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Oral ingestion of polystyrene nanoplastics causes memory impairment and neuroinflammation by microglial uptake

ABSTRACT: Oral ingestion of polystyrene nanoplastics causes memory impairment and neuroinflammation by microglial uptake

PROVIDER: PRJNA1019235 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26116107_1.fastq.gz	Fastqsanger.gz
	SRR26116107_2.fastq.gz	Fastqsanger.gz
	SRR26116108_1.fastq.gz	Fastqsanger.gz
	SRR26116108_2.fastq.gz	Fastqsanger.gz
	SRR26116109_1.fastq.gz	Fastqsanger.gz

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Oral ingestion of polystyrene nanoplastics causes memory impairment and neuroinflammation by microglial uptake

Project description:Nanoplastics are produced by breakdown of plastics in environmental contamination or commercial use for cosmetics or daily expenses. Emerging evidence indicate that ingested nanoplastics with a size smaller than 100 nm have the potential to reach the brain and induces neurotoxicity. However, the potential toxicity of nanoplastics on brain are limited because of difficulties in synthesize of nanoplastics. In present study, we synthesized the fluorescent polystyrene nanoplastics (PSNPs) and examined the toxicity of PSNPs in brain in vivo and in vitro analyses by comparison to IR-813 fluorophore. Synthesized PSNPs were characterized by fluorescence imaging system, scanning electron microscopy, and Fourier-transform infrared spectroscopy. PSNPs were detected in adult mice brain by oral ingestion. In addition, a series of behavioral analyses showed that oral ingestion of PSNPs induced memory impairments. Among brain cells, PSNPs were predominantly internalized in microglia, and uptake of PSNPs induced microglial activation. In addition, the conditioned medium derived from microglia exposed to PSNPs repressed hippocampal neuronal activity. Furthermore, transcriptome analysis showed that PSNPs changed gene expressions in microglia, elevation of neuroinflammation in contrast to suppression of neurotrophic factors. These results indicated that predominant uptake of PSNPs in microglia induced elevation of neuroninflammatory responses whereas suppression of neurotrophic factors that may contribute to the cognitive impairment. Our findings indicate the toxic mechanism and potential detrimental effect of nanoplastic in brain and suggest a potential risk of cognitive impairment by exposure to nanoplastics.

2023-09-24 | GSE243612 | GEO

Protein corona formation on nanoplastics: polystyrene and PVC

Project description:In this study, the proteins forming the protein corona on PS and PVC were investigated after 5 min, 1 h, 6 h, or 24 h incubation of the nanoplastics with human plasma. TMT-based untargeted proteomics were applied to identify the proteins forming the protein corona.

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Short-term polystyrene nanoplastic exposure alters zebrafish male and female germline and reproductive outcomes, unveiling pollutant-impacted molecular pathways

Project description:Nanoplastics pollution is a rising environmental concern whose impacts on biodiversity and human health are far from being understood. This is particularly salient in aquatic ecosystems, where the majority of species depend on external fertilization for reproduction. Here we evaluated the effects of a short-term exposure to engineered polystyrene nanoplastics (NPs) in the zebrafish germ line to further explore their impact on reproduction. To this end, zebrafish (Danio rerio) were exposed to 5 mg/L of 45 nm polystyrene (PS)-NPs via water for 96h. We show that, in males, nanoplastics induced testicular histological alterations with abnormal sperm clustering and chromatin compaction, resulting in viable spermatozoa but with reduced motility. Moreover, in females we observed an alteration in oocyte stages frequencies during oogenesis, possibly reflecting alterations in oocyte growth. RNA-sequencing analysis in male testis links nanoplastic induced alterations in the expression of genes involved in chromatin structure, meiosis and DNA double-strand break formation and repair progression, and gametes recognition. Flow cytometry analysis revealed that the observed effects in males were directly due to nanoplastics penetrating the testicular barrier and being internalized within germline cells. Overall, our results demonstrate that acute exposure to NPs can compromise reproductive fitness, underscoring the environmental and health impacts of NPs pollution.

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Project description:Nanoplastics, as an emerging persistent pollutant of global concern in recent years, have posed a potential threat to human health. However, there is little known about the adverse effects of nanoplastics on the female reproductive system. Here, polystyrene nanoplastics (PS-NPs) with a diameter of 50 nm were selected as representative nanosized plastic particles to investigate the potential effects of subchronic exposure on placenta development in mice.

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Transcriptomic profiling reveals differential cellular response of copper oxide nanoparticles and polystyrene nanoplastics in perfused human placenta

Project description:Concerns about the potential risks to human health due nanoparticulate pollution have been emerging. However, the risks to sensitive populations, such as pregnant individuals and their unborn children are poorly characterised. With increasing evidence of environmental particles passing the placenta, their potential adverse effects of on pregnancy and fetal development need to be assessed. Here, we investigated the impact of copper oxide (CuO) and polystyrene (PS) nanoparticle exposure on gene expression in ex vivo perfused human placental tissue.

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Project description:The objective was to evaluate the impact of nanoplastics on various niches of the microbiome in a mouse model

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Transcriptomic profiling reveals differential cellular response of copper oxide nanoparticles and polystyrene nanoplastics in perfused human placenta

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Project description:Plastic particles in water environment can adsorb heavy metals, leading to combined toxicity to aquatic organisms. However, current conclusions are mostly obtained based on cell population-average responses. Heterogeneity effects among cell populations in aquatic organisms remain unclear. This study analyzed the heterogeneity effects of 200 μg/L 100 nm polystyrene nanoplastics (PS-NPs), 50 μg/L lead (Pb), and their combined exposures on zebrafish intestine cells by single-cell RNA sequencing.A total of 38640 cells in the zebrafish intestine was obtained and identified as seven cell populations, including enterocytes, macrophages, neutrophils, B cells, T cells, enteroendocrine cells, and goblet cells.Co-exposure of PS-NPs and Pb caused similar transcriptome profiles with PS-NPs exposure in macrophages, which changed immunological recognition processes. The Pb exposure influenced the macrophages by direct cytotoxicity. However, the Pb alone and combined exposures induced similar modes of action in the enterocytes, including the generation of oxidative stress and abnormal lipid metabolism.

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Differentially forms of nitrogen regulates the response of Microcystis aeruginosa to nanoplastics under environmentally relevant nitrogen concentration

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