Embryonic stem cell - based tissue engineering may help repair damaged heart muscle

NEW YORK--Embryonic stem cells may hold the key to regenerating damaged heart muscle, when transplanted within a 3-dimensional scaffold into the infracted heart, according to a new study coming out in June in the Journal of Heart and Lung Transplantation. In the study, embryonic stem cells were more successful in restoring heart muscle when transplanted within a 3-dimensional matrix into damaged hearts in an animal model of severe infarction.

The new study addresses several problems that have plagued previous attempts to regenerate damaged heart muscle, according to Theo Kofidis, M.D., who has an active tissue engineering program at Stanford.

"Tissue engineering holds out promise of truly healing the heart after congestive heart failure," said Dr. Kofidis, lead author of the study and research fellow in cardiothoracic surgery at the Falk Research Center at Stanford University Medical School in Stanford, Calif. "There are 460,000 cases of congestive heart failure in the United States each year and the preeminently efficient treatment we have at this time is heart transplantation. Through tissue engineering we could actually restore the function of the heart by replacing large portions of the damaged heart muscle by a bioartificial one."

Dr. Kofidis spoke today at an American Medical Association media briefing on cardiology in New York City.

Kofidis and his colleagues had been working with bone marrow stem cells, but these cells were not able to become heart muscle cells and regenerate the heart. "In our most recent studies we showed that mouse and human embryonic stem cells improved heart function, had superior survival within the heart weeks later we still saw improved heart function and had definitely differentiated into heart muscle cells," he said. "We inserted a bioluminescent marker (what causes fireflies to luminesce) into our stem cells and were able to see that they engrafted in the living organ."

There a

Contact: Amy Adams
American Medical Association

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