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Published in: European Journal of Nuclear Medicine and Molecular Imaging 7/2016

Open Access 01-07-2016 | Original Article

Gene signature of the post-Chernobyl papillary thyroid cancer

Authors: Daria Handkiewicz-Junak, Michal Swierniak, Dagmara Rusinek, Małgorzata Oczko-Wojciechowska, Genevieve Dom, Carine Maenhaut, Kristian Unger, Vincent Detours, Tetiana Bogdanova, Geraldine Thomas, Ilya Likhtarov, Roman Jaksik, Malgorzata Kowalska, Ewa Chmielik, Michal Jarzab, Andrzej Swierniak, Barbara Jarzab

Published in: European Journal of Nuclear Medicine and Molecular Imaging | Issue 7/2016

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Abstract

Purpose

Following the nuclear accidents in Chernobyl and later in Fukushima, the nuclear community has been faced with important issues concerning how to search for and diagnose biological consequences of low-dose internal radiation contamination. Although after the Chernobyl accident an increase in childhood papillary thyroid cancer (PTC) was observed, it is still not clear whether the molecular biology of PTCs associated with low-dose radiation exposure differs from that of sporadic PTC.

Methods

We investigated tissue samples from 65 children/young adults with PTC using DNA microarray (Affymetrix, Human Genome U133 2.0 Plus) with the aim of identifying molecular differences between radiation-induced (exposed to Chernobyl radiation, ECR) and sporadic PTC. All participants were resident in the same region so that confounding factors related to genetics or environment were minimized.

Results

There were small but significant differences in the gene expression profiles between ECR and non-ECR PTC (global test, p < 0.01), with 300 differently expressed probe sets (p < 0.001) corresponding to 239 genes. Multifactorial analysis of variance showed that besides radiation exposure history, the BRAF mutation exhibited independent effects on the PTC expression profile; the histological subset and patient age at diagnosis had negligible effects. Ten genes (PPME1, HDAC11, SOCS7, CIC, THRA, ERBB2, PPP1R9A, HDGF, RAD51AP1, and CDK1) from the 19 investigated with quantitative RT-PCR were confirmed as being associated with radiation exposure in an independent, validation set of samples.

Conclusion

Significant, but subtle, differences in gene expression in the post-Chernobyl PTC are associated with previous low-dose radiation exposure.
Appendix
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Metadata
Title
Gene signature of the post-Chernobyl papillary thyroid cancer
Authors
Daria Handkiewicz-Junak
Michal Swierniak
Dagmara Rusinek
Małgorzata Oczko-Wojciechowska
Genevieve Dom
Carine Maenhaut
Kristian Unger
Vincent Detours
Tetiana Bogdanova
Geraldine Thomas
Ilya Likhtarov
Roman Jaksik
Malgorzata Kowalska
Ewa Chmielik
Michal Jarzab
Andrzej Swierniak
Barbara Jarzab
Publication date
01-07-2016
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Nuclear Medicine and Molecular Imaging / Issue 7/2016
Print ISSN: 1619-7070
Electronic ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-015-3303-3

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