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Aim  Rasagiline mesylate (N‐propargyl‐1 (R)‐aminoindan) (RG) is a selective, potent irreversible inhibitor of monoamine oxidase‐B with cardioprotective and anti‐apoptotic properties. We investigated whether it could be cardioprotective in a rat model undergoing experimental myocardial infarction (MI) by permanent ligation of the left anterior descending coronary artery.    Methods and results  RG was administered, intraperitoneally, for 28 days (2 mg/kg) starting 24 h after MI induction. Echocardiography analysis revealed a significant reduction in left ventricular end‐systolic and diastolic dimensions and preserved fractional shortening in RG‐treated compared with normal saline group at 28 days post‐MI (31.6 ± 2.3 vs. 19.6 ± 1.8,  P  < 0.0001), respectively. Treatment with RG prevented tissue fibrosis as indicated by interstitial collagen estimation by immunofluorescence staining and hydroxyproline content and attenuated the number of apoptotic myocytes in the border zone (65%) as indicated by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay. Caspase 3 relative protein levels were significantly decreased in the non‐infarcted myocardium. Markedly decreased malondialdehyde levels in the border zone indicate a reduction in tissue oxidative stress.    Conclusions  Our study demonstrates a positive effect of RG in the post‐MI period with a significant attenuation in cardiac remodelling.

The neuroprotective agent Rasagiline mesylate attenuates cardiac remodeling after experimental myocardial infarction