PGP and dementia: We also investigated the dementia/no dementia fold-changes in key BBB transporters of Aβ, such as the low-density lipoprotein receptor-related protein-1 (LRP-1, Uniprot ID LRP1) [67–69], P-glycoprotein (P-gp, Uniprot ID MDR1) [70, 71], and receptor for advanced glycation end products (Uniprot ID RAGE) [72], and the transporter of glucose (GLUT1, Uniprot ID GTR1) [73, 74].