Association of rs505080 Single Nucleotide Polymorphism in Lamin-A Gene with Familial Dilated Cardiomyopathy in Iranian Population; A Case-Control Study

Background: Dilated cardiomyopathy (DCM) is among the most prevalent causes of heart failure and sudden cardiac death worldwide. Nuclear lamin protein coding genes are believed to have a definitive role in the DCM phenotype. The rs505058 thymine (T) to cytosine (C) polymorphism in the lamin-A gene is one of the most common mutations reported in familial DCM in previous studies. Objectives: We aimed to demonstrate the possible role of this SNP in the lamin A and C (LMNA) gene in the incidence of DCM among the south of Iran population. Methods: This case-control study included 65 patients with familial DCM and 70 healthy participants in south Iran. DNA was extracted from nucleated blood cells, and polymerase chain reaction (PCR) was performed. First, the sequence of the LMNA gene was investigated. Then the frequency of alleles C (mutated allele) and T (normal) of the LMNA gene (rs505058) was compared between the case and controls. Results: No notable differences were seen in gender and age between the case and controls. The genotype frequencies of the LMNA rs505058 T/C polymorphism were 6% (CC), 31% (CT), and 63% (TT) amongst cases, and 1% (CC), 13% (CT) and 86% (TT) in controls. For allele level comparison, the LMNA rs505058 C allele has been shown to have a statistically significant association with an enhancement in the risk of dilated cardiomyopathy (OR = 2.92; 95% CI = 1.05 to 8.15, P-value = 0.034) Conclusions: The results indicated that the rs505058 T/C SNP of the LMNA gene is associated with familial DCM patients in the Iranian population.