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Updated: Jun 10, 2026
Methylated DNA Immunoprecipitation
Published on: January 2, 2009
Quality control and single nucleotide resolution analysis of methylated DNA immunoprecipitation products
Jennifer Sengenès1, Antoine Daunay, Marie-Aline Charles
1Laboratory for Epigenetics, Centre National de Génotypage, CEA-Institut de Génomique, 91000 Evry, France.
Abstract:
DNA methylation patterns are altered in many diseases, and their analysis has become of great interest. Methylated DNA immunoprecipitation (MeDIP) is a simple method to enrich the methylated fraction of the genome. However, it has been difficult to assess the quality and the detailed methylation patterns of the immunoprecipitated DNA. Here we present a simple method for the analysis of the immunoprecipitated DNA at single nucleotide resolution by bisulfite treatment and pyrosequencing of genomic regions. The presented method can be used as an initial quality measure prior to genome-wide read-out technologies such as microarrays and second-generation sequencing.
Insights
Analyzing DNA methylation is crucial for understanding diseases. We developed a simple method using bisulfite treatment and pyrosequencing to assess methylated DNA immunoprecipitation (MeDIP) quality at single nucleotide resolution.
Area of Science:
- Epigenetics
- Molecular Biology
- Genomics
Background:
- DNA methylation patterns are frequently altered in various diseases.
- Methylated DNA immunoprecipitation (MeDIP) enriches methylated DNA but assessing its quality and detailed patterns is challenging.
Purpose of the Study:
- To present a straightforward method for analyzing immunoprecipitated DNA quality.
- To enable single nucleotide resolution analysis of DNA methylation patterns.
Main Methods:
- Bisulfite treatment of DNA.
- Pyrosequencing of targeted genomic regions.
- Utilizing MeDIP enriched DNA.
Main Results:
- The method provides single nucleotide resolution for DNA methylation analysis.
- It serves as an effective initial quality control for MeDIP samples.
Conclusions:
- This technique offers a simple and precise way to evaluate MeDIP quality.
- It is a valuable precursor to large-scale genomic analyses like microarrays and next-generation sequencing.
