Western blot analysis of phospho-IKKβ (D; n = 6 WT + Veh; 6 WT + AβOs; 4 TNFR−/− + Veh; 6 TNFR−/− + AβOs) and IRS-1pSer636 levels (E; n = 6 WT + Veh; 5 WT + AβOs; 6 TNFR−/− + Veh; 5 TNFR−/− + AβOs) in the hypothalamus of wild-type (WT) or TNFR1−/− mice 10 days after i.c.v. injection of vehicle or AβOs. Representative images from Western blot experiments were always run on the same gels but represent noncontiguous lanes. In (D), *P = 0.0088, Student's t-test; in (E), *P = 0.0428, one-way ANOVA followed by Bonferroni post hoc test. 