Published: Jan. 1, 2024
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Language: Английский
Published: Jan. 1, 2024
Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI
Language: Английский
Environment & Health, Journal Year: 2024, Volume and Issue: 2(3), P. 114 - 125
Published: Feb. 7, 2024
The escalating frequency of thallium (Tl) contamination incidents amplifies its environmental risk. However, the potential risk Tl to aquatic organisms, especially across varying developmental stages, remains poorly understood. In this study, we employed zebrafish as a representative model organism and exposed embryos larvae at distinct periods (specifically, 6 h postfertilization (hpf) 72 hpf) low concentrations Tl(I) (0.25 0.50 mg/L). exposure was performed for short duration 24 h, followed by 96 depuration period. Our results revealed that exerted disparate biological effects on different stages. Embryos exhibited negligible uptake Tl(I), whereas showed significant accumulation struggled with rapid elimination. Notably, able permeate blood-brain barrier, thereby posing nervous system. Transcriptomic analysis indicated triggered toxicological pathways in larvae. It mainly interfered metabolic processes embryos, while larvae, it disrupted intracellular ion homeostasis, both consequently provoking neurotoxicity. This emphasizes multifaceted nature toxicity depends stages organism. study clearly shows bioeffects are intricately related stage zebrafish, offering valuable perspective pollutant assessment.
Language: Английский
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The western mosquitofish (Gambusia affinis (G. affinis)) is often the only fish that survives in various selenium-contaminated aquatic environments. However, mechanisms of its survival such environments remain seldom explored. In this study, acute toxicity selenomethionine (Se-Met) a variety species (four oviparous and four ovoviviparous species) was evaluated, followed by chronic effects Se-Met on G. zebrafish (Danio rerio (D. rerio)), focusing Se accumulation gonads offspring, reproductive biology, offspring development. Our results showed LC50-96h largest among eight fish, confirming elevated resistance to Se. Meanwhile, transcripts genes related selenoproteins sulfoproteins opposite responses between D. exposure, along with altered levels total but not fish. exposures gonads, gonadal development embryonic early larval development, efflux embryos larvae were apparently different rerio. Finally, differentially expressed (particularly antioxidant inflammation) mostly stimulated inhibited This study has demonstrated capacity metabolism physiology can help partially explain Se-contaminated ecosystems.
Language: Английский
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Language: Английский
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