MSC	Mesenchymal Stem Cell
CNS	Central Nervous System
MS	Multiple Sclerosis
NGF	Nerve Growth Factor
BDNF	Brain-Derived Neurotrophic Factor
HGF	Hepatocyte Growth Factor
VEGF	Vascular Endothelial Growth Factor
OPC	Oligodendrocyte Precursor Cell
BM	Bone Marrow
SHED	Stem cells from Human Exfoliated Deciduous teeth
PD-1	Programmed Death-1
PD-L1	Programmed Death-Ligand 1
RRMS	Relapsing-Remitting Multiple Sclerosis
PPMS	Primary Progressive Multiple Sclerosis
SPMS	Secondary Progressive Multiple Sclerosis
EPC	Endothelial Progenitor Cell
MSC-NP	MSC-derived Neural Progenitor
EGF	Epidermal Growth Factor
bFGF	basic Fibroblast Growth Factor
TNT	Tunneling Nanotube
EV	Extracellular Vesicle
ROS	Reactive Oxygen Species