Modification of the Peripheral Olfactory System by Electronic Cigarettes.

Area of Science:

• Physiology
• Toxicology
• Neuroscience

Background:

• Electronic cigarettes (e-cigs) are widely used globally.
• E-liquids contain flavorants, propylene glycol, and vegetable glycerin, with or without nicotine.
• Chemosensory systems detect these constituents, influencing vaping behavior.

Purpose of the Study:

• To explore the olfactory system's role in e-cig flavor perception.
• To examine the impact of e-cig aerosol components on the main olfactory epithelium (MOE).
• To understand how e-cig exposure may alter olfactory function and health.

Main Methods:

• Review of existing literature on e-cig constituents and olfactory perception.
• Discussion of MOE cell types and their functions.
• Analysis of olfactory detection of flavorants, nicotine, and toxicants.
• Examination of data on MOE modification by flavorants and toxicological impacts.

Main Results:

• Flavorants in e-cigs act as marketing tools, promoting e-cig use via sensory perception.
• E-cig aerosol contains irritants, toxicants, and heavy metals that can harm the MOE.
• Flavorant exposure and toxicants like formaldehyde, acrolein, and heavy metals can modify the MOE.

Conclusions:

• E-cig use significantly involves the olfactory system for flavor perception.
• Harmful substances in e-cig aerosol can adversely affect the olfactory epithelium.
• Alterations in the olfactory system due to e-cig exposure may impact health and vaping behavior.