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Hydroxyl Radicals in E-Cigarette Vapor and E-Vapor Oxidative Potentials under Different Vaping Patterns
Yeongkwon Son1,2, Vladimir Mishin3, Jeffrey D Laskin3,4
1Department of Environmental and Occupational Health, School of Public Health , Rutgers University , Piscataway , New Jersey 08854 , United States.
Chemical Research in Toxicology
|April 13, 2019
Summary
E-cigarette vaping generates hydroxyl radical (•OH), a harmful reactive oxygen species (ROS). Higher power and flavored e-liquids increase •OH exposure, potentially leading to respiratory issues like asthma.
Area of Science:
- Environmental Health
- Toxicology
- Respiratory Medicine
Background:
- E-cigarette vaping is linked to oxidative stress.
- Reactive oxygen species (ROS) formation in e-vapor is a potential mechanism.
- Hydroxyl radical (•OH) is a highly destructive ROS.
Purpose of the Study:
- To quantify hydroxyl radical (•OH) formation in e-vapor.
- To investigate the impact of vaping parameters on •OH generation.
- To assess potential health risks associated with e-cigarette use.
Main Methods:
- Measurement of •OH formation in e-vapor across various vaping patterns.
- Varying power settings, solvent concentrations (VG vs. PG), and flavorings.
- Assessment of e-vapor interaction with ascorbic acid.
Main Results:
- Increased power output and puff volume significantly elevated •OH formation.
- Vegetable glycerin (VG) and flavored e-liquids produced higher •OH levels.
- Daily •OH dose from vaping can rival cigarette smoking depending on usage patterns.
Conclusions:
- Vaping parameters like high power and flavored VG e-liquids increase •OH exposure.
- This elevated exposure may heighten risks for conditions such as asthma and COPD.
- Further research is warranted to fully understand e-cigarette health impacts.
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