CBLN1 and Alzheimer disease: In addition, the larger species of ceramides containing non-hydroxy fatty acids and sphingosines (Cer[NS]); ceramides containing non-hydroxy fatty acids and dihydrosphingosines (Cer[NDS]), Cer[NH], Cer[AS]; and ceramides containing a-hydroxy fatty acids and 6-hydroxysphingosines (Cer[AH]) in AD subjects tended to be expressed at lower levels, whereas the smaller species of Cer[NS], Cer[NDS] and Cer[AS] tended to be expressed at higher levels than in healthy individuals.