Evaluation of Inflammatory and Calcification after Implantation of Bioabsorbable Poly-L-Lactic Acid/Amorphous Calcium Phosphate Scaffolds in Porcine Coronary Arteries

Figure 4

Immunohistochemistry staining of ALP, positive cells with the PLLA scaffold (a–d) and with the PLLA/ACP scaffold (e–h). Note the significantly lower expression of MMP-9 in the PLLA/ACP stented artery (e–h) compared with that of the PLLA stented artery (a–d) (×400).