No significant correlations were observed between gene expression and age in the three diagnostic groups (CAP2 CTRL: r = −0.4122; p = 0.3083; n = 8; CAP2 PD: r = −0.1219; p = 0.7579; n = 9; CAP2 AD: r = −0.2523; p = 0.5825; n = 7; DLG1 CTRL: r = 0.3758; p = 0.3579; n = 8; DLG1 PD: r = 0.2959; p = 0.4388; n = 9; DLG1 AD: r = −0.5611; p = 0.1610; n = 8; ADAM10 CTRL: r = −0.3152; p = 0.4417; n = 8; ADAM10 PD: r = −0.122; p = 0.7949; n = 8; ADAM10 AD: r = 0.1952; p = 0.6524; n = 8 Spearman correlation) (Figure 6a–i). The gene discussed is CAP2; the disease is Parkinson disease.