24/08/2025
A new study may have uncovered the “off switch” for aging in the brain.
A team of scientists at the University of California, San Francisco has discovered a single protein, FTL1, that appears to play a central role in brain aging—and remarkably, blocking it may reverse memory loss.
In a series of experiments on mice, researchers found that elevated levels of FTL1 were linked to sluggish brain activity, reduced neural connections, and cognitive decline. When young mice were engineered to produce more FTL1, their brains began to mimic those of older animals. But when researchers reduced the protein in aged mice, the animals’ brains rebounded—restoring memory and strengthening neural pathways in the hippocampus, the region critical for learning.
The findings could mark a seismic shift in the fight against age-related cognitive decline. Instead of merely slowing the effects of aging, the study suggests it may be possible to reverse them at the molecular level. The research also showed that high FTL1 levels interfere with cellular metabolism, another key factor in brain aging.
By targeting FTL1, future therapies may one day treat—or even prevent—conditions like dementia and Alzheimer’s by restoring youthful brain function. “It’s much more than merely delaying or preventing symptoms,” said senior author Dr. Saul Villeda. “We’re talking about a real reversal.”
Source: Laura Remesal et al. Targeting iron-associated protein Ftl1 in the brain of old mice improves age-related cognitive impairment. Nature Aging, August 2025.
