AAV	Adeno-associated Virus
AD	Alzheimer’s Disease
Ang-1	Angiopoietin 1
BBB	Blood–Brain Barrier
BCSFB	Blood–Cerebrospinal Fluid Barrier
BDNF	Brain-derived Neurotrophic Factor
BME	Brain Microvessel Endothelium
BMSCs	Bone Marrow Mesenchymal Stem Cells
cGMPs	current Good Manufacturing Practices
CNS	Central Nervous System
CSF	Cerebrospinal Fluid
CuSNPs	Copper Sulfide Nanoparticles
DOX	Doxorubicin
FDA	Food and Drug Administration (FDA)
FGF2	Fibroblast Growth Factor 2
GBM	Glioblastoma Multiforme
GDNF	Glial-cell-derived Neurotrophic Factor
GI	Gastrointestinal Tract
HD	Huntington’s Disease
HGF	Hepatocyte Growth Factor
hNSCs	Human Neural Stem Cells
IC	Intracranial
IN	Intranasal
LINCL	Late-infantile Neuronal Ceroid Lipofuscinosis
LPS	Lipopolysaccharide
MCAO	Middle-Cerebral-Artery-Occlusion
MPS	Mononuclear Phagocyte System
MSCs	Mesenchymal Stromal Cells
NHP	Non-human Primates
NT3	Neurotrophin-3
OPC	Oligodendrocyte Precursor Cell
PBS	Phosphate-buffered Saline
PD	Parkinson’s Disease
PDGF	Platelet-derived Growth Factor
PEG	Polyethylene Glycol
qRT-PCR	Real-time Polymerase Chain Reaction
RES	Reticuloendothelial system
RIF	Rifampin
RVG	Rabies Viral Glycoprotein
SAH	Subarachnoid Hemorrhage
SC	Subcutaneous
SCI	Spinal Cord Injury
SPION	Superparamagnetic Iron Oxide Nanoparticle
TBI	Traumatic Brain Injury
TFF	Tangential Flow Filtration
TfR	Transferrin Receptor
TGF	Transforming Growth Factor
TME	Tumor-microenvironment
TMZ	Temozolomide
TPP1	Tripeptidyl Peptidase-1
Tregs	Regulatory T cells
VEGF	Vascular Endothelial Growth Factor