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Preece EP, Otten TG, Cooke J, Kudela RM. Microcystins in the benthic food-web of the Sacramento-San Joaquin Delta, California. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 946:174250. [PMID: 38936722 DOI: 10.1016/j.scitotenv.2024.174250] [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: 03/26/2024] [Revised: 06/21/2024] [Accepted: 06/22/2024] [Indexed: 06/29/2024]
Abstract
Harmful cyanobacteria blooms are a growing threat in estuarine waters as upstream blooms are exported into coastal environments. Cyanobacteria can produce potent toxins, one of which-hepatotoxic microcystins (MCs)-can persist and accumulate within the food web. Filter-feeding invertebrates may biomagnify toxins up to 100× ambient concentrations. As such, bivalves can be used as an environmentally relevant and highly sensitive sentinel for MC monitoring. To date there has been little research on cyanotoxin bioaccumulation in estuaries. The Sacramento-San Joaquin Delta (Delta) aquatic food web has undergone a profound change in response to widespread colonization of aquatic invasive species such as Asian clams (Corbicula fluminea) in the freshwater portion of the Delta. These clams are prolific-blanketing areas of the Delta at densities up to 1000 clams/m2 and are directly implicated in the pelagic organism decline of threatened and endangered fishes. We hypothesized that Asian clams accumulate MCs which may act as an additional stressor to the food web and MCs would seasonally be in exceedance of public health advisory levels. MCs accumulation in Delta Asian clams and signal crayfish (Pacifastacus leniusculus) were studied over a two-year period. ELISA and LC-MS analytical methods were used to measure free and protein-bound MCs in clam and crayfish tissues. We describe an improved MC extraction method for use when analyzing these taxa by LC-MS. MCs were found to accumulate in Asian clams across all months and at all study sites, with seasonal maxima occurring during the summer. Although MC concentrations rarely exceeded public health advisory levels, the persistence of MCs year-round still poses a chronic risk to consumers. Crayfish at times also accumulated high concentrations of MCs. Our results highlight the utility of shellfish as sentinel organisms for monitoring in estuarine areas.
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Affiliation(s)
- Ellen P Preece
- California Department of Water Resources, 3500 Industrial Blvd, West Sacramento, CA 95691, United States of America; Robertson-Bryan, Inc., 3100 Zinfandel Drive, St 300, Rancho Cordova, CA, United States of America.
| | - Timothy G Otten
- Bend Genetics, LLC, 107 Scripps Drive St 210, Sacramento, CA, United States of America
| | - Janis Cooke
- Central Valley Regional Water Quality Control Board, 11020, Sun Center Drive, St 200, Rancho Cordova, CA, United States of America
| | - Raphael M Kudela
- University of California Santa Cruz, Dept. of Ocean Sciences, 1156 High St, Santa Cruz, CA 95064, United States of America
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Campos TGV, Gama WA, Geraldes V, Yoon J, Crnkovic CM, Pinto E, Jacinavicius FR. New records on toxic cyanobacteria from Brazil: Exploring their occurrence and geography. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172689. [PMID: 38692315 DOI: 10.1016/j.scitotenv.2024.172689] [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: 09/06/2023] [Revised: 04/12/2024] [Accepted: 04/20/2024] [Indexed: 05/03/2024]
Abstract
Cyanobacterial Harmful Algal Blooms (CyanoHABs) pose a significant threat to communities globally, impacting ecosystems and public health. This study provides an in-depth review of the current state of cyanotoxins and the distribution of CyanoHABs species in Brazil, while also detailing the methods used for their detection. Four hundred and twenty-one incidents were analyzed from 1993 to 2021, compiling cyanotoxin records and toxic CyanoHABs occurrences. The investigation begins with the first detection of microcystins in 1994 and highlights pivotal moments, like the 1996 "Caruaru Syndrome" outbreak. This event encouraged research and updated cyanotoxin-monitoring guidelines. The Brazilian drought period of 2015-2016 exacerbated cyanobacterial growth and saxitoxin levels, coinciding with Zika-related microcephaly. This study delves into methods used for cyanotoxin analysis, including ELISA, bioassays, HPLC, and LC-MS. Additionally, we investigated the toxicity of 37 cyanobacterial strains isolated from various Brazilian environments. Extracts were tested against Artemia salina and analyzed by LC-MS. Results revealed toxicity in extracts from 49 % of cyanobacterial strains. LC-MS results were analyzed using GNPS MS/MS molecular networking for comparing experimental spectra with those of cyanotoxin standards against in-house databases and the existing literature. Our research underscores the variability in cyanotoxin production among species and over time, extending beyond microcystins. LC-MS results, interpreted through the GNPS platform, revealed six cyanotoxin groups in Brazilian strains. Yet, compounds present in 75 % of the toxic extracts remained unidentified. Further research is crucial for fully comprehending the impact of potentially harmful organisms on water quality and public health management strategies. The study highlights the urgent need for continuously monitoring cyanobacteria and the cyanotoxin inclusion of management in public health policies.
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Affiliation(s)
- Thaíssa Giovanna Valverde Campos
- University of São Paulo, School of Pharmaceutical Sciences, Avenida Prof. Lineu Prestes, 580, Butantã, CEP 05508-900 São Paulo, SP, Brazil
| | - Watson A Gama
- Federal Rural University of Pernambuco, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, CEP 52171-900, Recife, PE, Brazil
| | - Vanessa Geraldes
- University of São Paulo, School of Pharmaceutical Sciences, Avenida Prof. Lineu Prestes, 580, Butantã, CEP 05508-900 São Paulo, SP, Brazil; Centre for Nuclear Energy in Agriculture, University of São Paulo, CEP 13418-260, Piracicaba, SP, Brazil
| | - Jaewon Yoon
- University of São Paulo, School of Pharmaceutical Sciences, Avenida Prof. Lineu Prestes, 580, Butantã, CEP 05508-900 São Paulo, SP, Brazil
| | - Camila M Crnkovic
- University of São Paulo, School of Pharmaceutical Sciences, Avenida Prof. Lineu Prestes, 580, Butantã, CEP 05508-900 São Paulo, SP, Brazil
| | - Ernani Pinto
- University of São Paulo, School of Pharmaceutical Sciences, Avenida Prof. Lineu Prestes, 580, Butantã, CEP 05508-900 São Paulo, SP, Brazil; Centre for Nuclear Energy in Agriculture, University of São Paulo, CEP 13418-260, Piracicaba, SP, Brazil
| | - Fernanda Rios Jacinavicius
- University of São Paulo, School of Pharmaceutical Sciences, Avenida Prof. Lineu Prestes, 580, Butantã, CEP 05508-900 São Paulo, SP, Brazil; Centre for Nuclear Energy in Agriculture, University of São Paulo, CEP 13418-260, Piracicaba, SP, Brazil.
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Duarte Silva A, Rodrigues SM, Godinho L. Advances in the Early Warning of Shellfish Toxification by Dinophysis acuminata. Toxins (Basel) 2024; 16:204. [PMID: 38787056 PMCID: PMC11126001 DOI: 10.3390/toxins16050204] [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: 02/26/2024] [Revised: 04/09/2024] [Accepted: 04/17/2024] [Indexed: 05/25/2024] Open
Abstract
In Western Europe, the incidence of DST is likely the highest globally, posing a significant threat with prolonged bans on shellfish harvesting, mainly caused by species of the dinoflagellate genus Dinophysis. Using a time series from 2014 to 2020, our study aimed (i) to determine the concentration of D. acuminata in water at which shellfish toxin levels could surpass the regulatory limit (160 µg OA equiv kg-1) and (ii) to assess the predictability of toxic events for timely mitigation actions, especially concerning potential harvesting bans. The analysis considered factors such as (i) overdispersion in the data, (ii) distinct periods of presence and absence, (iii) the persistence of cells, and (iv) the temporal lag between cells in the water and toxins in shellfish. Four generalized additive models were tested, with the Tweedie (TW-GAM) model showing superior performance (>85%) and lower complexity. The results suggest existing thresholds currently employed (200 and 500 cells L-1) are well-suited for the Portuguese coast, supported by empirical evidence (54-79% accuracy). The developed algorithm allows for thresholds to be tailored on a case-by-case basis, offering flexibility for regional variations.
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Affiliation(s)
- Alexandra Duarte Silva
- IPMA—Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, 1495-165 Lisboa, Portugal;
| | - Susana Margarida Rodrigues
- IPMA—Instituto Português do Mar e da Atmosfera, Rua Alfredo Magalhães Ramalho, 6, 1495-165 Lisboa, Portugal;
| | - Lia Godinho
- ICNF—Instituto de Conservação da Natureza e Florestas, Av. da República, 16, 1050-191 Lisboa, Portugal;
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Li R, Gao L, Wu G, Dong J. Multiple marine algae identification based on three-dimensional fluorescence spectroscopy and multi-label convolutional neural network. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 311:123938. [PMID: 38330754 DOI: 10.1016/j.saa.2024.123938] [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: 10/16/2023] [Revised: 12/14/2023] [Accepted: 01/20/2024] [Indexed: 02/10/2024]
Abstract
Accurate identification of algal populations plays a pivotal role in monitoring seawater quality. Fluorescence-based techniques are effective tools for quickly identifying different algae. However, multiple coexisting algae and their similar photosynthetic pigments can constrain the efficacy of fluorescence methods. This study introduces a multi-label classification model that combines a specific Excitation-Emission matric convolutional neural network (EEM-CNN) with three-dimensional (3D) fluorescence spectroscopy to detect single and mixed algal samples. Spectral data can be input directly into the model without transforming into images. Rectangular convolutional kernels and double convolutional layers are applied to enhance the extraction of balanced and comprehensive spectral features for accurate classification. A dataset comprising 3D fluorescence spectra from eight distinct algae species representing six different algal classes was obtained, preprocessed, and augmented to create input data for the classification model. The classification model was trained and validated using 4448 sets of test samples and 60 sets of test samples, resulting in an accuracy of 0.883 and an F1 score of 0.925. This model exhibited the highest recognition accuracy in both single and mixed algae samples, outperforming comparative methods such as ML-kNN and N-PLS-DA. Furthermore, the classification results were extended to three different algae species and mixed samples of skeletonema costatum to assess the impact of spectral similarity on multi-label classification performance. The developed classification models demonstrated robust performance across samples with varying concentrations and growth stages, highlighting CNN's potential as a promising tool for the precise identification of marine algae.
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Affiliation(s)
- Ruizhuo Li
- Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; College of Photoelectricity, University of Chinese Academy of Science, Beijing 100049, China
| | - Limin Gao
- Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China
| | - Guojun Wu
- Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; Laoshan Laboratory, Qingdao 266237, Shandong, China.
| | - Jing Dong
- Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; College of Photoelectricity, University of Chinese Academy of Science, Beijing 100049, China
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Li SC, Gu LH, Wang YF, Wang LM, Chen L, Giesy JP, Tuo X, Xu WL, Wu QH, Liu YQ, Wu MH, Diao YY, Zeng HH, Zhang QB. A proteomic study on gastric impairment in rats caused by microcystin-LR. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 917:169306. [PMID: 38103614 DOI: 10.1016/j.scitotenv.2023.169306] [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: 02/07/2023] [Revised: 11/28/2023] [Accepted: 12/10/2023] [Indexed: 12/19/2023]
Abstract
Microcystins (MCs) are the most common cyanobacterial toxins. Epidemiological investigation showed that exposure to MCs can cause gastro-intestinal symptoms, gastroenteritis and gastric cancer. MCs can also accumulate in and cause histopathological damage to stomach. However, the exact mechanisms by which MCs cause gastric injury were unclear. In this study, Wistar rats were administrated 50, 75 or 100 μg microcystin-LR (MC-LR)/kg, body mass (bm) via tail vein, and histopathology, response of anti-oxidant system and the proteome of gastric tissues at 24 h after exposure were studied. Bleeding of fore-stomach and gastric corpus, inflammation and necrosis in gastric corpus and exfoliation of mucosal epithelial cells in gastric antrum were observed following acute MC-LR exposure. Compared with controls, activities of superoxide dismutase (SOD) were significantly greater in gastric tissues of exposed rats, while activities of catalase (CAT) were less in rats administrated 50 μg MC-LR/kg, bm, and concentrations of glutathione (GSH) and malondialdehyde (MDA) were greater in rats administrated 75 or 100 μg MC-LR/kg, bm. These results indicated that MC-LR could disrupt the anti-oxidant system and cause oxidative stress. The proteomic results revealed that MC-LR could affect expressions of proteins related to cytoskeleton, immune system, gastric functions, and some signaling pathways, including platelet activation, complement and coagulation cascades, and ferroptosis. Quantitative real-time PCR (qRT-PCR) analysis showed that transcriptions of genes for ferroptosis and gastric function were altered, which confirmed results of proteomics. Overall, this study illustrated that MC-LR could induce gastric dysfunction, and ferroptosis might be involved in MC-LR-induced gastric injury. This study provided novel insights into mechanisms of digestive diseases induced by MCs.
