Moreover, synaptic‐related proteins, such as neurogranin and synaptosomal‐associated protein 25,37, 38 mitochondrial function‐related Mitofusin‐1 and Mitofusin‐2,39 and glial cell‐specific TREM240 can also offer information for the diagnosis of AD. This evidence concerns the gene NRGN and Alzheimer disease.