BCG-induced MKP-1 expression is dependent on p38 MAPK and ERK1/2. Human monocytes were pretreated with several inhibitors including PD98059 (20 μM), SB203580 (100 nM), SP600125 (100 nM), and CAPE (5 μg/ml) for 1 hour. BCG (MOI = 1 CFU/cell) was then added for 1 hour and RNA was harvested. Levels of MKP-1 were measured by QPCR. Percentage change was defined as the percentage of the fold induction of (BCG + inhibitor) over the fold induction of BCG without the inhibitor. Sample of BCG was set as 100% for comparisons. Independent experiments were performed on blood cells from 4 different donors and the results are shown as mean ± SD. * = p < 0.05.