Fig. 6.
Percentage of positive macrophage cells (associated with E. coli cells) after incubating with detached 5-h E. coli RP437/pBAD-mPlum cells. U937 cells were attached on 5:1, 20:1 or 40:1 PDMS surfaces for 90 min in RPMI medium supplemented with 10% FBS at 37°C and 5% CO2 on 5:1, 20:1 or 40:1 PDMS surfaces (r=0.92, p<0.0001, Pearson correlation analysis).