Figure 1.
Altered JNK and p38 MAPK signaling in DUSP1−/− BMMs. (A) 106 DUSP1+/+ or DUSP1−/− BMMs were pretreated with vehicle or 100 nM Dex for 4 h and stimulated with LPS for the indicated times. Lysates were blotted for DUSP1 or tubulin-α (top) and total or phosphorylated MAPKs (bottom). Two exposures of the same DUSP1 Western blot are shown to illustrate differences in basal and LPS-induced DUSP1 protein expression. (B) DUSP1+/+ or DUSP1−/− BMMs were pretreated with 1 nM to 1 μM Dex for 4 h and stimulated with LPS for 4 h. In two separate representative experiments, lysates were sequentially blotted for DUSP1 and tubulin-α (top) or for phosphorylated and total MAPKs (bottom). (C) Wild-type and GRdim BMMs were pretreated with 1 nM to 1 μM Dex for 4 h and stimulated with LPS for 4 h. Lysates were blotted for DUSP1 or actin.