Cited by 1,480Epigenetics and DNA MethylationGenomics and Chromatin DynamicsGene expression and cancer classification

Critical evaluation of the Illumina MethylationEPIC BeadChip microarray for whole-genome DNA methylation profiling

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Pidsley, Ruth, Zotenko, Elena, Peters, Timothy J., Lawrence, Mitchell G., Risbridger, Gail P., Molloy, Peter, Van Djik, Susan, Muhlhausler, Beverly +2 more·2016·Genome biology

Abstract

BACKGROUND: In recent years the Illumina HumanMethylation450 (HM450) BeadChip has provided a user-friendly platform to profile DNA methylation in human samples. However, HM450 lacked coverage of distal regulatory elements. Illumina have now released the MethylationEPIC (EPIC) BeadChip, with new content specifically designed to target these regions. We have used HM450 and whole-genome bisulphite sequencing (WGBS) to perform a critical evaluation of the new EPIC array platform. RESULTS: EPIC covers over 850,000 CpG sites, including >90 % of the CpGs from the HM450 and an additional 413,743 CpGs. Even though the additional probes improve the coverage of regulatory elements, including 58 % of FANTOM5 enhancers, only 7 % distal and 27 % proximal ENCODE regulatory elements are represented. Detailed comparisons of regulatory elements from EPIC and WGBS show that a single EPIC probe is not always informative for those distal regulatory elements showing variable methylation across the region. However, overall data from the EPIC array at single loci are highly reproducible across technical and biological replicates and demonstrate high correlation with HM450 and WGBS data. We show that the HM450 and EPIC arrays distinguish differentially methylated probes, but the absolute agreement depends on the threshold set for each platform. Finally, we provide an annotated list of probes whose signal could be affected by cross-hybridisation or underlying genetic variation. CONCLUSION: The EPIC array is a significant improvement over the HM450 array, with increased genome coverage of regulatory regions and high reproducibility and reliability, providing a valuable tool for high-throughput human methylome analyses from diverse clinical samples.

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Authors
Pidsley, R., Zotenko, E., Peters, T. J., Lawrence, M. G., Risbridger, G. P., Molloy, P., Van Djik, S., Muhlhausler, B., Stirzaker, C., & Clark, S. J.
Affiliations
  • Garvan Institute of Medical Research (AU)
  • Monash University (AU)
  • Commonwealth Scientific and Industrial Research Organisation (AU)
Corresponding author
Clark, Susan J.
Venue
Genome biology
Published
2016-10-07
Volume
17
Issue
1
Pages
208-208
ISSN
  • 1465-6906 (ISSN-L)
  • 1474-760X
OpenAlex
W2529024004
Cited by
1,480
References
42
Citations by year
2026: 122 · 2025: 184 · 2024: 229 · 2023: 201 · 2022: 191 · 2021: 208 · 2020: 134 · 2019: 109 · 2018: 72 · 2017: 27 · 2014: 1 · 2013: 1
FWCI
36.05
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Genome biology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Monash University Research Portal (Monash University) (acceptedVersion, other-oa)
  • UNSWorks (University of New South Wales, Sydney, Australia) (submittedVersion, cc-by-nc-nd)
  • Adelaide Research & Scholarship (AR&S) (University of Adelaide) (submittedVersion, cc-by)
Funders
  • National Health and Medical Research Council (1035721, 1102752)
  • Cancer Australia (1044458)
  • Science and Industry Endowment Fund (AU) (RP03-064)
  • Cancer Institute of New South Wales (14/ECF/1-23)
  • Prostate Cancer Foundation of Australia (YI0911)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gene expression and cancer classification
Keywords
DNA methylation profiling, distal regulatory elements, enhancers, genetic variation, reproducibility, differentially methylated probes
MeSH terms
Enhancer Elements, Genetic, Humans, Genome, Human, Sequence Analysis, DNA, CpG Islands, DNA Methylation, Oligonucleotide Array Sequence Analysis, High-Throughput Nucleotide Sequencing

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