Selected Abbreviations:
AC3	Adenylate cyclase type III
BBB	Blood–brain barrier
BEC	Brain endothelial cell
CNS	Central nervous system
EC	Endothelial cell
GFP	Green fluorescent protein
HR-SEM	High-resolution scanning electron microscopy
HR-TEM	High-resolution transmission electron microscopy
NT	Nanotubule
NV	Nanovesicle
TENT	Tethering nanotubule
TJ	Tight junction
TUNT	Tunneling nanotubule