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In vitro RABiT measurement of dose rate effects on radiation induction of micronuclei in human peripheral blood lymphocytes

Radiation and Environmental Biophysics volume 55, pages 53–59 (2016)Cite this article

Abstract

Developing new methods for radiation biodosimetry has been identified as a high-priority need in case of a radiological accident or nuclear terrorist attacks. A large-scale radiological incident would result in an immediate critical need to assess the radiation doses received by thousands of individuals. Casualties will be exposed to different doses and dose rates due to their geographical position and sheltering conditions, and dose rate is one of the principal factors that determine the biological consequences of a given absorbed dose. In these scenarios, high-throughput platforms are required to identify the biological dose in a large number of exposed individuals for clinical monitoring and medical treatment. The Rapid Automated Biodosimetry Tool (RABiT) is designed to be completely automated from the input of blood sample into the machine to the output of a dose estimate. The primary goal of this paper was to quantify the dose rate effects for RABiT-measured micronuclei in vitro in human lymphocytes. Blood samples from healthy volunteers were exposed in vitro to different doses of X-rays to acute and protracted doses over a period up to 24 h. The acute dose was delivered at ~1.03 Gy/min and the low dose rate exposure at ~0.31 Gy/min. The results showed that the yield of micronuclei decreases with decreasing dose rate starting at 2 Gy, whereas response was indistinguishable from that of acute exposure in the low dose region, up to 0.5 Gy. The results showed a linear-quadratic dose–response relationship for the occurrence of micronuclei for the acute exposure and a linear dose–response relationship for the low dose rate exposure.

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Authors and Affiliations

  1. Center for Radiological Research, Columbia University Medical Center, 630 W. 168th St., New York, NY, 10032, USA

    Antonella Bertucci, Lubomir B. Smilenov, Helen C. Turner, Sally A. Amundson & David J. Brenner

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  1. Antonella Bertucci
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  2. Lubomir B. Smilenov
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  3. Helen C. Turner
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  4. Sally A. Amundson
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  5. David J. Brenner
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Correspondence to Antonella Bertucci.

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Bertucci, A., Smilenov, L.B., Turner, H.C. et al. In vitro RABiT measurement of dose rate effects on radiation induction of micronuclei in human peripheral blood lymphocytes. Radiat Environ Biophys 55, 53–59 (2016). https://doi.org/10.1007/s00411-015-0628-z

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  • DOI: https://doi.org/10.1007/s00411-015-0628-z

Keywords

  • Biodosimetry
  • Micronuclei
  • RABiT
  • High throughput
  • Nuclear accident