DYRK1A and Alzheimer disease: Furthermore, among the proteins involved in AD neuropathology, APP-C99 levels are positively associated with CamKIIα activation (r = 0.63, p = 0.03) while DYRK1A protein levels are positively associated with oxidative stress markers (HNE: r = 0.63, p = 0.02; 3-NT: r = 0.87, p < 0.001; PC: r = 0.64, p = 0.03), GluA1 S831 phosphorylation (S381/GluA1, r = 0.91, p < 0.001) and CamKIIα activation (r = −0.54, p = 0.04).