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Li J, Xian X, Xiao X, Li S, Yu X. Dynamic characteristics of total and microcystin-producing Microcystis in a large deep reservoir. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 335:122256. [PMID: 37506805 DOI: 10.1016/j.envpol.2023.122256] [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: 03/14/2023] [Revised: 07/19/2023] [Accepted: 07/24/2023] [Indexed: 07/30/2023]
Abstract
Microcystis, one of the common cyanobacteria, often causes blooms in reservoirs, which has seriously threatened the safety of drinking water worldwide. To identify the growth characteristic of total and microcystin-producing Microcystis in large deep reservoirs, we used Quantitative PCR (qPCR) to measure the cell density of total and microcystin-producing Microcystis and monitored water quality in the water samples collected in Dongzhang Reservoir once a month. Microcystis blooms occurred in Dongzhang Reservoir in April 2017, which was composed of microcystin-producing and non-microcystin-producing Microcystis. Water temperature, dissolved oxygen, pH, and chlorophyll-a showed significant vertical stratification during Microcystis blooms. Total and microcystin-producing Microcystis grew rapidly under the high concentration of total phosphorus and rising water temperatures. Nitrate-nitrogen had a significant linear correlation with the abundance of microcystin-producing Microcystis. Our results indicated that nutrients and water temperature could be key triggers of Microcystis blooms and nitrate-nitrogen potentially regulates the competition between microcystin-producing and non-microcystin-producing Microcystis. This study improves our understanding of the characteristics of Microcystis blooms and the competition between microcystin-producing and non-microcystin-producing Microcystis in large deep reservoirs.
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Affiliation(s)
- Jingjing Li
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
| | - Xuanxuan Xian
- College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China
| | - Xinyan Xiao
- College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China
| | - Shuai Li
- Fujian Provincial Investigation, Design & Research Institute of Water Conservancy & Hydropower, No.158 Dongda Road, Gulou District, Fuzhou, 350001, China
| | - Xin Yu
- College of the Environment & Ecology, Xiamen University, Xiamen, 361102, China
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da Silva RDC, Grötzner SR, Moura Costa DD, Garcia JRE, Muelbert J, de Magalhães VF, Filipak Neto F, de Oliveira Ribeiro CA. Comparative bioaccumulation and effects of purified and cellular extract of cylindrospermopsin to freshwater fish Hoplias malabaricus. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2018; 81:620-632. [PMID: 29764335 DOI: 10.1080/15287394.2018.1469101] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 04/19/2018] [Accepted: 04/22/2018] [Indexed: 06/08/2023]
Abstract
Many tropical freshwater ecosystems are impacted by cyanobacteria blooms increasing the risk of cyanotoxins exposure to aquatic organisms while human populations may be exposed by eating fish, drinking water, or dermal swimming. However, few toxicological data are available on the influence of cyanobacteria blooms in particular, cylindrospermopsin (CYN) on Brazilian neotropical fish. A number of studies demonstrated the ability of CYN to bioaccumulate in freshwater organisms and consequently enter the human food chain. The aim of the current study was to examine the effects of CYN following single intraperitoneal injection (50 µg/kg) of purified CYN (CYNp) or aqueous extract of CYN-producing cyanobacteria extract (CYNex) after 7 or 14 days. Biomarkers such as histopathology (liver), oxidative stress (liver and brain), and acetylcholinesterase (AChE) activity (muscle and brain) were utilized in order to assess the influence of CYN on Hoplias malabaricus. In terms of AChE activity, administration of CYNex and CYNp both muscle and brains were used as target tissues. In brain an increase of glutathione S-transferase (GST) activity and lipid peroxidation (LPO) levels was noted suggesting an imbalance in redox cycling. The majority of biomarkers did not present significant alterations in liver, but an elevation in superoxide dismutase (SOD) and glucose 6 phosphate dehydrogenase (G6PDH) activities was found. Different profiles of GST activity were observed in both studied groups (CYNex and CYNp) while LPO (CYNex and CYNp) and protein carbonylation (PCO) (CYNp) levels increased after exposure to CYN. The incidence of necrosis, melanomacrophages centers, and free melanomacrophages were detected as evidence of cell death and immune responses. Nonprotein thiols (NPT) levels were not markedly affected in both exposed groups. Data demonstrated that in vivo exposure to CYN produced biochemical and morphological disturbances in liver and brain of H. malabaricus.
