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Updated: Jun 24, 2026
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Methodology for Accurate Detection of Mitochondrial DNA Methylation
Published on: May 20, 2018
Protocol for mitochondrial DNA extraction, purity evaluation, and global methylation assessment via LC-MS/MS
Argyri Chroni1, Theodora Alexiou2, John Zafeiropoulos3
1Biology Laboratory, School of Science and Technology, Hellenic Open University, Patras 26335, Greece; School of Health Sciences, Faculty of Medicine, Department of Internal Medicine, University of Patras, and "Olympion" General Clinic, Department of Hematology, Patras, Greece.
STAR Protocols
|June 22, 2026
Summary
This study optimized mitochondrial DNA (mtDNA) extraction and methylation analysis. The new protocol minimizes nuclear DNA (nDNA) contamination for accurate mtDNA methylation profiling.
Area of Science:
- Epigenetics
- Mitochondrial Biology
- Genomics
Background:
- Epigenetic mechanisms like nuclear DNA (nDNA) methylation regulate the mitochondrial (mt) genome.
- Evaluating mtDNA methylation is challenging due to technical and biological confounders.
Purpose of the Study:
- To present an optimized protocol for mtDNA extraction and methylation analysis.
- To enable accurate quantitative assessment of the global mtDNA methylation profile.
Main Methods:
- Optimized protocol for mtDNA extraction from peripheral blood and bone marrow mononuclear cells.
- Qualitative assessment to exclude nDNA contamination.
- Quantitative analysis of mtDNA global methylation using liquid chromatography-mass spectrometry.
Main Results:
- Successfully developed and validated an optimized protocol for mtDNA isolation.
- Established a method to effectively exclude nDNA contamination.
- Enabled quantitative analysis of global mtDNA methylation.
Conclusions:
- The optimized protocol provides a reliable method for studying mtDNA methylation.
- This advancement facilitates further research into epigenetic regulation of the mitochondrial genome.
