SS MPs increase neutrophil adhesion. (A) SCD neutrophil adhesion level was normalized to the one observed in the AA MP group. Representative photomicrographs taken during the same experiment, in a well in which cells were incubated with a high dose of AA MPs (B) or SS MPs (C) (n = 8 per group) (original magnification ×400). Neutrophils are fluorescently labeled (green). Nuclei of ECs and of neutrophils were labeled using DAPI (data not shown). **P < .01 vs AA MPs, Mann-Whitney U test.