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Monserrat M, Asnaghi V, Verdura J, Meroni L, Lemée R, Rossi AM, Romero G, Priouzeau F, Chiantore M, Mangialajo L. From micro to mesoscale: Understanding the influence of macroalgal communities on Ostreopsis Schmidt blooms. HARMFUL ALGAE 2024; 136:102650. [PMID: 38876526 DOI: 10.1016/j.hal.2024.102650] [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: 08/05/2023] [Revised: 05/08/2024] [Accepted: 05/19/2024] [Indexed: 06/16/2024]
Abstract
Harmful Algal Blooms (HABs) are increasing in temperate areas, and the growth rates of benthic harmful dinoflagellates may be favoured in the context of global climate change. Benthic dinoflagellates, including species belonging to the Ostreopsis Schmidt genus, are known to develop on the surface of macroalgae and different macroalgal morphotypes and communities could host higher or lower cell abundances. The physical structure of the macroalgal substrate at the small scale (cm, microhabitat scale) and the structural complexity of the macroalgal community at the medium scale (few m, mesohabitat scale) could play a relevant role in bloom facilitation: the hypothesis that Ostreopsis species could be associated with macroalgal turfs and shrubs, structurally less complex communities than canopy-forming macroalgae, is especially under discussion and, if confirmed, could link bloom occurrence to regime shifts in temperate ecosystems. The present study, performed in two locations of the Ligurian Sea (Rochambeau, France and Vernazzola, Italy) aimed at understanding marine vegetation's role at the micro and mesohabitat scales in controlling the distribution and abundance of Ostreopsis. The abundance of the microalgal cells was quantified at different spatial scales, from cm to a few m, on different macroalgal species and communities, including artificial substrates, to tease apart the micro and mesohabitat effects. The results obtained show a high spatio-temporal variability, potentially hiding habitat-related patterns. The substrate's preferences diminish when cell abundances are very high, as in the case of Rochambeau, while in presence of moderate cell abundances as in Vernazzola or the first phases of blooms, it is possible to appreciate differences in abundances among substrates (in our study, Dictyota fasciola (Roth) Lamouroux supporting higher abundances). Our results open new research topics such as the study of blooms at a larger scale (macrohabitat) and testing different sampling methods to standardise the cells' abundances independently on the substrate.
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Affiliation(s)
- M Monserrat
- Université Côte d'Azur, CNRS, ECOSEAS, France; CoNISMa, Piazzale Flaminio 9, Roma Italy.
| | - V Asnaghi
- CoNISMa, Piazzale Flaminio 9, Roma Italy; DiSTAV, Università di Genova, C. so Europa 26, 16132 Genoa, Italy; National Biodiversity Future Center, 90133 Palermo, Italy
| | - J Verdura
- Université Côte d'Azur, CNRS, ECOSEAS, France; Departament de Biologia Marina, Institut de Ciències del Mar (CSIC), Barcelona, Spain
| | - L Meroni
- CoNISMa, Piazzale Flaminio 9, Roma Italy; DiSTAV, Università di Genova, C. so Europa 26, 16132 Genoa, Italy; National Biodiversity Future Center, 90133 Palermo, Italy
| | - R Lemée
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, France
| | - A M Rossi
- DiSTAV, Università di Genova, C. so Europa 26, 16132 Genoa, Italy
| | - G Romero
- Université Côte d'Azur, CNRS, ECOSEAS, France
| | - F Priouzeau
- Université Côte d'Azur, CNRS, ECOSEAS, France
| | - M Chiantore
- CoNISMa, Piazzale Flaminio 9, Roma Italy; DiSTAV, Università di Genova, C. so Europa 26, 16132 Genoa, Italy; National Biodiversity Future Center, 90133 Palermo, Italy
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Queiroga FR, Hegaret H, Carvalho WF, Naveira C, Rodrigues N, Santos FSD, Nascimento SM, Neves RAF. In vitro effects of the harmful benthic dinoflagellates Prorocentrum hoffmannianum and Ostreopsis cf. ovata on immune responses of the farmed oyster Crassostrea gasar. MARINE ENVIRONMENTAL RESEARCH 2024; 198:106503. [PMID: 38640692 DOI: 10.1016/j.marenvres.2024.106503] [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: 11/09/2023] [Revised: 04/08/2024] [Accepted: 04/10/2024] [Indexed: 04/21/2024]
Abstract
Oyster culture is a sustainable solution to food production. However, this activity can be severely impacted by the presence and proliferation of harmful microalgae such as the benthic dinoflagellates Prorocentrum hoffmannianum and Ostreopsis cf. ovata. This study aimed to evaluate the in vitro effects of P. hoffmannianum and O. cf. ovata on immune system cells (hemocytes) of the native cultured oyster Crassostrea gasar. The direct toxicity of both dinoflagellates was first evaluated assessing hemocyte viability exposed to eight concentrations of each HAB species. No reduction in hemocyte viability was found with the exposure to cell culture or the crude extract of P. hoffmannianum, but O. cf. ovata culture induced hemocyte death in a concentration-dependent manner. Ostreopsis cf. ovata concentration that promoted half of maximal reduction in hemocyte viability (EC50) was 779 cells mL-1. Posteriorly, hemocytes were exposed to both dinoflagellate cells and crude extracts to investigate their effects on hemocyte functional parameters. Despite no direct toxicity of the dinoflagellate cells, P. hoffmannianum extract caused a threefold increase in ROS production and decreased the phagocytosis rate by less than half. Ostreopsis cf. ovata cells and crude extracts also triggered an increase in ROS production (two-fold), but the phagocytosis rate was reduced (by half) only in response to the two lower cell concentrations. These results indicate a harmful potential of both dinoflagellates through a direct toxicity (only for O. cf. ovata) and functional impairment of hemocytes (both species) which could expose C. gasar oyster to opportunistic infections.
