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Linking E-Cigarette Aerosol Characteristics to Mechanisms of Pulmonary Toxicity

Principal Investigators:  Yifang Zhu

Funding Mechanism: NIH Grant

ID number: 1R01HL139379-01A1

Award Date: 9/14/2018

Institution: University of California Los Angeles


The goal of this study is to understand how atomizer parameters and key ingredients in e-liquids contribute to undesirable aerosol characteristics and pulmonary toxicity. Study aims are: (1) to systematically vary e-cigarette device parameters (e.g., coil composition, coil resistance, applied voltage) and e-liquid components (propylene glycol, vegetable glycerin, nicotine, flavoring) to determine their impacts on aerosol physiochemical characteristics and in vitro toxicity; (2) to expose human airway epithelial cells to e-cigarette aerosols and determine toxicity signatures resulting from specific physiochemical features; and (3) to determine acute and sub-chronic lung toxicity profiles resulting from exposures to e-cigarette aerosols in mice. Findings may inform future regulatory activities related to e-cigarettes.