Immunohistochemical staining of plaque components in aortic plaques of balloon-injured rabbits.

<p>(A) Hematoxylin-and-eosin staining of abdominal aortic cross sections showing plaque area. α-actin staining for smooth muscle cells. RAM-11 staining for macrophages. Oil-red O staining for lipids. Sirius red staining for collagen. (B–E) Quantification of results in (A). (Bars = 20 µm). (F) Vulnerability index. *<i>P</i><0.05 vs. week 4; ^#<i>P</i><0.05 vs. week 6; ^$<i>P</i><0.05 vs. week 8; ^&<i>P</i><0.05 vs. week 10.