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Affiliation(s)
- Fernando Ramos Queiroga
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzané, France; Research Group of Experimental and Applied Aquatic Ecology, Federal University of the State of Rio de Janeiro (UNIRIO), Avenida Pasteur, 458 - 307, Urca, Rio de Janeiro, CEP: 22.290-240, Brazil.
| | - Hélène Hegaret
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzané, France
| | - Wanderson Fernandes Carvalho
- Research Group of Experimental and Applied Aquatic Ecology, Federal University of the State of Rio de Janeiro (UNIRIO), Avenida Pasteur, 458 - 307, Urca, Rio de Janeiro, CEP: 22.290-240, Brazil
| | - Clarissa Naveira
- Research Group of Experimental and Applied Aquatic Ecology, Federal University of the State of Rio de Janeiro (UNIRIO), Avenida Pasteur, 458 - 307, Urca, Rio de Janeiro, CEP: 22.290-240, Brazil
| | - Nathália Rodrigues
- Research Group of Experimental and Applied Aquatic Ecology, Federal University of the State of Rio de Janeiro (UNIRIO), Avenida Pasteur, 458 - 307, Urca, Rio de Janeiro, CEP: 22.290-240, Brazil
| | - Fernanda Silva Dos Santos
- Research Group of Experimental and Applied Aquatic Ecology, Federal University of the State of Rio de Janeiro (UNIRIO), Avenida Pasteur, 458 - 307, Urca, Rio de Janeiro, CEP: 22.290-240, Brazil
| | - Silvia Mattos Nascimento
- Marine Microalgae Laboratory, Federal University of the State of Rio de Janeiro (UNIRIO), Avenida Pasteur, 458, Urca, Rio de Janeiro, CEP: 22.290-240, Brazil
| | - Raquel A F Neves
- Research Group of Experimental and Applied Aquatic Ecology, Federal University of the State of Rio de Janeiro (UNIRIO), Avenida Pasteur, 458 - 307, Urca, Rio de Janeiro, CEP: 22.290-240, Brazil
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Drouet K, Lemée R, Guilloud E, Schmitt S, Laza-Martinez A, Seoane S, Boutoute M, Réveillon D, Hervé F, Siano R, Jauzein C. Ecophysiological responses of Ostreopsis towards temperature: A case study of benthic HAB facing ocean warming. HARMFUL ALGAE 2024; 135:102648. [PMID: 38830713 DOI: 10.1016/j.hal.2024.102648] [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: 11/03/2023] [Revised: 04/05/2024] [Accepted: 05/15/2024] [Indexed: 06/05/2024]
Abstract
Reports of the benthic dinoflagellate Ostreopsis spp. have been increasing in the last decades, especially in temperate areas. In a context of global warming, evidences of the effects of increasing sea temperatures on its physiology and its distribution are still lacking and need to be investigated. In this study, the influence of temperature on growth, ecophysiology and toxicity was assessed for several strains of O. cf. siamensis from the Bay of Biscay (NE Atlantic) and O. cf. ovata from NW Mediterranean Sea. Cultures were acclimated to temperatures ranging from 14.5 °C to 32 °C in order to study the whole range of each strain-specific thermal niche. Acclimation was successful for temperatures ranging from 14.5 °C to 25 °C for O. cf. siamensis and from 19 °C to 32 °C for O. cf. ovata, with the highest growth rates measured at 22 °C (0.54-1.06 d-1) and 28 °C (0.52-0.75 d-1), respectively. The analysis of cellular content of pigments and lipids revealed some aspects of thermal acclimation processes in Ostreopsis cells. Specific capacities of O. cf. siamensis to cope with stress of cold temperatures were linked with the activation of a xanthophyll cycle based on diadinoxanthin. Lipids (neutral reserve lipids and polar ones) also revealed species-specific variations, with increases in cellular content noted under extreme temperature conditions. Variations in toxicity were assessed through the Artemia franciscana bioassay. For both species, a decrease in toxicity was observed when temperature dropped under the optimal temperature for growth. No PLTX-like compounds were detected in O. cf. siamensis strains. Thus, the main part of the lethal effect observed on A. franciscana was dependent on currently unknown compounds. From a multiclonal approach, this work allowed for defining specificities in the thermal niche and acclimation strategies of O. cf. siamensis and O. cf. ovata towards temperature. Potential impacts of climate change on the toxic risk associated with Ostreopsis blooms in both NW Mediterranean Sea and NE Atlantic coast is further discussed, taking into account variations in the geographic distribution, growth abilities and toxicity of each species.
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Affiliation(s)
- K Drouet
- Sorbonne Université, CNRS - Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, 06230, France; Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France.
| | - R Lemée
- Sorbonne Université, CNRS - Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, 06230, France
| | - E Guilloud
- Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France
| | - S Schmitt
- Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France
| | - A Laza-Martinez
- Department of Plant Biology and Ecology, University of the Basque Country UPV/EHU, Leioa, 48940, Spain; Research Centre for Experimental Marine Biology and Biotechnology (Plentzia Marine Station, PiE- UPV/EHU), Plentzia, 48620, Spain
| | - S Seoane
- Department of Plant Biology and Ecology, University of the Basque Country UPV/EHU, Leioa, 48940, Spain; Research Centre for Experimental Marine Biology and Biotechnology (Plentzia Marine Station, PiE- UPV/EHU), Plentzia, 48620, Spain
| | - M Boutoute
- Sorbonne Université, CNRS - Laboratoire d'Océanographie de Villefranche (UMR 7093), Villefranche-sur-Mer, 06230, France
| | - D Réveillon
- Ifremer, PHYTOX, Laboratoire METALG, F-44000, Nantes, France
| | - F Hervé
- Ifremer, PHYTOX, Laboratoire METALG, F-44000, Nantes, France
| | - R Siano
- Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France
| | - C Jauzein
- Ifremer, DYNECO/Pelagos, F-29280, Plouzané, France
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Paradis C, Chomérat N, Vaucel JA, Antajan E, Labes P, Rappoport M, Labadie M. Impacts on Human Health Potentially Caused by Exposure to an Unprecedented Ostreopsis spp Bloom in the Bay of Biscay, French Basque Coast. Wilderness Environ Med 2024; 35:13-21. [PMID: 38379487 DOI: 10.1177/10806032231220405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
INTRODUCTION In recent years, climate change and human activity have modified marine biotopes, including the widening distribution of harmful algal blooms (HABs). Bloom events predominated by microalgae of the genus Ostreopsis have been described on the French Mediterranean coast, but in 2021 an unprecedented bloom occurred on the French Basque coast. The objective of this study is to describe the health impact of the Ostreopsis spp bloom that occurred on the French Basque coast in 2021. METHODS A historical cohort was conducted, including cases of possible exposure to Ostreopsis spp registered at the Centre Antipoison de Nouvelle-Aquitaine between July 1 and September 30, 2021. RESULTS Of 674 patients with possible toxicity due to Ostreopsis spp, 96.9% had bathed in contaminated waters. Most of them developed respiratory tract symptoms (64.4% of patients). The time to the onset of symptoms was <6 h for 73.6% of 174 short-term (<24 h) exposed patients. The median duration of symptoms was 7.5 days for occupational (e.g., lifeguards and surfing instructors) and 3 days for recreational exposures. There were no severe cases. In total, 3% of the cases were of moderate severity, and 97% were of minor severity, according to the Poisoning Severity Score. CONCLUSION Toxic reactions caused by Ostreopsis spp are mostly benign. The clinical picture is similar to that described following exposures to Ostreopsis cf. ovata blooms in the Mediterranean area since the end of the 20th century. Ostreopsis spp are present on the Basque coast. The ecological factors promoting its blooms remain to be clarified.
