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Related Experiment Video

Updated: May 19, 2026

A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals
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A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals

Published on: March 13, 2011

Nail DNA and possible biomarkers: a pilot study.

Joshua Park1, Debbie Liang, Jung Woo Kim

  • 1Genetic Epidemiology Research Institute, University of California, Irvine, USA.

Journal of Preventive Medicine and Public Health = Yebang Uihakhoe Chi
|August 11, 2012
PubMed
Summary

Nail DNA is a viable source for biomarker studies, showing consistent amplification. Mitochondrial DNA (mtDNA) offers better integrity and consistency for biomarker research compared to nuclear DNA (nucDNA).

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Area of Science:

  • Forensic Science
  • Molecular Biology
  • Biomarker Research

Background:

  • Nails serve as a potential source for DNA genotyping.
  • Investigating nail DNA integrity and amplification consistency is crucial for biomarker studies.

Purpose of the Study:

  • To assess the integrity and consistency of nail DNA amplification for biomarker research.
  • To explore longer DNA amplification possibilities and the presence of GAPDH RNA/protein in nail samples.

Main Methods:

  • Quantitative amplification of nuclear and mitochondrial genes using three primer sets.
  • Analysis of polymerase chain reaction (PCR) consistency across various individual factors and amplification segment sizes.
  • Investigating RNA and protein presence using reverse transcription PCR and immunoblotting.
Keywords:
Biomarks in nailCirculatory DNAIntra-individual monitoring

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Last Updated: May 19, 2026

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Main Results:

  • Nail DNA amplification demonstrated consistent integrity across different nail sources and collection times.
  • Individuals in their forties exhibited earlier amplification threshold cycles compared to teens or seventies.
  • Mitochondrial DNA (mtDNA) displayed superior DNA integrity and amplification consistency over nuclear DNA (nucDNA).
  • Successful amplification of over 9 kb of mtDNA and reliable copy number quantification were achieved.
  • Reverse transcription PCR and immunoblotting confirmed the presence of mRNA and GAPDH protein, respectively.

Conclusions:

  • Nail DNA presents a feasible option for intra-individual monitoring as a biomarker.
  • Mitochondrial DNA (mtDNA) is recommended as a more suitable target than nuclear DNA (nucDNA) for biomarker research due to its integrity and amplification consistency.