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Updated: Apr 4, 2026
10:47
Immunofluorescence Microscopy of γH2AX and 53BP1 for Analyzing the Formation and Repair of DNA Double-strand Breaks
Published on: November 3, 2017
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Radiation Induced DNA Double-Strand Breaks in Radiology.
M A Kuefner1, M Brand2, C Engert2
1Department of Radiology, Dornbirn Hospital, Austria.
Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|September 3, 2015
Summary
Radiologic procedures like CT and angiography cause DNA double-strand breaks (DSB). The amount of DSB in lymphocytes correlates with radiation dose but is also influenced by individual factors and contrast agents.
Area of Science:
- Medical Imaging
- Radiation Biology
- Molecular Biology
Background:
- X-rays can damage biological tissues, necessitating accurate radiation exposure assessment.
- Current methods rely on physical measurements or simulations, but biological impact varies.
- DNA double-strand breaks (DSB) are a key indicator of radiation damage.
Purpose of the Study:
- To review the principles and applications of γ-H2AX immunofluorescence microscopy for quantifying radiation-induced DSB.
- To provide an overview of studies assessing DSB in patients undergoing radiologic examinations.
- To discuss factors influencing biological radiation damage beyond dose.
Main Methods:
- Utilizing γ-H2AX immunofluorescence microscopy to detect and quantify DSB in blood lymphocytes.
- Correlating DSB levels with radiation doses from various radiologic procedures.
- Reviewing existing literature on DSB quantification in radiology.
Main Results:
- Radiologic examinations, including CT, angiography, and mammography, induce detectable DSB in peripheral blood lymphocytes.
- The number of induced DSB shows a strong correlation with the radiation dose received.
- Iodinated contrast agents can increase the level of radiation-induced DNA damage.
Conclusions:
- Radiologic procedures are associated with measurable DNA damage.
- Individual factors such as radiation sensitivity and DNA repair capacity modulate the biological response to radiation.
- γ-H2AX serves as a sensitive biomarker for assessing radiation-induced DNA damage in clinical settings.
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