Relationship between CYP11B2-344T>C polymorphsim and atrial fibrillation: A meta-analysis

Area of Science:

• Cardiovascular Genetics
• Molecular Cardiology
• Epidemiology

Background:

• The aldosterone synthase (CYP11B2) gene polymorphism at -344T>C has been implicated in atrial fibrillation (AF) risk.
• Previous studies on this association have yielded controversial and ambiguous results.
• Investigating this link is crucial for understanding AF pathogenesis.

Purpose of the Study:

• To conduct a meta-analysis of published case-control studies.
• To clarify the association between the CYP11B2 -344T>C polymorphism and AF susceptibility.
• To evaluate the risk in different genetic models and populations.

Main Methods:

• Systematic electronic searches of multiple databases were performed.
• Nine relevant case-control studies were included in the meta-analysis.
• Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using fixed and random effect models.

Main Results:

• The C allele of the CYP11B2 -344T>C polymorphism was significantly associated with increased AF risk in hypertensive populations (OR=1.26; 95% CI=1.09-1.45).
• Consistent results were observed for homozygous, dominant, and recessive genetic models.
• Significant associations were found across all examined genetic models within the hypertension subgroup.

Conclusions:

• The pooled data indicate a significant association between the CYP11B2 -344T>C polymorphism and AF susceptibility.
• This association is particularly evident in populations with hypertension.
• Further research may elucidate the precise mechanisms linking this genetic variant to AF.