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Lin ZR, Geng HX, Yu RC. Potential roles of hydroxybenzoate paralytic shellfish toxins in modulating toxin biokinetics in scallops. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:133896. [PMID: 38428300 DOI: 10.1016/j.jhazmat.2024.133896] [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: 10/20/2023] [Revised: 02/06/2024] [Accepted: 02/24/2024] [Indexed: 03/03/2024]
Abstract
Paralytic shellfish toxins (PSTs) produced by some marine dinoflagellates can cause severe human intoxication via vectors like bivalves. Toxic dinoflagellate Gymnodinium catenatum produce a novel group of hydroxybenzoate PSTs named GC toxins, but their biokinetics in bivalves haven't been well examined. In this experiment, we analyzed PSTs in bay scallops Argopecten irradians exposed to G. catenatum (strain MEL11) to determine their accumulation, elimination, anatomical distribution, and biotransformation. To our surprise, up to 30% of the PSTs were accumulated in the adductor muscle of scallops at the end of the experiment, and the toxicity of adductor muscle exceeded the regulatory limit of 800 μg STXeq/kg in only 6 days. High concentration of toxins in the adductor muscle are likely linked to the rapid transfer of GC toxins from viscera to other tissues. Moreover, most GC toxins in scallops were found rapidly transformed to decarbamoyl toxins through enzyme-mediated hydrolysis, which was further supported by the in vitro incubation experiments. Our study demonstrates that GC toxins actively participate in toxin distribution and transformation in scallops, which may increase the risks of food poisoning associated with the consumption of scallop adductor muscle. ENVIRONMENTAL IMPLICATION: The negative impacts of harmful algal blooms (HABs) have become a global environmental concern under the joint effects of cultural eutrophication and climate change. Our study, targeted on the biokinetics of paralytic shellfish toxins in scallops exposed to Gymnodinium catenatum producing unique GC toxins, aims to elucidate potential risks of seafood poisoning associated with GC toxins. The findings of this study will help us to understand the roles of GC toxins in seafood poisoning, and to develop effective management strategies against toxic algal blooms and phycotoxins.
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Affiliation(s)
- Zhuo-Ru Lin
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Hui-Xia Geng
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Ren-Cheng Yu
- CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; University of Chinese Academy of Sciences, Beijing 100039, China.
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2
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Cao P, Zhang L, Huang Y, Li S, Wang X, Pan F, Yu X, Sun J, Liang J, Zhou P, Xu X. Contamination Status and Acute Dietary Exposure Assessment of Paralytic Shellfish Toxins in Shellfish in the Dalian Area of the Yellow-Bohai Sea, China. Foods 2024; 13:361. [PMID: 38338497 PMCID: PMC10855875 DOI: 10.3390/foods13030361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/11/2024] [Accepted: 01/12/2024] [Indexed: 02/12/2024] Open
Abstract
The Yellow-Bohai Sea is an important semi-enclosed continental shelf marginal seas with an intensive aquaculture industry in China. The current study analyzed the contamination status and the time variations of paralytic shellfish toxins (PSTs) in shellfish between 2019 and 2020 from the Yellow-Bohai Sea in the Dalian area and estimated the acute health risks to consumers in China. A total of 199 shellfish samples (including 34 Pacific oysters, 25 Mediterranean blue mussels, 34 Manila clams, 36 bay scallops, 34 veined rapa whelks and 36 bloody clams) were analyzed from four representative aquaculture zones around the Yellow-Bohai Sea in Dalian. Among the samples, scallops and blood clams were the shellfish species with the highest detection rate of PSTs (94.4%), and the highest level of PSTs was detected in scallops with 3953.5 μg STX.2HCl eq./kg (μg STX.2HCL equivalents per kg shellfish tissue), followed by blood clams with 993.4 μg STX.2HCl eq./kg. The contents of PSTs in shellfish showed a time variation trend, and autumn was the season of concern for PST contamination in Dalian. For general Chinese consumers, the probability of acute health risks to shellfish consumers from dietary exposure to PSTs was around 13%. For typical consumers in coastal areas of China, especially those with higher shellfish intake, there was an acute health risk associated with exposure to PSTs through shellfish consumption during the occurrence of harmful algal blooms. It is suggested that the government continue to strengthen the monitoring of the source of PSTs and the monitoring of harmful algal blooms and give reasonable advice on shellfish consumption for consumers in coastal areas, such as not eating scallop viscera.
