stem cells

Hundreds of clinics around the country are offering to treat a long list of health problems with stem cells.

The clinics claim that stem cells found in fat tissue, blood, bone marrow and even placentas can help people suffering from arthritic joints and torn tendons to more serious medical problems, including spinal cord injuries, Parkinson's disease and strokes. Some even claim the cells can help children with autism.

But leading stem cell researchers say there's not enough evidence to support the clinics' claims.

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.