Genotoxic effects and oxidative stress induced by organic extracts of particulate matter (PM10) collected from a subway tunnel in Seoul, Korea

► Organic extract of subway PM10 induces DNA breakage and MN formation in BEAS-2B cells. ► ROS induced by organic extract of subway PM10 stimulates genotoxic effects. ► PAHs contained in organic extract of subway PM10 may be involved in toxic effects.