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Affiliation(s)
- Shang-Chun Li
- Environmental Health Effects and Risk Assessment Key Laboratory of Luzhou, School of Public Health, Southwest Medical University, Luzhou 646000, China
| | - Li-Hong Gu
- Environmental Health Effects and Risk Assessment Key Laboratory of Luzhou, School of Public Health, Southwest Medical University, Luzhou 646000, China
| | - Yan-Fang Wang
- Environmental Health Effects and Risk Assessment Key Laboratory of Luzhou, School of Public Health, Southwest Medical University, Luzhou 646000, China
| | - Li-Mei Wang
- Environmental Health Effects and Risk Assessment Key Laboratory of Luzhou, School of Public Health, Southwest Medical University, Luzhou 646000, China
| | - Liang Chen
- Qilu Lake Field Scientific Observation and Research Station for Plateau Shallow Lake in Yunnan Province, Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, China; Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Faculty of Water Resources and Hydroelectric Engineering, Xi'an University of Technology, Xi'an 710048, China.
| | - John P Giesy
- Department of Veterinary Biomedical Sciences, Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B3, Canada
| | - Xun Tuo
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Wen-Li Xu
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qian-Hui Wu
- School of Ecology and Environment, Anhui Normal University, Wuhu 241002, China
| | - Yi-Qing Liu
- Qilu Lake Field Scientific Observation and Research Station for Plateau Shallow Lake in Yunnan Province, Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, China
| | - Ming-Huo Wu
- Environmental Health Effects and Risk Assessment Key Laboratory of Luzhou, School of Public Health, Southwest Medical University, Luzhou 646000, China
| | - Yang-Yang Diao
- Department of Pediatrics, Southwest Medical University, Luzhou 646000, China
| | - Hao-Hang Zeng
- Environmental Health Effects and Risk Assessment Key Laboratory of Luzhou, School of Public Health, Southwest Medical University, Luzhou 646000, China
| | - Qing-Bi Zhang
- Environmental Health Effects and Risk Assessment Key Laboratory of Luzhou, School of Public Health, Southwest Medical University, Luzhou 646000, China.
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Santos-Silva RDD, Severiano JDS, Chia MA, Queiroz TM, Cordeiro-Araújo MK, Barbosa JEDL. Unveiling the link between Raphidiopsis raciborskii blooms and saxitoxin levels: Evaluating water quality in tropical reservoirs, Brazil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 344:123401. [PMID: 38244903 DOI: 10.1016/j.envpol.2024.123401] [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: 09/07/2023] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 01/22/2024]
Abstract
The proliferation of Raphidiopsis raciborskii blooms has sparked concerns regarding potential human exposure to heightened saxitoxins (STXs) levels. Thus, comprehending how environmental elements drive the proliferation of this STXs-producing species can aid in predicting human exposure risks. This study aimed to explore the link between cyanobacteria R. raciborskii, STXs cyanotoxins, and environmental factors in 37 public supply reservoirs in the tropical region and assess potential health hazards these toxins pose in the reservoir waters. A Structural Equation Model was used to assess the impact of environmental factors (water volume and physical and chemical variables) on R. raciborskii biomass and STXs levels. Furthermore, the potential risk of STXs exposure from consuming untreated reservoir water was evaluated. Lastly, the cumulative distribution function (CDF) of STXs across the reservoirs was computed. Our findings revealed a correlation between R. raciborskii biomass and STXs concentrations. Total phosphorus emerged as a critical environmental factor positively influencing species biomass and indirectly affecting STXs levels. pH significantly influenced STXs concentrations, indicating different factors influencing R. raciborskii biomass and STXs. Significantly, for the first time, the risk of STXs exposure was gauged using the risk quotient (HQ) for untreated water consumption from public supply reservoirs in Brazil's semi-arid region. Although the exposure risks were generally low to moderate, the CDF underscored the risk of chronic exposure due to low toxin concentrations in over 90% of samples. These outcomes emphasize the potential expansion of R. raciborskii in tropical settings due to increased phosphorus, amplifying waterborne STXs levels and associated intoxication risks. Thus, this study reinforces the importance of nutrient control, particularly phosphorus regulation, as a mitigation strategy against R. raciborskii blooms and reducing STXs intoxication hazards.
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Affiliation(s)
- Ranielle Daiana Dos Santos-Silva
- Ecology Program, Department of Biology, State University of Paraíba - UEPB, Rua Baraúnas, nº. 351, Universitario, 58.429-500, Campina Grande, PB, Brazil
| | - Juliana Dos Santos Severiano
- Ecology Program, Department of Biology, State University of Paraíba - UEPB, Rua Baraúnas, nº. 351, Universitario, 58.429-500, Campina Grande, PB, Brazil.
| | - Mathias Ahii Chia
- Department of Botany, Ahmadu University Bello, 81 0001, Zaria, Nigeria; Department of Ecology, University of Brasília - UnB, Graduate Program in Ecology. Institute of Biological Sciences - IB, Asa Norte, DF, 70910-900, Brasilia, Brazil
| | - Tatiane Medeiros Queiroz
- Ecology Program, Department of Biology, State University of Paraíba - UEPB, Rua Baraúnas, nº. 351, Universitario, 58.429-500, Campina Grande, PB, Brazil
| | - Micheline Kézia Cordeiro-Araújo
- Department of Cellular Biology, University of Brasília - UnB, Graduate Program in Microbial Biology. Institute of Biological Sciences - IB, Bloco E, s/n, Asa Norte, DF, 70910-900, Brasilia, Brazil
| | - José Etham de Lucena Barbosa
- Ecology Program, Department of Biology, State University of Paraíba - UEPB, Rua Baraúnas, nº. 351, Universitario, 58.429-500, Campina Grande, PB, Brazil
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Pierce EF, Schnetzer A. Microcystin Concentrations, Partitioning, and Structural Composition during Active Growth and Decline: A Laboratory Study. Toxins (Basel) 2023; 15:684. [PMID: 38133188 PMCID: PMC10746996 DOI: 10.3390/toxins15120684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/30/2023] [Accepted: 12/02/2023] [Indexed: 12/23/2023] Open
Abstract
Microcystin can be present in variable concentrations, phases (dissolved and particulate), and structural forms (congeners), all which impact the toxicity and persistence of the algal metabolite. Conducting incubation experiments with six bloom assemblages collected from the Chowan River, North Carolina, we assessed microcystin dynamics during active growth and biomass degradation. Upon collection, average particulate and dissolved microcystin ranged between 0.2 and 993 µg L-1 and 0.5 and 3.6 µg L-1, respectively. The presence of congeners MC-LA, -LR, -RR, and -YR was confirmed with MC-RR and MC-LR being the most prevalent. Congener composition shifted over time and varied between dissolved and particulate phases. Particulate microcystin exponentially declined in five of six incubations with an average half-life of 10.2 ± 3.7 days, while dissolved microcystin remained detectable until the end of the incubation trials (up to 100 days). Our findings suggest that concerns about food-web transfer via intracellular toxins seem most warranted within the first few weeks of the bloom peak, while dissolved toxins linger for several months in the aftermath of the event. Also, it was indicated there were differences in congener profiles linked to the sampling method. We believe this study can inform monitoring strategies and aid microcystin-exposure risk assessments for cyanobacterial blooms.
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Affiliation(s)
- Emily F Pierce
- Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Astrid Schnetzer
- Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA
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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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Perry RI, Nemcek N, Hennekes M, Sastri A, Ross ARS, Shannon H, Shartau RB. Domoic acid in Canadian Pacific waters, from 2016 to 2021, and relationships with physical and chemical conditions. HARMFUL ALGAE 2023; 129:102530. [PMID: 37951625 DOI: 10.1016/j.hal.2023.102530] [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: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 11/14/2023]
Abstract
Domoic acid, a phycotoxin produced by species of the marine diatom Pseudo-nitzschia, can cause deleterious impacts to marine food webs and human health. Domoic acid and Pseudo-nitzschia spp. were surveyed from 2016 to 2021 in the Pacific waters of Canada to assess their occurrences, concentrations, and relationships with physical and chemical conditions. Domoic acid was common, occurring in measurable concentrations in 73 % of the 454 samples. It occurred in all regions (west coast of Vancouver Island, Salish Sea, Queen Charlotte Sound / Hecate Strait, deep oceanic NE Pacific), in all years and all seasons. Median concentrations were highest along the west coast of Vancouver Island, and lowest in the oceanic waters of the NE Pacific. Winter had the lowest concentrations; no significant differences occurred between spring, summer, and autumn. High domoic acid concentrations equal to or above 100 ng/L were not common, occurring in about 5 % of samples, but in all seasons and all years except 2019. All six Pseudo-nitzschia taxa identified had similar median concentrations, but different frequencies of occurrence. P. cf. australis appeared to be the major contributor to high concentrations of domoic acid. Physico-chemical conditions were described by ten variables: temperature, salinity, density difference between 30 m and the surface (a proxy for vertical stability), chlorophyll a, nitrate, phosphate, silicate, and the ratios nitrate:phosphate, nitrate:silicate, and silicate:phosphate. Statistical analyses, using general linear models, of their relationships with the absence/presence of Pseudo-nitzschia spp. found silicate (negative) to be the most influential variable common in both the west coast of Vancouver Island and Salish Sea regions. Temperature and chlorophyll a were the most influential variables which determined the log10 abundance of Pseudo-nitzschia spp. in both regions. Analyses of the absence/presence of particulate domoic acid per Pseudo-nitzschia cell (excluding P. americana) found chlorophyll a to be the most influential variable common in both regions, whereas no common influential variable determined the log10 concentration of particulate domoic acid per Pseudo-nitzschia cell (excluding P. americana). These results were generally similar to those of other studies from this area, although this study extends these findings to all seasons and all regions of Canada's Pacific waters. The results provide important background information against which major outbreaks and unusual events can be compared. A domoic acid surveillance program during synoptic oceanographic surveys can help to understand where and when it reaches high concentrations at sea and the potential impacts to the marine ecosystem.
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Affiliation(s)
- R Ian Perry
- Fisheries and Oceans Canada, Pacific Biological Station, Nanaimo, B.C., V9T 6N7, Canada; Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, B.C., V8L 4B2, Canada.
| | - Nina Nemcek
- Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, B.C., V8L 4B2, Canada
| | - Melissa Hennekes
- Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, B.C., V8L 4B2, Canada
| | - Akash Sastri
- Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, B.C., V8L 4B2, Canada
| | - Andrew R S Ross
- Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, B.C., V8L 4B2, Canada
| | - Hayleigh Shannon
- Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, B.C., V8L 4B2, Canada
| | - Ryan B Shartau
- The University of Texas at Tyler, Department of Biology, Tyler, TX, 75799, USA
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10
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Dong H, Aziz MT, Richardson SD. Transformation of Algal Toxins during the Oxidation/Disinfection Processes of Drinking Water: From Structure to Toxicity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:12944-12957. [PMID: 37603687 DOI: 10.1021/acs.est.3c01912] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
With the increase of algal blooms worldwide, drinking water resources are threatened by the release of various algal toxins, which can be hepatotoxic, cytotoxic, or neurotoxic. Because of their ubiquitous occurrence in global waters and incomplete removal in conventional drinking water treatment, oxidation/disinfection processes have become promising alternative treatment options to destroy both the structures and toxicity of algal toxins. This Review first summarizes the occurrence and regulation of algal toxins in source water and drinking water. Then, the transformation kinetics, disinfection byproducts (DBPs)/transformation products (TPs), pathways, and toxicity of algal toxins in water oxidation/disinfection processes, including treatment by ozonation, chlorination, chloramination, ultraviolet-based advanced oxidation process, and permanganate, are reviewed. For most algal toxins, hydroxyl radicals (HO•) exhibit the highest oxidation rate, followed by ozone and free chlorine. Under practical applications, ozone and chlorine can degrade most algal toxins to meet water quality standards. However, the transformation of the parent structures of algal toxins by oxidation/disinfection processes does not guarantee a reduction in toxicity, and the formation of toxic TPs should also be considered, especially during chlorination. Notably, the toxicity variation of algal toxins is associated with the chemical moiety responsible for toxicity (e.g., Adda moiety in microcystin-LR and uracil moiety in cylindrospermopsin). Moreover, the formation of known halogenated DBPs after chlorination indicates that toxicity in drinking water may shift from toxicity contributed by algal toxins to toxicity contributed by DBPs. To achieve the simultaneous toxicity reduction of algal toxins and their TPs, optimized oxidation/disinfection processes are warranted in future research, not only for meeting water quality standards but also for effective reduction of toxicity of algal toxins.
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Affiliation(s)
- Huiyu Dong
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Md Tareq Aziz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Susan D Richardson
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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11
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Trainer VL, King TL. SoundToxins: A Research and Monitoring Partnership for Harmful Phytoplankton in Washington State. Toxins (Basel) 2023; 15:toxins15030189. [PMID: 36977080 PMCID: PMC10056251 DOI: 10.3390/toxins15030189] [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: 01/04/2023] [Revised: 02/01/2023] [Accepted: 02/24/2023] [Indexed: 03/06/2023] Open
Abstract
The more frequent occurrence of marine harmful algal blooms (HABs) and recent problems with newly-described toxins in Puget Sound have increased the risk for illness and have negatively impacted sustainable access to shellfish in Washington State. Marine toxins that affect safe shellfish harvest because of their impact on human health are the saxitoxins that cause paralytic shellfish poisoning (PSP), domoic acid that causes amnesic shellfish poisoning (ASP), diarrhetic shellfish toxins that cause diarrhetic shellfish poisoning (DSP) and the recent measurement of azaspiracids, known to cause azaspiracid poisoning (AZP), at low concentrations in Puget Sound shellfish. The flagellate, Heterosigma akashiwo, impacts the health and harvestability of aquacultured and wild salmon in Puget Sound. The more recently described flagellates that cause the illness or death of cultivated and wild shellfish, include Protoceratium reticulatum, known to produce yessotoxins, Akashiwo sanguinea and Phaeocystis globosa. This increased incidence of HABs, especially dinoflagellate HABs that are expected in increase with enhanced stratification linked to climate change, has necessitated the partnership of state regulatory programs with SoundToxins, the research, monitoring and early warning program for HABs in Puget Sound, that allows shellfish growers, Native tribes, environmental learning centers and citizens, to be the “eyes on the coast”. This partnership enables safe harvest of wholesome seafood for consumption in the region and helps to describe unusual events that impact the health of oceans, wildlife and humans.
