Pathways, Mechanisms, and Therapeutic Strategies of Neurotoxicity Induced by Micro- and Nanoplastics

Plastic pollution now represents a global environmental crisis, as micro- and nanoplastics (MNPs) infiltrate organisms via multiple routes such as the digestive system and respiratory system, ultimately accumulating in tissues and endangering human health. The central nervous system exhibits particular vulnerability to MNPs toxicity, which can trigger neurotoxic effects and disrupt brain function, potentially contributing to neurological disorders. Understanding the precise mechanisms and biological pathways underlying MNP-induced neurotoxicity has therefore emerged as a critical step toward identifying therapeutic targets. This review synthesizes current knowledge on MNPs' entry routes into the brain, examines proposed neurotoxic mechanisms, and evaluates existing and prospective treatment approaches. These insights may inform both the risk assessment of MNPs exposure and the development of targeted interventions for neurological protection.