• Pak J Med Sci · Mar 2020

    Higher DNA methylation of ABO gene promoter is associated with acute myocardial infarction in a hospital-based population in Karachi.

    • Farzana Abubakar Yousuf, Khawar Kazmi, Junaid Iqbal, Nikhat Ahmed, and Mohammad Perwaiz Iqbal.
    • Farzana Abubakar Yousuf, Department of Biological and Biomedical Sciences, Aga Khan University, Karachi 74800, Pakistan.
    • Pak J Med Sci. 2020 Mar 1; 36 (3): 505-510.

    ObjectiveTo find out if there is any relationship of methylation status of ABO gene promoter with the risk of acute myocardial infarction (AMI) in a hospital-based Pakistani population in Karachi, Pakistan.MethodsA case control study comprising of 39 adult AMI patients (both males and females; age range 30-70 years) and 39 normal healthy controls (both males and females and similar age range) nested in a large study (to see the relationship of ABO genotypes with AMI) was designed to investigate the methylation status of ABO gene promoter and its association with AMI. The study was carried out at the Aga Khan University, Karachi during July 2018 to June 2019. DNA isolated from samples of AMI patients and normal healthy controls were converted into bisulphite DNA using a kit method. Methylation specific polymerase chain reaction was carried out to determine the methylation status of ABO gene promoter in both cases and controls. Logistic regression was used to find out any association between increased methylation status of ABO gene promoter and risk of AMI.ResultsA significantly higher percentage of DNA methylation of the ABO gene promoter was observed in AMI patients as compared to normal healthy controls (82.1% vs. 35.9%; p value <0.001). This higher methylation status of ABO gene promoter was associated with AMI and the odds of AMI in this population were more than 6-fold in subjects with methylated gene promoter compared to those with unmethylated gene promoter after adjusting with age and waist circumference [AOR (95% CI) = 6.27 (1.76-22.3); p value = 0.005].ConclusionThe ABO gene promoter's hypermethylation appears to be increasing the risk of AMI in a hospital-based Pakistani population in Karachi, Pakistan.Copyright: © Pakistan Journal of Medical Sciences.

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