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Affiliation(s)
- Vera L. Trainer
- Olympic Natural Resources Center, University of Washington, Forks, WA 98331, USA
| | - Teri L. King
- Washington Sea Grant, University of Washington, Shelton, WA 98584, USA
- Correspondence:
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12
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Mohamed ZA, Mostafa Y, Alamri S, Hashem M, Alrumman S. Biotransformation and detoxification of saxitoxin by Bacillus flexus in batch experiments. Arch Microbiol 2023; 205:63. [PMID: 36629970 DOI: 10.1007/s00203-022-03397-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 12/17/2022] [Accepted: 12/30/2022] [Indexed: 01/12/2023]
Abstract
Saxitoxins (STXs) are carbamate alkaloid neurotoxins produced by some species of cyanobacteria. They are water soluble and relatively stable in the natural environment, and thereby represent a risk to animal and human health through a long-time exposure. STXs cannot be sufficiently removed by conventional water treatment methods. Therefore, this study investigates the potential STX biodegradation and detoxification by bacteria as a promising method for toxin removal. STX biodegradation experiments were conducted using Bacillus flexus SSZ01 strain in batch cultures. The results revealed that SSZ01 strain grew well and rapidly detoxified STX, with no lag phase observed. STX detoxification by SSZ01 strain was initial-toxin-concentration-dependent. The highest biotransformation rate (10 µg STX L-1 day-1) the pseudo-first-order kinetic constant (0.58 d-1) were obtained at the highest initial toxin concentration (50 µg L-1) and the lowest ones (0.06 µg STX L-1 day-1 and 0.14 d-1, respectively) were recorded at the lowest initial concentration (0.5 µg L-1). STX biotransformation rate increased with temperature, with highest occurred at 30 ºC. This rate was also influenced by pH, with highest obtained at pH8 and lowest at higher and lower pH values. HPLC chromatograms showed that STX biotransformation peak is corresponding to the least toxic STX analog (disulfated sulfocarbamoyl-C1 variant). The Artemia-based toxicity assay revealed that this biotransformation byproduct was nontoxic. This suggests the potential application of this bacterial strain in slow sand filters for cyanotoxin removal in water treatment plants. Being nontoxic, this byproduct needs to be assayed for its therapeutic effects toward neurodegenerative diseases.
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Affiliation(s)
- Zakaria A Mohamed
- Department of Botany and Microbiology, Faculty of Science, Sohag University, Sohag, 82524, Egypt.
| | - Yasser Mostafa
- College of Science, Department of Biology, King Khalid University, Abha, 61413, Saudi Arabia
| | - Saad Alamri
- College of Science, Department of Biology, King Khalid University, Abha, 61413, Saudi Arabia
| | - Mohamed Hashem
- College of Science, Department of Biology, King Khalid University, Abha, 61413, Saudi Arabia.,Faculty of Science, Botany and Microbiology Department, Assiut University, Assiut, 71516, Egypt
| | - Sulaiman Alrumman
- College of Science, Department of Biology, King Khalid University, Abha, 61413, Saudi Arabia
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13
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Pan L, Huang JJ, Chen J, He X, Wang Y, Wang J, Wang B. Trace determination of multiple hydrophilic cyanotoxins in freshwater by off- and on-line solid phase extraction coupled to liquid chromatography-tandem mass spectrometry. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 853:158545. [PMID: 36075415 DOI: 10.1016/j.scitotenv.2022.158545] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/06/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
Hydrophilic cyanotoxins (HCTs), such as paralytic shellfish toxins (PSTs), anatoxin-a (ATX-a), and cylindrospermopsin (CYN) are highly toxic and toxin-producing algae are widely distributed worldwide. However, HCTs, especially PSTs, are rarely reported in freshwater due to analytical limitations. This may result in an underestimation of the ecological risks and health risks. This study developed a new method to detect ATX-a, CYN, and thirteen common PSTs in freshwater simultaneously by using off-line solid phase extraction (SPE) and liquid chromatography-tandem mass spectrometry (LC-MS/MS). The limits of detection (LODs) of all targets were lower than 0.05 μg/L, which could meet the regulatory requirements for monitoring of HCTs in drinking water in different countries and regions. To improve the detection sensitivities for trace PSTs, a method based on off-line SPE and on-line SPE-LC-MS/MS was established with LOD around 0.001 μg/L. GTX1&4, GTX2&3, and GTX5 were detected in freshwater in China for the first time, highlighting that overall communities are facing potential risks of exposure to various PSTs in China. High concentrations of ATX-a and CYN were also detected in freshwater from Northern China. The proposed method helps to understand the pollution status of HCT in water bodies, especially during the non-algal bloom period.
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Affiliation(s)
- Lei Pan
- College of Environmental Science and Engineering, Sino-Canada Joint R&D Centre for Water and Environmental Safety, Nankai University, Tianjin 300071, China; Marine Bioresource and Environment Research Center, Key Laboratory of Marine Eco-Environmental Science and Technology, The First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Jinhui Jeanne Huang
- College of Environmental Science and Engineering, Sino-Canada Joint R&D Centre for Water and Environmental Safety, Nankai University, Tianjin 300071, China.
| | - Junhui Chen
- Marine Bioresource and Environment Research Center, Key Laboratory of Marine Eco-Environmental Science and Technology, The First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266071, China.
| | - Xiuping He
- Marine Bioresource and Environment Research Center, Key Laboratory of Marine Eco-Environmental Science and Technology, The First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Yuning Wang
- Marine Bioresource and Environment Research Center, Key Laboratory of Marine Eco-Environmental Science and Technology, The First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Jiuming Wang
- Marine Bioresource and Environment Research Center, Key Laboratory of Marine Eco-Environmental Science and Technology, The First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Baodong Wang
- Marine Bioresource and Environment Research Center, Key Laboratory of Marine Eco-Environmental Science and Technology, The First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266071, China
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14
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Stoyneva-Gärtner M, Stefanova K, Uzunov B, Radkova M, Gärtner G. Cuspidothrix Is the First Genetically Proved Anatoxin A Producer in Bulgarian Lakes and Reservoirs. Toxins (Basel) 2022; 14:toxins14110778. [PMID: 36356028 PMCID: PMC9696308 DOI: 10.3390/toxins14110778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/01/2022] [Accepted: 11/08/2022] [Indexed: 11/12/2022] Open
Abstract
The paper presents the first proof of planktonic cyanoprokaryote genus Cuspidothrix as an anatoxin A (ATX) producer in Bulgarian wetlands. The results from polymerase chain reaction (PCR) obtained from two summer sampling campaigns in 26 selected lakes and reservoirs demonstrated presence of the anaC gene, responsible for ATX production in 21 strains of the genus. They were found in three waterbodies sampled in 2018 (coastal lake Vaya, coastal reservoir Poroy, inland reservoir Sinyata Reka) and in four waterbodies sampled in 2019 (inland reservoirs Duvanli, Koprinka, Plachidol 2, Sinyata Reka). The detected genetic diversity generally corresponds to the observations conducted by conventional light microscopy, by which we distinguished three species of Cuspidothrix (Cuspidothrix issatschenkoi, Cuspidothrix elenkinii and Cuspidothrix tropicalis, the latter considered alien in the country). Eleven strains showed high similarity to two sequences of C. issatschenkoi available from the National Centre for Biotechnology Information (NCBI). Ten other strains assembled in a group, which-in lack of available from NCBI genetic sequences-were presumed related to C. tropicalis and C. elenkinii after comparison with the results from light microscopy. Cuspidothrix strains found in Bulgarian waterbodies showed high genetic similarity to those isolated and sequenced from Asia (Japan, China) and Northern Europe (Norway, Finland).
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Affiliation(s)
| | - Katerina Stefanova
- AgroBio Institute, Bulgarian Agricultural Academy, BG-1164 Sofia, Bulgaria
| | - Blagoy Uzunov
- Faculty of Biology, Department of Botany, Sofia University, BG-1164 Sofia, Bulgaria
- Correspondence:
| | - Mariana Radkova
- AgroBio Institute, Bulgarian Agricultural Academy, BG-1164 Sofia, Bulgaria
| | - Georg Gärtner
- Institute of Botany, Innsbruck University, A-6020 Innsbruck, Austria
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15
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Cevallos-Cedeño RE, Quiñones-Reyes G, Agulló C, Abad-Somovilla A, Abad-Fuentes A, Mercader JV. Rapid Immunochemical Methods for Anatoxin-a Monitoring in Environmental Water Samples. Anal Chem 2022; 94:10857-10864. [PMID: 35853613 PMCID: PMC9352146 DOI: 10.1021/acs.analchem.2c01939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Algal blooms that contaminate freshwater resources with
cyanotoxins
constitute, nowadays, a global concern. To deal with this problem,
a variety of analytical methods, including immunochemical assays,
are available for the main algal toxins, for example, microcystins,
nodularins, and saxitoxins, with the remarkable exception of anatoxin-a.
Now, for the first time, highly sensitive, enantioselective immunoassays
for anatoxin-a have been validated using homemade monoclonal antibodies.
Two competitive enzyme-linked immunosorbent assays were developed
in different formats, with detection limits for (+)-anatoxin-a of
0.1 ng/mL. Excellent recovery values between 82 and 117%, and coefficients
of variation below 20%, were observed using environmental water samples
fortified between 0.5 and 500 ng/mL. In addition, a lateral-flow immunochromatographic
assay was optimized for visual and instrumental reading of results.
This test showed a visual detection limit for (+)-anatoxin-a of 4
ng/mL. Performance with a reader was validated in accordance with
the European guidelines for semiquantitative rapid methods for small
chemical contaminants. Thus, at a screening target concentration of
2 ng/mL, the probability of a blank sample to be classified as “suspect”
was as low as 0.2%. Finally, the optimized direct enzyme immunoassay
was validated by comparison with high-performance liquid chromatography-tandem
mass spectroscopy data and showed a good correlation (r = 0.995) with a slope of 0.94. Moreover, environmental water samples
containing more than 2 ng/mL of anatoxin-a were detected by the developed
dipstick assay. These results provide supplementary and complementary
strategies for monitoring the presence of anatoxin-a in water.
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Affiliation(s)
- Ramón E Cevallos-Cedeño
- Institute of Agricultural Chemistry and Food Technology (IATA), Spanish Scientific Research Council (CSIC), Av. Agustí Escardino 7, Paterna 46980, Valencia, Spain
| | - Guillermo Quiñones-Reyes
- Department of Organic Chemistry, University of Valencia, Doctor Moliner 50, Burjassot 46100, Valencia, Spain
| | - Consuelo Agulló
- Department of Organic Chemistry, University of Valencia, Doctor Moliner 50, Burjassot 46100, Valencia, Spain
| | - Antonio Abad-Somovilla
- Department of Organic Chemistry, University of Valencia, Doctor Moliner 50, Burjassot 46100, Valencia, Spain
| | - Antonio Abad-Fuentes
- Institute of Agricultural Chemistry and Food Technology (IATA), Spanish Scientific Research Council (CSIC), Av. Agustí Escardino 7, Paterna 46980, Valencia, Spain
| | - Josep V Mercader
- Institute of Agricultural Chemistry and Food Technology (IATA), Spanish Scientific Research Council (CSIC), Av. Agustí Escardino 7, Paterna 46980, Valencia, Spain
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16
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Alexander P, Evgeniy G, Sergey V, Zhanna M, Tatiana O. The study of fluorescence features of microalgae from the genus Pseudo-nitzschia and the possibility of their detection in water. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Leal JF, Cristiano MLS. Revisiting the HPLC-FLD Method to Quantify Paralytic Shellfish Toxins: C3,4 Quantification and the First Steps towards Validation. Toxins (Basel) 2022; 14:toxins14030179. [PMID: 35324676 PMCID: PMC8949501 DOI: 10.3390/toxins14030179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/23/2022] [Accepted: 02/25/2022] [Indexed: 11/16/2022] Open
Abstract
Paralytic shellfish toxins (PSTs) are a large group of biotoxins that cause paralytic shellfish poisoning. Their appearance in natural waters and their ingestion by aquatic species have a huge socio-economic impact, whereby their monitoring is of the upmost relevance to minimize the consequences. For earlier detection and faster response/action by stakeholders, validation of adjusted analytical methods, particularly for lower concentration levels, is important. This work proposes a derived High-Performance Liquid Chromatography method, with fluorescence detection (HPLC-FLD). The main differences from the official method are the size of the HPLC column and the gradient elution conditions. It covers the current eleven certified reference materials (CRM) available on the market, including the most recent—C3,4. This first calibration report for C3,4 suggests limits of detection (LOD) and limits of quantification (LOQ) of 6 nM and 19 nM (~5 µg STX.2HCl eqv./kg and 17 µg STX.2HCl eqv./kg), respectively. For the remaining CRM, LODs ranged between 3 and 28 nM (~0.9 and 127 µg STX.2HCl eqv./kg), while LOQs varied between 11 and 94 nM (~3 and 409 µg STX.2HCl eqv./kg, considering toxicity equivalency factors (TEFs) reported by EFSA).