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Affiliation(s)
- Pei Cao
- China National Center for Food Safety Risk Assessment, Beijing 100022, China; (P.C.); (L.Z.); (Y.H.); (X.W.); (F.P.); (J.L.)
| | - Lei Zhang
- China National Center for Food Safety Risk Assessment, Beijing 100022, China; (P.C.); (L.Z.); (Y.H.); (X.W.); (F.P.); (J.L.)
| | - Yaling Huang
- China National Center for Food Safety Risk Assessment, Beijing 100022, China; (P.C.); (L.Z.); (Y.H.); (X.W.); (F.P.); (J.L.)
- College of Food Science and Technology, HuNan Agricultural University, Changsha 410125, China
| | - Shuwen Li
- Department of Epidemiology and Biostatistics, School of Public Health, Southeast University, Nanjing 210009, China; (S.L.); (X.Y.); (J.S.)
| | - Xiaodan Wang
- China National Center for Food Safety Risk Assessment, Beijing 100022, China; (P.C.); (L.Z.); (Y.H.); (X.W.); (F.P.); (J.L.)
| | - Feng Pan
- China National Center for Food Safety Risk Assessment, Beijing 100022, China; (P.C.); (L.Z.); (Y.H.); (X.W.); (F.P.); (J.L.)
| | - Xiaojin Yu
- Department of Epidemiology and Biostatistics, School of Public Health, Southeast University, Nanjing 210009, China; (S.L.); (X.Y.); (J.S.)
| | - Jinfang Sun
- Department of Epidemiology and Biostatistics, School of Public Health, Southeast University, Nanjing 210009, China; (S.L.); (X.Y.); (J.S.)
| | - Jiang Liang
- China National Center for Food Safety Risk Assessment, Beijing 100022, China; (P.C.); (L.Z.); (Y.H.); (X.W.); (F.P.); (J.L.)
| | - Pingping Zhou
- China National Center for Food Safety Risk Assessment, Beijing 100022, China; (P.C.); (L.Z.); (Y.H.); (X.W.); (F.P.); (J.L.)
| | - Xiaomin Xu
- Zhe Jiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
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Pinto A, Botelho MJ, Churro C, Asselman J, Pereira P, Pereira JL. A review on aquatic toxins - Do we really know it all regarding the environmental risk posed by phytoplankton neurotoxins? JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118769. [PMID: 37597370 DOI: 10.1016/j.jenvman.2023.118769] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/24/2023] [Accepted: 08/09/2023] [Indexed: 08/21/2023]
Abstract
Aquatic toxins are potent natural toxins produced by certain cyanobacteria and marine algae species during harmful cyanobacterial and algal blooms (CyanoHABs and HABs, respectively). These harmful bloom events and the toxins produced during these events are a human and environmental health concern worldwide, with occurrence, frequency and severity of CyanoHABs and HABs being predicted to keep increasing due to ongoing climate change scenarios. These contexts, as well as human health consequences of some toxins produced during bloom events have been thoroughly reviewed before. Conversely, the wider picture that includes the non-human biota in the assessment of noxious effects of toxins is much less covered in the literature and barely covered by review works. Despite direct human exposure to aquatic toxins and related deleterious effects being responsible for the majority of the public attention to the blooms' problematic, it constitutes a very limited fraction of the real environmental risk posed by these toxins. The disruption of ecological and trophic interactions caused by these toxins in the aquatic biota building on deleterious effects they may induce in different species is paramount as a modulator of the overall magnitude of the environmental risk potentially involved, thus necessarily constraining the quality and efficiency of the management strategies that should be placed. In this way, this review aims at updating and consolidating current knowledge regarding the adverse effects of aquatic toxins, attempting to going beyond their main toxicity pathways in human and related models' health, i.e., also focusing on ecologically relevant model organisms. For conciseness and considering the severity in terms of documented human health risks as a reference, we restricted the detailed revision work to neurotoxic cyanotoxins and marine toxins. This comprehensive revision of the systemic effects of aquatic neurotoxins provides a broad overview of the exposure and the hazard that these compounds pose to human and environmental health. Regulatory approaches they are given worldwide, as well as (eco)toxicity data available were hence thoroughly reviewed. Critical research gaps were identified particularly regarding (i) the toxic effects other than those typical of the recognized disease/disorder each toxin causes following acute exposure in humans and also in other biota; and (ii) alternative detection tools capable of being early-warning signals for aquatic toxins occurrence and therefore provide better human and environmental safety insurance. Future directions on aquatic toxins research are discussed in face of the existent knowledge, with particular emphasis on the much-needed development and implementation of effective alternative (eco)toxicological biomarkers for these toxins. The wide-spanning approach followed herein will hopefully stimulate future research more broadly addressing the environmental hazardous potential of aquatic toxins.
