If you drive, it’s likely that your car’s tires are doing more than just wearing down; they might also be affecting our brains.
Recent research from a team in China has uncovered a troubling connection between a chemical commonly found in tires and the risk of Alzheimer’s disease. This chemical, known as 6PPD-Q, forms when tiny tire particles interact with ozone. This can occur whenever fresh bits of tire are exposed to air, which means it’s likely present in many car-dense areas.
The study, published in the journal Open Medicine, indicates that when this ozone-treated chemical interacts with brain cells, it can lead to oxidative stress and inflammation. Essentially, this results in wear and tear, as well as hampering how well cells communicate with each other. These effects are closely linked to the early stages of Alzheimer’s, hinting that people who frequently come into contact with rubber tires might be unintentionally exposing themselves to harmful substances for their brain health.
This is quite concerning for those in car-centric places like North America, which includes a large segment of the population.
The chemical enters the brain through the bloodstream, primarily when we inhale dust containing 6PPD-Q. Other potential exposure routes are through soil, crops, synthetic turf in stadiums, working in proximity to highways or vehicles, and coming into contact with products made from recycled tires.
While scientists were aware that 6PPD-Q interacts with the brain, establishing its specific link to Alzheimer’s is noteworthy. Using machine learning, the research team explored how well the chemical binds to five genes associated with Alzheimer’s, discovering that it forms strong connections with three of them.
Moreover, 6PPD-Q runoff isn’t just a concern for humans; it significantly affects fish populations, particularly salmon. A 2022 study examined how road runoff interacts with the environment and referred to this substance as a “highly toxic tire-derived chemical,” which has been implicated in “mass mortalities of coho salmon.”
Moving forward, more extensive lab research on human cells is necessary to understand the extent to which varying levels of 6PPD-Q contribute to Alzheimer’s disease. Only then will we have a clearer picture of the risks associated with these tire emissions.
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