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Affiliation(s)
- Joana F. Leal
- Centre of Marine Sciences (CCMAR), University of Algarve (UAlg), Campus de Gambelas, 8005-139 Faro, Portugal;
- Department of Chemistry and Pharmacy, Faculty of Science and Technology (FCT), University of Algarve (UAlg), Campus de Gambelas, 8005-139 Faro, Portugal
| | - Maria L. S. Cristiano
- Centre of Marine Sciences (CCMAR), University of Algarve (UAlg), Campus de Gambelas, 8005-139 Faro, Portugal;
- Department of Chemistry and Pharmacy, Faculty of Science and Technology (FCT), University of Algarve (UAlg), Campus de Gambelas, 8005-139 Faro, Portugal
- Correspondence:
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18
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Magalhães-Ghiotto GAV, Natal JPS, Nishi L, Barbosa de Andrade M, Gomes RG, Bergamasco R. Okara and okara modified and functionalized with iron oxide nanoparticles for the removal of Microcystis aeruginosa and cyanotoxin. ENVIRONMENTAL TECHNOLOGY 2022:1-16. [PMID: 35138230 DOI: 10.1080/09593330.2022.2041105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Eutrophicating compounds promote the growth of cyanobacteria, which has the potential of releasing toxic compounds. Alternative raw materials, such as residues, have been used in efficient adsorption systems in water treatment. The aim of the present study was to apply the residue Okara in its original form and modified by hydrolysis with immobilization of magnetic nanoparticles as an adsorbent. For the removal, the cyanobacteria Microcystis aeruginosa was chosen, as well as its secondary metabolites, L-amino acids leucine and arginine (MC-LR microcystin), from aqueous solutions. The adsorbents presented a negative surface charge, and the x-ray diffraction (DRX) outcomes successfully demonstrated the immobilization of iron oxide nanoparticles on the adsorbents. The adsorbent with the best result was the Okara hydrolyzed and functionalized with iron oxide, which showed a 47% (qe = 804.166 cel/g) and 85% (qe = 116.94 µg/L) removal for the cyanobacteria cells and chlorophyll-a, respectively. The kinetics study demonstrated a pseudo-first-order adsorption with maximal adsorption in 480 minutes, removing 761 µg/L of chlorophyll-a. In this trial, a low organic material removal has occurred, with a removal rate of 5% (qe = 0.024 mg/g) in the analysis of compounds in absorbance by ultraviolet light (UV) monitored by optical density determination in 254 nm (OD254). Nevertheless, the reaction system with the presence of organic material removed 53,28% of the MC-LR toxin, with adsorption capacities of 2.84 µg/L in a preliminary trial conducted for two hours, arising as a potential and alternative adsorbent with a capacity of removing cyanobacteria and cyanotoxin cells simultaneously.
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Affiliation(s)
- Grace A V Magalhães-Ghiotto
- Department of Biotechnology, Genetics and Cell Biology, Biological Sciences Center, State University of Maringa, Maringa, Brazil
| | - Jean P S Natal
- Department of Biotechnology, Genetics and Cell Biology, Biological Sciences Center, State University of Maringa, Maringa, Brazil
| | - Letícia Nishi
- Department of Health Science, Technology Center, State University of Maringa, Maringa, Brazil
| | | | - Raquel G Gomes
- Department of Food Engineering, Technology Center, State University of Maringa, Maringa, Brazil
| | - Rosângela Bergamasco
- Department of Chemical Engineering, Technology Center, State University of Maringa, Maringa, Brazil
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Fast screening of saxitoxin, neosaxitoxin, and decarbamoyl analogues in fresh and brackish surface waters by on-line enrichment coupled to HILIC-HRMS. Talanta 2022; 241:123267. [DOI: 10.1016/j.talanta.2022.123267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 01/21/2022] [Accepted: 01/26/2022] [Indexed: 01/31/2023]
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20
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Blanco J, Moroño Á, Arévalo F, Correa J, Salgado C, Rossignoli AE, Lamas JP. Twenty-Five Years of Domoic Acid Monitoring in Galicia (NW Spain): Spatial, Temporal and Interspecific Variations. Toxins (Basel) 2021; 13:756. [PMID: 34822540 PMCID: PMC8624277 DOI: 10.3390/toxins13110756] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/15/2021] [Accepted: 10/21/2021] [Indexed: 01/15/2023] Open
Abstract
Prevalence, impact on shellfish resources and interspecific, spatial, and temporal variabilities of domoic acid (DA) in bivalves from Galicia (NW Spain) have been studied based on more than 25 years of monitoring data. The maximum prevalence (samples in which DA was detected) (100%) and incidence (samples with DA levels above the regulatory limit) (97.4%) were recorded in Pecten maximus, and the minimum ones in Mytilus galloprovincialis (12.6 and 1.1%, respectively). The maximum DA concentrations were 663.9 mg kg-1 in P. maximus and 316 mg kg-1 in Venerupis corrugata. After excluding scallop P. maximusdata, DA was found (prevalence) in 13.3% of bivalve samples, with 1.3% being over the regulatory limit. In general, the prevalence of this toxin decreased towards the North but not the magnitude of its episodes. The seasonal distribution was characterized by two maxima, in spring and autumn, with the later decreasing in intensity towards the north. DA levels decreased slightly over the studied period, although this decreasing trend was not linear. A cyclic pattern was observed in the interannual variability, with cycles of 4 and 11 years. Intoxication and detoxification rates were slower than those expected from laboratory experiments, suggesting the supply of DA during these phases plays an important role.
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Affiliation(s)
- Juan Blanco
- Centro de Investigacións Mariñas, Xunta de Galicia, Dirección Pedras de Corón, 36620 Vilanova de Arousa, Spain;
| | - Ángeles Moroño
- Instituto Tecnolóxico para o Control de Medio Mariño, 36611 Vilagarcía de Arousa, Spain; (Á.M.); (F.A.); (J.C.); (C.S.); (J.P.L.)
| | - Fabiola Arévalo
- Instituto Tecnolóxico para o Control de Medio Mariño, 36611 Vilagarcía de Arousa, Spain; (Á.M.); (F.A.); (J.C.); (C.S.); (J.P.L.)
| | - Jorge Correa
- Instituto Tecnolóxico para o Control de Medio Mariño, 36611 Vilagarcía de Arousa, Spain; (Á.M.); (F.A.); (J.C.); (C.S.); (J.P.L.)
| | - Covadonga Salgado
- Instituto Tecnolóxico para o Control de Medio Mariño, 36611 Vilagarcía de Arousa, Spain; (Á.M.); (F.A.); (J.C.); (C.S.); (J.P.L.)
| | - Araceli E. Rossignoli
- Centro de Investigacións Mariñas, Xunta de Galicia, Dirección Pedras de Corón, 36620 Vilanova de Arousa, Spain;
| | - J. Pablo Lamas
- Instituto Tecnolóxico para o Control de Medio Mariño, 36611 Vilagarcía de Arousa, Spain; (Á.M.); (F.A.); (J.C.); (C.S.); (J.P.L.)
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21
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Changing Trends in Paralytic Shellfish Poisonings Reflect Increasing Sea Surface Temperatures and Practices of Indigenous and Recreational Harvesters in British Columbia, Canada. Mar Drugs 2021; 19:md19100568. [PMID: 34677468 PMCID: PMC8538720 DOI: 10.3390/md19100568] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 11/16/2022] Open
Abstract
Paralytic shellfish poisoning (PSP) occurs when shellfish contaminated with saxitoxin or equivalent paralytic shellfish toxins (PSTs) are ingested. In British Columbia, Canada, documented poisonings are increasing in frequency based on 62 investigations identified from 1941–2020. Two PSP investigations were reported between 1941 and 1960 compared to 31 since 2001 (p < 0.0001) coincident with rising global temperatures (r2 = 0.76, p < 0.006). The majority of PSP investigations (71%) and cases (69%) were linked to self-harvested shellfish. Far more investigations involved harvests by indigenous communities (24%) than by commercial and recreational groups. Single-case-exposure investigations increased by more than 3.5 times in the decade 2011–2020 compared to previous periods. Clams (47%); mussels (26%); oysters (14%); scallops (6%); and, in more recent years, crabs (4%) were linked to illnesses. To guide understanding of self-harvesting consumption risks, we recommend collecting data to determine when PST-producing algae are present in high concentrations, improving the quality of data in online shellfish harvest maps to include dates of last testing; biotoxin testing results; and a description of bivalve species tested. Over reliance on toxin results in biomonitored species may not address actual consumption risks for unmonitored species harvested from the same area. We further recommend introducing phytoplankton monitoring in remote indigenous communities where self-harvesting is common and toxin testing is unavailable, as well as continuing participatory education about biotoxin risks in seafoods.
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Naknaen A, Ratsameepakai W, Suttinun O, Sukpondma Y, Khan E, Pomwised R. Microcystis Sp. Co-Producing Microcystin and Saxitoxin from Songkhla Lake Basin, Thailand. Toxins (Basel) 2021; 13:toxins13090631. [PMID: 34564635 PMCID: PMC8472854 DOI: 10.3390/toxins13090631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/01/2021] [Accepted: 09/03/2021] [Indexed: 11/16/2022] Open
Abstract
The Songkhla Lake Basin (SLB) located in Southern Thailand, has been increasingly polluted by urban and industrial wastewater, while the lake water has been intensively used. Here, we aimed to investigate cyanobacteria and cyanotoxins in the SLB. Ten cyanobacteria isolates were identified as Microcystis genus based on16S rDNA analysis. All isolates harbored microcystin genes, while five of them carried saxitoxin genes. On day 15 of culturing, the specific growth rate and Chl-a content were 0.2-0.3 per day and 4 µg/mL. The total extracellular polymeric substances (EPS) content was 0.37-0.49 µg/mL. The concentration of soluble EPS (sEPS) was 2 times higher than that of bound EPS (bEPS). The protein proportion in both sEPS and bEPS was higher than the carbohydrate proportion. The average of intracellular microcystins (IMCs) was 0.47 pg/cell on day 15 of culturing, while extracellular microcystins (EMCs) were undetectable. The IMCs were dramatically produced at the exponential phase, followed by EMCs release at the late exponential phase. On day 30, the total microcystins (MCs) production reached 2.67 pg/cell. Based on liquid chromatograph-quadrupole time-of-flight mass spectrometry, three new MCs variants were proposed. This study is the first report of both decarbamoylsaxitoxin (dcSTX) and new MCs congeners synthesized by Microcystis.
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Affiliation(s)
- Ampapan Naknaen
- Environmental Assessment and Technology for Hazardous Waste Management Research Center, Faculty of Environmental Management, Prince of Songkla University, Hat Yai 90110, Thailand; (A.N.); (O.S.)
| | - Waraporn Ratsameepakai
- Office of Scientific Instrument and Testing, Prince of Songkla University, Hat Yai 90110, Thailand;
| | - Oramas Suttinun
- Environmental Assessment and Technology for Hazardous Waste Management Research Center, Faculty of Environmental Management, Prince of Songkla University, Hat Yai 90110, Thailand; (A.N.); (O.S.)
- Center of Excellence on Hazardous Substance Management (HSM), Bangkok 10330, Thailand
| | - Yaowapa Sukpondma
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai 90110, Thailand;
| | - Eakalak Khan
- Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, NV 89154-4015, USA;
| | - Rattanaruji Pomwised
- Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai 90110, Thailand
- Correspondence: ; Tel.: +66-74-288-325
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Preece EP, Hobbs W, Hardy FJ, O'Garro L, Frame E, Sweeney F. Prevalence and persistence of microcystin in shoreline lake sediments and porewater, and associated potential for human health risk. CHEMOSPHERE 2021; 272:129581. [PMID: 33482515 DOI: 10.1016/j.chemosphere.2021.129581] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 01/01/2021] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
Midlatitude waterbodies are experiencing increased cyanobacteria blooms that necessitate health advisories to protect waterbody users. Although surface waters may contain cyanotoxins such as microcystin (MC), at concentrations that pose potential public health risks, little is known about MC contamination of shoreline sediments. Based on growing evidence that lake and reservoir sediments can accumulate MCs, we hypothesized that shoreline sediments (i.e., recreational beaches) may accumulate MCs and thereby pose a potential health risk to recreational users even if people stay out of contaminated water. We sampled nearshore surface water, shoreline sediment, and porewater from seven Washington State, USA, lakes/reservoirs recreational beaches to determine MC presence/absence during or immediately following cyanobacteria blooms. We found MCs in shoreline sediments at all waterbodies using ELISA and LC-MS/MS. MC concentrations in shoreline sediments and porewaters persisted for 20 days following dissipation of cyanobacteria blooms when MC concentrations were near analytical reporting limits in corresponding surface waters. A human health risk assessment based on potential MC exposure through incidental ingestion of porewaters and sediments found, even when very high MC concentrations occur in surface waters (i.e., >11,000 μg/L), estimated ingestion doses are below MC World Health Organization tolerable daily intake and U.S. Environmental Protection Agency's risk reference dose. While our findings suggest MCs in Washington State recreational beaches in 2018 did not present a significant human health risk, future blooms with higher MC concentrations could pose human health risks via the shoreline sediment/porewater exposure pathway.
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Affiliation(s)
| | - William Hobbs
- Washington State Department of Ecology, PO Box 47600, Olympia, WA, USA.
| | - F Joan Hardy
- Washington Department of Health, 243 Israel Rd SE, Tumwater, WA, USA.
| | - Lenford O'Garro
- Washington Department of Health, 243 Israel Rd SE, Tumwater, WA, USA.
| | - Elizabeth Frame
- King County Environmental Laboratory, 322 W Ewing St. Seattle, WA, USA.
| | - Francis Sweeney
- King County Environmental Laboratory, 322 W Ewing St. Seattle, WA, USA.
