Researchers discovered why the APOE ε2 variant of the APOE gene is associated with a lower risk of Alzheimer’s and a slightly longer lifespan. This variant appears to keep the blood-brain barrier stronger and functioning better. The blood-brain barrier protects the brain by preventing harmful substances and cells from entering. With age, this barrier often becomes less effective, leading to inflammation and damage in the brain.
Pericytes play an important role in this process; they are cells that support the blood vessels in the brain and contribute to maintaining this barrier. Research shows that pericytes in people with the APOEε2 variant are more resilient. They contribute better to preventing leaks in the blood vessels of the brain. This helps to reduce inflammation and further damage, which reduces the risk of neurodegenerative diseases such as Alzheimer’s.
The findings provide new insights into how genetics can influence healthy aging. By better understanding the mechanisms that protect the blood-brain barrier, new treatments may eventually be developed in the future. Such breakthroughs could contribute to delaying or preventing age-related brain diseases.
For people who want to age without cognitive decline, this research is reassuring. It highlights the importance of the blood-brain barrier and the cells that protect the brain. Through this knowledge, we can take steps towards healthier brain function in later life.
Source: Reason
