marginally significantP = .081
Effects of Aging on Brain Expression Levels of Selected Marker Proteins Results of ELISA analysis revealed a marginally significant increase of proinflammatory IL-1β protein level in the STR of AU but not of AI animals compared to the young control group ( n = 5/group; F(2, 12) = 3.127, P = .081; AU vs young: 1.5 ± 0.1 pg/μg vs 1.1 ± 0.1 pg/μg, P = .032; AI vs young: 1.4 ± 0.1 pg/μg vs 1.1 ± 0.1 pg/μg, P = .110) ( Figure 5B ).