Alzheimer’s disease is a condition that slowly affects memory and thinking.
It is one of the most common brain diseases in older adults, and many families are affected by it.
Scientists have spent many years trying to understand why it happens, but the full picture is still not clear.
Now, a new study has uncovered a surprising clue. Researchers from Boston Children’s Hospital have found that some cells in the brain carry genetic changes that are usually linked to cancer.
Instead of causing tumors, these changes may be helping to drive Alzheimer’s disease. The study was published in the scientific journal Cell.
Inside the brain, there are special immune cells called microglia. These cells help keep the brain clean and safe. They remove waste, damaged cells, and harmful substances. They also react when there is injury or infection. Because of this, microglia play an important role in keeping brain cells healthy.
As people age, small changes happen in the DNA of their cells. These changes are normal and happen over time. However, the researchers found that in people with Alzheimer’s disease, microglia had more changes than expected. Many of these changes were found in genes that are known to drive cancer.
To study this, the team examined brain samples from hundreds of individuals. Some had Alzheimer’s disease, while others did not. They focused on genes that are often linked to cancers such as leukemia. They discovered that certain genes were repeatedly changed in the brains of people with Alzheimer’s.
This suggests that some microglia cells may gain an advantage and grow more than others. These cells may become more active and respond more strongly to signals in the brain. Instead of protecting the brain, they may create a harmful environment.
The researchers also made an unexpected discovery when they looked at blood samples. They found that the same genetic changes were present in blood cells. This suggests that some of these cells may travel from the blood into the brain.
Normally, the brain is protected by a special barrier that blocks most cells from entering. But this barrier may become weaker with age or disease. When it weakens, blood cells may enter the brain and take on new roles.
The team believes that these incoming cells may act like microglia once they are in the brain. Because they carry certain mutations, they may grow faster or react more strongly than normal cells. This can lead to more inflammation.
At the same time, Alzheimer’s disease is known to involve the buildup of harmful proteins in the brain. These proteins trigger the immune system to respond. The mutated cells may respond in a stronger way, which can damage healthy brain cells.
Over time, this damage can lead to the loss of neurons, which are the cells responsible for thinking and memory. This process is a key part of how Alzheimer’s disease develops.
One of the most exciting parts of this research is the possibility of new ways to detect the disease. Since the mutations were found in blood cells, it may be possible to develop a simple blood test to identify people at higher risk. This could help doctors diagnose the disease earlier.
The study also suggests new ideas for treatment. Since the mutations are similar to those found in cancer, some cancer drugs might be useful for Alzheimer’s. This could open new paths for therapy.
However, the study also has limitations. It does not prove that these mutations directly cause Alzheimer’s disease. There may be other factors involved, and more research is needed to understand the full process.
In addition, Alzheimer’s is a complex disease with many different causes. Not all patients may have the same changes, so treatments may need to be personalized.
Even with these limits, the study provides a fresh perspective. It shows that the disease may be linked to changes in the immune system and how cells behave over time. This new understanding could lead to better ways to detect and treat Alzheimer’s in the future.
If you care about Alzheimer’s, please read studies about Vitamin D deficiency linked to Alzheimer’s, vascular dementia, and Oral cannabis extract may help reduce Alzheimer’s symptoms.
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