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International Journal of Legal Medicine

, Volume 132, Issue 4, pp 1049–1056 | Cite as

Assessment of mitochondrial DNA heteroplasmy detected on commercial panel using MPS system with artificial mixture samples

  • Sohee Cho
  • Moon Young Kim
  • Ji Hyun Lee
  • Soong Deok Lee
Original Article

Abstract

Mitochondrial DNA (mtDNA) heteroplasmy is a potential genetic marker for forensic mtDNA analysis as well as phylogenic studies. Frequency of mtDNA heteroplasmy has been investigated in different populations through massively parallel sequencing (MPS) analysis, revealing various levels of frequency based on different MPS systems. For accurate heteroplasmy identification, it is essential to explore reliable detection threshold on various MPS systems. In addition, software solutions and pipelines need to be evaluated to analyze data effectively. In this study, heteroplasmy analysis was conducted on a commercially available mtDNA analysis system developed for forensic caseworks with artificially mixed DNA samples known for ratios and variant positions for assessment. mtDNA heteroplasmy > 10% was detectable with Torrent Variant Caller (TVC) while lower levels were identified using GeneMarker® HTS specialized software for minor variant detection. This study implies that analytical parameters and tools need to be optimized and evaluated for low-level heteroplasmy identification. Automated system with simple and efficient workflow is needed for forensic caseworks.

Keywords

Mitochondrial DNA Low-level heteroplasmy Mixture Massively parallel sequencing 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  • Sohee Cho
    • 1
  • Moon Young Kim
    • 2
  • Ji Hyun Lee
    • 2
  • Soong Deok Lee
    • 1
    • 2
  1. 1.Institute of Forensic ScienceSeoul National University College of MedicineSeoulSouth Korea
  2. 2.Department of Forensic MedicineSeoul National University College of MedicineSeoulSouth Korea

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