Temperature rise and its influence on the toxic effects caused by cyanotoxins in a neotropical catfish

Temperature rise and its influence on the toxic effects caused by cyanotoxins in a neotropical catfish

Potentially toxic cyanobacterial blooms (cyanoHABs) have become a problem in public water supply reservoirs. Temperature rise caused by climate change can increase the frequency and intensity of blooms, which may influence the cyanotoxins concentration in the environment. This study aimed to evaluat...

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Bibliographic Details
Published in:Environmental pollution (1987) Vol. 353; p. 124166
Main Authors: Vicentini, Maiara, Calado, Sabrina L.M., Pessati, Jacqueline B.K., Perussolo, Maiara C., Lirola, Juliana R., Marcondes, Fellip R., Nascimento, Natália do, Beghetto, Camila L., Vilar, Mauro C.P., Mela, Maritana, Coral, Lucila A.A., Magalhães, Valéria F., Prodocimo, Viviane, Cestari, Marta M., Silva de Assis, Helena C.
Format: Journal Article
Language:English
Published: England Elsevier Ltd 15-07-2024
Subjects:
Animals
Bacterial Toxins - toxicity
Catfishes - physiology
Climate Change
Cyanobacteria
Cyanobacteria Toxins
CyanoHABs
Female
Global warming
Male
Marine Toxins - toxicity
Microcystins - toxicity
Neurotoxins - toxicity
Rhamdia quelen
Saxitoxins
Temperature
Toxicity
CyanoHABs
Global warming
Toxicity
Rhamdia quelen
Saxitoxins
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Summary:Potentially toxic cyanobacterial blooms (cyanoHABs) have become a problem in public water supply reservoirs. Temperature rise caused by climate change can increase the frequency and intensity of blooms, which may influence the cyanotoxins concentration in the environment. This study aimed to evaluate the effect of the temperature on the responses of a Neotropical catfish exposed to a neurotoxin-rich cyanobacterial crude extract (Raphidiopsis raciborskii T3). Juveniles of Rhamdia quelen were exposed to four treatments, based on study data: control at 25 °C (C25), control at 30 °C (C30), crude extract equivalent to 105 cells.mL-l of R. raciborskii at 25 °C (CE25) and 30 °C (CE30). After 96 h of exposure, the fish were anesthetized and blood was taken. After euthanasia, the gill, posterior kidney, brain, muscle, liver and gonad were sampled for hematological, biochemical, genotoxic and histopathological biomarker analysis. Liver was sampled for proteomic analysis for identification of proteins related to energy production. Water samples were collected at the beginning and the end of the experiment for neurotoxins quantification. Different parameters in both males and females were altered at CE25, evidencing the effects of neurotoxins in freshwater fish. At CE30, a water warming scenario, more effects were observed in females than at 25 °C, such as activation of saxitoxin metabolism pathway and genotoxicity. More damage to macromolecules was observed in females at the higher temperature, demonstrating that the increase in temperature can aggravate the toxicity of neurotoxins produced by R. raciborskii T3. [Display omitted] •Raphidiopsis raciborskii T3 crude extract (CE) contains neoSTX and dcSTX.•Male and female fish differently respond to CE containing STXs.•STX detoxification system in females was activated with increasing temperature.•DNA damage was observed in females exposed to CE at a higher temperature.•Temperature aggravates CE effects in females.
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ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2024.124166