Gain of survival signaling by down-regulation of three key miRNAs in brain of calorie-restricted mice
2011
How Eating Less Affects Brain Health
Commentary
Author Information
Author(s): Hutchison Emmette, Mattson Mark P.
Primary Institution: Laboratory of Neurosciences, National Institute on Aging Intramural Research Program
Hypothesis
Does calorie restriction influence microRNA levels in the aging brain?
Conclusion
Caloric restriction leads to lower levels of certain microRNAs in the brain, which may enhance neuronal survival.
Supporting Evidence
- Caloric restriction can induce the expression of neurotrophic factors that protect neurons.
- Three specific microRNAs were found to be lower in calorie-restricted mice, which may help prevent cell death.
- These microRNAs target Bcl2, a protein that helps keep brain cells alive.
Takeaway
Eating less can help your brain stay healthy by changing tiny molecules that protect brain cells.
Potential Biases
Potential off-target effects from manipulating microRNAs could lead to unintended consequences.
Limitations
The study focused only on three specific microRNAs and their effects on one protein.
Participant Demographics
Old mice (24-28 months old) were used in the study.
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