Alzheimer’s disease is one of the most common brain conditions in the world, especially among older adults. It slowly affects memory, thinking, and behavior.
At the beginning, a person may only forget small things, like where they put their keys or what they had for breakfast. Over time, the disease becomes more serious. People may struggle to recognize family members, have trouble speaking clearly, or find it hard to carry out daily tasks.
Scientists have been studying Alzheimer’s for many years. They know that the disease is linked to harmful changes in the brain. Two of the main problems are the buildup of beta-amyloid plaques and neurofibrillary tangles.
These are abnormal clumps of proteins that damage brain cells and stop them from working properly. As more cells are damaged, the brain slowly loses its ability to function well.
Recently, a team of researchers from the University of California San Diego made an important discovery that could help detect Alzheimer’s much earlier than before.
They found that high levels of a substance called PHGDH in the blood may act as an early warning sign of the disease. This is exciting because Alzheimer’s often begins many years before symptoms appear. If doctors can detect it early, there may be more chances to slow it down.
PHGDH is an enzyme, which means it helps chemical reactions happen in the body. Its main role is to help produce an amino acid called serine. Serine is important because it is used to build proteins and support brain function. Under normal conditions, the body carefully controls how much PHGDH is produced.
However, the researchers found that in people with Alzheimer’s, PHGDH levels are much higher than normal. This increase was seen not only in people who already had symptoms, but also in people who seemed healthy at the time but later developed the disease. This suggests that PHGDH could be a useful early signal that something is going wrong in the brain.
To study this further, the scientists examined brain tissue samples from people aged 50 and older. These samples came from several research groups and included people with Alzheimer’s, people with early brain changes, and healthy individuals.
In every group, those with Alzheimer’s had higher levels of PHGDH. They also found that people with higher levels of this enzyme performed worse on memory and thinking tests.
The researchers did not stop there. They also studied mice that were specially designed to develop Alzheimer’s-like symptoms. The same pattern appeared in these animals. The mice with the disease had higher PHGDH levels in their brains. This consistency between human and animal studies strengthens the idea that PHGDH plays an important role in Alzheimer’s.
One unexpected finding from the study involves serine supplements. Some people take serine as a health supplement because it is believed to support brain function.
However, since PHGDH helps produce serine, higher levels of PHGDH may already mean that too much serine is being made in the brain. This raises concerns that taking extra serine could make the situation worse for people at risk of Alzheimer’s. Because of this, researchers are advising caution until more is known.
Another important point from this study is the possibility of using a simple blood test to measure PHGDH levels. If this becomes reliable, doctors could identify people at risk long before they show symptoms. Early detection could allow people to start treatment sooner and possibly slow the progression of the disease.
Although there is still no cure for Alzheimer’s, there are ways to support brain health. Regular physical activity is one of the best strategies. Exercise improves blood flow to the brain and helps reduce inflammation. Eating a healthy diet is also important. Diets rich in fruits, vegetables, whole grains, and healthy fats have been linked to better brain health.
Keeping the mind active can also help. Activities like reading, learning new skills, solving puzzles, and spending time with others can strengthen brain connections. In addition, managing conditions such as high blood pressure, diabetes, and high cholesterol is important because these conditions can affect brain health.
This study was led by Professor Sheng Zhong and his team and was published in the scientific journal Cell Metabolism. Their work provides new insight into how Alzheimer’s develops and offers a possible way to detect it earlier than ever before.
Overall, this discovery brings new hope. If future research confirms these findings, measuring PHGDH levels could become a simple and effective way to identify Alzheimer’s early. This could give people more time to take action and improve their chances of maintaining brain health for longer.
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.
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