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Affiliation(s)
- Camille Paradis
- Centre Anti-Poison de Nouvelle-Aquitaine, Bordeaux University Hospital, 33076, Bordeaux, France
| | | | - Jules-Antoine Vaucel
- Centre Anti-Poison de Nouvelle-Aquitaine, Bordeaux University Hospital, 33076, Bordeaux, France
| | | | - Patrice Labes
- Urgences SAMU-SMUR, Centre Hospitalier de la Côte Basque, 64100, Bayonne, France
| | - Marc Rappoport
- Médecine interne, Saint-Palais Hospital - Donapaleuko Ospitalea, 64120, Saint-Palais, France
| | - Magali Labadie
- Centre Anti-Poison de Nouvelle-Aquitaine, Bordeaux University Hospital, 33076, Bordeaux, France
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Lanceleur R, Gémin MP, Blier AL, Meslier L, Réveillon D, Amzil Z, Ternon E, Thomas OP, Fessard V. Toxic responses of metabolites produced by Ostreopsis cf. ovata on a panel of cell types. Toxicon 2024; 240:107631. [PMID: 38331106 DOI: 10.1016/j.toxicon.2024.107631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/11/2024] [Accepted: 01/28/2024] [Indexed: 02/10/2024]
Abstract
Blooms of the dinoflagellate Ostreopsis cf. ovata are regularly associated with human intoxications that are attributed to ovatoxins (OVTXs), the main toxic compounds produced by this organism and close analogs to palytoxin (PlTX). Unlike for PlTX, information on OVTXs'toxicity are scarce due to the absence of commercial standards. Extracts from two cultures of Mediterranean strains of O. cf. ovata (MCCV54 and MCCV55), two fractions containing or not OVTXs (prepared from the MCCV54 extract) and OVTX-a and -d (isolated from the MCCV55 extract) were generated. These chemical samples and PlTX were tested on a panel of cell types from several organs and tissues (skin, intestine, lung, liver and nervous system). The MCCV55 extract, containing a 2-fold higher amount of OVTXs than MCCV54 extract, was shown to be more cytotoxic on all the cell lines and more prone to increase interleukin-8 (IL-8) release in keratinocytes. The fraction containing OVTXs was also cytotoxic on the cell lines tested but induced IL-8 release only in liver cells. Unexpectedly, the cell lines tested showed the same sensitivity to the fraction that does not contain OVTXs. With this fraction, a pro-inflammatory effect was shown both in lung and liver cells. The level of cytotoxicity was similar for OVTX-a and -d, except on intestinal and skin cells where a weak difference of toxicity was observed. Among the 3 toxins, only PlTX induced a pro-inflammatory effect mostly on keratinocytes. These results suggest that the ubiquitous Na+/K+ ATPase target of PlTX is likely shared with OVTX-a and -d, although the differences in pro-inflammatory effect must be explained by other mechanisms.
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Affiliation(s)
- Rachelle Lanceleur
- ANSES, Fougères Laboratory, Toxicology of Contaminants Unit, French Agency for Food, Environmental and Occupational Health & Safety, Fougères, 35 306, France
| | | | - Anne-Louise Blier
- ANSES, Fougères Laboratory, Toxicology of Contaminants Unit, French Agency for Food, Environmental and Occupational Health & Safety, Fougères, 35 306, France
| | - Lisa Meslier
- ANSES, Fougères Laboratory, Toxicology of Contaminants Unit, French Agency for Food, Environmental and Occupational Health & Safety, Fougères, 35 306, France
| | | | - Zouher Amzil
- IFREMER, PHYTOX, METALG Laboratory, 44000, Nantes, France
| | - Eva Ternon
- Sorbonne Université, CNRS, Laboratoire d'Océanographie de Villefranche, UMR 7093, BP 28, 06230, Villefranche-sur-Mer, France; Université Côte d'Azur, CNRS, OCA, IRD, Géoazur, 250 rue Albert Einstein, 06560, Valbonne, France
| | - Olivier P Thomas
- School of Biological and Chemical Sciences and Ryan Institute, University of Galway, University Road, H91TK33, Galway, Ireland
| | - Valérie Fessard
- ANSES, Fougères Laboratory, Toxicology of Contaminants Unit, French Agency for Food, Environmental and Occupational Health & Safety, Fougères, 35 306, France.
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Giuliani ME, Bacchiocchi S, Accoroni S, Siracusa M, Campacci D, Notarstefano V, Mezzelani M, Piersanti A, Totti C, Benedetti M, Regoli F, Gorbi S. Subcellular effects and lipid metabolism alterations in the gilthead seabream Sparus aurata fed on ovatoxins-contaminated mussels. CHEMOSPHERE 2024; 352:141413. [PMID: 38336037 DOI: 10.1016/j.chemosphere.2024.141413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 01/30/2024] [Accepted: 02/06/2024] [Indexed: 02/12/2024]
Abstract
The marine microalgae Ostreopsis cf. ovata are a well-known producer of palytoxin (PlTXs) analogues, i.e. ovatoxins (OVTXs) among others, which arouse concern for animal and human health. Both in field and laboratory studies, presence of OVTXs, detected in species directly feeding on O. cf. ovata, was frequently correlated with impairment on organisms' physiology, development and behaviour, while similar knowledge is still lacking for animals feeding on contaminated preys. In this study, transfer and toxicity of OVTXs were evaluated in an exposure experiment, in which gilthead seabream Sparus aurata was fed with bivalve mussel Mytilus galloprovincialis, contaminated by a toxic strain of O. cf. ovata. Mussels exposed to O. cf. ovata for 21 days accumulated meanly 188 ± 13 μg/kg OVTXs in the whole tissues. Seabreams fed with OVTX-contaminated mussels started to reject the food after 6 days of contaminated diet. Although no detectable levels of OVTXs were measured in muscle, liver, gills and gastro-intestinal tracts, the OVTX-enriched diet induced alterations of lipid metabolism in seabreams livers, displaying a decreased content of total lipid and fatty acid, together with overexpression of fatty acid biosynthetic genes, downregulation of β-oxidation genes and modulation of several genes related to lipid transport and regulation. Results from this study would suggest the hypothesis that OVTXs produced by O. cf. ovata may not be subject to bioaccumulation in fish fed on contaminated preys, being however responsible of significant biological effects, with important implications for human consumption of seafood products.
