Rapid evaluation of the toxicity of metals using fish embryo acute toxicity is facilitative to ecological risk assessment of aquatic organisms. However, this approach has seldom been utilized for the comparative study on the effects of different metals to fish. In this study, acute and sub-chronic tests were used to compare the toxicity of Se(IV) and Cd in the embryos and larvae of Japanese medaka (Oryzias latipes). The embryos with different levels of dechorionation and/or pre-exposure were also exposed to Se(IV) and Cd at various concentrations. The results showed that the LC-144 h of Cd was 1.3-5.2 folds higher than that of Se(IV) for the embryos. In contrast, LC-96 h of Se(IV) were 200-400 folds higher than that of Cd for the larvae. Meanwhile, dechorionated embryos were more sensitive to both Se and Cd than the intact embryos. At elevated concentrations, both Se and Cd caused mortality and deformity in the embryos and larvae. In addition, pre-exposure to Cd at the embryonic stages enhanced the resistance to Cd in the larvae. However, pre-exposure to Se(IV) at the embryonic stages did not affect the toxicity of Se(IV) to the larvae. This study has distinguished the nuance differences in effects between Se(IV) and Cd after acute and sub-chronic exposures with/without chorion. The approach might have a potential in the comparative toxicology of metals (or other pollutants) and in the assessment of their risks to aquatic ecosystems.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1007/s10646-024-02762-y | DOI Listing |
Environ Pollut
December 2024
Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China. Electronic address:
The potential health risks of microplastics (MPs) and their combined exposure with heavy metals such as mercury (Hg) in aquatic environment are increasingly concerned recently. In this work, zebrafish embryos were exposed to different levels of polystyrene microplastics (PS-MPs, ∼0.1 μm) coupled with Hg(II) or/and MeHg at 20 μg/L, to investigate the tissue biodistribution and accumulation of PS-MPs and Hg species, and their interaction, as well as embryo toxicity, oxidative stress and metabolic profiles.
View Article and Find Full Text PDFCurr Biol
December 2024
Department of Molecular & Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA; Department of Integrative Biology, University of California, Berkeley, Berkeley, CA 94720, USA; Essig Museum of Entomology, University of California, Berkeley, Berkeley, CA 94720, USA. Electronic address:
Metazoan parasites have played a major role in shaping innate immunity in animals. Insect hosts and parasitoid wasps are excellent models for illuminating how animal innate immune systems have evolved to neutralize these enemies. One such strategy relies on symbioses between insects and intracellular bacteria that express phage-encoded toxins.
View Article and Find Full Text PDFEur J Hum Genet
December 2024
Institute of Human Genetics, University of Bonn, School of Medicine & University Hospital Bonn, Bonn, Germany.
Orofacial clefting (OFC) is a frequent congenital anomaly and can occur either in the context of underlying syndromes or in isolation (nonsyndromic). The two common OFC phenotypes are cleft lip with/without cleft palate (CL/P) and cleft palate only (CPO). In this study, we searched for penetrant CL/P genes, by evaluating de novo copy number variants (CNV) from an exome sequencing dataset of 50 nonsyndromic patient-parent trios.
View Article and Find Full Text PDFComp Biochem Physiol C Toxicol Pharmacol
December 2024
Department of Pathology, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China. Electronic address:
Zearalenone (ZEA), a common mycotoxin, poses significant environmental and health risks. While its toxicological effects are well-studied, its impact on regeneration remains unclear. This study explored ZEA's effects on zebrafish (Danio rerio) larvae, focusing on developmental toxicity, immunotoxicity, and tissue regeneration.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
Shanxi Key Laboratory of Coal-based Emerging Pollutant Identification and Risk Control, Research Center of Environment and Health, College of Environment and Resource, Shanxi University, Taiyuan, Shanxi 030006, PR China; Department of Resources and Environmental Engineering, Shanxi Institute of Energy, Taiyuan, Shanxi 030600, PR China.
Oxygenated polycyclic aromatic hydrocarbons (OPAHs) are a class of emerging environmental contaminants that exhibit high toxicity compared to parent PAHs. In addition to carcinogenic, teratogenic and mutagenic effects, recent studies show their potential to cause endocrine disruption, but the reports are controversial. In this study, we employed hormone receptors (ERα/AR/GRα/TRβ)-mediated dual luciferase reporter gene assay and molecular docking, and found that five typical OPAHs exhibited agonistic activity towards hormone receptors, and hydrogen bonding and hydrophobic interactions were the primary binding forces involved in OPAHs-receptor interactions.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!