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Affiliation(s)
- Albano Pinto
- CESAM - Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Portugal.
| | - Maria João Botelho
- IPMA, Portuguese Institute for the Sea and Atmosphere, Av. Alfredo Magalhães Ramalho 6, 1495-165, Algés, Portugal; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal
| | - Catarina Churro
- IPMA, Portuguese Institute for the Sea and Atmosphere, Av. Alfredo Magalhães Ramalho 6, 1495-165, Algés, Portugal; CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal
| | - Jana Asselman
- Blue Growth Research Lab, Ghent University, Bluebridge Building, Ostend Science Park 1, 8400, Ostend, Belgium
| | - Patrícia Pereira
- CESAM - Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Portugal
| | - Joana Luísa Pereira
- CESAM - Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, Portugal
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Finch SC, Webb NG, Boundy MJ, Harwood DT, Munday JS, Sprosen JM, Somchit C, Broadhurst RB. A Sub-Acute Dosing Study of Saxitoxin and Tetrodotoxin Mixtures in Mice Suggests That the Current Paralytic Shellfish Toxin Regulatory Limit Is Fit for Purpose. Toxins (Basel) 2023; 15:437. [PMID: 37505706 PMCID: PMC10467072 DOI: 10.3390/toxins15070437] [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: 04/19/2023] [Revised: 06/22/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023] Open
Abstract
Paralytic shellfish poisoning is a worldwide problem induced by shellfish contaminated with paralytic shellfish toxins. To protect human health, a regulatory limit for these toxins in shellfish flesh has been adopted by many countries. In a recent study, mice were dosed with saxitoxin and tetrodotoxin mixtures daily for 28 days showing toxicity at low concentrations, which appeared to be at odds with other work. To further investigate this reported toxicity, we dosed groups of mice with saxitoxin and tetrodotoxin mixtures daily for 21 days. In contrast to the previous study, no effects on mouse bodyweight, food consumption, heart rate, blood pressure, grip strength, blood chemistry or hematology were observed. Furthermore, no histological findings were associated with dosing in this trial. The dose rates in this study were 2.6, 3.8 and 4.9 times greater, respectively, than the highest dose of the previous study. As rapid mortality in three out of five mice was observed in the previous study, the deaths are likely to be due to the methodology used rather than the shellfish toxins. To convert animal data to that used in a human risk assessment, a 100-fold safety factor is required. After applying this safety factor, the dose rates used in the current study were 3.5, 5.0 and 6.5 times greater, respectively, than the acute reference dose for each toxin type set by the European Union. Furthermore, it has previously been proposed that tetrodotoxin be included in the paralytic shellfish poisoning suite of toxins. If this were done, the highest dose rate used in this study would be 13 times the acute reference dose. This study suggests that the previous 28-day trial was flawed and that the current paralytic shellfish toxin regulatory limit is fit for purpose. An additional study, feeding mice a diet laced with the test compounds at higher concentrations than those of the current experiment, would be required to comment on whether the current paralytic shellfish toxin regulatory limit should be modified.
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Affiliation(s)
- Sarah C. Finch
- AgResearch Ltd., Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (C.S.); (R.B.B.)
| | - Nicola G. Webb
- AgResearch Ltd., Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (C.S.); (R.B.B.)
| | - Michael J. Boundy
- Cawthron Institute, Private Bag 2, Nelson 7042, New Zealand; (M.J.B.); (D.T.H.)
| | - D. Tim Harwood
- Cawthron Institute, Private Bag 2, Nelson 7042, New Zealand; (M.J.B.); (D.T.H.)
| | - John S. Munday
- Department of Pathobiology, School of Veterinary Science, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand;
| | - Jan M. Sprosen
- AgResearch Ltd., Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (C.S.); (R.B.B.)
| | - Chanatda Somchit
- AgResearch Ltd., Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (C.S.); (R.B.B.)
| | - Ric B. Broadhurst
- AgResearch Ltd., Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (C.S.); (R.B.B.)
