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Related Experiment Video

Updated: May 10, 2026

Visualizing Single-Stranded DNA Foci in the G1 Phase of the Cell Cycle
08:30

Visualizing Single-Stranded DNA Foci in the G1 Phase of the Cell Cycle

Published on: December 22, 2023

Single-step intercalating dye strategies for DNA damage studies.

Manasa Paidipalli1, Ilija Pjescic1, Patrick L Hindmarsh2

  • 1Institute for Micromanufacturing, Louisiana Tech University, 911 Hergot Ave., Ruston, LA 71272, United States.

Journal of Microbiological Methods
|June 18, 2013
PubMed
Summary
This summary is machine-generated.

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Real-time damage monitoring of irradiated DNA.

Integrative biology : quantitative biosciences from nano to macro·2011

Quantitative PCR (qPCR) and high-resolution DNA melting analysis (HRMA) offer sensitive detection of DNA damage. These methods quantify DNA strand breaks and intramolecular damage by measuring reduced amplification and altered thermal stability.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Numerous methods exist for quantifying DNA damage, varying in complexity and sensitivity.
  • Existing protocols may not cover all types of DNA damage or offer optimal sensitivity.
  • There is a need for accessible and sensitive techniques for DNA damage assessment.

Purpose of the Study:

  • To demonstrate the application of quantitative PCR (qPCR) and high-resolution DNA melting analysis (HRMA) for detecting and quantifying DNA damage.
  • To explore qPCR and HRMA as sensitive, single-step alternatives or complements to existing DNA damage assays.
  • To investigate the impact of DNA damage on DNA amplification and thermal stability.

Main Methods:

  • Utilized quantitative PCR (qPCR) to measure the decrease in amplifiable DNA concentration due to damage.
Keywords:
CPDsDNA damageHRMAPhotoproductsStrand breaksqPCR

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Last Updated: May 10, 2026

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  • Employed high-resolution DNA melting analysis (HRMA) to detect alterations in DNA thermal stability caused by damage.
  • Used UV-C irradiation to induce photoproducts and restriction enzymes to simulate double-strand breaks as damage models.

    • Main Results:

    • DNA damage was found to inhibit the amplification of affected DNA molecules, measurable by qPCR.
    • Intramolecular dimerization and strand breaks significantly altered DNA thermal stability, precisely detected by HRMA.
    • The study achieved high sensitivity using a third-generation saturating DNA dye with qPCR and HRMA.

    Conclusions:

    • qPCR and HRMA are effective, sensitive, and accessible methods for quantifying DNA damage, including strand breaks and intramolecular alterations.
    • These techniques provide a simplified approach to DNA damage analysis compared to more complex existing protocols.
    • The principles demonstrated are broadly applicable to various DNA damage mechanisms beyond the models used.