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Affiliation(s)
- Maria Elisa Giuliani
- Istituto Zooprofilattico Sperimentale Umbria e Marche "Togo Rosati", Via Cupa di Posatora 3, 60131 Ancona, AN, Italy
| | - Simone Bacchiocchi
- Istituto Zooprofilattico Sperimentale Umbria e Marche "Togo Rosati", Via Cupa di Posatora 3, 60131 Ancona, AN, Italy
| | - Stefano Accoroni
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Melania Siracusa
- Istituto Zooprofilattico Sperimentale Umbria e Marche "Togo Rosati", Via Cupa di Posatora 3, 60131 Ancona, AN, Italy
| | - Debora Campacci
- Istituto Zooprofilattico Sperimentale Umbria e Marche "Togo Rosati", Via Cupa di Posatora 3, 60131 Ancona, AN, Italy
| | - Valentina Notarstefano
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Marica Mezzelani
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Arianna Piersanti
- Istituto Zooprofilattico Sperimentale Umbria e Marche "Togo Rosati", Via Cupa di Posatora 3, 60131 Ancona, AN, Italy
| | - Cecilia Totti
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Maura Benedetti
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy; NBFC, National Biodiversity Future Center, Palermo 90133, Italy
| | - Francesco Regoli
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy; NBFC, National Biodiversity Future Center, Palermo 90133, Italy
| | - Stefania Gorbi
- Dipartimento di Scienze della Vita e dell'Ambiente, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy; NBFC, National Biodiversity Future Center, Palermo 90133, Italy.
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Grigoriyan A, Lorini ML, Figueiredo MDSL, Corrêa Almada EV, Nascimento SM. Effects of culture conditions on the growth of the benthic dinoflagellates Ostreopsis cf. ovata, Prorocentrum lima and Coolia malayensis (Dinophyceae): A global review. HARMFUL ALGAE 2024; 132:102565. [PMID: 38331537 DOI: 10.1016/j.hal.2023.102565] [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: 04/29/2023] [Revised: 11/30/2023] [Accepted: 12/23/2023] [Indexed: 02/10/2024]
Abstract
Benthic dinoflagellates produce potent toxins that may negatively affect humans and the marine biota. Understanding the factors that stimulate their growth is important for management strategies and to reduce their potential negative impacts. Laboratory cultures have been extensively used to study microalgae physiology and characterize life cycles, nutrition, growth rates, among other processes. A systematic review of the literature on the growth parameters of the benthic dinoflagellates Ostreopsis cf. ovata, Prorocentrum lima species complex and Coolia malayensis obtained in laboratory cultures of strains isolated from all over the world was performed. The effects of temperature, light intensity, photoperiod, salinity and culture media on the growth rate of these species were evaluated using multiple regressions and a model selection approach, based on the Akaike Information Criteria (AIC). The potential effects of the initial culture abundance and the media volume used on the growth of the species were also assessed. Data from 50 articles (25 for O. cf. ovata, 21 for P. lima and 6 for C. malayensis), resulting in 399 growth parameter values (growth rate, doubling time and maximum yield) were compiled in a database. The genetic clades of O. cf. ovata and P. lima species complex were also noted. Growth rate was the most frequently reported growth parameter for the three species, and 127 values were retrieved for O. cf. ovata, 90 for P. lima and 56 for C. malayensis. Temperature was the factor that best explained the growth response of P. lima and C. malayensis, whereas for O. cf. ovata, temperature and salinity were equally important. Light intensity and photoperiod were included among the six best models for the studied species but presented a weaker effect on growth. Given the observed and future projected climate change, increasing ocean temperature will promote the growth of these species, likely leading to an expansion of their impacts on ecosystems and human health. The use of common garden experiments using multiple strains from different geographic domains, particularly addressing underrepresented lineages is recommended, as they will provide more balanced insight regarding the species physiological responses to environmental drivers.
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Affiliation(s)
- Alexandra Grigoriyan
- Laboratório de Microalgas Marinhas, Universidade Federal do Estado do Rio de Janeiro - UNIRIO, Av. Pasteur, 458, Urca, Rio de Janeiro, 22290-240, RJ, Brazil
| | - Maria Lucia Lorini
- Laboratório de Ecologia e Biogeografia, Universidade Federal do Estado do Rio de Janeiro - UNIRIO, Av. Pasteur, 458, Urca, Rio de Janeiro, 22290-240, RJ, Brazil
| | - Marcos de Souza Lima Figueiredo
- Laboratório de Ecologia e Biogeografia, Universidade Federal do Estado do Rio de Janeiro - UNIRIO, Av. Pasteur, 458, Urca, Rio de Janeiro, 22290-240, RJ, Brazil
| | | | - Silvia M Nascimento
- Laboratório de Microalgas Marinhas, Universidade Federal do Estado do Rio de Janeiro - UNIRIO, Av. Pasteur, 458, Urca, Rio de Janeiro, 22290-240, RJ, Brazil.
