Scientists have long searched for the causes of Alzheimer’s disease, but the answers may not lie only inside the brain.
New research from Houston Methodist indicates that unhealthy changes linked with obesity may send damaging messages from body fat to the brain.
The study was published in Molecular Neurodegeneration and highlights a possible new way to fight the disease.
The research team examined special fat molecules known as phosphatidylethanolamines. These molecules normally help build healthy cell membranes, but obesity appears to increase their levels. The extra molecules can be carried through the body inside tiny particles that eventually reach the brain.
After entering the brain, these particles may interfere with normal brain activity. The researchers found evidence that they reduce the brain’s natural immune protection, disrupt communication between nerve cells, and promote the buildup of amyloid protein. Amyloid plaques are one of the best-known biological changes seen in Alzheimer’s disease.
The team then explored whether restoring a healthier balance of these fats could reverse some of the damage. In Alzheimer’s disease models, improving lipid balance reduced harmful changes and led to better memory and thinking performance. This suggests that future medicines might focus on the pathway connecting obesity to the brain instead of treating brain damage alone.
Alzheimer’s disease affects millions of people worldwide, and the number is expected to rise sharply as populations age. While current treatments can help manage symptoms for some patients, they do not stop the disease from progressing. Researchers are therefore searching for ways to intervene much earlier.
The findings also reinforce the importance of maintaining good metabolic health. Eating a balanced diet, staying physically active, controlling blood sugar, and maintaining a healthy weight are already recommended for many reasons. This research suggests these habits may also play a role in supporting long-term brain health.
The scientists cautioned that much more work is needed before these discoveries can be turned into treatments for people.
Clinical studies will be required to confirm whether targeting these fat molecules is safe and effective. Until then, the results should be viewed as promising but preliminary.
If you care about brain health, please read studies about vitamin D deficiency linked to Alzheimer’s and vascular dementia, and higher magnesium intake could help benefit brain health.
For more information about brain health, please see recent studies about antioxidants that could help reduce dementia risk, and coconut oil could help improve cognitive function in Alzheimer’s.
Source: Houston Methodist.
