Experiment 1 brain, peripheral, and plasma measures pertaining to Interleukin-6 (IL-6) and a gene expression marker of Nf-κB activity, Nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, alpha (IκBα). Gene expression is shown in the hippocampus, amygdala, and spleen for (A, D, G) IκBα and (B, E, H) IL-6, respectively. Additionally, IL-6 protein expression shown adjusted to total protein is also shown in these structures for IL-6 (C, F, I) as well as in (J) plasma. Letters indicate differences divulged by post hoc testing of a significant main effect of Group (groups that share a letter in common did not differ statistically, whereas differences between groups are indicated by letters that do not match).