Abstract: A process is provided of delivering at least one active agent cargo molecule into an neuronal cell whereby a cargo molecule is placed within a synthetic vesicle such as a liposome and a biotinylated protein such as an antibody is bound to the synthetic vesicle to form a protein bound synthetic vesicle whereby the protein recognizes a receptor expressed on the surface of a neuronal cell, and exposing the protein bound synthetic vesicle to the cell until the cargo molecule is delivered into the neuronal cell. Numerous cargo molecules are delivered by the inventive synthetic vesicle including a calpain inhibitor and a caspase inhibitor. The protein illustratively targets a cellular receptor for a ligand such as glutamate, glycine, dopamine, nicotine, muscarine, acetylcholine, or serotonin, and the like.