Deleting a gene preserved muscle strength in female mice
Female mice with a muscle-specific gene deletion retained strength and had an 11% longer median lifespan than female controls.
Our read
Mechanisms- Studied:
- Experiments in aged female mice, against control mice (Blinded)
- What changed:
- Aged female mice lacking muscle Terf2 preserved muscle strength compared with control mice
- The catch:
- Deletion began early in life; effects of starting during aging were not measured
- In the record:
- One of 110 papers on TERF2 on record: 18 with results in people, 8 in animals.
Editor of record: Boris Djordjevic · AgingResearch.News
Aged female mice with a deletion of the Terf2 gene specifically in skeletal muscle fibers showed preserved muscle strength in a genetic experiment. Terf2 encodes TRF2, a protein that protects chromosome ends. The mice also showed less age-related muscle shrinkage.
Muscle-fiber size measurements used three to five mice per genetic group at each age. Fiber size remained stable through 15 months in mice with the deletion, while it declined with age in controls. Female mice with the deletion had an 11% longer median lifespan than female controls. Male groups had similar median lifespans of around 25 months. The muscle changes occurred without evidence that chromosome ends had lost their protection.
Why it matters
The authors propose that age-related declines in TRF2 trigger a beneficial adaptation to mild stress, helping muscle function during aging.
Caveats
A muscle-specific gene deletion leaves open whether lowering TRF2 later in life would produce the same effects. The lifespan benefit was specific to female mice.
Where the evidence stands
TERF2
- 21 independent labs in 9 countries
- 3 findings against
- Funders: National Natural Science Foundation of China and others
- 2 of 45 findings with company ties
Oxidative stress and ROS signaling
- 984 independent labs in 74 countries
- 129 findings against
- Funders: National Natural Science Foundation of China and others
- 140 of 3,055 findings with company ties
- TERF2
- Oxidative stress and ROS signaling
- Telomerase and telomere maintenance
- Muscle atrophy
- Regenerative nuclear markers
- Mice
The paper
Female-specific anti-ageing effects of TRF2 inhibition in skeletal myofibres
Côte d'Azur University; Université Lyon1
Philosophical Transactions of the Royal Society of London, Series B, Nov 12, 2026, Open access, CC BY
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