Two Tier 1 proteins, CRAT and TNFRSF6B, and five Tier 2 proteins, ERBB3, IL6R, MMP12, ICAM1, and IL1RL2, were linked to AD and three Tier 2 proteins, MANF, STAT6, and TNFSF8, to AR. This evidence concerns the gene IL1RL2 and Alzheimer disease.