Enhanced activation of IRF3 and IRF7 in Lrba−/− cells stimulated with TLR3 or TLR9 ligands. (A) Immunoblot analysis of phosphorylated (p) or total IKKα/β, NF-κB p65, ERK1/2, and IκBα in Lrba+/+, Lrba+/−, and Lrba−/− BMDCs after stimulation with CpG-B. (B and C) Immunoblot analysis of (B) IRF7, NF-κB p65, and (C) IRF3 in nuclear and cytoplasmic fractions of lysates of Lrba+/+ and Lrba−/− BMpDCs after stimulation with (B) CpG-A and (C) poly(I:C). (D) Immunoblot analysis of phosphorylated (p) and total IRF3 in Lrba+/+, Lrba+/−, and Lrba−/− BMpDCs after stimulation with poly(I:C). Data are representative of three independent experiments.