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Application of Unsupervised Multi-Omic Factor Analysis to Uncover Patterns of Variation and Molecular Processes Linked to Cardiovascular Disease
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Application of Unsupervised Multi-Omic Factor Analysis to Uncover Patterns of Variation and Molecular Processes Linked to Cardiovascular Disease

Published on: September 20, 2024

Genetic analysis of common factors underlying cardiovascular disease-related traits

Xiao-Qing Liu1, Anthony J G Hanley, Andrew D Paterson

  • 1Program in Genetics and Genomic Biology, The Hospital for Sick Children, Toronto, Ontario, Canada. xliu@sickkids.ca

BMC Genetics
|February 21, 2004
PubMed

Insights

Researchers identified shared genetic factors influencing cardiovascular disease traits. A specific locus on chromosome 2 showed a pleiotropic effect on total cholesterol and triglycerides, suggesting a common genetic basis.

Area of Science:

  • Genetics
  • Cardiovascular Disease Research
  • Statistical Genetics

Background:

  • Cardiovascular disease (CVD) risk factors like BMI, SBP, TG, TC, HDL, and GLUC are intercorrelated.
  • The Framingham Heart Study provided cross-sectional data from 330 families for this investigation.
  • Underlying common factors influencing these correlated traits were hypothesized.

Purpose of the Study:

  • To identify common underlying factors for correlated CVD risk traits.
  • To investigate the genetic structures of these identified factors.
  • To explore potential pleiotropic genetic effects on multiple CVD-related traits.

Main Methods:

  • Principal component factor analysis was employed to derive latent factors from six CVD-related traits.
  • Variance components linkage analysis was utilized to analyze the genetic structures of these factors.
  • Linkage analysis compared factor-based results with component trait results.

Main Results:

  • Three major factors emerged: BMI-SBP-GLUC (heritability 32%), HDL-TG (heritability 45%), and TC-TG (heritability 49%).
  • A significant linkage was detected for the TC-TG factor on chromosome 2p23 (LOD scores 2.73 two-point, 1.81 multipoint).
  • This linkage signal for the TC-TG factor surpassed the LOD scores for individual TC and TG in the same region.

Conclusions:

  • A specific locus on chromosome 2 may exert a pleiotropic effect on both total cholesterol (TC) and triglycerides (TG).
  • This finding suggests a shared genetic basis influencing multiple lipid-related cardiovascular risk factors.
Abstract

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