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Ibghi M, Rijal Leblad B, L’Bachir El Kbiach M, Aboualaalaa H, Daoudi M, Masseret E, Le Floc’h E, Hervé F, Bilien G, Chomerat N, Amzil Z, Laabir M. Molecular Phylogeny, Morphology, Growth and Toxicity of Three Benthic Dinoflagellates Ostreopsis sp. 9, Prorocentrum lima and Coolia monotis Developing in Strait of Gibraltar, Southwestern Mediterranean. Toxins (Basel) 2024; 16:49. [PMID: 38251265 PMCID: PMC10819257 DOI: 10.3390/toxins16010049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 01/11/2024] [Accepted: 01/12/2024] [Indexed: 01/23/2024] Open
Abstract
Few works have been carried out on benthic harmful algal blooms (BHAB) species in the southern Mediterranean and no data are available for the highly dynamic Strait of Gibraltar (western Mediterranean waters). For the first time, Ostreopsis sp. 9, Prorocentrum lima and Coolia monotis were isolated in this key region in terms of exchanges between the Atlantic Ocean and the Mediterranean and subject to intense maritime traffic. Ribotyping confirmed the morphological identification of these three dinoflagellates species. Monoclonal cultures were established and the maximum growth rate and cell yield were measured at a temperature of 24 °C and an irradiance of 90 µmol photons m-2 s-1, for each species: 0.26 ± 0.02 d-1 (8.75 × 103 cell mL-1 after 28 days) for Ostreopsis sp. 9, 0.21 ± 0.01 d-1 (49 × 103 cell mL-1 after 145 days) for P. lima and 0.21 ± 0.01 d-1 (10.02 × 103 cell mL-1 after 28 days) for C. monotis. Only P. lima was toxic with concentrations of okadaic acid and dinophysistoxin-1 measured in optimal growth conditions ranging from 6.4 pg cell-1 to 26.97 pg cell-1 and from 5.19 to 25.27 pg cell-1, respectively. The toxin content of this species varied in function of the growth phase. Temperature influenced the growth and toxin content of P. lima. Results suggest that future warming of Mediterranean coastal waters may lead to higher growth rates and to increases in cellular toxin levels in P. lima. Nitrate and ammonia affected the toxin content of P. lima but no clear trend was noted. In further studies, we have to isolate other BHAB species and strains from Strait of Gibraltar waters to obtain more insight into their diversity and toxicity.
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Affiliation(s)
- Mustapha Ibghi
- Marine Environment Monitoring Laboratory, INRH (Moroccan Institute of Fisheries Research), Tangier 90000, Morocco; (M.I.); (H.A.); (M.D.)
- Equipe de Biotechnologie Végétale, Faculty of Sciences, Abdelmalek Essaadi University Tetouan, Tetouan 93000, Morocco;
- MARBEC, University of Montpellier, CNRS, IRD, Ifremer, 34095 Montpellier, France; (E.M.); (E.L.F.)
| | - Benlahcen Rijal Leblad
- Marine Environment Monitoring Laboratory, INRH (Moroccan Institute of Fisheries Research), Tangier 90000, Morocco; (M.I.); (H.A.); (M.D.)
| | - Mohammed L’Bachir El Kbiach
- Equipe de Biotechnologie Végétale, Faculty of Sciences, Abdelmalek Essaadi University Tetouan, Tetouan 93000, Morocco;
| | - Hicham Aboualaalaa
- Marine Environment Monitoring Laboratory, INRH (Moroccan Institute of Fisheries Research), Tangier 90000, Morocco; (M.I.); (H.A.); (M.D.)
- Equipe de Biotechnologie Végétale, Faculty of Sciences, Abdelmalek Essaadi University Tetouan, Tetouan 93000, Morocco;
- MARBEC, University of Montpellier, CNRS, IRD, Ifremer, 34095 Montpellier, France; (E.M.); (E.L.F.)
| | - Mouna Daoudi
- Marine Environment Monitoring Laboratory, INRH (Moroccan Institute of Fisheries Research), Tangier 90000, Morocco; (M.I.); (H.A.); (M.D.)
| | - Estelle Masseret
- MARBEC, University of Montpellier, CNRS, IRD, Ifremer, 34095 Montpellier, France; (E.M.); (E.L.F.)
| | - Emilie Le Floc’h
- MARBEC, University of Montpellier, CNRS, IRD, Ifremer, 34095 Montpellier, France; (E.M.); (E.L.F.)
| | - Fabienne Hervé
- Laboratoire Phycotoxines, IFREMER (French Research Institute for Exploitation of the Sea)/PHYTOX/METALG, 44311 Nantes, France; (F.H.); (Z.A.)
| | - Gwenael Bilien
- IFREMER, Unité Littoral, Station de Biologie Marine, Place de la Croix, 29185 Concarneau, France; (G.B.); (N.C.)
| | - Nicolas Chomerat
- IFREMER, Unité Littoral, Station de Biologie Marine, Place de la Croix, 29185 Concarneau, France; (G.B.); (N.C.)
| | - Zouher Amzil
- Laboratoire Phycotoxines, IFREMER (French Research Institute for Exploitation of the Sea)/PHYTOX/METALG, 44311 Nantes, France; (F.H.); (Z.A.)
| | - Mohamed Laabir
- MARBEC, University of Montpellier, CNRS, IRD, Ifremer, 34095 Montpellier, France; (E.M.); (E.L.F.)
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9
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Tang JQ, Shen QH, Han YY, Wu Y, He XF, Li DW, Huang Y. Analysis of research status and trends on marine benthic dinoflagellate toxins: A bibliometric study based on web of science database and VOSviewer. ENVIRONMENTAL RESEARCH 2023; 238:117179. [PMID: 37748671 DOI: 10.1016/j.envres.2023.117179] [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: 07/28/2023] [Revised: 09/12/2023] [Accepted: 09/19/2023] [Indexed: 09/27/2023]
Abstract
Marine benthic dinoflagellate toxins, potent bioactive compounds with wide-ranging presence in marine ecosystems, have surged in response to global climate change and human activities, prompting an urgent and imperative inquiry. This study conducts an in-depth review of contemporary research concerning these toxins, employing meticulous bibliometric analysis. Leveraging a dataset of 736 relevant literatures sourced from the Web of Science (spanning from 2000 to May 2023), our analysis delves comprehensively into the scientific discourse surrounding these toxic compounds. Employing tools such as VOSviewer, co-citation analysis, co-occurrence analysis, and cluster analysis, our study yields nuanced insights into the intricate characteristics and trajectories of the field. The co-citation analysis underscores the pivotal role played by benthic and epiphytic dinoflagellates like Ostreopsis and Gambierdiscus in shaping prevailing research trends. Our study identifies four distinct research directions, encompassing the domains of ecology, toxicology, toxin production, and taxonomy. Moreover, it traces the evolutionary journey of research stages, marking the transition from a focus on taxonomy to an emphasis on unraveling molecular mechanisms. The culmination of our comprehensive analysis yields three pertinent research recommendations: a call for widescale global studies, the advancement of rapid toxin monitoring techniques, and a deeper exploration of the factors influencing toxin synthesis and toxicity. These findings provide invaluable insights to researchers grappling with the complex realm of harmful algal blooms and substantially enrich the understanding of this pivotal and pressing field.
