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Impact of Chlorella vulgaris Bioremediation and Selenium on Genotoxicity, Nephrotoxicity and Oxidative/Antioxidant Imbalance Induced by Polystyrene Nanoplastics in African Catfish (Clarias gariepinus)
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Researchers found that polystyrene nanoplastics caused DNA damage, kidney injury, and oxidative stress in African catfish. The study suggests that treatment with the green algae Chlorella vulgaris and the mineral selenium helped reduce these harmful effects, pointing to potential protective strategies against nanoplastic toxicity in aquaculture.
Contamination of the environment with nano- and microplastic particles exerts a threatened impact on the aquatic ecosystems and sustainable catfish aquaculture. The presence of nanoplastics has been found to have a detrimental impact on both aquatic and terrestrial ecosystems. The present study examines the effect of polystyrene nanoplastics on DNA, erythrocytes, oxidative status and renal of catfish in addition to the potential protective effects of Chlorella vulgaris bioremeditation and selenium to hinder this effect. Six equal groups of fish were used as follows: Group 1: served as a control group and received water free from PS NPs; Group 2: was exposed to PS NPs at a concentration of 5mg/L; Group 3: was exposed to PS NPs (5mg/L) + selenium (1mg/kg diet); Group 4: was exposed to PS NPs (5mg/L) + C. vulgaris (25g/kg diet); Group 5: was supplemented with C. vulgaris (25g/kg diet); and Group 6: was supplemented with selenium (1mg/kg diet). The results indicated that PS NPs induced oxidative stress by significantly elevating MDA activities and slightly reducing antioxidant biomarkers, resulting in DNA damage, increased frequency of micronuclei, erythrocyte alterations, and numerous histopathological alterations in kidney tissue. Selenium and C. vulgaris significantly ameliorated the oxidative/antioxidant status, reduced DNA damage, micronucleus frequency, erythrocyte alterations, and morphology of kidney tissue. Nevertheless, further research is needed to evaluate in detail the mechanism behind the toxicity with nano-microplatics in aquatic system.
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Impact of Chlorella vulgaris Bioremediation and Selenium on Genotoxicity, Nephrotoxicity and Oxidative/Antioxidant Imbalance Induced by Polystyrene Nanoplastics in African Catfish (Clarias gariepinus)
AI summary Read the abstract
Researchers exposed African catfish to polystyrene nanoplastics and found the particles caused DNA damage, kidney tissue changes, and oxidative stress. Supplementing the fish diet with the algae Chlorella vulgaris or the mineral selenium significantly reduced these harmful effects. The study suggests that certain natural supplements may help protect aquatic organisms from nanoplastic-related damage.
Natural Antioxidants can Improve Microplastics-Induced Male Reproductive Impairment in the African Catfish (Clarias Gariepinus)
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Researchers found that natural antioxidants including lycopene, citric acid, and Chlorella can protect against microplastic-induced reproductive damage in male African catfish, offering potential dietary strategies to mitigate microplastic toxicity in aquaculture.
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Researchers tested whether dietary natural antioxidants could protect African catfish from tissue damage caused by microplastic ingestion. Fish fed microplastics alone showed significant kidney, liver, and intestinal damage including cellular necrosis and tissue fibrosis, while fish receiving lycopene, citric acid, or chlorella alongside the microplastics showed substantially reduced tissue injury. The study suggests that natural antioxidant supplementation may help mitigate the harmful effects of microplastic exposure in aquaculture species.
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Researchers tested whether nano-selenium supplements could protect grass carp from damage caused by polystyrene microplastics. They found that nano-selenium reduced the tissue damage, oxidative stress, and immune suppression caused by microplastic exposure, and helped restore healthy gut bacteria. The study suggests that dietary nano-selenium may be a practical strategy for protecting farmed fish from the harmful effects of microplastic pollution in aquatic environments.
Bioremediation of hemotoxic and oxidative stress induced by polyethylene microplastic in Clarias gariepinus using lycopene, citric acid, and chlorella
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Researchers found that lycopene, citric acid, and chlorella provided protective bioremediation against polyethylene microplastic toxicity in African catfish, reducing hemotoxicity, oxidative stress, and tissue accumulation of MPs in the first study of phytobioremediation against MP toxicity in fish.
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