Effects of various concentrations of plasminogen or inactivated plasmin on human monocyte migration triggered by Lp(a) (300 μg/mL). HBSS values show random cell migration in the absence of the chemoattractant Lp(a). *P < .05 and **P < .01 versus appropriate Lp(a) control. Cell numbers are expressed as mean ± SEM per high-power field of four independent experiments in each group.