Zebrafish Protein & Heart Repair: Gene Activation Discovery
- A protein derived from zebrafish has shown remarkable success in repairing damaged mouse hearts,according to researchers at the Hubrecht Institute's Bakkers group.
- The human heart, unlike that of the zebrafish, cannot regenerate heart muscle cells after a heart attack, often leading to heart failure.
- Dennis de Bakker, the study's first author, explained that the team compared gene activity in damaged and healthy hearts of zebrafish and mice. Thay found that the Hmga1...
Zebrafish protein, Hmga1, is showing remarkable promise in heart regeneration research! Researchers have discovered it repairs damaged mouse hearts by activating dormant repair genes, avoiding side effects. Unlike humans, zebrafish can fully regenerate heart muscle cells. Studies show that this protein could lead to regenerative therapies preventing heart failure. The Hmga1 gene is active in zebrafish during heart repair but not in mice, indicating it’s key role. This groundbreaking discovery is a significant step toward unlocking the heart’s regenerative potential, with cell division observed only in the damaged area. News Directory 3 continues to report cutting-edge science,test the protein on human heart muscle cells for further refinement,and explore heart regeneration in 2025. Discover what’s next in this field.
Zebrafish protein Shows Promise in Heart Regeneration Research
Updated June 23,2025
A protein derived from zebrafish has shown remarkable success in repairing damaged mouse hearts,according to researchers at the Hubrecht Institute’s Bakkers group. The study,published in nature Cardiovascular Research on Jan. 2, 2025, highlights the potential of Hmga1, a protein crucial for heart regeneration in zebrafish, to restore heart function in mammals.
The human heart, unlike that of the zebrafish, cannot regenerate heart muscle cells after a heart attack, often leading to heart failure. Zebrafish, tho, can fully restore heart function within 60 days of injury. Jeroen Bakkers, who led the study, noted the importance of understanding why some species can regenerate while others cannot, with the goal of developing therapies for human heart failure.
Dennis de Bakker, the study’s first author, explained that the team compared gene activity in damaged and healthy hearts of zebrafish and mice. Thay found that the Hmga1 gene was active during heart regeneration in zebrafish but not in mice, indicating it’s key role in heart repair.
Mara Bouwman, co-first author, said that Hmga1 works by removing molecular “roadblocks” on chromatin, which packages DNA. This allows dormant genes to become active again.
When applied to damaged mouse hearts, the Hmga1 protein stimulated heart muscle cells to divide and grow, significantly improving heart function, Bakkers said. Cell division occurred only in the damaged area, with no adverse effects observed. Bouwman emphasized that this suggests the damage itself signals the activation of the repair process.
Researchers found that while the Hmga1 protein is not produced in adult human hearts after a heart attack, the gene is present and active during embryonic development. Bakkers believes this provides a foundation for gene therapies to unlock the heart’s regenerative potential in humans.
What’s next
While the findings open doors for targeted regenerative therapies for heart regeneration, Bakkers said further refinement and testing are needed before clinical application. The next step involves testing the protein on human heart muscle cells in culture, in collaboration with UMC Utrecht. The Summit program (DRIVE-RM) will further explore heart regeneration in 2025.