ABC	ATP binding cassette
ABP	albumin binding proteins (ABPs)
AD	Alzheimer’s disease
AFM	atomic force microscopy
AMF	alternating magnetic field
AMT	adsorptive-mediated transcytosis
AQP4	aquaporin 4
ATP	adenosine triphosphate
BBB	blood–brain barrier
BCRP	breast cancer resistance protein
BDNF	brain-derived neurotrophic factor
CFTR	cystic fibrosis transmembrane conductance regulator
CLSM	confocal laser scanning microscopy
CNS	central nervous system
CPP	cell penetrating peptide
CSF	cerebrospinal-fluid
CX43	connexin 43
DGL-PEG	Dendrigraft-Poly L-lysine-Polyethylene glycol
DHED	10β,17β-Dihydroxyestra-1,4-dien-3-one
DOX	doxorubicin
DTR	diphtheria toxin receptor
ECM	extracellular matrix
ECS	extracellular space
FCS	fluorescence correlation spectroscopy
FSS	fluid shear stress
GIT	gastrointestinal fluid
GOF	gain of function
IL	interleukin
iNOS	inducible nitric oxide synthase
ISF	interstitial fluid
IV	intravenous
LATs	large neutral amino acid transporters
LDL	lipoprotein
LIF	leukemia inhibitory factor
LOF	loss of function
LRP1	low-density receptor-related protein
MFS	major facilitator superfamily
MMP	matrix metalloproteinase
MPO	myeloperoxidase
MRP	multidrug resistance protein
MSN	mesoporous silica nanoparticles
MTC	monocarboxylic acid transporters
NBDs	nucleotide-binding domains
NO	nitric oxide
NP	nanoparticle
NSCs	Neural stem cells
NTA	nanoparticle tracking analysis
OAT	organic anion transporters
OATPs	organic anion transporting polypeptide transporters
OATs	organic anion transporters
OCT	organic cation transporters
OCTs	organic cation transporters
PAA	polyacrylic acid
PAMAM	polyamidoamine
PDPA	poly(2-diisopropyl methacrylate)
PEG	polyethylene glycol
P-gp	P-glycoprotein
PLA	polylactic acid
PLGA	poly (D, L-lactide-co-glycolide)
PNP	polymeric nanoparticle
PT	proximal tubule
PTX	paclitaxel
PVS	perivascular space
RABV	rabies virus
RES	reticuloendothelial system
RMT	receptor-mediated transcytosis
SIT	saturable influx transport
SLC	solute carrier
SLCO	solute carrier organic anion
SLNP	solid lipid nanoparticles
SOCS3	suppressor of cytokine signaling 3
SPIONs	superparamagnetic iron oxide nanoparticles
SPR	surface plasmon resonance detection
SURs	sulfonylurea receptors
TBI	traumatic brain injury
TEM	transmission electron microscopy
TfR	transferrin receptor
TGF	transforming growth factor
TJ	tight junctions
TNF-α	tumor necrosis factor-α