Among the plasma pathological markers of AD, Aβ42 peptide showed positive correlation with HNE (r = 0.423; P < 0.01) and MDA (r = 0.423; P < 0.01) whereas negative correlation was observed for total tau with HNE (r = −0.370; P < 0.01) and MDA (r = −0.291; P < 0.01) (Figure 3). The gene discussed is MAPT; the disease is Alzheimer disease.