Whole blood actions of aspirin-triggered LXA₄analog (15-R/S-methyl-LXA₄) on cell surface expression of L-selectin and CD18 by human neutrophils. Whole blood was incubated with 15-R/S-methyl-LXA₄ (5 μmol/L) for 10 minutes at 37°C. In each histogram is also displayed the negative control of immunostaining with class-matched irrelevant antibodies (C). Shown is a representative experiment of 5 experiments.