A comparative assessment of e-cigarette aerosols and cigarette smoke on in vitro endothelial cell migration. (5th August 2017)

• Record Type: Journal Article
• Authors: Taylor, Mark; Jaunky, Tomasz; Hewitt, Katherine; Breheny, Damien; Lowe, Frazer; Fearon, Ian M.; Gaca, Marianna
• Is Part Of: Toxicology letters. Volume 277(2017)
• Page Start: 123
• Page End: 128
• Publication Date: 2017-08-05
• Subjects: Cigarette smoke -- E-cigarette -- Cardiovascular disease -- Endothelial migration -- Nicotine; Toxicology -- Periodicals; 363.179
• DOI: 10.1016/j.toxlet.2017.06.001
• Languages: English
• ISSNs: 0378-4274

Abstract

Highlights: Cigarette smoke exposure inhibits vascular wound healing by slowing the rate of endothelial migration. E-cigarette aerosol exposure does not inhibit endothelial migration. Nicotine does not inhibit endothelial migration. Abstract: Cigarette smoking is a risk factor for several diseases. There has been a steep increase in the use of e-cigarettes that may offer a safer alternative to cigarette smoking. In vitro models of smoking-related diseases may provide valuable insights into disease mechanisms associated with tobacco use and could be used to assess e-cigarettes. We previously reported the application of a 'scratch wound' assay, measuring endothelial cell migration rate following artificial wounding, in the presence or absence of cigarette smoke extracts. This study reports the comparative effects of two commercial e-cigarette products (Vype ePen and Vype eStick) and a scientific reference cigarette (3R4F) on endothelial migration in vitro . Puff-matched extracts were generated using the Health Canada Intense (HCI) regime for cigarettes and a modified HCI for e-cigarettes. Exposure to 3R4F extract (20 h) induced concentration-dependent inhibition of endothelial cell migration, with complete inhibition at concentrations >20%. E-cigarette extracts did not inhibit migration, even at double the 3R4F extract nicotine concentration, allowing cells to migrate into the wounded area. Our data demonstrate that e-cigarettes do not induce the inhibition of endothelial cell migration in vitro when compared to 3R4F. The scratch wound assay enables the comparative assessment between tobacco and nicotine products in vitro.