Duke-NUS Finds Exercise Cuts DEAF1 to Reverse Muscle Aging in Flies and Mice
Updated
Updated · ScienceDaily · Jul 6
Duke-NUS Finds Exercise Cuts DEAF1 to Reverse Muscle Aging in Flies and Mice
1 articles · Updated · ScienceDaily · Jul 6
Summary
Duke-NUS researchers identified DEAF1 as a molecular switch behind muscle aging, showing that exercise lowers the gene and restores older muscles’ ability to repair damage and maintain strength.
High DEAF1 levels drive mTORC1 into overactivity, pushing aging muscle cells to make proteins while failing to clear damaged ones; exercise rebalances that pathway by activating proteins that suppress DEAF1.
Experiments in fruit flies and older mice produced the same pattern: raising DEAF1 sped muscle weakening, while lowering it improved protein balance and muscle strength.
Some older muscles may respond less because DEAF1 is already too high or FOXO activity has fallen too far, helping explain why exercise benefits vary across older adults.
The PNAS study suggests DEAF1-targeted therapies could one day mimic part of exercise’s benefit for older people or patients recovering from surgery, illness or cancer.
Could a pill targeting one gene truly replicate all the anti-aging benefits of exercise?
How can workouts be personalized for seniors whose genes resist the benefits of exercise?
How Exercise "Rewinds" Muscle Aging: The FOXO–DEAF1–mTORC1 Pathway Unveiled
Overview
Recent research from Duke-NUS Medical School, published in PNAS, has revealed how exercise can reverse age-related muscle decline by uncovering a key molecular mechanism. The study found that muscle aging is not just about losing muscle mass, but about losing the ability to maintain healthy muscle tissue. A gene regulator called DEAF1 was identified as central to this process. Exercise helps by signaling muscles to 'clean up and reset,' restoring their repair capacity. This discovery opens new possibilities for both exercise-based and medical strategies to help older adults maintain strength, mobility, and independence.