AD	atopic dermatitis
aCDase	acid ceramidase
SM	sphingomyelin
SPC	sphingosylphosphorylcholine
PC	phosphorylcholine
SPH	sphingosine
IEF	isoelectric focusing
SC	stratum corneum
pCer	synthetic pseudo-ceramide
DTT	dithiothreitol
BGCase	β-glucocerebrosidase
aSMase	acid sphingomyelinase
LGs	lamellar granules
GCer	glucosylceramide
SPT	serine-palmitoyl transferase
SCD	stearoyl CoA desaturase
GCERS	GCer synthase
SMS	GCer synthase
GS	glucosylsphingosine
HCs	healthy controls