(A–B) BMDMs from wild type mice were treated with 100 ng/ml of LPS for the indicated times (A) or with the indicated concentrations of LPS for 4 hours (B). (C) BMDMs from wild type BMDMs were infected with viable E. coli or C. rodentium for 4 hours. (D) BMDMs from wild type, Ripk3−/−, and Ripk3−/−Casp8−/− mice were stimulated with either LPS (100 ng/ml), E. coli (MOI 1), or C. rodentium (MOI 1) for the indicated times. Lysates were subject to western blot analysis using CYLD (D1A10), RIPK3, CASPASE-8, and GAPDH antibodies. All experiments shown are representative of at least three independent experiments with similar results.