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Alzheimer's disease (AD) is a chronic neurodegenerative disorder characterized by loss of memory and cognitive impairment. The pathogenesis of AD is complex and involves a variety of processes, including receptor-ligand interaction and receptor-mediated endocytosis. Biofunctionalized metallic nanoparticles (MNPs) represent a cutting-edge technique that addresses significant limitations of existing therapies by precisely delivering therapeutic molecules to disease-specific locations. The review explores innovative therapeutic strategies for Alzheimer's disease (AD), focusing on the roles of amyloid precursor protein and metal nanoparticles. It discusses drug delivery systems, including functionalized metallic nanoparticles, highlighting their potential in enhancing drug efficacy and targeting amyloid plaques. These biofunctionalized MNPs not only help pass the blood-brain barrier (BBB), but also lessen off-target effects and increase medication absorption. Furthermore, they facilitate emerging treatments, such as monoclonal antibodies, aptamers, CRISPR/Cas9 gene therapy, and proteolysis-targeting chimeras (PROTACs), showcasing their mechanisms and benefits in mitigating AD pathology. This paper focuses on MNPs’ ability to control neuroinflammation, a hallmark of AD pathogenesis, and their novel function in improving therapy results. By integrating current findings and addressing limitations in clinical translation, this review sheds light on the future of MNPs-assisted AD treatment.
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