Changes in Eustachian Tube Mucosa in Mice After Short-Term Tobacco and E-cigarette Smoke Exposure.
Laryngoscope
; 132(3): 648-654, 2022 03.
Article
in En
| MEDLINE
| ID: mdl-34599608
ABSTRACT
OBJECTIVES:
To evaluate histologic changes in middle ear and eustachian tube (ET) mucosa of mice after exposure to tobacco or electronic cigarette (e-cigarette) smoke. To determine whether there were any mitigating effects of middle ear application of anti-IL-13 or the epidermal growth factor receptor antagonist AG1478 on noted changes within ET mucosa. STUDYDESIGN:
Controlled animal study.METHODS:
Fifty BALB/cJ mice were randomly assigned to one of five groups A control group with no smoke exposure, two groups exposed to tobacco smoke, and two groups exposed to e-cigarette vapor. Within the exposed groups after 4 weeks of exposure, one ear was infiltrated with a saline hydrogel and the other ear with hydrogel of either Anti-IL-13 or AG1478. After four more weeks of exposure, the animals were euthanized and the ETs were evaluated for mucosal changes.RESULTS:
Compared to control animals with no smoke exposure, there were significant decreases in the numbers of goblet cells within the ET mucosa of mice exposed to tobacco smoke and e-cigarette vapor. No significant differences in cilia, mucin, or squamous metaplasia were noted. Neither anti-IL-13 nor AG178 significantly altered goblet cell count in the ET mucosa of mice exposed to tobacco smoke; however, both agents significantly increased goblet cells within the ET mucosa of mice exposed to e-cigarette vapor.CONCLUSION:
Short-term tobacco smoke and e-cigarette vapor significantly decrease goblet cell count in mouse ET mucosa. Middle ear application of both anti-IL-13 and AG1478 resulted in an increase in goblet cell count among mice exposed to e-cigarette vapor, but not to tobacco smoke. LEVEL OF EVIDENCE NA Laryngoscope, 132648-654, 2022.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Tobacco Smoke Pollution
/
Eustachian Tube
/
E-Cigarette Vapor
/
Mucous Membrane
Limits:
Animals
Language:
En
Journal:
Laryngoscope
Journal subject:
OTORRINOLARINGOLOGIA
Year:
2022
Document type:
Article
Affiliation country:
United States