Fig. 8. Difference between young and old mice on pro-inflammatory cytokines. Cytokines expression after MCAo: TNF-α (A), IL-6 (B) and IL-1b (C). Cytokines expression after TBI: TNF-α (D), IL-6 (E) and IL-1b (F). **p <0.01 vs sham young; ***p <0.001 vs sham young; ###p <0.001 vs sham old; ° p <0.05 vs TBI young.