Expression of (A,C) Siglec-5 in human THP-1 cells and (B,D) Siglec-11 in human HMC3 cells grown in monoculture and co-culture exposed to Dex and/or TMZ. Representative histograms were derived from flow cytometric analysis of 13,000 cells and show isotype control (light grey histogram), control cells (black line) Dex-treated cells (blue line), TMZ-treated cells (red line) and cells concomitantly treated with Dex/TMZ (green line). Data are presented as a median fluorescence intensity (MFI) from at least three independent experiments done in duplicate; * p < 0.05 vs. corresponding control group.