FOS and systemic lupus erythematosus: LPS increased c-Fos neuronal expression in both SLE and control mice compared their vehicle-treated counterparts (39.2 ± 5.5 vs. 17.0 ± 3.2 cells/field, p = 0.007 for SLE; 42.3 ± 7.8 vs. 18.2 ± 1.9 cells/field, p = 0.004 for controls) (Figure 3C), and by the same magnitude (39.2 ± 5.5 vs. 42.3 ± 7.8 cells/field, p = 0.672).