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Affiliation(s)
- Jing-Qian Tang
- Department of Subject Service and Consultation, Jinan University Library, Guangzhou, 510632, China
| | - Qian-Hui Shen
- Department of Subject Service and Consultation, Jinan University Library, Guangzhou, 510632, China
| | - Yao-Yao Han
- Department of Subject Service and Consultation, Jinan University Library, Guangzhou, 510632, China
| | - Yang Wu
- Department of Subject Service and Consultation, Jinan University Library, Guangzhou, 510632, China
| | - Xiang-Feng He
- Library of Zhuhai Campus, Jinan University, Zhuhai, 519070, China
| | - Da-Wei Li
- Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou, 510632, China.
| | - Yong Huang
- Library of Zhuhai Campus, Jinan University, Zhuhai, 519070, China.
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10
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Amzil Z, Derrien A, Terre Terrillon A, Savar V, Bertin T, Peyrat M, Duval A, Lhaute K, Arnich N, Hort V, Nicolas M. Five Years Monitoring the Emergence of Unregulated Toxins in Shellfish in France (EMERGTOX 2018-2022). Mar Drugs 2023; 21:435. [PMID: 37623716 PMCID: PMC10456248 DOI: 10.3390/md21080435] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 08/26/2023] Open
Abstract
Shellfish accumulate microalgal toxins, which can make them unsafe for human consumption. In France, in accordance with EU regulations, three groups of marine toxins are currently under official monitoring: lipophilic toxins, saxitoxins, and domoic acid. Other unregulated toxin groups are also present in European shellfish, including emerging lipophilic and hydrophilic marine toxins (e.g., pinnatoxins, brevetoxins) and the neurotoxin β-N-methylamino-L-alanine (BMAA). To acquire data on emerging toxins in France, the monitoring program EMERGTOX was set up along the French coasts in 2018. Three new broad-spectrum LC-MS/MS methods were developed to quantify regulated and unregulated lipophilic and hydrophilic toxins and the BMAA group in shellfish (bivalve mollusks and gastropods). A single-laboratory validation of each of these methods was performed. Additionally, these specific, reliable, and sensitive operating procedures allowed the detection of groups of EU unregulated toxins in shellfish samples from French coasts: spirolides (SPX-13-DesMeC, SPX-DesMeD), pinnatoxins (PnTX-G, PnTX-A), gymnodimines (GYM-A), brevetoxins (BTX-2, BTX-3), microcystins (dmMC-RR, MC-RR), anatoxin, cylindrospermopsin and BMAA/DAB. Here, we present essentially the results of the unregulated toxins obtained from the French EMERGTOX monitoring plan during the past five years (2018-2022). Based on our findings, we outline future needs for monitoring to protect consumers from emerging unregulated toxins.
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Affiliation(s)
- Zouher Amzil
- IFREMER (French Research Institute for Exploitation of the Sea)/PHYTOX/METALG, F-44311 Nantes, France; (V.S.); (K.L.)
| | - Amélie Derrien
- IFREMER/LITTORAL/LER-BO, F-29900 Concarneau, France; (A.D.); (A.T.T.); (A.D.)
| | | | - Véronique Savar
- IFREMER (French Research Institute for Exploitation of the Sea)/PHYTOX/METALG, F-44311 Nantes, France; (V.S.); (K.L.)
| | - Thomas Bertin
- Laboratory for Food Safety, Pesticides and Marine Biotoxins Unit, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 94701 Maisons-Alfort, France; (T.B.); (M.P.); (V.H.); (M.N.)
| | - Marion Peyrat
- Laboratory for Food Safety, Pesticides and Marine Biotoxins Unit, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 94701 Maisons-Alfort, France; (T.B.); (M.P.); (V.H.); (M.N.)
| | - Audrey Duval
- IFREMER/LITTORAL/LER-BO, F-29900 Concarneau, France; (A.D.); (A.T.T.); (A.D.)
| | - Korian Lhaute
- IFREMER (French Research Institute for Exploitation of the Sea)/PHYTOX/METALG, F-44311 Nantes, France; (V.S.); (K.L.)
| | - Nathalie Arnich
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 94701 Maisons-Alfort, France;
| | - Vincent Hort
- Laboratory for Food Safety, Pesticides and Marine Biotoxins Unit, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 94701 Maisons-Alfort, France; (T.B.); (M.P.); (V.H.); (M.N.)
| | - Marina Nicolas
- Laboratory for Food Safety, Pesticides and Marine Biotoxins Unit, French Agency for Food, Environmental and Occupational Health and Safety (ANSES), 94701 Maisons-Alfort, France; (T.B.); (M.P.); (V.H.); (M.N.)
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11
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Lim CC, Yoon J, Reynolds K, Gerald LB, Ault AP, Heo S, Bell ML. Harmful algal bloom aerosols and human health. EBioMedicine 2023; 93:104604. [PMID: 37164781 PMCID: PMC10363441 DOI: 10.1016/j.ebiom.2023.104604] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 03/17/2023] [Accepted: 04/20/2023] [Indexed: 05/12/2023] Open
Abstract
Harmful algal blooms (HABs) are increasing across many locations globally. Toxins from HABs can be incorporated into aerosols and transported inland, where subsequent exposure and inhalation can induce adverse health effects. However, the relationship between HAB aerosols and health outcomes remains unclear despite the potential for population-level exposures. In this review, we synthesized the current state of knowledge and identified evidence gaps in the relationship between HAB aerosols and human health. Aerosols from Karenia brevis, Ostreopsis sp., and cyanobacteria were linked with respiratory outcomes. However, most works did not directly measure aerosol or toxin concentrations and instead relied on proxy metrics of exposure, such as cell concentrations in nearby waterbodies. Furthermore, the number of studies with epidemiological designs was limited. Significant uncertainties remain regarding the health effects of other HAB species; threshold dose and the dose-response relationship; effects of concurrent exposures to mixtures of toxins and other aerosol sources, such as microplastics and metals; the impact of long-term exposures; and disparities in exposures and associated health effects across potentially vulnerable subpopulations. Additional studies employing multifaceted exposure assessment methods and leveraging large health databases could address such gaps and improve our understanding of the public health burden of HABs.
