Association between Uncoupling Protein 2 Gene Ala55val Polymorphism and Sudden Sensorineural Hearing Loss

Area of Science:

• Genetics
• Otolaryngology
• Molecular Biology

Background:

• The underlying causes of sudden sensorineural hearing loss (sudden deafness, SD) are not fully understood.
• Mitochondrial dysfunction is implicated in various cellular processes, but its role in SD requires further investigation.

Purpose of the Study:

• To examine the potential association between a specific mitochondrial uncoupling protein 2 (UCP2) gene polymorphism (rs660339) and the risk of developing sudden deafness.
• To contribute to understanding the genetic factors influencing sudden sensorineural hearing loss.

Main Methods:

• A case-control study comparing 83 patients with sudden deafness to 2048 control individuals from the Longitudinal Study of Aging.
• Logistic regression analysis was employed to determine the odds ratios (ORs) for sudden deafness associated with the UCP2 (rs660339) polymorphism.

Main Results:

• The UCP2 (rs660339) polymorphism demonstrated a statistically significant association with an increased risk of sudden deafness under an additive inheritance model.
• An odds ratio of 1.468 (95% CI: 1.056–2.040) was observed after adjusting for confounding factors including age, sex, diabetes, dyslipidemia, and hypertension.

Conclusions:

• The findings suggest that the UCP2 (rs660339) polymorphism is a significant risk factor for the development of sudden deafness.
• This genetic marker may play a role in the etiology of sudden sensorineural hearing loss.