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Yang Y, Yu G, Chen Y, Jia N, Li R. Four decades of progress in cylindrospermopsin research: The ins and outs of a potent cyanotoxin. JOURNAL OF HAZARDOUS MATERIALS 2021; 406:124653. [PMID: 33321325 DOI: 10.1016/j.jhazmat.2020.124653] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/19/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
The cyanotoxin cylindrospermopsin (CYN), a toxic metabolite from cyanobacteria, is of particular concern due to its cosmopolitan occurrence, aquatic bioaccumulation, and multi-organ toxicity. CYN is the second most often recorded cyanotoxin worldwide, and cases of human morbidity and animal mortality are associated with ingestion of CYN contaminated water. The toxin poses a great challenge for drinking water treatment plants and public health authorities. CYN, with the major toxicity manifested in the liver, is cytotoxic, genotoxic, immunotoxic, neurotoxic and may be carcinogenic. Adverse effects are also reported for endocrine and developmental processes. We present a comprehensive review of CYN over the past four decades since its first reported poisoning event, highlighting its global occurrence, biosynthesis, toxicology, removal, and monitoring. In addition, current data gaps are identified, and future directions for CYN research are outlined. This review is beneficial for understanding the ins and outs of this environmental pollutant, and for robustly assessing health hazards posed by CYN exposure to humans and other organisms.
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Affiliation(s)
- Yiming Yang
- Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Guangzhou, Guangdong 510182, China
| | - Gongliang Yu
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China
| | - Youxin Chen
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China
| | - Nannan Jia
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, Hubei 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Renhui Li
- College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang 325035, China.
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25
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Rourke WA, Justason A, Martin JL, Murphy CJ. Shellfish Toxin Uptake and Depuration in Multiple Atlantic Canadian Molluscan Species: Application to Selection of Sentinel Species in Monitoring Programs. Toxins (Basel) 2021; 13:toxins13020168. [PMID: 33671640 PMCID: PMC7926447 DOI: 10.3390/toxins13020168] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/10/2021] [Accepted: 02/15/2021] [Indexed: 01/25/2023] Open
Abstract
Shellfish toxin monitoring programs often use mussels as the sentinel species to represent risk in other bivalve shellfish species. Studies have examined accumulation and depuration rates in various species, but little information is available to compare multiple species from the same harvest area. A 2-year research project was performed to validate the use of mussels as the sentinel species to represent other relevant eastern Canadian shellfish species (clams, scallops, and oysters). Samples were collected simultaneously from Deadmans Harbour, NB, and were tested for paralytic shellfish toxins (PSTs) and amnesic shellfish toxin (AST). Phytoplankton was also monitored at this site. Scallops accumulated PSTs and AST sooner, at higher concentrations, and retained toxins longer than mussels. Data from monitoring program samples in Mahone Bay, NS, are presented as a real-world validation of findings. Simultaneous sampling of mussels and scallops showed significant differences between shellfish toxin results in these species. These data suggest more consideration should be given to situations where multiple species are present, especially scallops.
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Affiliation(s)
- Wade A. Rourke
- Dartmouth Laboratory, Canadian Food Inspection Agency, 1992 Agency Drive, Dartmouth, NS B3B 1Y9, Canada;
- Correspondence:
| | - Andrew Justason
- New Brunswick Operations, Canadian Food Inspection Agency, 99 Mount Pleasant Road, P.O. Box 1036, St. George, NB E5C 3S9, Canada;
| | - Jennifer L. Martin
- St. Andrews Biological Station, Fisheries and Oceans Canada, 125 Marine Science Drive, St. Andrews, NB E5B 0E4, Canada;
| | - Cory J. Murphy
- Dartmouth Laboratory, Canadian Food Inspection Agency, 1992 Agency Drive, Dartmouth, NS B3B 1Y9, Canada;
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Li J, Persson KM. Quick detection method for paralytic shellfish toxins (PSTs) monitoring in freshwater - A review. CHEMOSPHERE 2021; 265:128591. [PMID: 33189391 DOI: 10.1016/j.chemosphere.2020.128591] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 09/17/2020] [Accepted: 09/19/2020] [Indexed: 06/11/2023]
Abstract
The objective of this critical review was to provide a comprehensive summary of paralytic shellfish toxins (PSTs) producing species and knowledge gaps in detecting PSTs in drinking water resources, with a focus on recent development of PSTs monitoring methods and tools for drinking water monitoring. PSTs, which are also called Saxitoxins (STXs), are a group of neurotoxins not only produced by marine dinoflagellates but also freshwater cyanobacteria. The presence of PSTs in freshwater has been reported from all continents except Antarctica. PSTs in poisoned sea food such as shellfish, molluscs and crustaceans may attack the nerve system after consumption. The high incidences of PSTs occurring in drinking water sources showed another route of potential human exposure. A development of simple and fast screening tools for drinking water surveillance of PSTs is needed. Neurotoxins produced by freshwater cyanobacteria are understudied relative to microcystin and little study is done around PSTs in drinking water monitoring. Some fast screening methods exist. The critical issues for using them in water surveillance, particularly matrix effect and cross-reactivity are summarized, and future research directions are high-lighted. We conclude that monitoring routines at drinking water resources should start from species level, followed by a profound screening of toxin profile. For practical monitoring routine, fast screening methods should be combined with highly sensitive and accurate analytical methods such as liquid chromatography/liquid chromatography-mass spectrometry (LC/LC-MS). A thorough understanding of toxin profile in source water is necessary for screening tool selection.
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Affiliation(s)
- Jing Li
- Division of Water Resources Engineering, Faculty of Engineering LTH, Lund University, P.O. Box 118, SE-221 00, Lund, Sweden.
| | - Kenneth M Persson
- Division of Water Resources Engineering, Faculty of Engineering LTH, Lund University, P.O. Box 118, SE-221 00, Lund, Sweden
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27
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Colas S, Marie B, Lance E, Quiblier C, Tricoire-Leignel H, Mattei C. Anatoxin-a: Overview on a harmful cyanobacterial neurotoxin from the environmental scale to the molecular target. ENVIRONMENTAL RESEARCH 2021; 193:110590. [PMID: 33307089 DOI: 10.1016/j.envres.2020.110590] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 11/06/2020] [Accepted: 12/02/2020] [Indexed: 06/12/2023]
Abstract
Anatoxin-a (ATX-a) is a neurotoxic alkaloid, produced by several freshwater planktonic and benthic cyanobacteria (CB). Such CB have posed human and animal health issues for several years, as this toxin is able to cause neurologic symptoms in humans following food poisoning and death in wild and domestic animals. Different episodes of animal intoxication have incriminated ATX-a worldwide, as confirmed by the presence of ATX-a-producing CB in the consumed water or biofilm, or the observation of neurotoxic symptoms, which match experimental toxicity in vivo. Regarding toxicity parameters, toxicokinetics knowledge is currently incomplete and needs to be improved. The toxin can passively cross biological membranes and act rapidly on nicotinic receptors, its main molecular target. In vivo and in vitro acute effects of ATX-a have been studied and make possible to draw its mode of action, highlighting its deleterious effects on the nervous systems and its effectors, namely muscles, heart and vessels, and the respiratory apparatus. However, very little is known about its putative chronic toxicity. This review updates available data on ATX-a, from the ecodynamic of the toxin to its physiological and molecular targets.
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Affiliation(s)
- Simon Colas
- UMR 7245 CNRS/MNHN "Molécules de Communication et Adaptations des Micro-organismes", Muséum National d'Histoire Naturelle, Paris, France; Mitochondrial and Cardiovascular Pathophysiology - MITOVASC, UMR CNRS 6015, INSERM U1083, UBL/Angers University, Angers, France
| | - Benjamin Marie
- UMR 7245 CNRS/MNHN "Molécules de Communication et Adaptations des Micro-organismes", Muséum National d'Histoire Naturelle, Paris, France
| | - Emilie Lance
- UMR 7245 CNRS/MNHN "Molécules de Communication et Adaptations des Micro-organismes", Muséum National d'Histoire Naturelle, Paris, France
| | - Catherine Quiblier
- UMR 7245 CNRS/MNHN "Molécules de Communication et Adaptations des Micro-organismes", Muséum National d'Histoire Naturelle, Paris, France; Université de Paris - Paris Diderot, 5 rue Thomas Mann, Paris, France
| | - Hélène Tricoire-Leignel
- Mitochondrial and Cardiovascular Pathophysiology - MITOVASC, UMR CNRS 6015, INSERM U1083, UBL/Angers University, Angers, France.
| | - César Mattei
- Mitochondrial and Cardiovascular Pathophysiology - MITOVASC, UMR CNRS 6015, INSERM U1083, UBL/Angers University, Angers, France.
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28
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Hardy FJ, Preece E, Backer L. Status of state cyanoHAB outreach and monitoring efforts, United States. LAKE AND RESERVOIR MANAGEMENT 2021; 37:246-260. [PMID: 35928550 PMCID: PMC9348555 DOI: 10.1080/10402381.2020.1863530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A widespread effort is underway to improve awareness of cyanobacteria harmful algal blooms (cyanoHABs) across the United States using a variety of monitoring programs and public health outreach measures to protect people, pets, and livestock. To determine the status of cyanoHAB outreach and monitoring efforts, 2 questionnaires were distributed to health/environmental departments in 50 states and the District of Columbia (DC). One questionnaire focused on cyanoHAB exposure to humans from drinking water and the second targeted exposure through recreational activities. All states plus DC responded to the recreational survey; 46 states plus DC responded to the drinking water survey. All states except Alaska answered that microcystins were the cyanotoxins of greatest concern for recreational exposure; microcystins were also of greatest concern for drinking water with the exception of Utah (anatoxin-a in reservoirs was greatest concern) and Rhode Island (microcystins and anatoxin-a in reservoirs/ponds were greatest concern). Regional comparisons disclosed a lack of cyanoHAB programs in southern states relative to northern states that may be related to the higher percentage of water surface area in northern states. Interestingly, recreational outreach is more extensive than drinking water outreach (only 16 states reported having some type of drinking water outreach program, compared with 35 states with recreational outreach), and preferred outreach methods are websites and press releases. Additionally, respondents reported very limited funding for outreach and monitoring programs. Our results establish baseline information to help determine what future direction cyanoHAB outreach and monitoring programs can take at local, regional, and national levels.
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Affiliation(s)
- F. Joan Hardy
- Washington State Department of Health, Olympia, WA 98504-7890
| | | | - Lorraine Backer
- Centers for Disease Control and Prevention, National Center for Environmental Health, Chamblee, GA
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29
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Scarlett KR, Kim S, Lovin LM, Chatterjee S, Scott JT, Brooks BW. Global scanning of cylindrospermopsin: Critical review and analysis of aquatic occurrence, bioaccumulation, toxicity and health hazards. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 738:139807. [PMID: 32585507 PMCID: PMC8204307 DOI: 10.1016/j.scitotenv.2020.139807] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 05/27/2020] [Accepted: 05/28/2020] [Indexed: 05/03/2023]
Abstract
Cylindrospermopsin (CYN), a cyanotoxin produced by harmful algal blooms, has been reported worldwide; however, there remains limited understanding of its potential risks to surface water quality. In the present study, we critically reviewed available literature regarding the global occurrence, bioaccumulation, and toxicity of CYN in aquatic systems with a particular focus on freshwater. We subsequently developed environmental exposure distributions (EEDs) for CYN in surface waters and performed probabilistic environmental hazard assessments (PEHAs) using guideline values (GVs). PEHAs were performed by geographic region, type of aquatic system, and matrix. CYN occurrence was prevalent in North America, Europe, and Asia/Pacific, with lakes being the most common system. Many global whole water EEDs exceeded guideline values (GV) previously developed for drinking water (e.g., 0.5 μg L-1) and recreational water (e.g., 1 μg L-1). GV exceedances were higher in the Asia/Pacific region, and in rivers and reservoirs. Rivers in the Asia/Pacific region exceeded the lowest drinking water GV 73.2% of the time. However, lack of standardized protocols used for analyses was alarming, which warrants improvement in future studies. In addition, bioaccumulation of CYN has been reported in mollusks, crustaceans, and fish, but such exposure information remains limited. Though several publications have reported aquatic toxicity of CYN, there is limited chronic aquatic toxicity data, especially for higher trophic level organisms. Most aquatic toxicity studies have not employed standardized experimental designs, failed to analytically verify treatment levels, and did not report purity of CYN used for experiments; therefore, existing data are insufficient to derive water quality guidelines. Considering such elevated exceedances of CYN in global surface waters and limited aquatic bioaccumulation and toxicity data, further aquatic monitoring, environmental fate and mechanistic toxicology studies are warranted to robustly assess and manage water quality risks to public health and the environment.
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Affiliation(s)
- Kendall R Scarlett
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA; Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA
| | - Sujin Kim
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA; Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA
| | - Lea M Lovin
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA; Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA
| | - Saurabh Chatterjee
- Environmental Health and Disease Laboratory, Department Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, USA
| | - J Thad Scott
- Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA; Department of Biology, Baylor University, Waco, TX 76798, USA
| | - Bryan W Brooks
- Department of Environmental Science, Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA; Center for Reservoir and Aquatic Systems Research, Baylor University, Waco, TX 76798, USA; Institute of Biomedical Studies, Baylor University, Waco, TX 76798, USA.
