Effects of gasoline and ethanol-gasoline exhaust exposure on human bronchial epithelial and natural killer cells in vitro.
Air pollution exposure, including passenger car emissions, may cause substantial respiratory health effects and cancer death. In western countries, the majority of passenger cars are driven by gasoline fuel. Recently, new motor technologies and ethanol fuels have been introduced to the market, but potential health effects have not been thoroughly investigated. We developed and verified a coculture model composed of bronchial epithelial cells (ECs) and natural killer cells (NKs) mimicking the human airways to compare toxic effects between pure gasoline (E0) and ethanol-gasoline-blend (E85, 85% ethanol, 15% gasoline) exhaust emitted from a flexfuel gasoline car. We drove a steady state cycle, exposed ECs for 6h and added NKs. We assessed exhaust effects in ECs alone and in cocultures by RT-PCR, flow cytometry, and oxidative stress assay. We found no toxic effects after exposure to E0 or E85 compared to air controls. Comparison between E0 and E85 exposure showed a weak association for less oxidative DNA damage after E85 exposure compared to E0. Our results indicate that short-term exposure to gasoline exhaust may have no major toxic effects in ECs and NKs and that ethanol as part of fuel for gasoline cars may be favorable.
['Roth|Michèle|M|', 'Usemann|Jakob|J|', 'Bisig|Christoph|C|', 'Comte|Pierre|P|', 'Czerwinski|Jan|J|', 'Mayer|Andreas C R|ACR|', 'Beier|Konstantin|K|', 'Rothen-Rutishauser|Barbara|B|', 'Latzin|Philipp|P|', 'Müller|Loretta|L|']
D000393:Air Pollutants D000397:Air Pollution D001980:Bronchi D018920:Coculture Techniques D004847:Epithelial Cells D000431:Ethanol D005742:Gasoline D006801:Humans D007694:Killer Cells, Natural D001335:Vehicle Emissions
Cocultures Airways Flexfuel DNA damage Gasoline exhaust Diesel exhaust particles Ethanol-gasoline blend