A protein once thought to mainly protect chromosome ends may also be essential for keeping muscle stem cells ready to repair injuries. Researchers found that TRF2 helps these cells maintain their identity and coordinate the cycle of rest, repair, and renewal.
A protein best known for protecting chromosomes may also be one of the hidden keys to muscle repair and muscular dystrophy.
A protein traditionally associated with protecting chromosome ends also plays an unexpected role in helping muscle stem cells remain functional and rebuild injured tissue, according to researchers at the Perelman School of Medicine at the University of Pennsylvania. The discovery could guide future research into muscular dystrophy treatments while also offering broader clues about cancer biology.
The study, published in Science Advances, found that TRF2 does much more than shield chromosomes. Within muscle stem cells, it helps preserve the genetic instructions that define the cells and allow them to regenerate muscle after damage.
“For years, TRF2 has been viewed as a protein whose primary job is protecting the ends of chromosomes from damage or corruption,” said senior author Foteini Mourkioti, PhD, an associate professor of Orthopedic Surgery at Penn Medicine. “But rather than simply protecting DNA, TRF2 seems to be key to regenerating muscle throughout life.”
https://www.sciencedaily.com/releases/2026/08/260801042814.htm
