Fig. 1.

U937 cell–atherosclerotic plaque adhesion assay, performed as described in Section 2. The endothelium is stained with an anti-von Willebrand factor antibody. (A) Uninhibited adhesion with control mouse immunoglobulin 20 μg/ml. U937 cells are adhering to the surface of the endothelium (arrows), and to the cut face of the intima. (B) U937 adhesion is inhibited by the same concentration of mouse anti-GROα antibody. Representative example of 12 experiments, original magnification 630×.