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Effects of Steaming on the Concentration, Distribution and Bioaccessibility of Cadmium in Chlamys farreri Tissues. Food Res Int 2022; 162:112126. [DOI: 10.1016/j.foodres.2022.112126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 10/26/2022] [Accepted: 11/06/2022] [Indexed: 11/14/2022]
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Goya AB, Baqer D, Alexander RP, Stubbs P, Dean K, Lewis AM, Coates L, Maskrey BH, Turner AD. Marine Biotoxins in Whole and Processed Scallops from the Argentine Sea. Mar Drugs 2022; 20:634. [PMID: 36286458 PMCID: PMC9604692 DOI: 10.3390/md20100634] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 11/17/2022] Open
Abstract
Harmful algal blooms are an increasing worldwide threat to the seafood industry and human health as a consequence of the natural production of biotoxins that can accumulate in shellfish. In the Argentine Sea, this has been identified as an issue for the offshore fisheries of Patagonian scallops (Zygochlamys patagonica), leading to potentially harmful effects on consumers. Here we assess spatial and temporal patterns in marine biotoxin concentrations in Patagonian scallops harvested in Argentinian waters between 2012-2017, based on analyses for paralytic shellfish toxins, lipophilic toxins, and amnesic shellfish toxins. There was no evidence for concentrations of lipophilic or amnesic toxins above regulatory acceptance thresholds, with trace concentrations of pectenotoxin 2, azaspiracid 2 and okadaic acid group toxins confirmed. Conversely, paralytic shellfish toxins were quantified in some scallops. Gonyautoxins 1 and 2 dominated the unusual toxin profiles (91%) in terms of saxitoxin equivalents with maximum concentrations reaching 3985 µg STX eq/kg and with changes in profiles linked in part to seasonal changes. Total toxin concentrations were compared between samples of the adductor muscle and whole tissue, with results showing the absence of toxins in the adductor muscle confirming toxin accumulation in the digestive tracts of the scallops and the absence of a human health threat following the processing of scallop adductor meat. These findings highlight that paralytic shellfish toxins with an unusual toxin profile can occur in relatively high concentrations in whole Patagonian scallops in specific regions and during particular time periods, also showing that the processing of scallops on board factory ships to obtain frozen adductor muscle is an effective management process that minimizes the risk of poisonings from final products destined for human consumption.
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Affiliation(s)
- Alejandra B. Goya
- Marine Biotoxin Department, Mar del Plata Regional Laboratory, National Service for Agri-food Health and Quality (Senasa), AvisoDorrego y Víctimas del ‘46, Puerto, Mar del Plata B7600, Buenos Aires Province, Argentina
| | - Danial Baqer
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, UK
- Department of Biological Sciences, University of Surrey, Stag Hill, Guildford GU2 7XH, UK
| | - Ryan P. Alexander
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, UK
| | - Patrycja Stubbs
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, UK
| | - Karl Dean
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, UK
| | - Adam M. Lewis
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, UK
| | - Lewis Coates
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, UK
| | - Benjamin H. Maskrey
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, UK
| | - Andrew D. Turner
- Centre for Environment, Fisheries and Aquaculture Science (Cefas), Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, UK
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Finch SC, Webb NG, Boundy MJ, Harwood DT, Munday JS, Sprosen JM, Cave VM, Broadhurst RB, Nicolas J. Sub-Acute Feeding Study of Saxitoxin to Mice Confirms the Effectiveness of Current Regulatory Limits for Paralytic Shellfish Toxins. Toxins (Basel) 2021; 13:toxins13090627. [PMID: 34564631 PMCID: PMC8473220 DOI: 10.3390/toxins13090627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/03/2021] [Accepted: 09/05/2021] [Indexed: 11/17/2022] Open
Abstract
Regulatory limits for shellfish toxins are required to protect human health. Often these limits are set using only acute toxicity data, which is significant, as in some communities, shellfish makes up a large proportion of their daily diet and can be contaminated with paralytic shellfish toxins (PSTs) for several months. In the current study, feeding protocols were developed to mimic human feeding behaviour and diets containing three dose rates of saxitoxin dihydrochloride (STX.2HCl) were fed to mice for 21 days. This yielded STX.2HCl dose rates of up to 730 µg/kg bw/day with no effects on food consumption, growth, blood pressure, heart rate, motor coordination, grip strength, blood chemistry, haematology, organ weights or tissue histology. Using the 100-fold safety factor to extrapolate from animals to humans yields a dose rate of 7.3 µg/kg bw/day, which is well above the current acute reference dose (ARfD) of 0.5 µg STX.2HCl eq/kg bw proposed by the European Food Safety Authority. Furthermore, to reach the dose rate of 7.3 µg/kg bw, a 60 or 70 kg human would have to consume 540 or 630 g of shellfish contaminated with PSTs at the current regulatory limit (800 µg/kg shellfish flesh), respectively. The current regulatory limit for PSTs therefore seems appropriate.
