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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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RENEB biodosimetry intercomparison analyzing translocations by FISH.

Joan Francesc Barquinero1, Christina Beinke2, Mireia Borràs1

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The RENEB consortium harmonized translocation-based biodosimetry for accurate retrospective dose assessment. Intercomparison exercises demonstrated the network

Keywords:
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Area of Science:

  • Cytogenetics
  • Radiation Biology
  • Medical Physics

Background:

  • RENEB (Reference Network for the European Bio-dosimetry) conducted biodosimetry exercises.
  • Translocation analysis is a key method for retrospective biodosimetry due to stable frequencies post-irradiation.
  • Harmonizing translocation-based biodosimetry accuracy is crucial for reliable dose estimation.

Purpose of the Study:

  • To harmonize the accuracy of translocation-based biodosimetry within the RENEB consortium.
  • To establish consistent and reliable retrospective biodosimetry methods across participating institutions.

Main Methods:

  • An initial telescoring exercise was performed to standardize chromosome aberration descriptions.
  • Two blind intercomparison exercises (IE) involved sending irradiated blood samples to RENEB partners.
  • Partners cultured and stained samples using standard protocols, estimating dose from translocation frequencies.

Main Results:

  • The coefficient of variation (CV) for total translocation frequency decreased from 0.34 in the 1st IE to 0.16-0.23 in the 2nd IE.
  • Z-score analysis showed satisfactory dose estimates for 80% (1st IE) and 85% (2nd IE) of the participants.
  • These results indicate improved accuracy and consistency in translocation-based biodosimetry.

Conclusions:

  • The RENEB consortium has demonstrated its capability in performing retrospective biodosimetry using translocation analysis via FISH.
  • Identified issues with a few partners are correctable, paving the way for enhanced network performance.
  • The study validates the utility of harmonized translocation frequency analysis for accurate radiation dose assessment.