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New stem cell combination could help to repair damaged hearts

LONDON (UK), August 2019 — A combination of heart cells derived from human stem cells could be the answer to developing a desperately-needed treatment for heart failure, according to new research published in Nature Biotechnology.

Researchers have found that, by transplanting an area of damaged tissue with a combination of both heart muscle cells and supportive cells taken from the outer layer of the heart wall, they may be able to help the organs recover from the damage caused by a heart attack.

Scientists have been trying to use stem cells to repair damaged hearts for a number of years. Efforts have been unsuccessful so far, mainly because the vast majority of transplanted cells die within a few days.

Now, Sanjay Sinha, M.D., Ph.D., and his team at the University of Cambridge, in collaboration with researchers at the University of Washington, have used supportive epicardial cells developed from human stem cells to help transplanted heart cells live longer.

The researchers used 3D human heart tissue grown in the lab from human stem cells to test the cell combination, finding that the supportive epicardial cells helped heart muscle cells to grow and mature. They also improved the heart muscle cell's ability to contract and relax.

In rats with damaged hearts, the combination also allowed the transplanted cells to survive and restore lost heart muscle and blood vessel cells.

Researchers now hope to understand how the supportive epicardial cells help to drive heart regeneration. Understanding these key details will bring them one step closer to testing heart regenerative therapies in clinical trials.

During a heart attack, part of the heart is deprived of oxygen leading to death of heart muscle. This permanent loss of heart muscle as well as subsequent scarring combines to reduce the heart's ability to pump blood around the body. People suffering from heart failure can't regenerate their damaged hearts and the only cure is a heart transplant. Ultimately, these researchers hope that, by harnessing the regenerative power of stem cells, they will one day be able to heal human hearts using a patient's own cells.

Watch the video: https://www.eurekalert.org/multimedia/pub/207807.php?from=437410

Learn more:
https://www.bhf.org.uk/what-we-do/news-from-the-bhf/news-archive/2019/august/new-stem-cell-combination-could-help-to-repair-damaged-hearts
https://www.nature.com/articles/s41587-019-0197-9