Air pollution-linked blood changes detected years before lung cancer diagnosis

A new study published in Nature Communications has discovered alterations in the blood of individuals exposed to air pollution, detectable years before they are diagnosed with lung cancer. This finding, led by researchers from the American Cancer Society and Emory University's Rollins School of Public Health, provides valuable insights for future cancer research, detection, and prevention strategies.

Air pollution has long been known to contribute to lung cancer development, but the specific biological changes occurring in the body are not as well understood. The researchers analyzed blood samples from 1,357 cancer-free participants and found disruptions in metabolites associated with inflammation, oxidative stress, detoxification, and energy metabolism, all of which are linked to an increased risk of lung cancer.

These changes could potentially serve as biomarkers to identify individuals at higher risk of lung cancer, aiding in the development of prevention-focused public health strategies. The study emphasizes the importance of exploring non-smoking-related risk factors, such as air pollution, in cancer prevention efforts. Although lung cancer remains the leading cause of cancer deaths in the U.S., regular screening recommendations are limited to individuals with a history of tobacco smoking.

Identifying measurable blood-based changes associated with air pollution exposure could help pinpoint more people at risk and potentially shape future prevention and screening approaches.