Genome-wide linkage analysis of carotid artery traits in exceptionally long-lived families.

Journal Article (Multicenter Study;Journal Article)

Background and aims

Atherosclerosis develops with age and is partially controlled by genetics. Research to date has identified common variants with small effects on atherosclerosis related traits. We aimed to use family-based genome-wide linkage analysis to identify chromosomal regions potentially harboring rare variants with larger effects for atherosclerosis related traits.

Methods

Participants included 2205 individuals from the Long Life Family Study (LLFS), which recruited families with exceptional longevity from Boston, New York, Pittsburgh, and Denmark. Participants underwent B-mode ultrasonography of the carotid arteries to measure intima-media thickness (IMT), inter-adventitial diameter (IAD), and plaque presence and severity. We conducted residual heritability and genome-wide linkage analyses adjusted for age, age2 , sex, and field center using pedigree-based maximum-likelihood methods in SOLAR.

Results

All carotid traits were significantly heritable with a range of 0.68 for IAD to 0.38 for IMT. We identified three chromosomal regions with linkage to IAD (3q13; max LOD 5.3), plaque severity (17q22-q23, max LOD 3.2), and plaque presence (17q24, max LOD 3.1). No common allelic variants within these linkage peaks were associated with the carotid artery traits.

Conclusions

We identified three chromosomal regions with evidence of linkage to carotid artery diameter and atherosclerotic plaque in exceptionally long-lived families. Since common allelic variants within our linkage peaks did not account for our findings, future follow-up resequencing of these regions in LLFS families should help advance our understanding of atherosclerosis, CVD, and healthy vascular aging.

Full Text

Duke Authors

Cited Authors

  • Kuipers, AL; Wojczynski, MK; Barinas-Mitchell, E; Minster, RL; Wang, L; Feitosa, MF; Kulminski, A; Thyagarajan, B; Lee, JH; Province, MA; Newman, AB; Zmuda, JM; Long-Life Family Study,

Published Date

  • December 2019

Published In

Volume / Issue

  • 291 /

Start / End Page

  • 19 - 26

PubMed ID

  • 31634740

Pubmed Central ID

  • 31634740

Electronic International Standard Serial Number (EISSN)

  • 1879-1484

International Standard Serial Number (ISSN)

  • 0021-9150

Digital Object Identifier (DOI)

  • 10.1016/j.atherosclerosis.2019.10.008

Language

  • eng