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Affiliation(s)
- Sarah C. Finch
- AgResearch Ltd. Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (V.M.C.); (R.B.B.)
- Correspondence:
| | - Nicola G. Webb
- AgResearch Ltd. Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (V.M.C.); (R.B.B.)
| | - Michael J. Boundy
- Cawthron Institute, Private Bag 2, Nelson 7042, New Zealand; (M.J.B.); (D.T.H.)
| | - D. Tim Harwood
- Cawthron Institute, Private Bag 2, Nelson 7042, New Zealand; (M.J.B.); (D.T.H.)
| | - John S. Munday
- Department of Pathobiology, School of Veterinary Science, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand;
| | - Jan M. Sprosen
- AgResearch Ltd. Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (V.M.C.); (R.B.B.)
| | - Vanessa M. Cave
- AgResearch Ltd. Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (V.M.C.); (R.B.B.)
| | - Ric B. Broadhurst
- AgResearch Ltd. Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand; (N.G.W.); (J.M.S.); (V.M.C.); (R.B.B.)
| | - Jeane Nicolas
- Ministry for Primary Industries–Manatu Ahu Matua, P.O. Box 2526, Wellington 6021, New Zealand;
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Xu F, Chen P, Yuan Y, Zhang S, Liu S, Fan M, Zhu C, Wang H, Yue W, Xu Y. Effects of steaming process on the distribution of arsenic in different tissues of the scallops (Chlamys farreri). Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Tobke J, Giarratano E, Ortiz A, Garrido C, Serra M, Gil MN, Navarro JM. Chitosan performance during Paralytic Shellfish Toxins (PST) depuration of Mytilus chilensis exposed to Alexandrium catenella. Toxicon 2021; 195:48-57. [PMID: 33722633 DOI: 10.1016/j.toxicon.2021.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 03/03/2021] [Accepted: 03/08/2021] [Indexed: 10/21/2022]
Abstract
Blooms of the dinoflagellate Alexandrium catenella, which produces Paralytic Shellfish Toxins (PST), generate serious socio-economic consequences for mariculture in Chile, especially for the production of Mytilus chilensis and other bivalves. Palliative strategies, such as the depuration of mussels in enriched water with chitosan offer encouraging prospects against the advance of contaminated areas and toxin persistence. Adult mussels were fed with A. catenella for 20 days and then were allowed to depurate using chitosan as facilitator, for the same period. Intoxicated mussels showed a reduction in feeding activity and rapid PST accumulation in 20 days (C = 451.5t + 1,673.6, R2 = 0.55 p = 0.008). Not enough evidence was found to indicate a positive effect of chitosan in mussel depuration after 20 days (C = -311.1t + 8,462.4, R2 = 0.8 p = 0.001). At the end of the study, toxicity was higher than 800 μg STX eq kg-1. C2 and GTX4 analogues were the most abundant in the dinoflagellate strain, while C2 and C1 were the most accumulated in mussels. The presence of C1 was notorious during depuration, as the persistence of GTX2,3. GTX5 was only detected in A. catenella, while STX was only present in mussels. Mussel sensitivity to the presence of the toxic dinoflagellate was observed in the present study. The biotransformation, selective elimination and epimerization processes were deduced from intoxication and depuration experiments.
