As we grow older, our cognitive learning and memory capabilities decline—recent studies have identified the proteins responsible for this phenomenon.
Researchers at UC San Francisco have pinpointed the culprit: an iron-associated protein called FTL1. Its detrimental effects hinder cognitive awareness throughout the aging process, and understanding this may allow us to target it in treating neurodegenerative diseases such as Parkinson’s and Alzheimer’s.
“It’s essentially a reversal of the challenges,” said Saul Vilda, PhD, Associate Director and Senior Author of the Papers at UCSF Bakar Aging Research Institute; Natural aging. “It’s about more than just slowing or preventing symptoms.”
The hippocampus, a brain region essential for learning and memory, is particularly susceptible to the effects of aging. Researchers observed an increase in neuronal FTL1 in the hippocampus of older mice, correlating with cognitive decline and reduced intercellular connections.
In an experiment, scientists artificially increased FTL1 levels in young mice, leading to brain and behavior changes reminiscent of older mice. Elevated FTL1 levels hinder synaptic connections, ultimately resulting in poorer memory performance.
Interestingly, their motor skills and anxiety levels remained stable, indicating that the cognitive impairments were specifically linked to memory and synaptic functions.
When researchers reduced FTL1 levels in the hippocampus of older mice, they noted improved neuronal connections and enhanced performance in memory tests, effectively reversing some signs of aging.
The FTL1 protein is involved in iron storage and metabolism, regulating long-term levels in the brain. As we age, alterations in iron metabolism lead to increased FTL1 in neurons.
By reversing aspects of cognitive aging in mice, this discovery could pave the way for treatments that counteract the effects of FTL1 in the brain, potentially restoring cognitive function in older adults.
“Identifying elements that seem to promote aging while keeping your brain youthful is crucial for overall health and activity as you age. FTL1 appears to be an anti-aging champion,” stated Andrew Steel in BBC Science Focus.
“This is an intriguing preliminary study, but as this research was conducted on mice, we must observe whether the same effects occur in humans.”
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Source: www.sciencefocus.com
