P4pal-10 and neutrophil migration. Effect of P4pal-10 (5 μM) on migration of peripheral blood neutrophils toward thrombin (1 U/mL), interleukin-8 (IL-8; 100 ng/mL), interferon gamma–inducible protein-10 (IP-10; 10 ng/mL), stromal-derived factor 1 α (SDF-1α; 100 ng/mL), and sphingosine-1-phosphate (S1P; 100 nM). Data are expressed as values relative to non–P4pal-10–treated controls, which were set to 100% (mean ± SEM). ***P < .005.