/IFREMER, Institut Universitaire Européen de La Mer (IUEM), Rue Dumont D'Urville, 29280, Plouzané, France
| | - Marta Seoane
- Laboratoire des Sciences de L'Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/IFREMER, Institut Universitaire Européen de La Mer (IUEM), Rue Dumont D'Urville, 29280, Plouzané, France
| | - Brivaela Moriceau
- Laboratoire des Sciences de L'Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/IFREMER, Institut Universitaire Européen de La Mer (IUEM), Rue Dumont D'Urville, 29280, Plouzané, France
| | - Arnaud Huvet
- Ifremer, Laboratoire des Sciences de L'Environnement Marin (LEMAR), CS 10070, 29280, Plouzané, France
| | - Mathieu Berchel
- CEMCA, UMR CNRS 6521, IBSAM, UFR Sciences, Université de Bretagne Occidentale, 6 Avenue Victor Le Gorgeu, 29238, Brest, France
| | - Dorothée Vincent
- Univ. Littoral Côte D'Opale, Univ. Lille, CNRS, UMR 8187, LOG, Laboratoire D'Océanologie et de Géosciences, 32 Avenue Foch, F-62930, Wimereux, France
| | - Lucie Courcot
- Univ. Littoral Côte D'Opale, Univ. Lille, CNRS, UMR 8187, LOG, Laboratoire D'Océanologie et de Géosciences, 32 Avenue Foch, F-62930, Wimereux, France
| | - Philippe Soudant
- Laboratoire des Sciences de L'Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/IFREMER, Institut Universitaire Européen de La Mer (IUEM), Rue Dumont D'Urville, 29280, Plouzané, France
| | - Ika Paul-Pont
- Laboratoire des Sciences de L'Environnement Marin (LEMAR), UMR 6539 CNRS/UBO/IRD/IFREMER, Institut Universitaire Européen de La Mer (IUEM), Rue Dumont D'Urville, 29280, Plouzané, France.
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El-Demerdash A, Moriou C, Toullec J, Besson M, Soulet S, Schmitt N, Petek S, Lecchini D, Debitus C, Al-Mourabit A. Bioactive Bromotyrosine-Derived Alkaloids from the Polynesian Sponge Suberea ianthelliformis. Mar Drugs 2018; 16:E146. [PMID: 29702602 PMCID: PMC5983277 DOI: 10.3390/md16050146] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/19/2018] [Accepted: 04/24/2018] [Indexed: 01/04/2023] Open
Abstract
Herein, we describe the isolation and spectroscopic identification of eight new tetrabrominated tyrosine alkaloids 2⁻9 from the Polynesian sponge Suberea ianthelliformis, along with known major compound psammaplysene D (1), N,N-dimethyldibromotyramine, 5-hydroxy xanthenuric acid, and xanthenuric acid. Cytotoxicity and acetylcholinesterase inhibition activities were evaluated for some of the isolated metabolites. They exhibited moderate antiproliferative activity against KB cancer cell lines, but psammaplysene D (1) displayed substantial cytotoxicity as well as acetylcholinesterase inhibition with IC50 values of 0.7 μM and 1.3 μM, respectively.
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Affiliation(s)
- Amr El-Demerdash
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, University Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
- Organic Chemistry Division, Chemistry Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt.
| | - Céline Moriou
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, University Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
| | - Jordan Toullec
- LEMAR, IRD, UBO, CNRS, IFREMER, IUEM, 29280 Plouzané, France.
| | - Marc Besson
- CRIOBE, CNRS, EPHE, UPVD, PSL Research University, 98729 Moorea, French Polynesia.
- Observatoire Océanologique de Banyuls-sur-Mer, Université Pierre et Marie Curie Paris, 66650 Banyuls-sur-Mer, France.
| | - Stéphanie Soulet
- EIO, UPF, ILM, IFREMER, IRD, Faa'a, 98702 Tahiti, French Polynesia.
| | - Nelly Schmitt
- EIO, UPF, ILM, IFREMER, IRD, Faa'a, 98702 Tahiti, French Polynesia.
| | - Sylvain Petek
- LEMAR, IRD, UBO, CNRS, IFREMER, IUEM, 29280 Plouzané, France.
| | - David Lecchini
- CRIOBE, CNRS, EPHE, UPVD, PSL Research University, 98729 Moorea, French Polynesia.
| | - Cécile Debitus
- LEMAR, IRD, UBO, CNRS, IFREMER, IUEM, 29280 Plouzané, France.
| | - Ali Al-Mourabit
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, University Paris-Sud, University of Paris-Saclay, 1, Avenue de la Terrasse, 91198 Gif-Sur-Yvette, France.
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Toullec J, Dubois JE. Methylidyne-methylidyne-d and water-water-d2 isotope effects on the forward and reverse rates of keto-enol tautomerization of acetone in acidic media. J Am Chem Soc 2002. [DOI: 10.1021/ja00818a027] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Keeffe JR, Kresge AJ, Toullec J. Acid-catalyzed enolization of acetophenone: catalysis by bisulfate ion in sulfuric acid solutions. CAN J CHEM 1986. [DOI: 10.1139/v86-203] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Rates of acid-catalyzed enolization of acetophenone in dilute aqueous solution, measured under conditions where the solvated proton is the only acidic species present, give a hydrogen ion catalytic coefficient, [Formula: see text], that is 35% smaller than the value obtained by X acidity function extrapolation of measurements made in moderately concentrated sulfuric acid solutions. The difference may be attributed to catalysis by bisulfate ion in the sulfuric acid solutions; this is supported by direct measurement of the bisulfate ion catalytic coefficient in dilute sulfuric acid. This revised value of [Formula: see text] leads to new, but only slightly different, values of the keto–enol equilibrium constant for acetophenone in aqueous solution, pKE = 7.96 ± 0.04, the acidity constant for acetophenone ionizing as a carbon acid, [Formula: see text] and the encounter-controlled rate constant for the reaction of acetophenone enol with molecular bromine, k = (3.2 ± 0.4) × 109 M−1 s−1.
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Toullec J, Mladenova M, Gaudemar-Bardone F, Blagoev B. Entropic evidence for the formation of carbonyl compound-dependent intermediate complexes in the ivanov reaction. Tetrahedron Lett 1983. [DOI: 10.1016/s0040-4039(00)81472-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Dubois J, Toullec J. Reactivity of the enols of saturated aliphatic ketones: quasi-identity of the rate constants for bromination and iodination. Tetrahedron Lett 1971. [DOI: 10.1016/s0040-4039(01)97182-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Toullec J, Dubois J. Complex kinetics of acid-catalysed halogenation of aliphatic ketones: α-methyl substituents effects on enolisation and enol ketonisation rates. Tetrahedron Lett 1971. [DOI: 10.1016/s0040-4039(01)97183-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Dubois JE, Toullec J. Bromination of saturated aliphatic ketones in an acidic medium: effects of structure on apparent rate constants for enolization and for bromination of the enol. ACTA ACUST UNITED AC 1969. [DOI: 10.1039/c29690000292] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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