Headline:
New Study Links Herpes Virus to Alzheimer’s Disease
Subheading:
International research team finds additional evidence suggesting HSV-1‘s role in Alzheimer’s onset and progression
Article Body:
In a groundbreaking discovery, an international team of scientists, including researchers at the Hebrew University (HU) of Jerusalem, has uncovered supplementary evidence pointing to a potential link between the herpes simplex-1 (HSV-1) virus and Alzheimer’s disease (AD). The team’s findings, published in the scientific journal Cell Reports, suggest that HSV-1 may play a significant role in the development and evolution of the neurodegenerative disorder.
The study identified 19 proteins associated with HSV-1 present in the brains of patients with Alzheimer’s at various stages of the disease. These findings support the growing body of evidence indicating that infections, such as HSV-1, could be a potential factor in the onset and progression of Alzheimer’s.
Dr. Or Shemesh, the lead author of the study from HU, revealed that the research team employed advanced techniques to detect increased activity of an HSV-1 protein called ICP27 in the brains of Alzheimer’s patients. Intriguingly, ICP27 activity was notably high as the disease advanced.
ICP27 was predominantly found in the same regions as tau, a toxic protein in the brain linked to Alzheimer’s, yet was absent near amyloid plaques, another hallmark of the disease. This suggests a direct impact of HSV-1 on tau, contributing to Alzheimer’s-related changes.
Utilizing human brain organoids derived from stem cells, the researchers demonstrated that HSV-1 infection can trigger specific tau modifications associated with Alzheimer’s. Initially, these modifications appeared to protect brain cells by reducing viral presence and preventing cellular death. However, over time, they contributed to brain deterioration as the disease progressed.
Moreover, the study shed light on the brain’s immune response as a factor in Alzheimer’s pathology, focusing on the cGAS-STING pathway, which influences tau protein modifications.
"Our research illustrates how HSV-1 interacts with the brain and influences Alzheimer’s pathologies," said Dr. Shemesh. "At the early stages, tau modifications may protect brain cells by limiting the virus. But, over time, these modifications can harm the brain and accelerate neurodegeneration."
The findings offer new insights into how infections and the brain’s immune system may influence Alzheimer’s disease. The researchers suggest that targeting viral activity or modulating the immune response could open doors to novel therapies, according to a statement by HU.
As the global understanding of Alzheimer’s and its potential triggers continues to grow, so too does the hope for effective preventive and therapeutic strategies.