For heart repair, call RNA

After attack, small molecules help contracting cells regenerate in mice

cardiac muscle cells

CHANGE OF HEART  Researchers used small RNA molecules to make mouse cardiac muscle cells (such as this one highlighted in green and blue) start dividing again after a heart attack. 

Lab of Ed Morrisey, Ph.D./Perelman School of Medicine/University of Pennsylvania

When people suffer a heart attack, they can’t regrow muscle cells that have died after being deprived of oxygen.