Cited by 397Epigenetics and DNA MethylationLiver Disease Diagnosis and TreatmentLiver physiology and pathology

Relationship Between Methylome and Transcriptome in Patients With Nonalcoholic Fatty Liver Disease

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Murphy, Susan K., Yang, Hyuna, Moylan, Cynthia A., Pang, Herbert, Dellinger, Andrew, Abdelmalek, Manal F., Garrett, Melanie E., Ashley–Koch, Allison +4 more·2013·Gastroenterology

Abstract

Background & aims Cirrhosis and liver cancer are potential outcomes of advanced nonalcoholic fatty liver disease (NAFLD). It is not clear what factors determine whether patients will develop advanced or mild NAFLD, limiting noninvasive diagnosis and treatment before clinical sequelae emerge. We investigated whether DNA methylation profiles can distinguish patients with mild disease from those with advanced NAFLD, and how these patterns are functionally related to hepatic gene expression.Methods We collected frozen liver biopsies and clinical data from patients with biopsy-proven NAFLD (56 in the discovery cohort and 34 in the replication cohort). Samples were divided into groups based on histologic severity of fibrosis: F0-1 (mild) and F3-4 (advanced). DNA methylation profiles were determined and coupled with gene expression data from the same biopsies; differential methylation was validated in subsets of the discovery and replication cohorts. We then analyzed interactions between the methylome and transcriptome.Results Clinical features did not differ between patients known to have mild or advanced fibrosis based on biopsy analysis. There were 69,247 differentially methylated CpG sites (76% hypomethylated, 24% hypermethylated) in patients with advanced vs mild NAFLD (P < .05). Methylation at fibroblast growth factor receptor 2, methionine adenosyl methyltransferase 1A, and caspase 1 was validated by bisulfite pyrosequencing and the findings were reproduced in the replication cohort. Methylation correlated with gene transcript levels for 7% of differentially methylated CpG sites, indicating that differential methylation contributes to differences in expression. In samples with advanced NAFLD, many tissue repair genes were hypomethylated and overexpressed, and genes in certain metabolic pathways, including 1-carbon metabolism, were hypermethylated and underexpressed.Conclusions Functionally relevant differences in methylation can distinguish patients with advanced vs mild NAFLD. Altered methylation of genes that regulate processes such as steatohepatitis, fibrosis, and carcinogenesis indicate the role of DNA methylation in progression of NAFLD.

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Crossref · 10.1053/j.gastro.2013.07.047

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  • DNA methylation patterns at fibrosis-related genes such as TGFβ1, COL1A1, PDGFα, PPARα, and PPARδ can distinguish mild from advanced MASLD and predict future fibrosis progression.

    “Moreover, certain patterns of DNA methylation at fibrosis-related genes, such as those encoding TGFβ1, COL1A1, PDGFα, peroxisome proliferator-activated receptor alpha (PPARα), and peroxisome proliferator-activated receptor delta (PPARδ), can not only distinguish between patients with mild versus advanced MASLD, but also predict future fibrosis progression (169-172).”

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  1. [10]Moylan CA Pang H Dellinger A Hepatic gene expression profiles differentiate pre-symptomatic NAFLD patients with high versus low risk for liver related mortality Hepatology 2013 in press

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Authors
Murphy, S. K., Yang, H., Moylan, C. A., Pang, H., Dellinger, A., Abdelmalek, M. F., Garrett, M. E., Ashley–Koch, A., Suzuki, A., Tillmann, H. L., Hauser, M. A., & Diehl, A. M.
Affiliations
Duke University (US)
Corresponding author
Diehl, Anna Mae
Venue
Gastroenterology
Publisher
Elsevier BV
Published
2013-11
Volume
145
Issue
5
Pages
1076-1087
ISSN
0016-5085 (ISSN-L)
OpenAlex
W2150020322
Cited by
391
References
48
Citations by year
2026: 14 · 2025: 23 · 2024: 36 · 2023: 37 · 2022: 31 · 2021: 35 · 2020: 31 · 2019: 38 · 2018: 40 · 2017: 32 · 2016: 26 · 2015: 28 · 2014: 17 · 2013: 2 · 2012: 1
FWCI
10.89
Type
journal article
Language
en
Open access
Locations
  • Gastroenterology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • The HKU Scholars Hub (University of Hong Kong) (submittedVersion)
Funders
  • National Institutes of Health (5rc2aa019399-02)
  • National Institute on Alcohol Abuse and Alcoholism (5RC2-AA019399, RC2-AA019399)
  • National Institute of Diabetes and Digestive and Kidney Diseases (T32DK007568)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
Keywords
non-alcoholic fatty liver disease, DNA methylation, transcriptome, liver fibrosis, disease severity, differentially methylated CpG sites, gene expression, FGF2, MAT1A, caspase-1, one-carbon metabolism, NAFLD progression, non-invasive diagnosis
MeSH terms
Adult, Biopsy, Diagnosis, Differential, Fatty Liver, Female, Gene Expression Regulation, Humans, Liver, Male, Methionine Adenosyltransferase, Middle Aged, Severity of Illness Index, Cohort Studies, Disease Progression, CpG Islands, DNA Methylation, Caspase 1, Receptor, Fibroblast Growth Factor, Type 2, Transcriptome, Non-alcoholic Fatty Liver Disease

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