<p>Tissue sections from rat carotid arteries were further stained with hematoxylin-eosin to observe the thickness of neointimal layer of arterial wall (A–F). The expression levels of MMP-2 and PCNA proteins were detected with immunohistopathological analysis (H and I). The images were acquired by microscopy at 200-fold magnification. The manifestation of vessel restenosis was presented as the ratio of neointima- to-media area (N/M ratio). L, lumen; N, neointima layer; M, media layer. Red arrow is protein experssion.*<i>P</i><0.05, and **<i>P</i>< compared with BA + water group, respectively.</p
