Figure 2.
Linezolid (LIN), vancomycin (VAN) and daptomycin (DAP) differentially modulate the expression of Toll-like receptors (TLRs) in monocytes. THP-1 monocytes were incubated with LIN, VAN or DAP in the presence or absence of lipopolysaccharide (LPS) for 24 h. Quantitative real-time-PCR (qRT-PCR) analysis was performed to determine the expression levels of genes encoding TLR1 (a), TLR2 (b), TLR4 (c), TLR6 (d), TLR7 (e) and TLR9 (f) after normalization to GAPDH. Each bar represents the fold change in mRNA expression comparing unstimulated control with antibiotic-incubated cells or LPS-stimulated control with LPS plus antibiotic-stimulated cells, respectively. Data are expressed as mean±s.e.m. of six independent experiments; *P<0.05 vs respective LPS-free control; +P<0.05 vs respective LPS control.