Researchers have identified an unexpected role for the protein TRF2 in muscle repair, a finding that may open new avenues for treating muscular dystrophy. Best known for protecting chromosome ends, TRF2 also appears to help muscle stem cells retain their identity and regenerate injured tissue, according to the study. When scientists removed the protein in mice, the animals' muscles struggled to repair themselves, and damaged tissue was replaced by fat and scar tissue. In models of muscular dystrophy, removal of TRF2 caused the disease to progress dramatically faster, underscoring the protein's importance in maintaining muscle integrity.
The discovery adds to a growing body of research showing that proteins with well-established roles in one cellular process can perform separate functions elsewhere in the body. For patients with muscular dystrophy and other muscle-wasting conditions, the findings raise the possibility that therapies targeting TRF2 or its related pathways could help preserve muscle function. Researchers caution that the work was conducted in mice and that further studies are needed to determine whether the same mechanism operates in humans. The findings were published in a peer-reviewed journal; independent experts not involved in the study said the results warrant follow-up but stressed that clinical applications remain years away.
Independent reporting synthesized from primary wires and global correspondents.