Time-course of ischemia-reperfusion in a pig model

We have performed an unbiased, open-search analysis of the oxidative PTMs and quantitative multiplexed proteomics that take place in the pig ischemic heart tissue during the first 24h after I/R. We used 40 castrated male Large-White pigs weighing 30 to 40 kg. Closed-chest 40 min I/R was performed in 36 animals and they were sacrificed at 20 min, 40 min, 80 minutes, 2 hours, 6 hours, 12 hours and 24 hours after reperfusion after reperfusion (n = 4 per group). 4 animals were sacrificed with no intervention other than baseline cardiac magnetic resonance ( CMR), and served as controls. A new group of 4 animals were sacrificed at 120 minutes after artery occlusion without reperfusion, and other group of 4 animals were subjected to ischemic preconditioning prior to I/R and sacrificed at 24h. Myocardial tissue samples from ischemic area were collected for proteomics analysis.