Apolipoprotein AI is a protective factor for idiopathic sudden sensorineural hearing loss: a two-sample mendelian...

Area of Science:

• Cardiovascular research
• Otolaryngology
• Genetics

Background:

• Observational studies suggest a link between cardiometabolic factors and idiopathic sudden sensorineural hearing loss (ISSNHL).
• The causal relationship between these factors and ISSNHL remains uncertain.
• Cardiometabolic health is crucial for overall well-being, including auditory function.

Purpose of the Study:

• To investigate the potential causal effect of cardiometabolic factors on the risk of developing ISSNHL.
• To utilize a robust Mendelian randomization approach to assess causality.
• To identify specific cardiometabolic factors that may influence ISSNHL risk.

Main Methods:

• A two-sample Mendelian randomization (MR) study design was employed.
• Summary-level data from genome-wide association studies (GWAS) were utilized.
• Genetic instruments for cardiometabolic factors were identified and associated with ISSNHL risk.

Main Results:

• Genetically predicted higher Apolipoprotein AI (ApoAI) levels were significantly associated with a decreased risk of ISSNHL (IVW OR = 0.82, P=0.03).
• No significant evidence of pleiotropy or heterogeneity was detected, supporting the validity of the findings.
• The results suggest a protective role of ApoAI in the context of ISSNHL.

Conclusions:

• This study provides evidence for a potential causal relationship where higher ApoAI levels are linked to a reduced risk of ISSNHL.
• The findings highlight ApoAI as a potential protective factor against sudden hearing loss.
• Further research is needed to understand the biological mechanisms underlying this association.