G1 posttreatment of platelet monolayers. After 10 minutes of neutrophil-platelet interaction, the anti–P-selectin antibody (G1; 2 μg/mL) was administered, and neutrophil rolling (A) and neutrophil adhesion (B) were assessed. *P < .05 relative to time 0 value. (•) Untreated neutrophils; (□) G1 posttreated neutrophils.