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Affiliation(s)
- Jésica Tobke
- Centro para el Estudio de Sistemas Marinos (CESIMAR - CONICET), Puerto Madryn, Chubut, Argentina
| | - Erica Giarratano
- Centro para el Estudio de Sistemas Marinos (CESIMAR - CONICET), Puerto Madryn, Chubut, Argentina.
| | - Alejandro Ortiz
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Centro Fondap de Investigación Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Universidad Austral de Chile, Valdivia, Chile
| | - Carla Garrido
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile
| | - Mariana Serra
- Centro Nacional Patagónico, CCT CONICET-CENPAT, Puerto Madryn, Chubut, Argentina
| | - Mónica N Gil
- Centro para el Estudio de Sistemas Marinos (CESIMAR - CONICET), Puerto Madryn, Chubut, Argentina; Universidad Nacional de la Patagonia San Juan Bosco, Puerto Madryn, Chubut, Argentina
| | - Jorge M Navarro
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, Chile; Centro Fondap de Investigación Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Universidad Austral de Chile, Valdivia, Chile
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10
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Che Y, Ding L, Qiu J, Ji Y, Li A. Conversion and Stability of New Metabolites of Paralytic Shellfish Toxins under Different Temperature and pH Conditions. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:1427-1435. [PMID: 31913622 DOI: 10.1021/acs.jafc.9b07063] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A number of new C-11 hydroxyl metabolites (so-called M-toxins) of paralytic shellfish toxins (PSTs) have been discovered in contaminated shellfish, and trace amounts have also been detected in some strains of PST-producing microalgae. To investigate the chemical conversion and stability of M-toxins, mussel extracts were purified with solid-phase extraction cartridges (Oasis HLB) and Biogel P-2 resin columns and four partially purified M-toxin fractions were stored at different temperatures (-20, 4, and 20 °C) and pH values (3, 4, and 5). The concentrations and profiles of M-toxins in these fractions were analyzed using liquid chromatography coupled with tandem mass spectrometry for 27 weeks. Results further confirmed the chemical conversion pathway M1 → M3 → M5 and determined for the first time two new transformation pathways: M2 → M4 → M6 and neosaxitoxin (NEO) → M10. The half-lives of M1, M2, M4, and M10 were calculated using a first-order degradation kinetics model, which indicated that the degradation of all M-toxins was dependent upon the temperature and pH, increasing with rising temperature and pH. In comparison to M4 and M10, M1 was more sensitive to the temperature, followed by M2. Results suggest that M-toxins should be maintained at a low temperature (-20 °C) and low pH (3) for their prolonged storage. M-toxins were less stable than all of the common analogues of PSTs, which may be beneficial for shellfish to achieve rapid detoxification through transformation of PSTs to M-toxins. These new findings are of significance because they enable further understanding of the metabolism of PSTs and their detoxification mechanisms in contaminated shellfish.
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Affiliation(s)
- Yijia Che
- College of Environmental Science and Engineering , Ocean University of China , Qingdao , Shandong 266100 , People's Republic of China
| | - Ling Ding
- College of Environmental Science and Engineering , Ocean University of China , Qingdao , Shandong 266100 , People's Republic of China
| | - Jiangbing Qiu
- College of Environmental Science and Engineering , Ocean University of China , Qingdao , Shandong 266100 , People's Republic of China
| | - Ying Ji
- College of Environmental Science and Engineering , Ocean University of China , Qingdao , Shandong 266100 , People's Republic of China
| | - Aifeng Li
- College of Environmental Science and Engineering , Ocean University of China , Qingdao , Shandong 266100 , People's Republic of China
- Key Laboratory of Marine Environment and Ecology, Ministry of Education , Ocean University of China , Qingdao , Shandong 266100 , People's Republic of China
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Seasonal variability of Protoceratium reticulatum and yessotoxins in Japanese scallop Patinopecten yessoensis in northern Yellow Sea of China. Toxicon 2017; 139:31-40. [DOI: 10.1016/j.toxicon.2017.09.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 09/26/2017] [Accepted: 09/28/2017] [Indexed: 11/22/2022]
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12
