The heart tissue of mammals has limited capacity to regenerate after an injury such as a heart attack, in part due to the inability to reactivate a cardiac muscle cell and proliferation program. Recent studies have indicated a low level of cardiac muscle cell (cardiomyocytes) proliferation in adult mammals, but it is insufficient to repair damaged hearts. Now researchers from the University of Pennsylvania have … Continue reading Researchers induce microRNA-based cardiomyocyte proliferation after heart attack in animal model.