Figure 4. IFNγ activates Erk1/2 in primary neurons but not in fibroblasts.
(A) and (B) Hippocampal neurons and fibroblasts (MEFs) explanted from mouse embryos were treated with IFNγ (100 U/ml). Cells were lysed at indicated times post treatment and subjected to Western blot for Erk1/2, phosphorylated Erk1/2 (Erk1/2-P), and GAPDH as a loading control. C. Western blots from A and B were quantified by densitometry using ImageJ software. Erk1/2 and p-Erk1/2 signal was normalized to GAPDH as a loading control. Statistical analysis was determined using two-way ANOVA (n = 3, p < 0.002).