A histological study of FABP3 expression in tissues obtained from patients with synucleinopathies, patients with AD, and healthy people showed the presence of FABP3 expression in brain tissues and its colocalization with α-synuclein aggregates in the brains of the people with synucleinopathies, but not with amyloid aggregates, β, or p-tau in the brains of those with AD [162]. This evidence concerns the gene FABP3 and Alzheimer disease.