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Related Experiment Video

Updated: Nov 8, 2025

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
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Genetic Epidemiology of Complex Phenotypes.

Darren D O'Rielly1, Proton Rahman2

  • 1Molecular Genetics Laboratory, Eastern Health, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada. Darren.orielly@med.mun.ca.

Methods in Molecular Biology (Clifton, N.J.)
|April 19, 2021
PubMed
Summary

Genetic and environmental factors influence complex diseases. Genetic epidemiology integrates genetics and epidemiology to identify disease-related genes and variants using large-scale association studies.

Keywords:
Association studiesGenetic epidemiologyGenotypingHeritability studiesLinkage disequilibriumLinkage studiesNext-generation sequencingWhole-genome-wide association scans

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Area of Science:

  • Genetics and Epidemiology
  • Public Health Research

Background:

  • Complex diseases arise from interactions between genetic and environmental factors.
  • Genetics significantly impacts disease susceptibility, prognosis, and treatment.
  • Advancements in genetic variant characterization and genotyping enable gene identification.

Purpose of the Study:

  • To review methods for assessing the genetic burden of complex diseases.
  • To explore techniques for identifying genes and genetic variants associated with complex diseases.
  • To highlight epidemiological considerations and clinical applications in genetic research.

Main Methods:

  • Large-scale association studies integrating genetic and epidemiological principles.
  • Shift from traditional linkage analysis to genetic association-based methods.
  • Application of epidemiological methods in genetic investigations.

Main Results:

  • Multiple genes and genetic variants have been identified for common complex diseases.
  • Large-scale association studies are currently the most efficient method for gene identification.
  • Integration of genetics and epidemiology has formed the discipline of genetic epidemiology.

Conclusions:

  • Genetic epidemiology provides a framework for understanding the genetic basis of complex diseases.
  • Epidemiological approaches are crucial for guiding gene identification and clinical applications.
  • Continued integration of genetic and epidemiological methods will advance public health research.