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Christensen VG, Khan E. Freshwater neurotoxins and concerns for human, animal, and ecosystem health: A review of anatoxin-a and saxitoxin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 736:139515. [PMID: 32485372 DOI: 10.1016/j.scitotenv.2020.139515] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/15/2020] [Accepted: 05/16/2020] [Indexed: 05/06/2023]
Abstract
Toxic cyanobacteria are a concern worldwide because they can adversely affect humans, animals, and ecosystems. However, neurotoxins produced by freshwater cyanobacteria are understudied relative to microcystin. Thus, the objective of this critical review was to provide a comprehensive examination of the modes of action, production, fate, and occurrence of the freshwater neurotoxins anatoxin-a and saxitoxin as they relate to human, animal, and ecosystem health. Literature on freshwater anatoxin-a and saxitoxin was obtained and reviewed for both laboratory and field studies. Current (2020) research identifies as many as 41 anatoxin-a producing species and 15 saxitoxin-producing species of freshwater cyanobacteria. Field studies indicate that anatoxin-a and saxitoxin have widespread distribution, and examples are given from every continent except Antarctica. Human and animal health concerns can range from acute to chronic. However, few researchers studied chronic or sublethal effects of freshwater exposures to anatoxin-a or saxitoxin. Ecosystem health also is a concern, as the effects of toxicity may be far reaching and include consequences throughout the food web. Several gaps in knowledge were identified for anatoxin-a and saxitoxin, including triggers of production and release, environmental fate and degradation, primary and secondary exposure routes, diel variation, food web effects, effects of cyanotoxin mixtures, and sublethal health effects on individual organisms and populations. Despite the gaps, this critical review facilitates our current understanding of freshwater neurotoxins and thus can serve to `` guide future research on anatoxin-a, saxitoxin, and other cyanotoxins.
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Affiliation(s)
- Victoria G Christensen
- U.S. Geological Survey, Upper Midwest Water Science Center, Mounds View, MN, USA; North Dakota State University, Environmental and Conservation Sciences Program, Fargo, ND, USA.
| | - Eakalak Khan
- Civil and Environmental Engineering and Construction Department, University of Nevada - Las Vegas, Las Vegas, NV, USA
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31
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De Bock MFS, Moraes GSDO, Almeida RGDS, Vieira KDDS, Santoro KR, Bicudo ÁJDA, Molica RJR. Exposure of Nile Tilapia (Oreochromis niloticus) Fingerlings to a Saxitoxin-Producing Strain of Raphidiopsis (Cylindrospermopsis) raciborskii (Cyanobacterium) Reduces Growth Performance and Increases Mortality Rate. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2020; 39:1409-1420. [PMID: 32323358 DOI: 10.1002/etc.4728] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/04/2020] [Accepted: 04/17/2020] [Indexed: 06/11/2023]
Abstract
Blooms of toxin-producing cyanobacteria have been more frequent and lasting because of the eutrophication of freshwater ecosystems, including those used for aquaculture. The aim of the present study was to investigate the effects of chronic exposure to a saxitoxin-producing strain of Raphidiopsis (Cylindrospermopsis) raciborskii on the performance of Nile tilapia (Oreochromis niloticus) fingerlings over a 60-d period. The fingerlings were cultivated under the following conditions: 1) water without cyanobacterium (WATER), 2) R. raciborskii in ASM-1 culture medium (CYANO), and 3) ASM-1 culture medium without cyanobacterium (ASM). Exposure to the CYANO treatment led to a significant increase in the mortality rate (p < 0.05) and a significant reduction in growth (p < 0.05) compared to fingerlings submitted to the ASM and WATER treatments, in which similar survival and growth were found (p > 0.05). Saxitoxin toxicity was dependent on the weight of the fingerling (p < 0.05), with maximum mortality caused by the ingestion of 13.66 μg saxitoxin equivalent L-1 g-1 . The present results clearly show the harm caused by saxitoxins to the production of Nile tilapia fingerlings in the early growth phase. These findings underscore the importance of maintaining adequate water quality in aquaculture activities to minimize the risk of saxitoxin-producing cyanobacterial blooms and avoid economic losses among producers. Environ Toxicol Chem 2020;39:1409-1420. © 2020 SETAC.
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Affiliation(s)
| | | | | | | | - Kleber Régis Santoro
- Garanhuns Academic Unit, Rural Federal University of Pernambuco, Garanhuns, Pernambuco, Brazil
- Graduate Program in Biometrics and Applied Statistics, Rural Federal University of Pernambuco, Recife, Pernambuco, Brazil
| | | | - Renato José Reis Molica
- Garanhuns Academic Unit, Rural Federal University of Pernambuco, Garanhuns, Pernambuco, Brazil
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The Southeast Alaska Tribal Ocean Research (SEATOR) Partnership: Addressing Data Gaps in Harmful Algal Bloom Monitoring and Shellfish Safety in Southeast Alaska. Toxins (Basel) 2020; 12:toxins12060407. [PMID: 32575620 PMCID: PMC7354620 DOI: 10.3390/toxins12060407] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/12/2020] [Accepted: 06/15/2020] [Indexed: 12/14/2022] Open
Abstract
Many communities in Southeast Alaska harvest shellfish such as mussels and clams as an important part of a subsistence or traditional diet. Harmful algal blooms (HABs) of phytoplankton such as Alexandrium spp. produce toxins that can accumulate in shellfish tissues to concentrations that can pose a hazard for human health. Since 2013, several tribal governments and communities have pooled resources to form the Southeast Alaska Tribal Ocean Research (SEATOR) network, with the goal of minimizing risks to seafood harvest and enhancing food security. SEATOR monitors toxin concentrations in shellfish and collects and consolidates data on environmental variables that may be important predictors of toxin levels such as sea surface temperature and salinity. Data from SEATOR are publicly available and are encouraged to be used for the development and testing of predictive algorithms that could improve seafood risk assessment in Southeast Alaska. To date, more than 1700 shellfish samples have been analyzed for paralytic shellfish toxins (PSTs) in more than 20 locations, with potentially lethal concentrations observed in blue mussels (Mytilus trossulus) and butter clams (Saxidomus gigantea). Concentrations of PSTs exhibit seasonality in some species, and observations of Alexandrium are correlated to sea surface temperature and salinity; however, concentrations above the threshold of concern have been found in all months, and substantial variation in concentrations of PSTs remain unexplained.
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Biré R, Bertin T, Dom I, Hort V, Schmitt C, Diogène J, Lemée R, De Haro L, Nicolas M. First Evidence of the Presence of Anatoxin-A in Sea Figs Associated with Human Food Poisonings in France. Mar Drugs 2020; 18:md18060285. [PMID: 32485965 PMCID: PMC7344475 DOI: 10.3390/md18060285] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/19/2020] [Accepted: 05/24/2020] [Indexed: 11/17/2022] Open
Abstract
From January 2011 to March 2018, 26 patients aged from 20 to 80 years old reported being sick in France after eating sea figs of the genus Microcosmus. The patients had symptoms evoking a cerebellar syndrome: blurred or double vision, ataxia and dizziness, asthenia, headache, muscle cramps, paresthesia and digestive disorders (nausea, vomiting and diarrhea). Three of the 18 food poisoning events recorded by the Poison Control Center in Marseille and involving four patients were further investigated as the meal leftovers were collected and analyzed. A previous study ruled out the presence of the regulated lipophilic marine toxins after high-resolution mass spectrometry, but further analyses were required to look for hydrophilic cyanotoxins. The sea fig leftovers from food poisoning case Numbers 1 (January 2011), 6 (December 2012) and 17 (March 2018) of this published case series were analyzed by hydrophilic interaction liquid chromatography coupled to low- and high-resolution mass spectrometry to investigate the presence of hydrophilic cyanotoxins. The sea fig samples showed anatoxin-a (ATX-a) concentrations ranging from 193.7 to 1240.2 µg/kg. The sea fig control sample analyzed was also contaminated with ATX-a but in a much smaller concentration (22.5 µg/kg). To the best of our knowledge, this is the first report of human food poisoning involving ATX-a as the possible causative toxin where the cyanotoxin could be unequivocally identified.
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Affiliation(s)
- Ronel Biré
- Laboratory for Food Safety, Université Paris-Est, ANSES, F-94701 Maisons-Alfort, France; (T.B.); (I.D.); (V.H.); (M.N.)
- Correspondence:
| | - Thomas Bertin
- Laboratory for Food Safety, Université Paris-Est, ANSES, F-94701 Maisons-Alfort, France; (T.B.); (I.D.); (V.H.); (M.N.)
| | - Inès Dom
- Laboratory for Food Safety, Université Paris-Est, ANSES, F-94701 Maisons-Alfort, France; (T.B.); (I.D.); (V.H.); (M.N.)
| | - Vincent Hort
- Laboratory for Food Safety, Université Paris-Est, ANSES, F-94701 Maisons-Alfort, France; (T.B.); (I.D.); (V.H.); (M.N.)
| | - Corinne Schmitt
- Clinical Pharmacology, Poison Control Center, St Marguerite Hospital, 13009 Marseille, France; (C.S.); (L.D.H.)
| | - Jorge Diogène
- Marine Continental Waters, IRTA, Ctra. Poble Nou, km 5.5, 43540 Sant Carles de la Ràpita, Spain;
| | - Rodolphe Lemée
- Laboratoire d’Océanographie de Villefranche, Sorbonne Université, CNRS, LOV, F-06230 Villefranche-sur-Mer, France;
| | - Luc De Haro
- Clinical Pharmacology, Poison Control Center, St Marguerite Hospital, 13009 Marseille, France; (C.S.); (L.D.H.)
| | - Marina Nicolas
- Laboratory for Food Safety, Université Paris-Est, ANSES, F-94701 Maisons-Alfort, France; (T.B.); (I.D.); (V.H.); (M.N.)
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Zhong Y, Shen L, Ye X, Zhou D, He Y, Li Y, Ding Y, Zhu W, Ding J, Zhang H. Neurotoxic Anatoxin-a Can Also Exert Immunotoxicity by the Induction of Apoptosis on Carassius auratus Lymphocytes in vitro When Exposed to Environmentally Relevant Concentrations. Front Physiol 2020; 11:316. [PMID: 32351401 PMCID: PMC7174720 DOI: 10.3389/fphys.2020.00316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Accepted: 03/20/2020] [Indexed: 12/17/2022] Open
Abstract
Hazardous anatoxin-a (ANTX-a) is produced by freshwater algal blooms worldwide, which greatly increases the risk of consumer exposure. Although ANTX-a shows widespread neurotoxicity in aquatic animals, little is known about its mechanism of action and biotransformation in biological systems, especially in immunobiological models. In this study, transmission electron microscopy results showed that ANTX-a can destroy lymphocytes of Carassius auratus in vitro by inducing cytoplasmic concentration, vacuolation, and swollen mitochondria. DNA fragmentations clearly showed a ladder pattern in agarose gel electrophoresis, which demonstrated that the apoptosis of fish lymphocytes was caused by exposure to ANTX-a. Flow cytometry results showed that the apoptotic percentage of fish lymphocytes exposed to 0.01, 0.1, 1, and 10 mg/L of ANTX-a for 12 h reached 18.89, 22.89, 39.23, and 35.58%, respectively. ANTX-a exposure induced a significant increase in reactive oxygen species (ROS) and malonaldehyde (MDA) in lymphocytes. The activities of superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), glutathione peroxidase (GPx), and the glutathione (GSH) content of the 0.01 mg/L ANTX-a-treated group decreased significantly by about 41, 46, 67, and 54% compared with that of the control group (p < 0.01), respectively. Although these observations were dose-dependent, these results suggested that ANTX-a can induce lymphocyte apoptosis via intracellular oxidative stress and destroy the antioxidant system after a short exposure time of only 12 h. Besides neurotoxicity, ANTX-a may also be toxic to the immune system of fish, even when the fish are exposed to environmentally relevant concentrations, which clearly demonstrated that the potential health risks induced by ANTX-a in aquatic organisms requires attention.
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Affiliation(s)
- Yuchi Zhong
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Lilai Shen
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Xueping Ye
- Zhejiang Institute of Freshwater Fisheries, Huzhou, China
| | - Dongren Zhou
- Zhejiang Institute of Freshwater Fisheries, Huzhou, China
| | - Yunyi He
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Yan Li
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Ying Ding
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Weiqin Zhu
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Jiafeng Ding
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
| | - Hangjun Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, China
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Llana-Ruiz-Cabello M, Jos A, Cameán A, Oliveira F, Barreiro A, Machado J, Azevedo J, Pinto E, Almeida A, Campos A, Vasconcelos V, Freitas M. Analysis of the Use of Cylindrospermopsin and/or Microcystin-Contaminated Water in the Growth, Mineral Content, and Contamination of Spinacia oleracea and Lactuca sativa. Toxins (Basel) 2019; 11:E624. [PMID: 31661886 PMCID: PMC6891636 DOI: 10.3390/toxins11110624] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/20/2019] [Accepted: 10/25/2019] [Indexed: 01/08/2023] Open
Abstract
Cyanobacteria and cyanotoxins constitute a serious environmental and human health problem. Moreover, concerns are raised with the use of contaminated water in agriculture and vegetable production as this can lead to food contamination and human exposure to toxins as well as impairment in crop development and productivity. The objective of this work was to assess the susceptibility of two green vegetables, spinach and lettuce, to the cyanotoxins microcystin (MC) and cylindrospermopsin (CYN), individually and in mixture. The study consisted of growing both vegetables in hydroponics, under controlled conditions, for 21 days in nutrient medium doped with MC or CYN at 10 μg/L and 50 μg/L, or CYN/MC mixture at 5 + 5 μg/L and 25 + 25 μg/L. Extracts from M. aeruginosa and C. ovalisporum were used as sources of toxins. The study revealed growth inhibition of the aerial part (Leaves) in both species when treated with 50µg/L of MC, CYN and CYN/MC mixture. MC showed to be more harmful to plant growth than CYN. Moreover spinach leaves growth was inhibited by both 5 + 5 and 25 + 25 µg/L CYN/MC mixtures, whereas lettuce leaves growth was inhibited only by 25 + 25 µg/L CYN/MC mixture. Overall, growth data evidence increased sensitivity of spinach to cyanotoxins in comparison to lettuce. On the other hand, plants exposed to CYN/MC mixture showed differential accumulation of CYN and MC. In addition, CYN, but not MC, was translocated from the roots to the leaves. CYN and MC affected the levels of minerals particularly in plant roots. The elements most affected were Ca, K and Mg. However, in leaves K was the mineral that was affected by exposure to cyanotoxins.
