Air Pollution Raises Risk and Worsens Outcomes of Motor Neurone Disease

In this study, researchers followed 1,463 patients newly diagnosed with motor neurone disease and compared them with more than 7,300 population controls and nearly 1,800 siblings, using detailed residential data and high-resolution pollution models covering up to 10 years. They found that higher exposure to fine and coarse particulate matter (PM2.5, PM2.5-10, PM10) and nitrogen dioxide (NO₂) was consistently linked to an increased risk of the disease, particularly with longer-term, cumulative exposure.

The study also showed that patients who had experienced higher pollution levels before diagnosis tended to have worse outcomes. These individuals faced a higher risk of death, were more likely to require invasive ventilation, and showed faster declines in motor and respiratory function. The authors suggest that their large sample size, detailed exposure data, and repeated clinical assessments may help explain why the findings are more consistent than earlier, smaller studies that had mixed results.

While the precise biological mechanisms remain uncertain, researchers suggest that air pollution may interact with an individual’s genetic susceptibility to motor neurone disease through processes such as oxidative stress and neuroinflammation.

To read how research from the United States has shown that high-dose B vitamins can completely offset the damage caused by exposure to fine particulate matter of the type produced by burning fossil fuels in motor vehicles – the most dangerous type of air pollution – see this article on our website.