ABC	ATP-binding cassette
AcOH	Acetic acid
AD	Alzheimer’s disease
BCSFB	Blood–cerebrospinal fluid barrier
cDNA	Complementary DNA
CE	Complexation efficiency
CNS	Central nervous system
CoG	Center of gravity
CP	Choroid plexus
CS	Chitosan
CSF	Cerebrospinal fluid
CTR	Negative control
CTR+	Positive control
CV	Coefficients of variation
DMEM-F12	Dulbecco’s Modified Eagle Medium/Nutrient Mixture F-12
DNPZ	Donepezil
FBS	Fetal bovine serum
GAPDH	Glyceraldehyde-3-phosphate dehydrogenase
HIBCPP	Immortalized human epithelial CP cells
KRB	Krebs–Ringer buffer
LLOQ	Limit of quantification
LOD	Limit of detection
MESOR	Midline estimating statistic of rhythm
MTT	3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
MW	Molecular weight
NPs	Nanoparticles
PDI	Polydispersity index
qPCR	Quantitative real-time PCR
RE	Relative error
SEM	Standard error of the mean
SLC	Solute carrier
TPP	Tripolyphosphate