Last Updated on July 14, 2026 by Staff
A new study has given us some evidence that removing amyloid plaques from the brain may slow down Alzheimer’s disease. Researchers from the Perelman School of Medicine at the University of Pennsylvania looked at the brain of a person who had taken part in a trial for an experimental anti-amyloid treatment. Their findings, presented at the 2026 Alzheimer’s Association International Conference and published in JAMA showed a pattern.
Brain areas where amyloid plaques had been cleared had few tau tangles, another protein that causes memory loss and brain cell damage. In areas where amyloid remained scientists found more tau buildup and signs of ongoing brain damage.
The discovery helps us understand how removing amyloid plaques could stop the chain of events that leads to Alzheimer’s symptoms.
Two Proteins Behind Alzheimer’s
Alzheimer’s disease is mainly caused by two proteins: beta-amyloid and tau. Beta-amyloid builds up outside nerve cells forming plaques in the brain. Tau builds up neurons creating tangled fibers that interfere with normal brain function.
Scientists think that amyloid plaques appear first allowing tau tangles to spread. Once tau starts building up brain cells gradually lose their ability to function and eventually die, causing memory loss and cognitive decline.
Recent Progress in Alzheimer’s Treatment
In years we’ve made progress in Alzheimer’s treatment with drugs that remove amyloid plaques.
Aducanumab was the anti-amyloid therapy to get FDA approval followed by more effective treatments like Lecanemab (Leqembi) and Donanemab (Kisunla).
What Researchers Found
The study looked at the brain of a man in his fifties who had been diagnosed with cognitive impairment caused by Alzheimer’s disease.
When scientists examined his brain they saw a patchwork pattern. The raised folds of the brain had been largely cleared of amyloid plaques. Had very little tau buildup and minimal brain damage. In contrast the grooves between these folds still had amounts of amyloid and displayed more tau accumulation, inflammation and ongoing brain damage.
Why the Findings Matter
The results support the theory that amyloid plaques help trigger tau pathology. When amyloid disappeared tau struggled to accumulate. Where amyloid remained tau continued spreading and damaging brain tissue.
This provides evidence that anti-amyloid therapies may do more than just remove plaques. By preventing or slowing tau buildup these treatments could also reduce long-term brain damage for cognitive decline.
Future of Alzheimer’s Treatment
Scientists now want to answer important questions. One priority is understanding why some brain regions remove amyloid effectively than others. Learning how to enhance these natural clearance mechanisms could improve treatments.
Researchers also think that timing is critical. Amyloid starts building up years before Alzheimer’s symptoms appear. If doctors can identify at-risk individuals early and remove amyloid before significant tau buildup begins they may be able to delay or even prevent the disease from developing.
Several ongoing clinical trials are testing whether anti-amyloid therapies work better when administered before memory problems begin. Although much research remains this unique brain analysis provides evidence that early and extensive amyloid removal may interrupt the biological cascade leading to Alzheimer’s disease.
It represents a step toward developing treatments that not only manage symptoms but also slow the underlying progression of one of the world’s most devastating neurodegenerative disorders.