Cells were untreated or pre-treated for 30 minutes with p38 MAPK inhibitor SB203580 (SB), PI3K inhibitor LY294002 (LY), MEK inhibitor U0126 (U0) and/or 5 mM butyrate (NaB) for 24 hours. (A) U937 cells were analyzed for CCL2 and (B) CCL5 via ELISA. n = 5. Similarly, (C) HL-60 cells were analyzed for CCL2 and (D) CCL5 via ELISA. n = 5. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001.