AChE	acetylcholinesterase inhibitors
AD	Alzheimer’s disease
BACE1	beta-Secretase 1
BBB	blood–brain barrier
BDNF	brain-derived neurotrophic factor
DOPE	dioleylphosphatidylethanolamine
FDA	U.S. Food and Drug Administration
Lf	lactoferrin
MAOIs	monoamine oxidase inhibitors
MEM	memantine hydrochloride
MRI	magnetic resonance imaging
NMDA	N-methyl-d-aspartate
NPs	nanoparticles
PEG	polyethylene glycol
PLA	polylactide acid
PLGA	poly lactic-co-glycolic acid
RES	reticuloendothelial system
SARIs	serotonin antagonists and reuptake inhibitors
SLNs	solid lipid nanoparticles
SNRIs	serotonin and norepinephrine reuptake inhibitors
SPIONs	superparamagnetic iron oxide nanoparticles
SSRIs	selective serotonin reuptake inhibitors
TCAs	tricyclic antidepressants