Key points from article :
Clinical trial in Japan will use reprogrammed stem cells to regenerate injured hearts.
Sheets of stem cell derived cardiomyocytes will be implanted into three patients.
Participants will receive iPS-derived cells from a donor, instead of their own tissue.
Induced pluripotent stem cells have proven effective in improving heart function in animal models.
Unclear whether cells become beating heart cells or just release factors that help existing cells.
Team led by Osaka University cardiac surgeon Yoshiki Sawa.
The study was published in the Nature journal.
