Tuesday, August 17, 2010

Mayo's 'smart' adult stem cells repair hearts

Mayo Clinic investigators, with Belgian collaborators, have demonstrated that rationally "guided" human adult stem cells can effectively heal, repair and regenerate damaged heart tissue. The findings -- called "landmark work" in an accompanying editorial -- appear in today's Journal of the American College of Cardiology.

Stem cells isolated from patients have normally a limited capacity to repair the heart. This innovative technology boosts the regenerative benefit by programming adult stem cells to acquire a cardiac-like profile. Primed by a cocktail of recombinant cardiogenic growth factors, mesenchymal stem cells (MSCs) harvested from the bone marrow of a cohort of patients with coronary artery disease showed "superior functional and structural benefit without adverse side effects" over a 1-year follow-up in a model of heart failure according to the study.

"These findings provide proof-of-principle that "smart" adult stem cells have added benefit in repairing the heart, providing the foundation for further clinical evaluation," says Andre Terzic, M.D., Ph.D., Mayo Clinic
researcher and senior investigator of the study. "The successful use of guided "lineage specified" human stem cells is based on natural cardiogenic cues" adds Atta Behfar, M.D., Ph.D. first author of the study. The pre-clinical data reported in this seminal paper have cleared the way for safety and feasibility trials in humans, which were recently conducted in Europe.

In their editorial, Eduardo Marban, M.D., Ph.D., and Konstantinos Malliaras, M.D., of Cedars-Sinai Heart Institute, in Los Angeles describe the Mayo approach as a "boot camp" for stem cells and also write that the study "… provides the first convincing evidence that MSCs, at least in vitro, can in fact become functional cardiomyocytes (heart cells) …"

The long-term potential of the findings include development of an effective regenerative medicine therapy for patients with chronic heart failure.


Source and More:
http://www.physorg.com/news201230041.html

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