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Changes on cylindrospermopsin concentration and characterization of decomposition products in fish muscle ( Oreochromis niloticus ) by boiling and steaming. Food Control 2017. [DOI: 10.1016/j.foodcont.2017.02.035] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Oyaneder Terrazas J, Contreras HR, García C. Prevalence, Variability and Bioconcentration of Saxitoxin-Group in Different Marine Species Present in the Food Chain. Toxins (Basel) 2017; 9:E190. [PMID: 28604648 PMCID: PMC5488040 DOI: 10.3390/toxins9060190] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 06/07/2017] [Accepted: 06/08/2017] [Indexed: 11/16/2022] Open
Abstract
The saxitoxin-group (STX-group) corresponds to toxic metabolites produced by cyanobacteria and dinoflagellates of the genera Alexandrium, Gymnodinium, and Pyrodinium. Over the last decade, it has been possible to extrapolate the areas contaminated with the STX-group worldwide, including Chile, a phenomenon that has affected ≈35% of the Southern Pacific coast territory, generating a high economic impact. The objective of this research was to study the toxicity of the STX-group in all aquatic organisms (bivalves, algae, echinoderms, crustaceans, tunicates, cephalopods, gastropods, and fish) present in areas with a variable presence of harmful algal blooms (HABs). Then, the toxic profiles of each species and dose of STX equivalents ingested by a 60 kg person from 400 g of shellfish were determined to establish the health risk assessment. The toxins with the highest prevalence detected were gonyautoxin-4/1 (GTX4/GTX1), gonyautoxin-3/2 (GTX3/GTX2), neosaxitoxin (neoSTX), decarbamoylsaxitoxin (dcSTX), and saxitoxin (STX), with average concentrations of 400, 2800, 280, 200, and 2000 µg kg-1 respectively, a species-specific variability, dependent on the evaluated tissue, which demonstrates the biotransformation of the analogues in the trophic transfer with a predominance of α-epimers in all toxic profiles. The identification in multiple vectors, as well as in unregulated species, suggests that a risk assessment and risk management update are required; also, chemical and specific analyses for the detection of all analogues associated with the STX-group need to be established.
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Affiliation(s)
- Javiera Oyaneder Terrazas
- Physiology and Biophysics Program, Faculty of Medicine, University of Chile, Santiago 8380000, Chile.
| | - Héctor R Contreras
- Department of Basic and Clinical Oncology, Faculty of Medicine, University of Chile, Santiago 8380000, Chile.
| | - Carlos García
- Department of Basic and Clinical Oncology, Faculty of Medicine, University of Chile, Santiago 8380000, Chile.
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Influence of Cooking (Microwaving and Broiling) on Cylindrospermopsin Concentration in Muscle of Nile Tilapia (Oreochromis niloticus) and Characterization of Decomposition Products. Toxins (Basel) 2017; 9:toxins9060177. [PMID: 28587145 PMCID: PMC5488027 DOI: 10.3390/toxins9060177] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 05/18/2017] [Accepted: 05/24/2017] [Indexed: 11/30/2022] Open
Abstract
Cylindrospermopsin (CYN) has become increasingly important as a freshwater algal toxin, showing cytotoxic effects. This toxin is able to bioaccumulate in freshwater food webs, representing a serious human health problem. Normally, fish is cooked before consumption, and CYN concentration can be altered. For the first time, the effects of microwaving and broiling for 1 and 2 min on CYN concentration and its decomposition products in fish muscle (Oreochromis niloticus) contaminated in the laboratory were investigated, using UPLC-MS/MS and Orbitrap. The results show that cooking the fish reduced unconjugated CYN levels by 11, 10 and 15% after microwaving for 1 and 2 min, and broiling for 2 min, respectively, compared to control fish. Different CYN decomposition products with m/z 416.1234 (7-epi-CYN) and m/z 336.16663 (diasteroisomers C-3A, C-3C, C-3D, C-3E, C-3F) are generated in fish samples submitted to cooking. Based on the relative abundance of the decomposition products, the possible degradation pathways taking place by microwaving may be through the formation of 7-epi-CYN and m/z 336.16663 compounds, whereas in the case of broiling the last route is the only one observed in this study. The influence of cooking and the toxicity characterization of the degradation products generated in CYN-contaminated fish are of importance for more realistic risk evaluation related to their consumption.
