Cited by 27Epigenetics and DNA MethylationGenetic Associations and EpidemiologyHealth, Environment, Cognitive Aging

The influences of genetic and environmental factors on methylome-wide association studies for human diseases

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Sun, Yan V.·2014·Current Genetic Medicine Reports

Abstract

DNA methylation (DNAm) is an essential epigenetic mechanism for normal development, and its variation may be associated with diseases. High-throughput technology allows robust measurement of DNA methylome in population studies. Methylome-wide association studies (MWAS) scan DNA methylome to detect new epigenetic loci affecting disease susceptibility. MWAS is an emerging approach to unraveling the mechanism linking genetics, environment, and human diseases. Here I review the recent studies of genetic determinants and environmental modifiers of DNAm, and the concept for partitioning genetic and environmental contribution to DNAm. These studies establish the correlation maps between genome and methylome, and enable the interpretation of epigenetic association with disease traits. Recent findings suggested that MWAS was a promising genomic method to identify epigenetic predictors accounting for unexplained disease risk. However, new study designs, analytical methods and shared resources need to be implemented to address the limitations and challenges in future epigenomic epidemiologic studies.

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  • Epigenetic modifications are shaped by environmental exposures such as smoking and poor nutrition, by genetic factors, and by age.

    “Epigenetic modifications are shaped by environmental (e.g. smoking (Breitling, Yang, Korn, Burwinkel, & Brenner, 2011; Shenker et al.; Sun, 2014; Sun, Smith, et al., 2013), poor nutrition(Waterland & Jirtle, 2003), genetic factors (Sun, 2014; D. Zhang et al., 2010), and age – all well known risk factors human diseases”
  • Some blood-based omic markers show associations similar to those in other tissues, such as smoking-related DNA methylation.

    “There are reports showing that some blood-based omic makers share similar association as in other tissues (e.g. smoking-related DNA methylation (Sun, 2014))”
  • Many meQTL studies prioritized local genetic associations with DNA methylation sites, which typically had larger effects and required fewer pairwise tests than trans-meQTL analysis.

    “Many meQTL studies prioritized on the local genetic associations with DNA methylation sites (i.e. cis-meQTLs), which typically had larger effects and required less number of pair-wise tests than the trans-meQTL analysis (Sun, 2014).”

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  1. [36]Allis CD Epigenetics 2007 CSHL Press

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Authors
Sun, Y. V.
Affiliations
Emory University (US)
Corresponding author
Sun, Yan V.
Venue
Current Genetic Medicine Reports
Published
2014-09-25
Volume
2
Issue
4
Pages
261-270
ISSN
2167-4876 (ISSN-L)
OpenAlex
W2149631335
Cited by
27
References
91
Citations by year
2026: 1 · 2025: 3 · 2024: 2 · 2023: 2 · 2022: 2 · 2021: 3 · 2020: 2 · 2019: 3 · 2016: 6 · 2015: 3
FWCI
1.23
Type
journal article
Language
en
Open access
Locations
  • Current Genetic Medicine Reports (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • American Heart Association (13GRNT17060002)
  • National Heart, Lung, and Blood Institute (HL100185, RC1HL100245, RC1HL100185)
  • National Institute of Environmental Health Sciences (P30ES019776, T32ES012870)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Health, Environment, Cognitive Aging
Keywords
DNA methylation, methylome-wide association study, environmental modifiers

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