ABCA1 gene promoter methylation and sudden cardiac death

Abstract

Aim. A study of the association of the methylation of the promoter of the ABCA1 gene with sudden cardiac death(SCD).Materials and methods. The study design is based on the case-control principle. The SCD group included 150 men (mean age (46.7 ± 9.2) years) who died of sudden cardiac death according to forensic medical examination data (the main pathological diagnoses are acute circulatory failure, acute coronary insufficiency). The control group included 150 men (mean age (42.6 ± 1.2) years) who died suddenly, but not due to cardiovascular pathology. DNA was isolated by phenol-chloroform extraction from myocardial tissue. The methylation status of the ABCA1 gene promoter was assessed by methyl-specific polymerase chain reaction. The results obtained were statistically processed in SPSS 16.0 using Pearson’s test and Fisher’s test with Yates’ correction for continuity. P < 0.05 was used as a level of significance.Results. Comparing the groups revealed statistically significant differences in the methylation status of the gene promoter (p = 0.015). In the SCD group, the proportion of individuals whose ABCA1 gene promoter is methylated is statistically significantly higher compared to the control group (p = 0.020; OR = 5.86; 95% CI (1.28–26.89)).Conclusion. Methylation of the promoter of the ABCA1 gene is associated with sudden cardiac death.

Keywords

• внезапная сердечная смерть
• метилирование
• abca1
• промотор