We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
From exposure to neurotoxicity induced by micro-nanoplastics with brain accumulation and cognitive decline
AI summary Read the abstract
This review synthesizes evidence that micro- and nanoplastics can reach the brain by crossing the blood-brain barrier or traveling along nerve pathways, accumulating in regions critical for memory and thinking. Animal studies show that chronic exposure leads to cognitive problems, behavioral changes, and brain changes resembling neurodegenerative diseases, driven by oxidative stress, inflammation, and disruption of the gut-brain connection. The findings raise concern that long-term human exposure to nanoplastics through food and air could contribute to cognitive decline and neurological disease.
The pervasive presence of micro-nanoplastics (MNPs) in the human environment has raised concerns regarding their potential implications for neurological health. Once regarded as biologically inert, MNPs are now recognised as capable of penetrating the blood-brain barrier (BBB) or entering the central nervous system (CNS) through sensory neuronal pathways. Recent studies have demonstrated that MNPs can accumulate in key brain regions, such as the hippocampus and prefrontal cortex, which are critical for memory, emotion, and executive function. Animal experiments have revealed that chronic exposure to MNPs may result in cognitive deficits, behavioral disturbances, and pathological features resembling neurodegenerative diseases. The mechanisms underlying these adverse effects are likely multifaceted, involving oxidative stress, persistent neuroinflammation, synaptic dysfunction, and disturbances of the gut-brain axis. In addition to their direct neuronal effects, MNPs may also impair cerebrovascular health by promoting endothelial dysfunction, vascular calcification, and small vessel injury, further increasing the risk of cognitive decline and stroke. This review synthesizes current evidence from environmental exposure to neural accumulation, providing mechanistic insights into MNPs-induced neurotoxicity. The review also highlights critical knowledge gaps and emphasizes the urgent need for further research and public health interventions to address this emerging environmental threat.
More Papers Like This
Neurotoxicities induced by micro/nanoplastics: A review focusing on the risks of neurological diseases
AI summary Read the abstract
This review summarizes evidence that micro- and nanoplastics can reach the brain through the bloodstream and nerve pathways, where they trigger oxidative stress, inflammation, and cell damage that may contribute to neurodegenerative diseases. The particles are found in air, water, soil, and food, meaning humans are constantly exposed through breathing, eating, and skin contact, making brain effects a serious long-term concern.
Deciphering the Neurotoxic Burden of Micro- and Nanoplastics: From Multi-model Experimental Evidence to Therapeutic Innovation
AI summary Read the abstract
This review summarizes research on how micro- and nanoplastics damage the brain and nervous system, covering evidence from cell studies, animal experiments, and clinical observations. Plastic particles can cross the blood-brain barrier, disrupt the gut-brain connection, cause oxidative stress, and trigger inflammation that leads to memory problems and cognitive decline. The review also discusses potential treatment strategies, making it a useful resource for understanding the brain health risks of plastic exposure.
Insights into the toxic effects of micro-nano-plastics on the human brain and their relationship with the onset of neurological diseases: A narrative review.
AI summary Read the abstract
This review examined toxic effects of micro and nano-plastics (MNPs) on the human brain, linking MNP exposure to neuroinflammation, oxidative stress, disruption of the blood-brain barrier, and progression toward neurodegenerative diseases. The authors synthesized evidence from cell studies, animal models, and emerging human data.
A systematic review of the potential neurotoxicity of micro-and nanoplastics: the known and unknown
AI summary Read the abstract
This critical review of 234 studies found that micro- and nanoplastics can reach the brain via olfactory translocation or by crossing the blood-brain barrier, where they may cause neuroinflammation, oxidative damage, and behavioral changes in animal models. The evidence raises significant concerns about potential neurotoxic effects of chronic microplastic exposure in humans, though major knowledge gaps remain.
Micro- and Nanoplastics in the Human Brain: Mechanistic Plausibility, Translational Challenges, and Links to Neurological Disease Trends.
AI summary Read the abstract
Researchers synthesized evidence that micro- and nanoplastics can accumulate in human brain tissue via multiple barrier-crossing routes and, once there, disrupt synaptic function, mitochondrial homeostasis, and neuroinflammatory pathways relevant to Alzheimer's, Parkinson's, stroke, and mood disorders — while emphasizing that longitudinal epidemiological evidence linking plastic exposure to neurological disease remains limited.
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.