EGR1 and infection: Next, we investigated the effect of EGR1 and c-FOS on the phagocytosis, the RNA levels of phagocytic receptors mannose receptor (MR) and scavenger receptor (SR) were determined in THP-1 macrophage cells after silencing EGR1 and c-FOS for 24 h, and followed by PA infection for 1 h.