Inhibitory profiles of captopril on matrix metalloproteinase-9 activity

To investigate the inhibitory profiles of angiotensin-converting enzyme (ACE) inhibitors on matrix metalloproteinase-9 (MMP-9) activity, the inhibitory activity and molecular interaction of captopril on human MMP-9 were studied. Plasma MMP-9 and ACE activities in samples from patient with acute myocardial infarction were similarly inhibited by captopril. Molecular models showed that captopril directly bound to the MMP-9 active center. Compared with the other ACE inhibitors, the compact structure of captopril seemed to make the inhibitory profiles on the MMP-9 active site.