Early detection of Alzheimer’s is crucial because treatments are likely to be more effective before symptoms begin. A study published in Nature Communications describes a minimally invasive nasal swab that detects early biological changes associated with Alzheimer’s, offering a more direct view of living neural processes than existing blood tests.
In the procedure, clinicians apply a numbing spray and use a tiny brush guided into the upper nasal cavity where smell-detecting nerve cells reside. The swab collects living nerve and immune cells; researchers then profile gene activity in hundreds of thousands of individual cells to infer disease-related processes in the brain.
The team, led by Bradley J. Goldstein at Duke University School of Medicine with first author Vincent M. D’Anniballe, compared samples from 22 participants. They measured activity of thousands of genes across hundreds of thousands of cells, producing millions of data points. A combined nose tissue gene score separated early and clinical Alzheimer’s from healthy controls about 81% of the time, and the swab picked up early shifts including in people with laboratory signs but no symptoms.
The study notes practical implications: the method lets researchers study living neural tissue, which opens new possibilities for diagnosis and for tracking treatment effects over time. Duke, together with the Duke & UNC Alzheimer’s Disease Research Center, is expanding the research to larger groups. Duke has filed a US patent on the approach, and funding came from the National Institutes of Health.
- Samples compared: 22 participants
- Data: thousands of genes, hundreds of thousands of cells
- Separation accuracy: about 81% for early and clinical cases
Difficult words
- minimally invasive — Causes little damage or discomfort to body
- nasal swab — A sample taken from inside the nose
- neural — Related to nerves or the nervous system
- profile — Measure and record activity or features
- infer — Draw a conclusion from available evidence
- patent — Legal protection for an invention or method
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- What are the main benefits and potential challenges of using a nasal swab for early Alzheimer’s detection compared with blood tests?
- How could the ability to study living neural tissue affect research or monitoring of treatments over time?
- What ethical or practical issues should researchers consider before expanding this method to larger groups?
Related articles
Forest loss in tropics raises local heat and deaths
A study using satellite data found that tropical deforestation from 2001–2020 exposed 345 million people to local warming and likely caused about 28,000 heat-related deaths per year, mainly in Africa, Southeast Asia and Latin America.
