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Updated: May 6, 2026
Methodology for Accurate Detection of Mitochondrial DNA Methylation
Published on: May 20, 2018
Long-range PCR as a tool for evaluating mitochondrial DNA damage: Principles, benefits, and limitations of the
Artem P Gureev1, Veronika V Nesterova1, Irina S Sadovnikova1
1Departments of Genetics, Cytology and Bioengineering, Voronezh State University, Voronezh, Russia.
Abstract:
Mitochondrial DNA (mtDNA) is often more susceptible to damage compared to nuclear DNA. This is due to its localization in the mitochondrial matrix, where a large portion of reactive oxygen species are produced. Mitochondria do not have histones and mtDNA is only slightly protected by histone-like proteins and is believed to have less efficient repair mechanisms. In this review, we discuss the long-range PCR method, which allows for the effective detection of mtDNA damage. The method is based on the assumption that various types of DNA lesions can interfere the progress of DNA polymerase, resulting in reduced amplification efficiency. It can be used to estimate the number of additional (above background) lesions in mtDNA. The review outlines the evolution of the methodology, its variations, applications in a wide range of model organisms, the advantages of the method and its limitations, as well as ways to overcome these limitations. Over the past two decades, the use of long-range PCR has allowed the study of mtDNA repair mechanisms, the characteristics of mitochondrial genome damage in various neurodegenerative diseases, aging, ischemic and oncological processes, as well as in anticancer therapy. The assessment of mtDNA damage has also been proposed for use in environmental biomonitoring. This review provides a critical evaluation of the various variations of this method, summarizes the accumulated data, and discusses the role of mtDNA damage in different organs at the organismal level.
Insights
Mitochondrial DNA (mtDNA) is vulnerable to damage due to its location and limited repair. Long-range PCR effectively detects this damage, aiding research into diseases and aging.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Mitochondrial DNA (mtDNA) is highly susceptible to damage from reactive oxygen species due to its cellular location and limited repair mechanisms.
- Unlike nuclear DNA, mtDNA lacks robust histone protection and possesses less efficient DNA repair pathways.
Purpose of the Study:
- To review the long-range PCR method for detecting mitochondrial DNA damage.
- To critically evaluate the evolution, variations, applications, and limitations of this technique.
Main Methods:
- The review focuses on the long-range PCR technique, which infers mtDNA damage by observing reduced DNA polymerase amplification efficiency.
- This method quantifies additional lesions in mtDNA above background levels.
Main Results:
- Long-range PCR has been instrumental in studying mtDNA repair, damage in neurodegenerative diseases, aging, and cancer over the past two decades.
- The method's applications extend to environmental biomonitoring and assessing mtDNA damage across various organs.
Conclusions:
- Long-range PCR is a valuable tool for assessing mitochondrial DNA damage and its implications in health and disease.
- Further critical evaluation and refinement of the method are ongoing to overcome limitations and expand its utility.
