Consumption of toxic benthic cyanobacteria by two common demersal fish : Growth, antioxidant and liver histopathology responses
Copyright © 2024 Elsevier Ltd. All rights reserved..
Benthic freshwater cyanobacteria have the potential to produce toxins. Compared with more extensively studied plankton species, little is known about the impact of harmful benthic cyanobacteria on aquatic organisms. As demersal fish are usually in direct contact with benthic cyanobacteria, it is important to understand their interactive effects. This study investigated the physio-chemical responses of two demersal fish (Xenocypris davidi and Crucian carp) after exposure to benthic Oscillatoria (producing cylindrospermopsin, 2 × 106 cells/mL) for 7 days. Interestingly, benthic Oscillatoria had less adverse effects on X. davidi than C. carp. The two demersal fish effectively ingested Oscillatoria, but Oscillatoria cell sheathes could not be fully digested in C. carp intestines and led to growth inhibition. Oscillatoria consumption induced oxidative stress and triggered alterations in detoxification enzyme activities in the X. davidi liver. Superoxide dismutase (SOD) and glutathione reductase (GR) activities significantly increased in the C. carp liver, but catalase (CAT) and detoxification enzymes glutathione S-transferase (GST) and glutathione (GSH) activities were insignificantly changed. This suggested that C. carp may have a relatively weak detoxification capacity for toxic Oscillatoria. Oscillatoria ingestion led to more pronounced liver pathological changes in C. carp, including swelling, deformation, and loss of cytoskeleton structure. Simultaneously, fish consumption of Oscillatoria increased extracellular cylindrospermopsin concentration. These results provide valuable insights into the ecological risks associated with benthic cyanobacteria in aquatic ecosystems.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:242 |
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| Enthalten in: |
Toxicon : official journal of the International Society on Toxinology - 242(2024) vom: 06. Apr., Seite 107703 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Li, Hongmin [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 24.04.2024 Date Revised 24.04.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.toxicon.2024.107703 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Benthic freshwater cyanobacteria have the potential to produce toxins. Compared with more extensively studied plankton species, little is known about the impact of harmful benthic cyanobacteria on aquatic organisms. As demersal fish are usually in direct contact with benthic cyanobacteria, it is important to understand their interactive effects. This study investigated the physio-chemical responses of two demersal fish (Xenocypris davidi and Crucian carp) after exposure to benthic Oscillatoria (producing cylindrospermopsin, 2 × 106 cells/mL) for 7 days. Interestingly, benthic Oscillatoria had less adverse effects on X. davidi than C. carp. The two demersal fish effectively ingested Oscillatoria, but Oscillatoria cell sheathes could not be fully digested in C. carp intestines and led to growth inhibition. Oscillatoria consumption induced oxidative stress and triggered alterations in detoxification enzyme activities in the X. davidi liver. Superoxide dismutase (SOD) and glutathione reductase (GR) activities significantly increased in the C. carp liver, but catalase (CAT) and detoxification enzymes glutathione S-transferase (GST) and glutathione (GSH) activities were insignificantly changed. This suggested that C. carp may have a relatively weak detoxification capacity for toxic Oscillatoria. Oscillatoria ingestion led to more pronounced liver pathological changes in C. carp, including swelling, deformation, and loss of cytoskeleton structure. Simultaneously, fish consumption of Oscillatoria increased extracellular cylindrospermopsin concentration. These results provide valuable insights into the ecological risks associated with benthic cyanobacteria in aquatic ecosystems | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Crucian carp | |
| 650 | 4 | |a Cylindrospermopsin | |
| 650 | 4 | |a Physiological response | |
| 650 | 4 | |a Toxic benthic cyanobacteria | |
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| 650 | 7 | |a Marine Toxins |2 NLM | |
| 700 | 1 | |a Yuan, Yuan |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Huiting |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Xinyue |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Wenxia |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Yanfeng |e verfasserin |4 aut | |
| 700 | 1 | |a Kan, Changlin |e verfasserin |4 aut | |
| 700 | 1 | |a Zhufu, Hengji |e verfasserin |4 aut | |
| 700 | 1 | |a Gong, Chen |e verfasserin |4 aut | |
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