Emerging evidence links tire pollution to Alzheimer’s risk | EurekAlert!
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Researchers used machine learning to show how a common tire by-product could disrupt brain function.
A chemical called 6PPD-quinone (6PPD-Q), which forms when shaved-off tire particles come into contact with ozone, might interfere with inner workings of the brain cells, leading to Alzheimer's disease. Zhang and Zhang's new paper in de Gruyter Brill’s journal Open Medicine, “6PPD‑Quinone Exposure and Alzheimer’s Disease: Insights from Integrative Network Pharmacology, Transcriptomics, Machine Learning, and Molecular Docking,” is the first to systematically explore this link using data-driven computational methods.
Because 6PPD-Q has been detected in water, soil, and human biological samples, it is clear that people are regularly exposed to it through traffic pollution. It can cause cell damage and alter cellular proteins, both of which can raise the risk of Alzheimer’s disease. Studies show that it is toxic to fish and other water animals and can cross into the brains of mice, raising serious concerns that it may also affect human brain health.
The researchers used advanced computational methods, including machine learning, to map how 6PPD-Q interacts with the brain’s molecular machinery (genes, proteins and signals that control cellular functions). They identified the presence of five key genes as predictors of Alzheimer’s disease and found that 6PPD-Q binds strongly to three of these genes. This can cause oxidative stress (cellular wear and tear), inflammation, and disruption in communication between brain cells, which sets the stage for the development of Alzheimer's.
This study provides a theoretical framework for how 6PPD-Q causes brain damage, but it was primarily computational, using gene datasets and data from a small sample of brains from individuals with Alzheimer’s. Larger studies in the lab on cells and human tissue, as well as on animals, are needed to confirm its conclusions. Finally, epidemiological studies are required to determine how much our everyday exposure to 6PPD-Q raises the risk of Alzheimer's disease.
Despite these limitations, the researchers emphasize the significance of their findings, noting that their work “provides the first systematic characterization of the molecular mechanisms by which 6PPD-Q may contribute to Alzheimer’s disease pathogenesis”.
The paper can be found here: https://doi.org/10.1515/med-2026-1477.
Journal
Open Medicine
DOI
10.1515/med-2026-1477
Method of Research
Computational simulation/modeling
Subject of Research
People
Article Title
6PPD-quinone exposure and Alzheimer’s disease: insights from integrative network pharmacology, transcriptomics, machine learning, and molecular docking
Article Publication Date
24-Jun-2026
COI Statement
The authors declare no competing interests.
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Media Contact
Vassiliki Gortsas
De Gruyter Brill
vassiliki.gortsas@degruyterbrill.com
More on this News Release
Emerging evidence links tire pollution to Alzheimer’s risk
De Gruyter Brill
Journal<br>Open Medicine
DOI<br>10.1515/med-2026-1477
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