Actb	β-Actin
AU	Arbitrary units
BS	Brain stem
CE	Cerebellum
Cer	Ceramides
CTL	Cytotoxic T lymphocytes
DC	Dihydro ceramides
FC	Frontal cortex
FTY720	Fingolimod
Gapdh	Glyceraldehyde-3-phosphate dehydrogenase
HC	Hippocampus
HPTLC	High-performance thin-layer chromatography
HPβCD	2-hydroxypropyl-β-cyclodextrin
iPSC	Induced pluripotent stem cell
LC	Lactosylceramides
LPA	Lysophosphatidic acid
LPC	Lysophosphatidylcholine
MC	Monohexosyl ceramides
MDC	Monohexosyl dihydroceramides
NDCs	Neuronal differentiated cells
NPC1	Niemann–Pick type C1
NPCs	Neural progenitor cells
P	Postnatal
p	Passage
PC	Parieto-occipital cortex
PCR	Polymerase chain reaction
Ppia	Peptidylprolyl isomerase A
qRT-PCR	Quantitative real-time polymerase chain reaction
Rf	Retention factor
S1P	Sphingosine-1-phosphate
S1pr	Sphingosine-1-phosphate receptor
SM	Sphingomyelin
Sph	Sphingosine