Cited by 1,033Epigenetics and DNA MethylationGenetic Syndromes and ImprintingGenomics and Chromatin Dynamics

A simple method for estimating global DNA methylation using bisulfite PCR of repetitive DNA elements

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Yang, A. S.·2004·Nucleic Acids Research

Abstract

We report a method for studying global DNA methylation based on using bisulfite treatment of DNA and simultaneous PCR of multiple DNA repetitive elements, such as Alu elements and long interspersed nucleotide elements (LINE). The PCR product, which represents a pool of approximately 15 000 genomic loci, could be used for direct sequencing, selective restriction digestion or pyrosequencing, in order to quantitate DNA methylation. By restriction digestion or pyrosequencing, the assay was reproducible with a standard deviation of only 2% between assays. Using this method we found that almost two-thirds of the CpG methylation sites in Alu elements are mutated, but of the remaining methylation target sites, 87% were methylated. Due to the heavy methylation of repetitive elements, this assay was especially useful in detecting decreases in DNA methylation, and this assay was validated by examining cell lines treated with the methylation inhibitor 5-aza-2'deoxycytidine (DAC), where we found a 1-16% decrease in Alu element and 18-60% LINE methylation within 3 days of treatment. This method can be used as a surrogate marker of genome-wide methylation changes. In addition, it is less labor intensive and requires less DNA than previous methods of assessing global DNA methylation.

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Authors
Yang, A. S.
Affiliations
The University of Texas MD Anderson Cancer Center (US)
Corresponding author
Yang, A. S.
Venue
Nucleic Acids Research
Published
2004-02-13
Volume
32
Issue
3
Pages
38e-38
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2106401558
Cited by
1,033
References
1
Citations by year
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FWCI
9.49
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Acervo Digital da Universidade Estadual Paulista (Universidade Estadual Paulista) (submittedVersion, other-oa)
  • Americanae (AECID Library) (submittedVersion, other-oa)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, other-oa)
Funders
National Cancer Institute (P50CA100632, CA-16672, R33CA89837, R33CA089837, P30CA016672)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Syndromes and Imprinting
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
global DNA methylation, repetitive DNA, Alu elements, CpG methylation, decitabine, pyrosequencing, restriction enzyme digestion
MeSH terms
Decitabine, Azacitidine, DNA, Humans, Mutation, Repetitive Sequences, Nucleic Acid, Sensitivity and Specificity, Sulfites, Reproducibility of Results, Polymerase Chain Reaction, Sequence Analysis, DNA, CpG Islands, DNA Methylation, Long Interspersed Nucleotide Elements, Alu Elements, Cell Line, Tumor

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