Blood metabolomic signatures linking air pollution to lung cancer in the Cancer Prevention Studies.

Eight circulating metabolites are linked to both air pollution exposure and lung cancer risk, with four mediating effects on particulate matter and ozone.

• Why it matters: Understanding the biological pathways connecting air pollution to lung cancer can improve risk assessment and identify targets for prevention, addressing a critical gap in environmental health research.
• What they did: A prospective nested case-control study analyzed over 1100 metabolites in pre-diagnostic plasma samples from 1357 participants, estimating residential air pollution levels at blood draw.
• The result: Findings reveal that specific metabolites related to inflammatory and oxidative processes partly mediate the pollution-lung cancer link, offering insights into underlying mechanisms and potential intervention points.