# Alzheimer’s disease research developments

> Live situation record from CLSTR: https://clstr.news/situations/alzheimers-disease-research-developments
> Updated: 2026-10-04T15:00:00.000Z. Sources: 7. Developments: 2.

Recent neurological research has identified two distinct biological mechanisms that may offer pathways for mitigating Alzheimer’s disease and its associated neurodegeneration.

Researchers at Washington University School of Medicine demonstrated that targeting the immune system can reduce brain damage in tauopathies. By using an antibody to block the CXCR3 protein, scientists were able to prevent T cells from infiltrating the brain. In mouse models, this treatment reduced T cell presence by approximately half and allowed subjects to retain roughly 40% more tissue in memory centers and perform better on memory tests, even without changing tau protein levels. Senior author David M. Holtzman stated that this pathway offers a way to “potentially decrease brain cell death by mitigating the immune system’s response to tau accumulation.”

Separately, researchers at Columbia University identified a mechanism that may explain why some individuals with the high-risk APOE ε4 gene do not develop the disease. Their study suggests that a rare mutation in the fibronectin (FN1) gene protects the blood-brain barrier by limiting the buildup of fibronectin. Because excessive accumulation can damage the barrier and prevent the removal of toxic substances from the brain, researchers suggest that blocking this process could lead to new drug developments.

## Timeline

### 2026-10-04: Columbia University researchers identify Alzheimer's protection mechanism

Columbia University researchers have identified how a fibronectin gene mutation may protect high-risk APOE ε4 carriers from Alzheimer’s by preventing damage to the blood-brain barrier.

2 sources. https://clstr.news/cluster/columbia-university-researchers-identify-alzheimers-protection-mechanism

### 2026-09-28: Washington University researchers find way to limit Alzheimer’s-related brain damage

Washington University researchers found that blocking the CXCR3 protein can prevent T cells from entering the brain, reducing neurodegeneration and preserving memory in Alzheimer’s-like mouse models.

5 sources. https://clstr.news/cluster/washington-university-researchers-find-way-to-limit-alzheimers-related-brain-damage

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Cite as: Alzheimer’s disease research developments. CLSTR, https://clstr.news/situations/alzheimers-disease-research-developments