| PD | Parkinson’s disease |
| SN | substantia nigra |
| MPTP | 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine |
| UGCG | ceramide glucosyltransferase |
| CERS1 | ceramide synthase 1 |
| CERS3 | ceramide synthase 3 |
| CERS5 | ceramide synthase 5 |
| ASAH1 | acid ceramidase |
| ASAH2 | neutral ceramidase |
| GBA1 | glucocerebrosidase |
| SMPD1 | sphingomyelin phosphodiesterase 1 (acid sphingomyelinase) |
| SMPD2 | sphingomyelin phosphodiesterase 2 (neutral sphingomyelinase) |