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Updated: Mar 11, 2026

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation

Expedited Radiation Biodosimetry by Automated Dicentric Chromosome Identification ADCI and Dose Estimation

Published on: September 4, 2017

Cytogenetics for Biological Dosimetry.

Michelle Ricoul¹, Tamizh Gnana-Sekaran¹, Laure Piqueret-Stephan¹

¹PROCyTOX Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Fontenay-aux-Roses and Université Paris-Saclay, 18 route du Panorama, 92265, Fontenay-aux-Roses cedex, France.

Methods in Molecular Biology (Clifton, N.J.)

|December 3, 2016

Summary

Cytogenetic assays, like the dicentric assay, remain the gold standard for biological dosimetry after radiation exposure. Advanced FISH and PCC techniques offer enhanced specificity and faster dose assessment.

Keywords:

Biological dosimetry Centromere Chromosomal aberrations Radiation effects Telomere

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Area of Science:

Cytogenetics
Radiation Biology
Genetics

Background:

Cytogenetics is the gold-standard for biological dosimetry to assess ionizing radiation dose.
While newer methods exist, cytogenetic approaches, especially the dicentric assay, offer unparalleled specificity.
This review focuses on key cytogenetic techniques for radiation dose assessment.

Purpose of the Study:

To review principal cytogenetic techniques for biological dosimetry.
To highlight the dicentric assay, micronuclei assay, and PCC assay.
To discuss advancements in FISH and their impact on dose assessment.

Main Methods:

Dicentric assay in metaphase cells.
Micronuclei assay in binucleated cells.
Prematurely Condensed Chromosome (PCC) assay in interphase cells.
Fluorescence In Situ Hybridization (FISH) techniques, including telomere-centromere staining.

Main Results:

The dicentric assay is highly specific for radiation dose assessment.
FISH techniques enhance dicentric assay analysis and enable long-term dose assessment via translocation analysis.
PCC assay with telomere-centromere staining shows promise for rapid (within 24h) dose assessment.

Conclusions:

Cytogenetic methods, particularly the dicentric assay, are crucial for accurate biological dosimetry.
Advancements in FISH and PCC staining are improving the speed and accuracy of radiation dose assessment.
Future applications of telomere-centromere staining in PCCs will enable rapid post-exposure dose evaluation.