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Microplastic Neurotoxicity in the Prefrontal Cortex: A Review of Mechanisms and Neuropsychiatric Associations
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Researchers synthesize current evidence on how microplastics accumulate in the brain and impair prefrontal cortex function through structural neural network damage, neurotransmitter disruption, and neuroinflammation, proposing mechanistic links to cognitive deficits, emotional dysregulation, and neuropsychiatric conditions.
The escalating crisis of plastic pollution has positioned microplastics (MPs) as globally pervasive environmental contaminants, with a documented presence across aquatic, terrestrial, and atmospheric ecosystems, as well as within biological organisms. A growing body of evidence suggests that MPs not only threaten ecological integrity but may also induce multifaceted neurotoxic effects in humans, particularly targeting the functional architecture of the prefrontal cortex (PFC). As the central regulator of cognition, emotional processing, and behavioral control, PFC dysfunction has been hypothesized to be associated with cognitive deficits, emotional dysregulation, and behavioral abnormalities. In this comprehensive review, we synthesize the current understanding of MP-mediated neurotoxicity through three interconnected pathways: (1) structural and functional impairment of PFC neural networks, (2) disruption of neurotransmitter homeostasis, and (3) potential associations with neuropsychiatric pathogenesis. By integrating these mechanistic insights, this work aims to provide a scientific foundation for risk assessment frameworks and evidence-based environmental health policies.
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This review examines how microplastics enter the human body and cross the blood-brain barrier, linking their presence in neural tissue to neurobehavioral disorders through mechanisms including neuroinflammation, oxidative stress, and disruption of neurotransmitter systems.
Micro- and Nanoplastics in the Human Brain: Mechanistic Plausibility, Translational Challenges, and Links to Neurological Disease Trends.
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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.
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This review examines the growing evidence that microplastics can cross biological barriers, accumulate in brain tissue, and affect neurological function. Researchers found that microplastic exposure has been linked to neurotoxicity, oxidative stress, and inflammation in the brain, with potential implications for neurotransmitter systems and cognitive function. The study calls for comprehensive regulatory measures to limit microplastic pollution and further research into the long-term neurological health effects.
Deciphering the Neurotoxic Burden of Micro- and Nanoplastics: From Multi-model Experimental Evidence to Therapeutic Innovation
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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.
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This review examines the emerging evidence linking microplastic exposure to mental health outcomes, discussing proposed mechanisms including neuroinflammation, gut-brain axis disruption, and endocrine interference from plastic-associated chemicals. The authors call for dedicated human cohort studies to establish whether environmental microplastic levels contribute to psychiatric or cognitive conditions.
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