CBLN1 and Alzheimer disease: They found that Cer (d18:1/23:0), Cer (t16:1/14:0), Cer (m18:1/20:0), Cer (m18:0/22:0), and Cer (d19:1/22:0) were deceased in patients with AD, whereas Cer (d18:0/16:0), Cer (d19:1/24:0), Cer (d18:0/23:0), and Cer (d18:2/25:0) were increased in patients with AD, which were positively correlated with AD.