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  1. Research

Oxidant Exposure and Related Harm from Tobacco Smoke

Principal Investigator(s): John Richie

Funding Mechanism: NIH Grant

ID number: 1R01HL147344-01

Award Date: May 21, 2019

Institution: Pennsylvania State University

Oxidants are a major class of toxicant in tobacco smoke and likely play a critical role in the development of tobacco-related diseases including chronic obstructive pulmonary disease (COPD), cardiovascular disease (CVD), and cancer by causing oxidative stress/damage and inflammation. However, the specific oxidants most responsible remain unclear. The goals of this project are to identify specific oxidants responsible for tobacco-related harm and determine the impact of oxidant reduction on tobacco-related toxicity endpoints. Study aims are: (1): to determine the levels and identity of free radicals and other oxidants delivered by different combustible tobacco products/brands using advanced electron paramagnetic resonance (EPR) spectroscopy and liquid chromatography-tandem mass spectrometry (LC-MS/MS) methodologies; (2) to determine the impact of tobacco smoke oxidants on lung damage and inflammation, comparing effects of high vs. low oxidant brands and tobacco varieties, in mice; and (3) to determine the impact of charcoal filtration of cigarette smoke on oxidant-induced lung damage in mice. Findings will reveal new information on the toxicological importance of oxidant exposure.