stem cells

Courtesy of the Murry Lab / University of Washignton

Seattle researchers have taken a key step toward beating back the world’s leading cause of death by regrowing damaged heart tissue in monkeys.

Scientists had long thought getting heart tissue to regenerate was impossible. But stem cell research began to raise hopes in the 1990s, and over the years, researchers like Chuck Murry of University of Washington Medicine’s cardiology division started to get some traction.

First came successes with rats, then with guinea pigs. Now Murry’s team has managed to repair heart tissue in an animal more closely related to humans: monkeys called pigtail macaques.