Barriers Fall in Cardiac Regeneration Breakthrough
Researchers have identified a protein called CHST7 that acts as a barrier to cellular reprogramming in the human heart. By understanding how this protein interacts with CD44 receptors, scientists hope to develop new treatments to help the heart repair itself after injury.
Why it matters
This discovery could lead to breakthrough medical therapies for heart disease, which remains a leading cause of death globally.
Specialized cells in our body make biological tradeoffs to do certain jobs. To support large and hardworking hearts that power our other organs, our heart cells evolved to be extremely efficient and resilient.
Because the adult human heart can no longer repair itself the way skin does, scientists have studied ways to reprogram heart cells to regenerate after heart attacks. Heart cells have very stable identities, however, and are resistant to being reprogrammed.
Scientists at Sanford Burnham Prebys Medical Discovery Institute and collaborators at The Johns Hopkins University School of Medicine published findings July 17, 2026, in Nature Communications uncovering a new mechanism used by cells to protect their cellular identities and ward off reprogramming attempts. Continued study of the obstacles to cellular reprogramming may lead to treatments that can help the heart fix itself after injury.
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