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Affiliation(s)
- Chris C Lim
- Zuckerman College of Public Health, The University of Arizona, Tucson, Arizona, USA.
| | - Jeonggyo Yoon
- Zuckerman College of Public Health, The University of Arizona, Tucson, Arizona, USA
| | - Kelly Reynolds
- Zuckerman College of Public Health, The University of Arizona, Tucson, Arizona, USA
| | - Lynn B Gerald
- Population Health Sciences Program, Office of the Vice Chancellor for Health Affairs, University of Illinois Chicago, Chicago, Illinois, USA
| | - Andrew P Ault
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Seulkee Heo
- School of the Environment, Yale University, New Haven, Connecticut, USA
| | - Michelle L Bell
- School of the Environment, Yale University, New Haven, Connecticut, USA
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12
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Medina-Pérez NI, Santos FJ, Berdalet E, Moyano E. Multiply charged ion profiles in the UHPLC-HRMS analysis of palytoxin analogues from Ostreopsis cf. ovata blooms. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:1355-1364. [PMID: 36847157 PMCID: PMC10633106 DOI: 10.1039/d2ay02019j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Analogues of palytoxin (PLTX), one of the most potent marine biotoxins, are produced by some species of the marine dinoflagellates of the genus Ostreopsis. The proliferation of these species in different coastal zones represents a potential threat of seafood poisoning in humans because the produced toxins can be transferred through marine food webs. Thus, the determination of the concentration of PLTX analogues (ovatoxins-OVTXs, ostreocins-OSTs and isobaric PLTX) in different matrices (seawater, marine fauna, etc.) is necessary to protect human health. This study is addressed to overcome some of the challenges that the chemical complexity of these molecules poses to their quantification by ultra-high-performance liquid chromatography high-resolution mass spectrometry-based techniques (UHPLC-HRMS). In particular, the mass spectra of the palytoxin analogues show the presence of a large number of ions (including mono- and multiply charged ions) whose nature, relative abundances and behavior can lead to quantitation errors if the correct ions are not selected. In this work, the variability of the PLTX and OVTX profiles under different instrument conditions, including the use of diverse electrospray generation sources and different quantitation methods, is studied. Moreover, the extraction protocol in seawater containing Ostreopsis sp. ovata cells is also evaluated. The use of a heated electrospray operating at 350 °C and a quantitative method including ions from different multiply charged species provides a more robust and reliable method for overcoming the problems due to the variability in the toxin's mass spectrum profile. A single MeOH : H2O (80 : 20, v/v) extraction is proposed as the best and reliable procedure. The overall method proposed was applied to quantify OVTXs (-a to -g) and iso-PLTX along the 2019 Ostreopsis cf. ovata bloom. The cells contained a total toxin concentration of up to 20.39 pg per cell.
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Affiliation(s)
- Noemí Inmaculada Medina-Pérez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Barcelona, Spain.
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Barcelona, Spain
| | - Francisco Javier Santos
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Barcelona, Spain.
- Water Research Institute (IdRA), University of Barcelona, Barcelona, Spain
| | - Elisa Berdalet
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Barcelona, Spain
| | - Encarnación Moyano
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Barcelona, Spain.
- Water Research Institute (IdRA), University of Barcelona, Barcelona, Spain
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13
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Medina-Pérez NI, Cerdán-García E, Rubió F, Viure L, Estrada M, Moyano E, Berdalet E. Progress on the Link between Nutrient Availability and Toxin Production by Ostreopsis cf. ovata: Field and Laboratory Experiments. Toxins (Basel) 2023; 15:toxins15030188. [PMID: 36977079 PMCID: PMC10057244 DOI: 10.3390/toxins15030188] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/27/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
This study aimed to improve the understanding of the nutrient modulation of Ostreopsis cf. ovata toxin content. During the 2018 natural bloom in the NW Mediterranean, the total toxin content (up to ca. 57.6 ± 7.0 pg toxin cell−1) varied markedly. The highest values often coincided with elevated O. cf. ovata cell abundance and with low inorganic nutrient concentrations. The first culture experiment with a strain isolated from that bloom showed that cell toxin content was higher in the stationary than in the exponential phase of the cultures; phosphate- and nitrate-deficient cells exhibited similar cell toxin variability patterns. The second experiment with different conditions of nitrogen concentration and source (nitrate, urea, ammonium, and fertilizer) presented the highest cellular toxin content in the high-nitrogen cultures; among these, urea induced a significantly lower cellular toxin content than the other nutrient sources. Under both high- and low-nitrogen concentrations, cell toxin content was also higher in the stationary than in the exponential phase. The toxin profile of the field and cultured cells included ovatoxin (OVTX) analogues -a to -g and isobaric PLTX (isoPLTX). OVTX-a and -b were dominant while OVTX-f, -g, and isoPLTX contributed less than 1-2%. Overall, the data suggest that although nutrients determine the intensity of the O. cf. ovata bloom, the relationship of major nutrient concentrations, sources and stoichiometry with cellular toxin production is not straightforward.
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Affiliation(s)
- Noemí Inmaculada Medina-Pérez
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Av. Diagonal 645, E-08028 Barcelona, Spain
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
| | - Elena Cerdán-García
- Aix Marseille Université, Université de Toulon, CNRS, IRD, MIO UM 110, 13288 Marseille, France
| | - Francesc Rubió
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
| | - Laia Viure
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
| | - Marta Estrada
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
| | - Encarnación Moyano
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Av. Diagonal 645, E-08028 Barcelona, Spain
- Water Research Institute (IdRA), University of Barcelona, Montalegre 6, E-08001 Barcelona, Spain
| | - Elisa Berdalet
- Department of Marine Biology and Oceanography, Institute of Marine Sciences (ICM-CSIC), Pg. Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain
- Correspondence:
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14
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Rapid Biotic and Abiotic Transformation of Toxins produced by Ostreopsis. cf. ovata. Mar Drugs 2022; 20:md20120748. [PMID: 36547895 PMCID: PMC9787646 DOI: 10.3390/md20120748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/10/2022] [Accepted: 11/18/2022] [Indexed: 11/29/2022] Open
Abstract
The dinoflagellate Ostreopsis cf. ovata produces several families of toxic polyketides. Despite only a few field measurements of these phycotoxins in seawater and aerosols, they are believed to be responsible for dermatitis and the toxic inhalations reported during blooms of this species. Therefore, the stability of these compounds in seawater is essential to understanding the causes of these symptoms, however, this has never been assessed. In the current study, the optimization of a solid phase extraction (SPE) procedure was first performed to ensure the most efficient extraction of all phycotoxins known to be produced by this strain, including the recently described liguriatoxins. The SPE cartridge SDBL® under non acidified conditions offered the best option. The stability of the ovatoxins and the liguriatoxins under biotic and abiotic stress was assessed by exposing the spent medium of a culture of Ostreopsis cf. ovata to its bacterial consortium and natural sunlight. A rapid biotic transformation was detected for both families of compounds. When exposed to bacteria, the half-lives of the ovatoxins were reached before 10 h and at 36 h, 97% of these toxins had been transformed. The half-lives of the liguriatoxins were 10 h under these conditions. Photolysis (abiotic degradation) of the ovatoxins (T1/2 < 36 h) was faster than for the liguriatoxins (T1/2 > 62 h). Although none of the catabolites of these phycotoxins were thoroughly identified, an untargeted metabolomics approach combined with molecular networking highlighted the presence of several compounds exhibiting structural similarities with the ovatoxins. Additional work should confirm the preliminary findings on these potential ovatoxins’ catabolites and their biological properties. The rapid transformation of O. cf. ovata’s phycotoxins introduces questions concerning their presence in seawater and their dispersion in the sea spray aerosols. The compounds involved in the toxic inhalations and dermatitis often experienced by beachgoers may stem from the catabolites of these toxins or even unrelated and as yet unidentified compounds.
