v1

mechanistic

Analysis v1

Strong Support

Rapamycin might help older animals keep their muscle and stay lean by tweaking a key cell signal involved in aging.

19

Pro

9

Against

Evidence from Studies

Supporting (1)

19

Community contributions welcome

19

The neuromuscular junction is a focal point of mTORC1 signaling in sarcopenia

Cohort Study

Animal

2020 Sep 9

The study shows that giving rapamycin to older mice helps protect their muscles from aging, which supports the idea that it can prevent muscle loss in aging.

Contradicting (1)

9

Community contributions welcome

9

Rapamycin Treatment Induces Lipidomic and Metabolic Changes in Skeletal Muscle of Aged Mice with Hyperactive mTORC1

Cohort Study

Animal

The study looked at rapamycin in old mice with a genetic change that makes a certain protein overactive, not in normal aging mice. It didn’t measure muscle loss or body composition, so we can’t say if rapamycin helps prevent age-related muscle loss.

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Similar Assertions

Giving older mice a drug called rapamycin helps keep their muscles strong and working well as they age, especially in some muscles but not others.

19

0

84%

Taking rapamycin with exercise might help improve muscle strength in older people by affecting a specific cell pathway in the body.

0

73

83%

As we get older, a protein in our muscles called mTORC1 can become overactive, which slows down the body's cleanup process for damaged parts inside cells. Taking rapamycin might help turn that cleanup process back on.

0

73

81%

Turning on a certain signal in mouse muscles makes them age faster, causing nerve and muscle problems like those seen in old age — but this can be reversed with a drug called rapamycin.

19

0

77%

Taking rapamycin between workouts might help your muscles clean out junk and rebuild stronger as you age — like getting the best of both rest and exercise.

11

73

77%