Associations of primary and secondary organic aerosols with airway and systemic inflammation in an elderly panel cohort.
Exposure-response information about particulate air-pollution constituents is needed to protect sensitive populations. Particulate matter 2.5 mm (PM2.5) components may induce oxidative stress through reactive-oxygen-species generation, including primary organics from combustion sources and secondary organics from photochemically oxidized volatile organic compounds. We evaluated differences in airway versus systemic inflammatory responses to primary versus secondary organic particle components, particle size fractions, and the potential of particles to induce cellular production of reactive oxygen species.
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