A recent scientific study has revealed the role of water molecules in the aggregation of the "tau" protein in the brain, one of the proteins associated with Alzheimer's disease, providing a deeper understanding of the molecular mechanisms that contribute to the formation and spread of harmful protein aggregates among nerve cells.
The scientific website "ScienceAlert" reported the day before yesterday that the study was led by researcher Songye Han from Northwestern University in the United States, in collaboration with researchers from the University of California, Santa Barbara, and its results were published in October in the journal "Proceedings of the National Academy of Sciences".
The researchers clarified that the "tau" protein performs important functions within nerve cells, but it may take an abnormal shape in some cases, aggregating into long fibers that can damage cell functions. These aggregates, when transferred to other cells, may stimulate healthy "tau" proteins to adopt the same abnormal shape.
The study showed that researchers identified a small region in the protein, which they named the "hotspot," playing a fundamental role in initiating the binding of protein molecules to each other. Water molecules surround this region, helping to stabilize its structure. However, when two similar regions approach each other, water molecules are released, facilitating protein binding and initiating aggregation.
To understand this mechanism, the team used a laboratory model of a short segment of the "tau" protein, along with practical experiments and computer simulations. The results showed that adding a chemical tag to the identified region stopped the growth of protein fibers under experimental conditions, while the same effect was not observed when targeting other regions of the protein.
The researchers pointed out that identifying this region may help guide future research toward developing means to limit the aggregation of the "tau" protein. However, the results do not mean that a cure for Alzheimer's disease has been found, as this mechanism still requires further study and evaluation.
The results add new understanding to the molecular interactions that affect protein behavior within the brain and may help in the future to identify new research targets for studying neurodegenerative diseases, including Alzheimer's.
Alzheimer's is a progressive neurological disease that affects brain cells and is the most common cause of dementia. Over time, it leads to a decline in memory, thinking, and learning abilities, and may affect the patient's ability to perform daily activities and communicate with others.
Source: Syrian Arab News Agency (SANA)
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