Cell Adhesion Molecules/metabolism; Mesenchymal Stem Cell Transplantation/methods; Mesenchymal Stem Cells/metabolism; Myocardial Ischemia/metabolism; Myocardial Ischemia/surgery; Reactive Oxygen Species/metabolism; Acetylcysteine/pharmacology; Animals; Cell Adhesion/drug effects; Cell Adhesion/physiology; Cell Adhesion Molecules/drug effects; Cell Differentiation/physiology; Cell Proliferation; Cells, Cultured; Disease Models, Animal; Focal Adhesion Kinase 1/drug effects; Focal Adhesion Kinase 1/metabolism; Focal Adhesions/drug effects; Focal Adhesions/metabolism; Free Radical Scavengers/pharmacology; Gene Knock-In Techniques; Graft Survival/physiology; Hydrogen Peroxide/pharmacology; Integrins/drug effects; Integrins/metabolism; Male; Myocardial Ischemia/physiopathology; Oxidants/pharmacology; Oxidative Stress/drug effects; Oxidative Stress/physiology; Rats; Rats, Sprague-Dawley; Regeneration/physiology; src-Family Kinases/drug effects; src-Family Kinases/metabolism