Long-term exposure to air pollution has been shown to accelerate the ageing process in the body. Research demonstrates that particulate matter and other harmful substances in the air stimulate inflammation and thereby contribute to age-related diseases such as dementia. This happens because these pollutants damage cells and put the immune system under pressure.
Scientists measure biological age through epigenetic clocks, among other things, a type of internal clock that records changes in DNA as we age. People who are more frequently exposed to polluted air show higher biological ages than their actual chronological age. This means their bodies show signs of ageing more quickly.
An important role appears to be reserved for senescent cells. These are damaged cells that no longer function properly and accumulate as we age. They contribute to tissue ageing and chronic inflammation. Exposure to air pollution increases the number of these cells, which points to accelerated ageing.
This research underlines the importance of clean air for a healthy lifespan. By reducing the harmful effects of polluted air, we can limit the risk of age-related disorders and promote healthy ageing for longer.
Source: Reason
