Gene discovery for high-density lipoprotein cholesterol level change over time in prospective family studies

Mary F. Feitosa, Kathryn L. Lunetta, Lihua Wang, Mary K. Wojczynski, Candace M. Kammerer, Thomas Perls, Nicole Schupf, Kaare Christensen, Joanne M. Murabito, Michael A. Province

Research output: Contribution to journalArticle

Abstract

Backgrounds and aims: Several genes are known to contribute to the levels and metabolism of HDL-C, however, their protective effects in cardiovascular disease (CVD), healthy aging, and longevity are complex and poorly understood. It is also unclear if these genes predict longitudinal HDL-C change. We aimed to identify loci influencing HDL-C change. Methods: We performed a genome-wide association study (GWAS) with harmonized HDL-C and imputed genotype in three family-based studies recruited for exceptional survival (Long Life Family Study), from community-based (Framingham Heart Study) and enriched for CVD (Family Heart Study). In 7738 individuals with at least 2 visits, we employed a growth curve model to estimate the random linear trajectory parameter of age-sex-adjusted HDL-C for each person. GWAS was performed using a linear regression model on HDL-C change accounting for kinship correlations, population structure, and differences among studies. Results: We identified a novel association for HDL-C with GRID1 (p = 5.43 × 10−10), which encodes a glutamate receptor channel subunit involved in synaptic plasticity. Seven suggestive novel loci (p < 1.0 × 10−6; MBOAT2, LINC01876-NR4A2, NTNG2, CYSLTR2, SYNE2, CTXND1-LINC01314, and CYYR1) and a known lipid gene (ABCA10) showed associations with HDL-C change. Two additional sex-specific suggestive loci were identified in women (DCLK2 and KCNJ2). Several of these genetic variants are associated with lipid-related conditions influencing cardiovascular and metabolic health, have predictive regulatory function, and are involved in lipid-related pathways. Conclusions: Modeling longitudinal HDL-C in prospective studies, with differences in healthy aging, longevity and CVD risk, contributed to gene discovery and provided insights into mechanisms of HDL-C regulation.

Original languageEnglish
Pages (from-to)102-110
Number of pages9
JournalAtherosclerosis
Volume297
DOIs
StatePublished - Mar 2020

Keywords

  • GWAS
  • HDL-C metabolism
  • Healthy aging
  • Longevity
  • Longitudinal HDL-C change

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