MedicalResearch.com: What is the background for this study? What are the main findings?
Response: In our study, we studied endothelial cells, the cells that line the inside of the blood vessels. We collected endothelial cells from smokers both who use menthol and non-menthol cigarettes are impaired compared to non-smokers and we could make the non-smoker cells look like the endothelial cells of smokers by treating with menthol or eugenol (provides a clove spice-flavoring).
To test a wider variety of commonly used flavoring additives, we treated cultured (outside of the body in a dish) endothelial cells with some of the most commonly used flavoring additives in tobacco products and at different concentrations/doses. We then evaluated the effects of flavoring additives by looking at measures of cell death, oxidative stress, inflammation, and the ability of the cells to produce nitric oxide, a cardio-protective chemical made by endothelial cells that is lost when the cells become damaged.
We found that the flavoring additives used in tobacco products like e-cigarettes are toxic to the cells that line the blood vessels (endothelial cells). Our works suggests that the flavoring additives used in tobacco products may be harmful to the cardiovascular system.