Transforming anti-Alzheimer's therapy by targeting endogenous receptorrial system through ligand-conjugated nanoformulations.

Alzheimer's Disease (AD) is the most prevalent neurodegenerative disorder, contributing to the majority of dementia cases in the elderly globally. Characterized by progressive cognitive decline, AD is associated with complex neuropathological changes, including the accumulation of amyloid-beta (Aβ) plaques and tau tangles, synaptic loss, and neuroinflammation. One of the significant challenges in treating AD is the blood-brain barrier (BBB), which prevents many therapeutic agents from reaching the brain. Despite advancements in understanding AD's pathology, limited treatment options are available, largely due to the inability of conventional drugs to effectively target the brain. Ligand-conjugated nanoparticles (NPs) are promising for targeted drug delivery to the brain. These NPs, engineered with ligands that can bind to specific receptors or transporters on the BBB, facilitate the crossing of the barrier via receptor-mediated endocytosis or adsorptive-mediated transcytosis. This strategy enhances therapeutic agents' bioavailability and cellular uptake, offering a potential solution to overcome current limitations in AD treatment. Using nanotechnology to design ligand-conjugated NPs for targeted and sustained drug delivery could significantly improve therapeutic outcomes for AD patients by addressing key pathological processes in the brain.