We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Exposure to nanoplastics exacerbates light pollution hazards to mammalian
AI summary Read the abstract
Researchers discovered that nanoplastics can enter the brain's master clock region, called the suprachiasmatic nucleus, and disrupt circadian rhythms in mice. When nanoplastic exposure was combined with artificial light pollution, the disruption to sleep-wake cycles, metabolism, and immune function was significantly worse than from either stressor alone. The study is the first to show that nanoplastics can amplify the harmful effects of light pollution on mammalian health.
Environmental light pollution adversely affects brain function, disturbing circadian rhythms and negatively impacting human health. Nanoplastics (NPs) pollution is pervasive in the human environment, and their minuscule size facilitates entry into the body, particularly invading brain and compromising its functionality. However, whether NPs infiltrate rhythm-regulated brain regions and disrupt circadian rhythms in organisms remains unclear. Our study demonstrates that exposure to NPs in mice perturbs normal circadian rhythms. Specifically, NPs invade the suprachiasmatic nucleus (SCN), affecting the circadian clock genes network and altering the regular oscillations of core clock genes. Exposure to NPs renders the intrinsic rhythms more susceptible to disruption by light pollution, resulting in more pronounced disorder to metabolism, immune regulation, and brain function. This work is the first to investigate the combined effects of ambient light pollution and NPs pollution on mammalian health, and our findings suggest that NPs amplify the health impacts of light pollution. These findings also highlight that efforts to mitigate human health risks from environmental pollutants should begin to consider the synergistic effects of various classes of pollutants.
More Papers Like This
Nanoplastics exposure exacerbates Aβ plaque deposition in Alzheimer’s disease mice by inducing microglia pyroptosis
AI summary Read the abstract
In Alzheimer's disease model mice, exposure to environmentally relevant doses of nanoplastics worsened cognitive problems and increased the brain plaques associated with the disease. The nanoplastics damaged a waste-clearing system in brain immune cells called microglia, reducing their ability to remove harmful amyloid plaques, though the study also found that melatonin treatment helped restore brain cell function and reduce plaque buildup.
Nanoplastics exposure disrupts circadian rhythm associated with dysfunction of the endolysosomal pathway and autophagy in Caenorhabditis elegans
AI summary Read the abstract
Researchers found that exposure to polystyrene nanoplastics disrupted circadian rhythms in the model organism Caenorhabditis elegans, linking the disruption to dysfunction in endolysosomal pathways and autophagy. The study suggests that nanoplastic exposure may interfere with fundamental biological timing mechanisms through stress-related cellular pathways, raising concerns about the broader biological effects of nanoplastic pollution.
The gut-brain axis involved in polystyrene nanoplastics-induced neurotoxicity via reprogramming the circadian rhythm-related pathways
AI summary Read the abstract
Researchers found that polystyrene nanoplastics given orally to mice crossed the blood-brain barrier and caused neuronal damage in the hippocampus, the brain region responsible for learning and memory. The nanoplastics disrupted the gut-brain connection by altering gut bacteria and circadian rhythm pathways, leading to measurable declines in learning and memory ability. This study provides a biological mechanism showing how ingested plastic nanoparticles could contribute to brain-related health problems in humans.
The synergic toxicity of temperature increases and nanopolystrene on zebrafish brain implies that global warming may worsen the current risk based on plastic debris
AI summary Read the abstract
Researchers combined a 1°C water temperature increase with polystyrene nanoplastic exposure in zebrafish and found synergistic disruption of circadian rhythms, brain metabolomics, and behavior — with Raman spectroscopy confirming nanoplastic accumulation in brain tissue — suggesting that global warming may substantially amplify the neurological risks of plastic nanoparticle pollution.
Long-term polystyrene nanoparticles exposure reduces electroretinal responses and exacerbates retinal degeneration induced by light exposure
AI summary Read the abstract
Researchers found that three months of polystyrene nanoplastic exposure in mice caused particles to penetrate the blood-retinal barrier, accumulate in retinal tissue, generate oxidative stress, and reduce light-sensitivity responses — and that prior nanoplastic exposure significantly worsened light-induced photoreceptor degeneration, with a transcriptomic profile resembling age-related macular degeneration.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.