The Association Between Matrix Metalloproteinase-1, -2, -3, -9, and -12 Gene Polymorphisms and Atrial Fibrillation

Area of Science:

• Cardiology
• Genetics
• Molecular Biology

Background:

• Atrial fibrillation (AF) is a common arrhythmia linked to significant health issues.
• Myocardial fibrosis in the left atrium is a key factor in AF development.
• Matrix metalloproteinases (MMPs) influence extracellular matrix remodeling and may promote atrial fibrosis via genetic variations.

Purpose of the Study:

• To investigate the association between genetic variations in MMP genes and AF susceptibility.
• To analyze the impact of single-nucleotide polymorphisms (SNPs), haplotypes, and gene-gene interactions on AF risk.
• To explore the role of MMP gene polymorphisms in the pathogenesis of atrial fibrillation.

Main Methods:

• A case-control study involving 179 AF patients and 56 controls.
• Analysis of eight polymorphisms across five MMP genes (MMP1, MMP2, MMP3, MMP9, MMP12) using PCR-based methods.
• Statistical analyses including univariate, multivariable logistic regression, haplotype analysis, and multifactor dimensionality reduction.

Main Results:

• Univariate analysis showed no significant allele frequency differences between AF patients and controls.
• Multivariable analysis identified significant associations for MMP1 rs1799750 and MMP2 rs243864 under recessive models.
• Haplotype analysis revealed a global association with AF (p=0.027), and gene-gene interactions were significant, particularly involving MMP1, MMP2, MMP3, and MMP12 SNPs.

Conclusions:

• Genetic variations in MMP genes contribute to AF susceptibility.
• A polygenic model involving extracellular matrix remodeling pathways is supported for AF.
• Multi-locus genetic analyses are crucial for understanding AF pathogenesis and identifying at-risk individuals.