# Impact of genetic markers related to hyper-HDL cholesterol on the prevalence of myocardial infarction: a KoGES study

## TL;DR

This study explores how genetic markers linked to high HDL cholesterol affect heart attack risk, revealing some genes that increase risk despite high HDL levels.

## Contribution

Identifies specific SNPs associated with increased MI risk in individuals with hyper-HDL cholesterol.

## Key findings

- Six SNPs were significantly related to both hypo- and hyper-HDL groups.
- Three SNPs were associated with MI prevalence in the hyper-HDL group.
- One SNP showed a more than six-fold increase in MI risk in the hyper-HDL group.

## Abstract

Recent studies have shown that hyper-high-density lipoprotein cholesterol (HDL-C) is associated with cardiovascular disease risk and all-cause mortality, a phenomenon known as the HDL-C paradox. Several genes have been reported to show relationships between increased HDL-C and myocardial infarction (MI) risk. We investigated the genetic predisposition of lipid metabolism influencing MI. The study dataset was from the Korean Genome and Epidemiology cohort obtained from the National Biobank of Korea, with an initial population of 68,806 individuals. We categorized samples based on HDL-C levels into hypo-HDL-C (n = 25,884), normal-HDL-C (n = 41,117), and hyper-HDL-C groups (n = 1,805). We conducted genome-wide association studies for each group and the total sample. Significant associations were defined using genome-wide significant level and suggestive level. The lead SNP of each locus was selected for further interpretation. This analysis included 2,014 (2.6%) MI patients. Using multivariable logistic regression, we evaluated the association of 7,877 SNPs in nine loci. We identified six SNPs significantly related to both hypo- and hyper-HDL groups, one SNP associated with hyper-HDL, and six SNPs associated with hypo-HDL group. Additionally, we found three SNPs associated with MI prevalence in the hyper-HDL group, including one significant SNP and two suggestive SNPs. Contrary to the traditional view of HDL-C as protective, this study identified genetic variants that increase MI risk by more than six-fold. These SNPs could play a role as important markers for detecting MI in hyper-HDL cholesterol group.