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Affiliation(s)
- Maria Llana-Ruiz-Cabello
- Area of Toxicology, Faculty of Pharmacy, Universidad de Sevilla, Profesor García González n°2, 41012 Seville, Spain.
| | - Angeles Jos
- Area of Toxicology, Faculty of Pharmacy, Universidad de Sevilla, Profesor García González n°2, 41012 Seville, Spain.
| | - Ana Cameán
- Area of Toxicology, Faculty of Pharmacy, Universidad de Sevilla, Profesor García González n°2, 41012 Seville, Spain.
| | - Flavio Oliveira
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal.
| | - Aldo Barreiro
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal.
| | - Joana Machado
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal.
| | - Joana Azevedo
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal.
| | - Edgar Pinto
- LAQV/REQUIMTE, Departament of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal.
- Polytechnic Institute of Porto, Department of Environmental Health, School of Health, CISA/Research Center in Environment and Health, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, Portugal.
| | - Agostinho Almeida
- LAQV/REQUIMTE, Departament of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge de Viterbo Ferreira 228, 4050-313 Porto, Portugal.
| | - Alexandre Campos
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal.
| | - Vitor Vasconcelos
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal.
- Biology Department, Faculty of Sciences, University of Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal.
| | - Marisa Freitas
- CIIMAR/CIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos, s/n, 4450-208 Porto, Portugal.
- Polytechnic Institute of Porto, Department of Environmental Health, School of Health, CISA/Research Center in Environment and Health, Rua Dr. António Bernardino de Almeida, 400, 4200-072 Porto, Portugal.
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Shultz D, Campbell L, Kudela RM. Trends in Dinophysis abundance and diarrhetic shellfish toxin levels in California mussels (Mytilus californianus) from Monterey Bay, California. HARMFUL ALGAE 2019; 88:101641. [PMID: 31582160 DOI: 10.1016/j.hal.2019.101641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 07/12/2019] [Accepted: 07/12/2019] [Indexed: 06/10/2023]
Abstract
Diarrhetic shellfish toxins (DSTs) are produced by the marine dinoflagellate, Dinophysis, as well as select species of benthic Prorocentrum. The DSTs can bioaccumulate in shellfish and cause gastrointestinal illness when humans consume high levels of this toxin. Although not routinely monitored throughout the U.S., recent studies in Washington, Texas, and New York suggest DSTs may be widespread throughout U.S. coastal waters. This study describes a four-year time series (2013-2016) of Dinophysis concentration and DST level in California mussels (Mytilus californianus) from Santa Cruz Municipal Wharf (SCMW) in Monterey Bay, California. Results show a maximum Dinophysis concentration of 9404 cells/L during this study and suggest Dinophysis persists as a member of the background phytoplankton community throughout the year. In California mussels, DSTs were found at persistent low levels throughout the course of this study, and exceeded the FDA guidance level of 160 ng/g 19 out of 192 weeks sampled. Concentrations of Dinophysis alone are a positive but weak predictor of DST level in California mussels, and basic environmental variables (temperature, salinity, and nutrients) do not sufficiently explain variation in Dinophysis concentration at SCMW. This study demonstrates that Dinophysis in Monterey Bay are producing DSTs that accumulate in local shellfish throughout the year, occasionally reaching levels of concern.
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Affiliation(s)
- Dana Shultz
- Ocean Sciences Department, 1156 High Street, University of California, Santa Cruz, CA, 95064, United States.
| | - Lisa Campbell
- Department of Oceanography, Texas A&M University, College Station, TX, 77843, United States
| | - Raphael M Kudela
- Ocean Sciences Department, 1156 High Street, University of California, Santa Cruz, CA, 95064, United States
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Svirčev Z, Lalić D, Bojadžija Savić G, Tokodi N, Drobac Backović D, Chen L, Meriluoto J, Codd GA. Global geographical and historical overview of cyanotoxin distribution and cyanobacterial poisonings. Arch Toxicol 2019; 93:2429-2481. [DOI: 10.1007/s00204-019-02524-4] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 07/18/2019] [Indexed: 10/26/2022]
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Hinojosa MG, Gutiérrez-Praena D, Prieto AI, Guzmán-Guillén R, Jos A, Cameán AM. Neurotoxicity induced by microcystins and cylindrospermopsin: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 668:547-565. [PMID: 30856566 DOI: 10.1016/j.scitotenv.2019.02.426] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/25/2019] [Accepted: 02/27/2019] [Indexed: 05/26/2023]
Abstract
Microcystins (MCs) and cylindrospermopsin (CYN) are among the most frequent toxins produced by cyanobacteria. These toxic secondary metabolites are classified as hepatotoxins and cytotoxin, respectively. Furthermore, both may present the ability to induce damage to the nervous system. In this sense, there are many studies manifesting the potential of MCs to cause neurotoxicity both in vitro and in vivo, due to their probable capacity to cross the blood-brain-barrier through organic anion transporting polypeptides. Moreover, the presence of MCs has been detected in brain of several experimental models. Among the neurological effects, histopathological brain changes, deregulation of biochemical parameters in brain (production of oxidative stress and inhibition of protein phosphatases) and behavioral alterations have been described. It is noteworthy that minority variants such as MC-LF and -LW have demonstrated to exert higher neurotoxic effects compared to the most studied congener, MC-LR. By contrast, the available studies concerning CYN-neurotoxic effects are very scarce, mostly showing inflammation and apoptosis in neural murine cell lines, oxidative stress, and alteration of the acetylcholinesterase activity in vivo. However, more studies are required in order to clarify the neurotoxic potential of both toxins, as well as their possible contribution to neurodegenerative diseases.
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Affiliation(s)
- M G Hinojosa
- Area of Toxicology, Faculty of Pharmacy, Universidad de Sevilla, C/Profesor García González 2, 41012 Seville, Spain
| | - D Gutiérrez-Praena
- Area of Toxicology, Faculty of Pharmacy, Universidad de Sevilla, C/Profesor García González 2, 41012 Seville, Spain
| | - A I Prieto
- Area of Toxicology, Faculty of Pharmacy, Universidad de Sevilla, C/Profesor García González 2, 41012 Seville, Spain.
| | - R Guzmán-Guillén
- Area of Toxicology, Faculty of Pharmacy, Universidad de Sevilla, C/Profesor García González 2, 41012 Seville, Spain
| | - A Jos
- Area of Toxicology, Faculty of Pharmacy, Universidad de Sevilla, C/Profesor García González 2, 41012 Seville, Spain
| | - A M Cameán
- Area of Toxicology, Faculty of Pharmacy, Universidad de Sevilla, C/Profesor García González 2, 41012 Seville, Spain
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Wu HY, Luan QS, Guo MM, Gu HF, Zhai YX, Tan ZJ. Phycotoxins in scallops (Patinopecten yessoensis) in relation to source, composition and temporal variation of phytoplankton and cysts in North Yellow Sea, China. MARINE POLLUTION BULLETIN 2018; 135:1198-1204. [PMID: 30301019 DOI: 10.1016/j.marpolbul.2018.08.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 08/20/2018] [Accepted: 08/20/2018] [Indexed: 06/08/2023]
Abstract
The North Yellow Sea is a major aquaculture production area for the scallop Patinopecten yessoensis. In this study, the temporal and spatial variation of phycotoxins in scallops, phytoplankton, and their cysts were analyzed during a survey conducted from June 2011 to April 2012 around Zhangzi Island. The study area is a semi-enclosed epicontinental sea surrounded by the Shandong Peninsula, the Liaodong Peninsula and the Korean Peninsula. The three main results of the study were as follows: (1) The saxitoxin-group toxins, okadaic acid and analogues, and pectenotoxins were the major phycotoxin residues found in scallops; (2) Six kinds of toxic microalgae were identified, Protoperidinium spp., Gonyaulax spp., and Alexandrium spp. were the dominant taxa; Seven types of potential marine toxin-producing dinoflagellates, A. tamarense, A. catenella, Dinophysis fortii, G. catenatum, Gambierdiscus toxicus, Azadinium poporum, and Pseudo-nitzschia pungen were identified as the primary source of phycotoxins and were present at relatively high density from June to October; and (3) azaspiracids and domoic acid might be new potential sources of toxin pollution. This study represents the first assessment to phycotoxins around Zhangzi Island in the North Yellow Sea.
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Affiliation(s)
- Hai-Yan Wu
- Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture, Qingdao 266071, China; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Carbon-sink Fisheries Laboratory, Qingdao 266071, China.
| | - Qing-Shan Luan
- Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture, Qingdao 266071, China; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Carbon-sink Fisheries Laboratory, Qingdao 266071, China.
| | - Meng-Meng Guo
- Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture, Qingdao 266071, China; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Carbon-sink Fisheries Laboratory, Qingdao 266071, China.
| | - Hai-Feng Gu
- Third Institute of Oceanography, SOA, Xiamen 361005, China
| | - Yu-Xiu Zhai
- Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture, Qingdao 266071, China; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Carbon-sink Fisheries Laboratory, Qingdao 266071, China.
| | - Zhi-Jun Tan
- Key Laboratory of Testing and Evaluation for Aquatic Product Safety and Quality, Ministry of Agriculture, Qingdao 266071, China; Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China; Carbon-sink Fisheries Laboratory, Qingdao 266071, China.
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Alcántara I, Piccini C, Segura A, Deus S, González C, Martínez de la Escalera G, Kruk C. Improved biovolume estimation of Microcystis aeruginosa colonies: A statistical approach. J Microbiol Methods 2018; 151:20-27. [DOI: 10.1016/j.mimet.2018.05.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 05/24/2018] [Accepted: 05/24/2018] [Indexed: 01/05/2023]
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Diel Variations in Cell Abundance and Trophic Transfer of Diarrheic Toxins during a Massive Dinophysis Bloom in Southern Brazil. Toxins (Basel) 2018; 10:toxins10060232. [PMID: 29882830 PMCID: PMC6024776 DOI: 10.3390/toxins10060232] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 06/02/2018] [Accepted: 06/04/2018] [Indexed: 11/16/2022] Open
Abstract
Dinophysis spp. are a major source of diarrheic toxins to marine food webs, especially during blooms. This study documented the occurrence, in late May 2016, of a massive toxic bloom of the Dinophysis acuminata complex along the southern coast of Brazil, associated with an episode of marked salinity stratification. The study tracked the daily vertical distribution of Dinophysis spp. cells and their ciliate prey, Mesodinium cf. rubrum, and quantified the amount of lipophilic toxins present in seston and accumulated by various marine organisms in the food web. The abundance of the D. acuminata complex reached 43 × 10⁴ cells·L−1 at 1.0 m depth at the peak of the bloom. Maximum cell densities of cryptophyceans and M. cf. rubrum (>500 × 10⁴ and 18 × 10⁴ cell·L−1, respectively) were recorded on the first day of sampling, one week before the peak in abundance of the D. acuminata complex. The diarrheic toxin okadaic acid (OA) was the only toxin detected during the bloom, attaining unprecedented, high concentrations of up to 829 µg·L−1 in seston, and 143 ± 93 pg·cell−1 in individually picked cells of the D. acuminata complex. Suspension-feeders such as the mussel, Perna perna, and barnacle, Megabalanus tintinnabulum, accumulated maximum OA levels (up to 578.4 and 21.9 µg total OA·Kg−1, respectively) during early bloom stages, whereas predators and detritivores such as Caprellidae amphipods (154.6 µg·Kg−1), Stramonita haemastoma gastropods (111.6 µg·Kg−1), Pilumnus spinosissimus crabs (33.4 µg·Kg−1) and a commercially important species of shrimp, Xiphopenaeus kroyeri (7.2 µg·Kg−1), only incorporated OA from mid- to late bloom stages. Conjugated forms of OA were dominant (>70%) in most organisms, except in blenny fish, Hypleurochilus fissicornis, and polychaetes, Pseudonereis palpata (up to 59.3 and 164.6 µg total OA·Kg−1, respectively), which contained mostly free-OA throughout the bloom. Although algal toxins are only regulated in bivalves during toxic blooms in most countries, including Brazil, this study indicates that human seafood consumers might be exposed to moderate toxin levels from a variety of other vectors during intense toxic outbreaks.
