Stopped: due to recent release reports from CDC about lung injury due to vaping, the PI and IRB decided to terminate the study
This aim will examine the acute and subacute exposures to electronic cigarette (EC) vapor generated from e-liquids without nicotine (NFEC) on life-time non smokers subjects by measuring changes in nasal ion transport and TGF-β levels. Nasal ion transport will be assessed by nasal potential difference (NPD). Tumor growth factor (TGF)-β levels (mRNA and protein by ELISA) will be assessed on nasal cells and lavages.
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changes on nasal potential difference (NPD) measurements
Timeframe: before and after 7 days of vapor