A recent study helps explain how genetic sensitivity to sleep loss determines the extent of brain damage and cognitive decline when staying awake.
The Role of the AQP4 Gene in Brain Response to Sleep Loss
Researchers found that the impact of missing sleep hours is not only related to duration but also to genetic differences. Attention is focused on a gene called AQP4, which is responsible for:
- Regulating fluid movement within the brain.
- Operating the system that expels waste and accumulated materials between neurons.
- Removing proteins that may increase the likelihood of Alzheimer’s disease, a process that becomes more effective during sleep.
Impact of Genetic Variants on Gray Matter
Analysis of 13 variants of the AQP4 gene showed that individual responses vary based on their biological makeup. Scientists observed the following:
- People carrying specific genetic variants face a higher risk of losing gray matter during sleep deprivation.
- Gray matter is the part responsible for thinking, learning, memory, and decision-making.
- For some, difficulty sleeping was linked to changes in brain structure and a decrease in volume, but these results varied according to each person’s genetic variant.
The Link Between Genetics and Alzheimer’s Disease
The existence of genetic sensitivity to sleep loss explains why two people may have the same risk factors for Alzheimer’s, yet the impact of sleep disorders on their brain health differs. This genetic variation may explain why cognitive abilities decline more rapidly in some individuals compared to others, despite similar sleep conditions.
These findings open the door to developing personalized preventive strategies that consider biological differences rather than relying on general advice. However, researchers do not currently recommend genetic testing to assess Alzheimer’s risk due to insufficient large-scale studies.
FAQ
Why does sleep deprivation hurt some people more than others?
This is due to variants in the AQP4 gene, as some of these variants make the brain more susceptible to the damage caused by staying awake and the loss of gray matter.
How does the AQP4 gene affect brain health?
This gene regulates fluids and activates the waste removal system for harmful proteins between neurons, especially during sleep.
Can genetic tests be used to prevent Alzheimer’s now?
No, researchers emphasize that current results do not justify resorting to genetic testing to assess risk, and more research is still needed.
When Should You Visit a Doctor?
It is recommended to consult specialists when the following signs appear:
- Persistent difficulty falling asleep.
- Noticeable deterioration in memory or cognitive abilities.
- Feeling severe and persistent effects of sleep deprivation on concentration and decision-making.
Disclaimer: This content is for informational purposes only and does not substitute for professional medical advice.
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Illustration: AI-generated
approved by: Medica Health team