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Affiliation(s)
- Rodrigo de Cássio da Silva
- a Departamento de Biologia Estrutural, Molecular e Genética , Universidade Estadual de Ponta Grossa , Ponta Grossa , Brasil
| | - Sonia Regina Grötzner
- b Departamento de Biologia Celular , Universidade Federal do Paraná, Cx , Curitiba , Brasil
| | | | | | - Juan Muelbert
- c Estação de Piscicultura Panamá , Paulo Lopes , Brazil
| | - Valéria Freitas de Magalhães
- d Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Bloco G, Ilha do Fundão , Universidade Federal do Rio de Janeiro , Rio de Janeiro , Brazil
| | - Francisco Filipak Neto
- b Departamento de Biologia Celular , Universidade Federal do Paraná, Cx , Curitiba , Brasil
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Silva RC, Liebel S, de Oliveira HHP, Ramsdorf WA, Garcia JRE, Azevedo SMFO, Magalhães VF, Oliveira Ribeiro CA, Filipak Neto F. Cylindrospermopsin effects on cell viability and redox milieu of Neotropical fish Hoplias malabaricus hepatocytes. FISH PHYSIOLOGY AND BIOCHEMISTRY 2017; 43:1237-1244. [PMID: 28389904 DOI: 10.1007/s10695-017-0367-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 03/17/2017] [Indexed: 06/07/2023]
Abstract
Cylindrospermopsin (CYN) is a cyanotoxin that is cytotoxic to a wide variety of cells, particularly to the hepatocytes. In this study, the toxic effects of purified CYN were investigated in primary cultured hepatocytes of Neotropical fish Hoplias malabaricus. After isolation, attachment, and recovery for 72 h, the cells were exposed for 72 h to 0, 0.1, 1.0, 10, and 100 μg l-1 of CYN. Then, cell viability and a set of oxidative stress biomarker responses were determined. Catalase, superoxide dismutase, glucose-6-phosphate dehydrogenase, and glutathione S-transferase activities were not affected by exposure to CYN. Concentration-dependent decrease of glutathione reductase activity occurred for most CYN-exposed groups, whereas non-protein thiol content increased only for the highest CYN concentration. Lipid peroxidation, protein carbonylation, and DNA damage levels were not altered, but reactive oxygen species levels increased in the cells exposed to the highest concentration of CYN. Cell viability decreased in all the groups exposed to CYN. Thus, CYN may cause a slight change in redox balance, but it is not the main cause of cell death in H. malabaricus hepatocytes.
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Affiliation(s)
- R C Silva
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Bloco G, Ilha do Fundão, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21949-900, Brazil
- Departamento de Biologia Estrutural, Molecular e Genética. Bloco M. Setor de Ciências Biológicas e da Saúde, Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brazil, CEP 84030-900
| | - S Liebel
- Departamento de Biologia Celular, Universidade Federal do Paraná, Cx. Postal 19031, Curitiba, PR, 81531-990, Brazil
| | - H H P de Oliveira
- Departamento de Biologia Celular, Universidade Federal do Paraná, Cx. Postal 19031, Curitiba, PR, 81531-990, Brazil
| | - W A Ramsdorf
- Departamento de Genética, Universidade Federal do Paraná, Caixa Postal 19031, Curitiba, PR, 81531-990, Brazil
| | - J R E Garcia
- Campus Laranjeiras do Sul, Universidade Federal da Fronteira Sul, Laranjeiras do Sul, PR, 85303-775, Brazil
| | - S M F O Azevedo
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Bloco G, Ilha do Fundão, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21949-900, Brazil
| | - V F Magalhães
- Instituto de Biofísica Carlos Chagas Filho, Centro de Ciências da Saúde, Bloco G, Ilha do Fundão, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21949-900, Brazil.
| | - C A Oliveira Ribeiro
- Departamento de Biologia Celular, Universidade Federal do Paraná, Cx. Postal 19031, Curitiba, PR, 81531-990, Brazil.
| | - F Filipak Neto
- Departamento de Biologia Celular, Universidade Federal do Paraná, Cx. Postal 19031, Curitiba, PR, 81531-990, Brazil
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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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