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Deciphering the toxic effects of polystyrene nanoparticles on erythropoiesis at single-cell resolution
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Researchers used single-cell RNA sequencing in zebrafish embryos to show that polystyrene nanoparticle exposure disrupts blood cell development by impairing erythrocyte differentiation and heme synthesis, resulting in fewer mature red blood cells and raising concerns about aquatic ecosystem health.
Polystyrene nanoparticles pose significant toxicological risks to aquatic ecosystems, yet their impact on zebrafish ( Danio rerio) embryonic development, particularly erythropoiesis, remains underexplored. This study used single-cell RNA sequencing to comprehensively evaluate the effects of polystyrene nanoparticle exposure on erythropoiesis in zebrafish embryos. In vivo validation experiments corroborated the transcriptomic findings, revealing that polystyrene nanoparticle exposure disrupted erythrocyte differentiation, as evidenced by the decrease in mature erythrocytes and concomitant increase in immature erythrocytes. Additionally, impaired heme synthesis further contributed to the diminished erythrocyte population. These findings underscore the toxic effects of polystyrene nanoparticles on hematopoietic processes, highlighting their potential to compromise organismal health in aquatic environments.
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Single-Cell RNA Sequencing Reveals Size-Dependent Effects of Polystyrene Microplastics on Immune and Secretory Cell Populations from Zebrafish Intestines
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Researchers used single-cell RNA sequencing to examine how different sizes of polystyrene microplastics affect intestinal cell populations in zebrafish. The study revealed size-dependent effects on immune and secretory cell populations, providing a detailed transcriptomic view of how microplastics disrupt intestinal function at the individual cell level and alter the interplay between intestinal cells and gut microbiota.
Single‐Cell Transcriptomic Analysis Reveals Hair Cell‐Specific Molecular Responses to Polystyrene Nanoplastics in a Zebrafish Embryo Model
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Researchers exposed zebrafish embryos to polystyrene nanoplastics at environmentally relevant concentrations and used single-cell RNA sequencing to identify hair cell-specific transcriptional changes in the inner ear, finding molecular-level effects without overt developmental phenotypes.
Single-cell transcriptomic analysis reveals heterogeneity of the patterns of responsive genes and cell communications in liver cell populations of zebrafish exposed to polystyrene nanoplastics
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Researchers used single-cell gene analysis to examine how polystyrene nanoplastics affect different cell types in zebrafish livers. They discovered that various liver cell populations responded to nanoplastic exposure in distinctly different ways, with some cell types showing more disruption to fat metabolism and stress response genes than others. The study reveals that nanoplastic toxicity in the liver is not uniform and that certain cell populations may be more vulnerable than previously understood.
Heterogeneity effects of nanoplastics and lead on zebrafish intestinal cells identified by single-cell sequencing
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Researchers used single-cell RNA sequencing to examine how polystyrene nanoplastics and lead individually and together affect different cell types in zebrafish intestines. They found that nanoplastics primarily affected macrophages while lead mostly impacted enterocytes, and the combined exposure showed synergistic effects specifically in goblet cells. The study reveals that population-average toxicity measurements can mask important cell-type-specific responses to environmental contaminants.
Polystyrene Nanoplastic Exposure Induces Developmental Toxicity by Activating the Oxidative Stress Response and Base Excision Repair Pathway in Zebrafish (Danio rerio)
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Researchers exposed zebrafish embryos to polystyrene nanoplastics at various concentrations and found significant developmental abnormalities including reduced hatching rates and increased malformations. The nanoplastics activated oxidative stress responses and DNA repair pathways, indicating cellular damage during critical early development stages. The study provides mechanistic evidence for how nanoplastic exposure can disrupt normal embryonic development in aquatic organisms.
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