GFAP level of AD (8.96 ± 7.80 ng/mL) significantly higher than all-controls (3.19 ± 1.39 ng/mL, p < 0.001) and age-matched senescent (3.99 ± 1.55 ng/mL, p < 0.005). The gene discussed is GFAP; the disease is Alzheimer disease.