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Nicolas J, Hoogenboom RL, Hendriksen PJ, Bodero M, Bovee TF, Rietjens IM, Gerssen A. Marine biotoxins and associated outbreaks following seafood consumption: Prevention and surveillance in the 21st century. GLOBAL FOOD SECURITY-AGRICULTURE POLICY ECONOMICS AND ENVIRONMENT 2017. [DOI: 10.1016/j.gfs.2017.03.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Funari E, Manganelli M, Buratti FM, Testai E. Cyanobacteria blooms in water: Italian guidelines to assess and manage the risk associated to bathing and recreational activities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 598:867-880. [PMID: 28458204 DOI: 10.1016/j.scitotenv.2017.03.232] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 03/23/2017] [Accepted: 03/25/2017] [Indexed: 06/07/2023]
Abstract
Cyanobacteria thrive in many aquatic environments, where they can produce cyanotoxins with different toxicological profile. Anthropic pressure and climate changes are causing the expansion in terms of time and space of their blooms, increasing the concerns for human health in several exposure scenarios. Here the update of the Italian guidelines for the management of cyanobacterial blooms in bathing water is presented. A risk-based approach has been developed according to the current scientific knowledge on cyanobacteria distribution in the Italian Lakes and on chemical, toxicological and epidemiological aspects of different cyanotoxins, summarized in the first part of the paper. Oral, dermal and inhalation exposure to cyanotoxins, during recreational activities, are individually examined, to develop a framework of thresholds and actions aimed at preventing harmful effects for bathers. Guidelines, also by comparing international guidance values and/or guidelines, provide criteria to plan environmental monitoring activities, health surveillance and public communication systems. Finally the still important scientific gaps and research needs are highlighted.
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Affiliation(s)
- Enzo Funari
- Istituto Superiore di Sanità, Dept. of Environment and Health, Viale Regina Elena 299, 00161 Rome, Italy.
| | - Maura Manganelli
- Istituto Superiore di Sanità, Dept. of Environment and Health, Viale Regina Elena 299, 00161 Rome, Italy.
| | - Franca M Buratti
- Istituto Superiore di Sanità, Dept. of Environment and Health, Viale Regina Elena 299, 00161 Rome, Italy.
| | - Emanuela Testai
- Istituto Superiore di Sanità, Dept. of Environment and Health, Viale Regina Elena 299, 00161 Rome, Italy.
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Zervou SK, Christophoridis C, Kaloudis T, Triantis TM, Hiskia A. New SPE-LC-MS/MS method for simultaneous determination of multi-class cyanobacterial and algal toxins. JOURNAL OF HAZARDOUS MATERIALS 2017; 323:56-66. [PMID: 27453259 DOI: 10.1016/j.jhazmat.2016.07.020] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 07/04/2016] [Accepted: 07/07/2016] [Indexed: 05/26/2023]
Abstract
Cyanobacterial and algal toxins comprise a large group of harmful metabolites, belonging to different chemical classes, with a variety of chemical structures, physicochemical properties and toxic activities. In this study, a fast, simple and sensitive analytical method was developed for the simultaneous determination of multi-class cyanobacterial and algal toxins in water. The target compounds were: Cylindrospermopsin, Anatoxin-a, Nodularin, 12 Microcystins ([D-Asp3]MC-RR, MC-RR, MC-YR, MC-HtyR, [D-Asp3]MC-LR, MC-LR, MC-HilR, MC-WR, MC-LA, MC-LY, MC-LW and MC-LF), Okadaic acid and Domoic acid. Analytes were determined using liquid chromatography-tandem mass spectrometry (LC-MS/MS). A dual Solid Phase Extraction (SPE) cartridge assembly was applied for the extraction of target compounds from water. Optimized SPE parameters included cartridge material, initial sample pH, sequence of the cartridges in the SPE assembly as well as composition and volume of the elution solvent. The method was validated, providing acceptable mean recoveries and reproducibility for most analytes. Limits of detection were at the ngL-1 level. The method was successfully applied in real lake water samples from Greece, where a wide range of Microcystins were detected for the first time, at concentrations ranging from 0.034 to 63μgL-1.
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Affiliation(s)
- Sevasti-Kiriaki Zervou
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", Patriarchou Grigoriou & Neapoleos, 15341 Athens, Greece
| | - Christophoros Christophoridis
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", Patriarchou Grigoriou & Neapoleos, 15341 Athens, Greece
| | - Triantafyllos Kaloudis
- Water Quality Department, Athens Water Supply and Sewerage Company-EYDAP SA, Athens, Greece
| | - Theodoros M Triantis
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", Patriarchou Grigoriou & Neapoleos, 15341 Athens, Greece
| | - Anastasia Hiskia
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", Patriarchou Grigoriou & Neapoleos, 15341 Athens, Greece.
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Buratti FM, Manganelli M, Vichi S, Stefanelli M, Scardala S, Testai E, Funari E. Cyanotoxins: producing organisms, occurrence, toxicity, mechanism of action and human health toxicological risk evaluation. Arch Toxicol 2017; 91:1049-1130. [DOI: 10.1007/s00204-016-1913-6] [Citation(s) in RCA: 258] [Impact Index Per Article: 36.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 12/13/2016] [Indexed: 12/11/2022]
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Hardy FJ, Bouchard D, Burghdoff M, Hanowell R, LeDoux B, Preece E, Tuttle L, Williams G. Education and notification approaches for harmful algal blooms (HABs), Washington State, USA. HARMFUL ALGAE 2016; 60:70-80. [PMID: 28073564 DOI: 10.1016/j.hal.2016.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 10/20/2016] [Accepted: 10/21/2016] [Indexed: 06/06/2023]
Abstract
While numerous strategies have been used to educate and notify the public about potential hazards from exposure to Harmful Algal Blooms (HABs), at present there are no national guidelines or suggested outreach approaches. To raise public awareness and determine effective HAB outreach methods, two Washington State agencies and three counties in the Puget Sound region implemented several education and notification strategies. These approaches were rated for effectiveness by state and county public health and water quality professionals. At the state level, the most effective action was a three-tiered advisory posting protocol for notifying external users that was introduced to local health jurisdictions at workshops around the state. Supplemental permanent signage is recommended for lakes with blooms to overcome the time lag between HAB onset and testing/posting. The state also implements effective notification of toxicity test results through a web-based HAB database and listserv. Lake residents were best notified through electronic alerts including email and social media while mailers to lake residents were useful during initial HAB events and to gain subscribers to electronic alerts. Press releases were most valuable when used sparingly for severe blooms or for blooms in large lakes. Initial analyses of lake recreational use indicates these strategies encourage behavior change in lake users. Based on these findings, a general framework for HAB outreach and a specific notification strategy is proposed to assist other regions or agencies that are developing HAB education and notification programs.
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Affiliation(s)
- F Joan Hardy
- Washington State Department of Health, Olympia, WA 98504, United States.
| | - Debra Bouchard
- King County Department of Natural Resources, Seattle, WA 98104, United States
| | - Marisa Burghdoff
- Snohomish Surface Water Management, Everett, WA 98201, United States
| | - Ray Hanowell
- Tacoma-Pierce County Health Department, Tacoma, WA 98418, United States
| | - Beth LeDoux
- King County Department of Natural Resources, Seattle, WA 98104, United States
| | - Ellen Preece
- Robertson-Bryan, Inc., Elk Grove, CA 95624, United States
| | - Lindsay Tuttle
- Tacoma-Pierce County Health Department, Tacoma, WA 98418, United States
| | - Gene Williams
- Snohomish Surface Water Management, Everett, WA 98201, United States
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D'Anglada LV. Editorial on the special issue “harmful algal blooms (HABs) and public health: progress and current challenges”. Toxins (Basel) 2016; 7:4437-41. [PMID: 26837093 PMCID: PMC4663512 DOI: 10.3390/toxins7114437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Lesley V D'Anglada
- U.S. Environmental Protection Agency, Office of Science and Technology, Office of Water, 1200 Pennsylvania Ave., N.W., Washington, DC 20460, USA.
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Grattan LM, Boushey C, Tracy K, Trainer V, Roberts SM, Schluterman N, Morris JG. The association between razor clam consumption and memory in the CoASTAL Cohort. HARMFUL ALGAE 2016; 57:20-25. [PMID: 27746706 PMCID: PMC5061506 DOI: 10.1016/j.hal.2016.03.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This study represents a preliminary effort to examine the possible impacts of chronic, low level Domoic Acid (DA) exposure on memory in the CoASTAL cohort. Five hundred thirteen men and women representing three Native American Tribes were studied with standard measures of cognition and razor clam consumption (a known vector of DA exposure) over a four year period. In addition, a pilot metric of DA concentration exposure was used which took into consideration average DA concentration levels in source beaches as well as consumption. Based upon GEE analysis, controlling for age, sex, race, year, education level, tribe, and employment status, findings indicated that high razor clam consumers (15 or more per month) had isolated decrements on some measures of memory (p=.02 to .03), with other cognitive functions unaffected. The relatively lower memory scores were still within normal limits, thus not clinically significant. The pilot DA exposure metric had no association with any aspect of cognition or behavior. There is a possible association between long term, low level exposure to DA through heavy razor clam consumption and memory. The availability of a reliable biological marker for human exposure to DA is needed.
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Affiliation(s)
- Lynn M. Grattan
- Department of Neurology: Division of Neuropsychology, University of Maryland School of Medicine, 110 S. Paca St. 3 Floor, Baltimore, MD 21201
| | - Carol Boushey
- Cancer Center Department: Epidemiology Program, University of Hawaii Manoa, 701 Ilalo St. Rm 525, Honolulu, HI 96813
| | - Kate Tracy
- Department of Epidemiology, University of Maryland School of Medicine, 10 S. Pine Street MSTF 334F, Baltimore, MD 21201
| | - Vera Trainer
- Marine Biotoxins Program, NOAA Northwest Fisheries Science Center, 2725 Montlake Blvd. E., Seattle, WA 98112
| | - Sparkle M. Roberts
- Department of Neurology: Division of Neuropsychology, University of Maryland School of Medicine, 110 S. Paca St. 3 Floor, Baltimore, MD 21201
| | - Nicolas Schluterman
- Department of Epidemiology, University of Maryland School of Medicine, 10 S. Pine Street MSTF 334F, Baltimore, MD 21201
| | - J. Glenn Morris
- Department of Medicine, College of Medicine, Emerging Pathogens Institute, University of Florida, 2055 Mowry Road; Box 100009, Gainesville, FL 32610
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Loftin KA, Graham JL, Hilborn ED, Lehmann SC, Meyer MT, Dietze JE, Griffith CB. Cyanotoxins in inland lakes of the United States: Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007. HARMFUL ALGAE 2016; 56:77-90. [PMID: 28073498 DOI: 10.1016/j.hal.2016.04.001] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 03/31/2016] [Accepted: 04/05/2016] [Indexed: 05/03/2023]
Abstract
A large nation-wide survey of cyanotoxins (1161 lakes) in the United States (U.S.) was conducted during the EPA National Lakes Assessment 2007. Cyanotoxin data were compared with cyanobacteria abundance- and chlorophyll-based World Health Organization (WHO) thresholds and mouse toxicity data to evaluate potential recreational risks. Cylindrospermopsins, microcystins, and saxitoxins were detected (ELISA) in 4.0, 32, and 7.7% of samples with mean concentrations of 0.56, 3.0, and 0.061μg/L, respectively (detections only). Co-occurrence of the three cyanotoxin classes was rare (0.32%) when at least one toxin was detected. Cyanobacteria were present and dominant in 98 and 76% of samples, respectively. Potential anatoxin-, cylindrospermopsin-, microcystin-, and saxitoxin-producing cyanobacteria occurred in 81, 67, 95, and 79% of samples, respectively. Anatoxin-a and nodularin-R were detected (LC/MS/MS) in 15 and 3.7% samples (n=27). The WHO moderate and high risk thresholds for microcystins, cyanobacteria abundance, and total chlorophyll were exceeded in 1.1, 27, and 44% of samples, respectively. Complete agreement by all three WHO microcystin metrics occurred in 27% of samples. This suggests that WHO microcystin metrics based on total chlorophyll and cyanobacterial abundance can overestimate microcystin risk when compared to WHO microcystin thresholds. The lack of parity among the WHO thresholds was expected since chlorophyll is common amongst all phytoplankton and not all cyanobacteria produce microcystins.
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Affiliation(s)
- Keith A Loftin
- U.S. Geological Survey, Organic Geochemistry Research Laboratory, Kansas Water Science Center, Lawrence, KS 66049, USA.
| | - Jennifer L Graham
- U.S. Geological Survey, Kansas Water Science Center, Lawrence, KS 66049, USA.
| | - Elizabeth D Hilborn
- U.S. Environmental Protection Agency, Office of Research and Development, NHEERL, Chapel Hill, NC 27599, USA.
| | - Sarah C Lehmann
- U.S. Environmental Protection Agency, Office of Wetlands, Oceans, and Watersheds, Ariel Rios Bldg., 1200 Pennsylvania Ave., N.W., Mail Code 4503T, Washington, DC 20460, USA.
| | - Michael T Meyer
- U.S. Geological Survey, Organic Geochemistry Research Laboratory, Kansas Water Science Center, Lawrence, KS 66049, USA.
| | - Julie E Dietze
- U.S. Geological Survey, Organic Geochemistry Research Laboratory, Kansas Water Science Center, Lawrence, KS 66049, USA.
| | - Christopher B Griffith
- U.S. Geological Survey, Organic Geochemistry Research Laboratory, Kansas Water Science Center, Lawrence, KS 66049, USA.
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