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15
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Berdalet E, Pavaux AS, Abós-Herràndiz R, Travers M, Appéré G, Vila M, Thomas J, de Haro L, Estrada M, Medina-Pérez NI, Viure L, Karlson B, Lemée R. Environmental, human health and socioeconomic impacts of Ostreopsis spp. Blooms in the NW Mediterranean. HARMFUL ALGAE 2022; 119:102320. [PMID: 36344192 DOI: 10.1016/j.hal.2022.102320] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/30/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
This paper summarizes the research conducted by the partners of the EU co-funded CoCliME project to ascertain the ecological, human health and economic impacts of Ostreopsis (mainly O. cf. ovata) blooms in the NW Mediterranean coasts of France, Monaco and Spain. This knowledge is necessary to design strategies to prevent, mitigate and, if necessary, adapt to the impacts of these events in the future and in other regions. Ostreopsis proliferations in the Mediterranean have been related to massive mortalities of benthic organisms and to symptoms of respiratory and cutaneous irritation in humans. A six-year epidemiologic study in a Ostreopsis hot spot in Catalonia and the accumulated experience of the French Mediterranean National Ostreopsis Surveillance Network confirm the main effects of these blooms on human health in the NW Mediterranean. The impacts are associated to direct exposure to seawater with high Ostreopsis cell concentrations and to inhalation of aerosols containing unknown irritative chemicals produced under certain circumstances during the blooms. A series of mild acute symptoms, affecting the entire body as well as the ophthalmic, digestive, respiratory and dermatologic systems have been identified. A main remaining challenge is to ascertain the effects of the chronic exposure to toxic Ostreopsis blooms. Still, the mechanisms involved in the deletereous effects of Ostreopsis blooms are poorly understood. Characterizing the chemical nature of the harmful compounds synthesized by Ostreopsis as well as the role of the mucus by which cells attach to benthic surfaces, requires new technical approaches (e.g., metabolomics) and realistic and standardized ecotoxicology tests. It is also necessary to investigate how palytoxin analogues produced by O. cf. ovata could be transferred through the marine food webs, and to evaluate the real risk of seafood poisonings in the area. On the other hand, the implementation of beach monitoring and surveillance systems in the summer constitutes an effective strategy to prevent the impacts of Ostreopsis on human health. In spite of the confirmed noxious effects, a survey of tourists and residents in Nice and Monaco to ascertain the socioeconomic costs of Ostreopsis blooms indicated that the occurrence of these events and their impacts are poorly known by the general public. In relationship with a plausible near future increase of Ostreopsis blooms in the NW Mediterranean coast, this survey showed that a substantial part of the population might continue to go to the beaches during Ostreopsis proliferations and thus could be exposed to health risks. In contrast, some people would not visit the affected areas, with the potential subsequent negative impacts on coastal recreational and touristic activities. However, at this stage, it is too early to accurately assess all the economic impacts that a potentially increasing frequency and biogeographic expansion of the events might cause in the future.
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Affiliation(s)
- Elisa Berdalet
- Institute of Marine Sciences (ICM-CSIC), Passeig Marítim de la Barceloneta, 37-49, Barcelona, Catalonia 08003, Spain.
| | - Anne-Sophie Pavaux
- Laboratoire d'Océanographie de Villefranche, Sorbonne Université - CNRS, UMR 7093, 181 Chemin du Lazaret, Villefranche-sur-mer 06230, France
| | - Rafael Abós-Herràndiz
- Departament de la Salut, Institut Català de la Salut, Generalitat de Catalunya, Spain
| | - Muriel Travers
- LEMNA, Institute of Economics and Management of Nantes, Nantes University, Chemin de la Censive du Tertre, BP 52231, Cedex 3, Nantes 44322, France
| | - Gildas Appéré
- GRANEM, Faculty of Law, Economics and Management, University of Angers, 13 allée François Mitterrand, BP 13633, CEDEX 01, Angers 49036, France
| | - Magda Vila
- Institute of Marine Sciences (ICM-CSIC), Passeig Marítim de la Barceloneta, 37-49, Barcelona, Catalonia 08003, Spain
| | - Jérémy Thomas
- LEMNA, Institute of Economics and Management of Nantes, Nantes University, Chemin de la Censive du Tertre, BP 52231, Cedex 3, Nantes 44322, France
| | - Luc de Haro
- Clinical Pharmacology and Poison Control Centre, APHM, Hôpital Sainte Marguerite, Marseille 13009, France
| | - Marta Estrada
- Institute of Marine Sciences (ICM-CSIC), Passeig Marítim de la Barceloneta, 37-49, Barcelona, Catalonia 08003, Spain
| | - Noemí Inmaculada Medina-Pérez
- Institute of Marine Sciences (ICM-CSIC), Passeig Marítim de la Barceloneta, 37-49, Barcelona, Catalonia 08003, Spain; Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Avinguda Diagonal 645, Barcelona, Catalonia 08028, Spain
| | - Laia Viure
- Institute of Marine Sciences (ICM-CSIC), Passeig Marítim de la Barceloneta, 37-49, Barcelona, Catalonia 08003, Spain
| | - Bengt Karlson
- Swedish Meteorological and Hydrological Institute, Research and Development, Oceanography, Sven Källfelts gata 15, Västra Frölunda SE-426 71, Sweden
| | - Rodolphe Lemée
- Laboratoire d'Océanographie de Villefranche, Sorbonne Université - CNRS, UMR 7093, 181 Chemin du Lazaret, Villefranche-sur-mer 06230, France
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