The goal is to grow the valves in the lab during a pregnancy and then implant them into a baby with heart defects after it is born.
Italian researchers found that injections of stem cells into golden retrievers suffering from muscular dystrophy helped with their symptoms.
"Even though by itself it may not lead to a complete cure, it would ameliorate the condition and then step by step we could work on this to the point of getting a real cure," he told Reuters.
After more tests on dogs, Cossu and his team hope to begin trials of the stem cell treatment in humans in a few years' time.
A biotechnology company is expanding its clinical trials using adult stem cells to treat heart attack patients and patients with heart failure.
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