TNF and systemic lupus erythematosus: LPS-challenged SLE mice had higher 51 kDa brain TNF-α expression (5.1 × 106 ± 2.8 × 106 vs. 6.4 × 105 ± 2.4 × 105 intensity units, p = 0.044 for 51 kDa), but not 26 kDa (6.6 × 106 ± 3.9 × 106 vs. 1.2 × 106 ± 6.1 × 105 intensity units, p = 0.083 for 26 kDa), compared to their vehicle-treated counterparts.