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Methodology for Accurate Detection of Mitochondrial DNA Methylation
Published on: May 20, 2018
Detection of UV-Induced Deletions in Mitochondrial DNA
Gabriele A Fontana1, Hailey L Gahlon2
1Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland.
Abstract:
Mitochondrial DNA (mtDNA) mutations are found in several human pathologies and are associated with aging. Deletion mutations in mtDNA result in the loss of essential genes for mitochondrial function. Over 250 deletion mutations have been reported and the common deletion is the most frequent mtDNA deletion linked to disease. This deletion removes 4977 base pairs of mtDNA. It has previously been shown that exposure to UVA radiation can promote the formation of the common deletion. Furthermore, aberrations in mtDNA replication and repair are associated with formation of the common deletion. However, molecular mechanisms describing the formation of this deletion are poorly characterized. This chapter describes a method to irradiate human skin fibroblasts with physiological doses of UVA and the subsequent detection of the common deletion by quantitative PCR analysis.
Insights
Mitochondrial DNA (mtDNA) common deletions, linked to disease and aging, can be induced by UVA radiation. This study details a method to detect this common deletion in human skin fibroblasts after UVA exposure.
Area of Science:
- Genetics
- Molecular Biology
- Cell Biology
Background:
- Mitochondrial DNA (mtDNA) mutations are implicated in human diseases and aging.
- Deletion mutations in mtDNA, particularly the common deletion (4977 bp), disrupt essential gene function.
- UVA radiation exposure and aberrant mtDNA replication/repair are linked to common deletion formation, but mechanisms remain unclear.
Purpose of the Study:
- To describe a method for detecting the common deletion in human skin fibroblasts.
- To investigate the role of UVA radiation in the formation of the common deletion.
Main Methods:
- Irradiation of human skin fibroblasts with physiological doses of UVA radiation.
- Detection of the common deletion using quantitative PCR analysis.
Main Results:
- The study successfully established a method to detect the common deletion in UVA-exposed fibroblasts.
- This method allows for the investigation of molecular mechanisms underlying deletion formation.
Conclusions:
- The described method enables the study of UVA-induced mtDNA common deletions in a controlled cellular model.
- Further research can elucidate the molecular pathways involved in mtDNA deletion formation.
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