Effects of C/EBPδ knockdown on LPS-induced production of cytokines and chemokines from alveolar macrophage cells. MH-S cells were transiently transfected with 40 nmol/L control siRNA or C/EBPδ siRNA. At 12 hours after transfection, the cells were incubated with 100 ng/mL LPS for 6 hours. Supernatants were harvested, and an ELISA was performed to determine the expressions of TNF-α (A), IL-6 (B), and MIP-2 (C). The data are expressed as mean ± SEM (n = 9 to 10). **P < 0.01, ***P < 0.001.