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Kaba N, Corapci B. Effects of Two Different Modified Atmosphere Compositions on Durability of Steam-Cooked Rainbow Trout ( O
ncorhynchus
M
ykiss
, Walbaum, 1792). J FOOD PROCESS PRES 2014. [DOI: 10.1111/jfpp.12195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Nilgun Kaba
- Department of Fish Processing Technology; Fisheries Faculty; Sinop University; Sinop 57000 Turkey
| | - Bengunur Corapci
- Department of Fish Processing Technology; Fisheries Faculty; Sinop University; Sinop 57000 Turkey
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Li A, Ma J, Cao J, Wang Q, Yu R, Thomas K, Quilliam M. Analysis of paralytic shellfish toxins and their metabolites in shellfish from the North Yellow Sea of China. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2012; 29:1455-64. [DOI: 10.1080/19440049.2012.699005] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Escobedo-Lozano AY, Estrada N, Ascencio F, Contreras G, Alonso-Rodriguez R. Accumulation, biotransformation, histopathology and paralysis in the Pacific calico scallop Argopecten ventricosus by the paralyzing toxins of the dinoflagellate Gymnodinium catenatum. Mar Drugs 2012; 10:1044-1065. [PMID: 22822356 PMCID: PMC3397451 DOI: 10.3390/md10051044] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 04/10/2012] [Accepted: 04/18/2012] [Indexed: 11/16/2022] Open
Abstract
The dinoflagellate Gymnodinium catenatum produces paralyzing shellfish poisons that are consumed and accumulated by bivalves. We performed short-term feeding experiments to examine ingestion, accumulation, biotransformation, histopathology, and paralysis in the juvenile Pacific calico scallop Argopecten ventricosus that consume this dinoflagellate. Depletion of algal cells was measured in closed systems. Histopathological preparations were microscopically analyzed. Paralysis was observed and the time of recovery recorded. Accumulation and possible biotransformation of toxins were measured by HPLC analysis. Feeding activity in treated scallops showed that scallops produced pseudofeces, ingestion rates decreased at 8 h; approximately 60% of the scallops were paralyzed and melanin production and hemocyte aggregation were observed in several tissues at 15 h. HPLC analysis showed that the only toxins present in the dinoflagellates and scallops were the N-sulfo-carbamoyl toxins (C1, C2); after hydrolysis, the carbamate toxins (epimers GTX2/3) were present. C1 and C2 toxins were most common in the mantle, followed by the digestive gland and stomach-complex, adductor muscle, kidney and rectum group, and finally, gills. Toxin profiles in scallop tissue were similar to the dinoflagellate; biotransformations were not present in the scallops in this short-term feeding experiment.
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Affiliation(s)
- Amada Y. Escobedo-Lozano
- Laboratorio de Biotoxinas Marinas, Instituto de Ciencias del Mary Limnologia, Universidad Nacional Autonoma de Mexico, Apdo. Postal 811, Mazatlan, Sinaloa 82040, Mexico;
- Departamento de Ingenieria Quimica-Bioquimica, Instituto Tecnologico de Mazatlan, Calle Corsario 1 No. 203, Col. Urias, Mazatlan, Sinaloa 82070, Mexico
| | - Norma Estrada
- Departamento de Fisiologia, Biofisica y Neurociencias, Centro de Investigacion y de Estudios Avanzados del IPN, Av. Instituto Politecnico Nacional 2508, Mexico City, D.F. 07300, Mexico; (N.E.); (G.C.)
- Departamento de Patologia Marina, Centro de Investigaciones Biologicas del Noroeste, Mar Bermejo 195, Col. Playa Palo de Santa Rita, La Paz, B.C.S. 23096, Mexico;
| | - Felipe Ascencio
- Departamento de Patologia Marina, Centro de Investigaciones Biologicas del Noroeste, Mar Bermejo 195, Col. Playa Palo de Santa Rita, La Paz, B.C.S. 23096, Mexico;
| | - Gerardo Contreras
- Departamento de Fisiologia, Biofisica y Neurociencias, Centro de Investigacion y de Estudios Avanzados del IPN, Av. Instituto Politecnico Nacional 2508, Mexico City, D.F. 07300, Mexico; (N.E.); (G.C.)
| | - Rosalba Alonso-Rodriguez
- Laboratorio de Biotoxinas Marinas, Instituto de Ciencias del Mary Limnologia, Universidad Nacional Autonoma de Mexico, Apdo. Postal 811, Mazatlan, Sinaloa 82040, Mexico;
- Author to whom correspondence should be addressed; ; Tel.: +52-669-985-2845; Fax: +52-669-982-6133
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