Cells were pretreated with small interfering RNA (siRNA) of TLR2 for 24 hr, and then treated with 500 ng/ml P2C, P3C (F) or heat-killed S. aureus (HK-SA) (multiplicity of infection [MOI] = 10) (G) (n=6 biologically independent samples). This evidence concerns the gene TLR2 and infection.