Effects of acute RU486 treatment on lower doses of LPS (0.1 and 0.5 mg/kg)-induced changes in serum TNFα (a), corticosterone (b), and ACTH (c), and on high dose LPS (20 mg/kg)-induced changes in serum TNFα (d), corticosterone (e), and ACTH (f) in C57BL/6 DIO mice. RU486 was oral gavaged 30 minutes prior to ip LPS. LPS exposure time was 90 minutes. * p < 0.05 vs no-LPS. ** p < 0.01 vs no-LPS. + p < 0.05 vs no-RU486.