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Gene expression as a biomarker for human radiation exposure

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Abstract

Accidental exposure to ionizing radiation can be unforeseen, rapid, and devastating. The detonation of a radiological device leading to such an exposure can be detrimental to the exposed population. The radiation-induced damage may manifest as acute effects that can be detected clinically or may be more subtle effects that can lead to long-term radiation-induced abnormalities. Accurate identification of the individuals exposed to radiation is challenging. The availability of a rapid and effective screening test that could be used as a biomarker of radiation exposure detection is mandatory. We tested the suitability of alterations in gene expression to serve as a biomarker of human radiation exposure. To develop a useful gene expression biomonitor, however, gene expression changes occurring in response to irradiation in vivo must be measured directly. Patients undergoing radiation therapy provide a suitable test population for this purpose. We examined the expression of CC3, MADH7, and SEC PRO in blood samples of these patients before and after radiotherapy to measure the in vivo response. The gene expression after ionizing radiation treatment varied among different patients, suggesting the complexity of the response. The expression of the SEC PRO gene was repressed in most of the patients. The MADH7 gene was found to be upregulated in most of the subjects and could serve as a molecular marker of radiation exposure.

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Authors and Affiliations

  1. Department of Medical Laboratory and Radiation Sciences, University of Vermont, 302 Rowell Building, Burlington, VT, 05405, USA

    Romaica A. Omaruddin & M. Ahmad Chaudhry

  2. Department of Radiation Oncology, Fletcher Allen Health Care, Burlington, VT, 05405, USA

    Thomas A. Roland & H. James Wallace III

Authors
  1. Romaica A. Omaruddin
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  2. Thomas A. Roland
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  3. H. James Wallace III
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  4. M. Ahmad Chaudhry
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Corresponding author

Correspondence to M. Ahmad Chaudhry.

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Omaruddin, R.A., Roland, T.A., James Wallace III, H. et al. Gene expression as a biomarker for human radiation exposure. Human Cell 26, 2–7 (2013). https://doi.org/10.1007/s13577-013-0059-6

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  • DOI: https://doi.org/10.1007/s13577-013-0059-6

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