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Decellularized mouse heart beats again after regenerating with human heart precursor cells
Date:8/14/2013

omyocytes, endothelial cells and smooth muscle cells," Dr. Yang explained. "Nobody has tried using these MCPs for heart regeneration before. It turns out that the heart's extracellular matrix the material that is the substrate of heart scaffold can send signals to guide the MCPs into becoming the specialized cells that are needed for proper heart function."

After a few weeks, the mouse heart had not only been rebuilt with human cells, it also began contracting again, at the rate of 40 to 50 beats per minute, the researchers found. More work must be done to make the heart contract strongly enough to be able to pump blood effectively, and to rebuild the heart's electrical conduction system correctly so that the heart rate speeds up and slows down appropriately.

In the future, it might be possible to take a simple skin biopsy from a patient to derive personalized MCPs that can be used to seed a biologic scaffold and regenerate a replacement organ suitable for transplantation, Dr. Yang noted. The model also could be used as a lab-based method to preclinically test the effect of new drugs on the heart or to study how the fetal heart might develop.

"One of our next goals is to see if it's feasible to make a patch of human heart muscle," he added. "We could use patches to replace a region damaged by a heart attack. That might be easier to achieve because it won't require as many cells as a whole human-sized organ would."


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Contact: Anita Srikameswaran
SrikamAV@upmc.edu
412-578-9193
University of Pittsburgh Schools of the Health Sciences
Source:Eurekalert

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