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Auger electron emitters: Insights gained from in vitro experiments

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Summary

This paper outlines the evolution of the current rationale for research into the biological effects of tissue-incorporated Auger electron emitters. The first section is a brief review of the research conducted by several groups in the last fifteen years. The second section describes the in vitro model used in our studies, dosimetric calculations, experimental techniques and recent findings. The third section focuses on the use of Auger electron emitters as in vitro microprobes for the investigation of the radiosensitivity of distinct subcellular components. Examination of the biological effects of the Auger electron emitter125I located in different cellular compartments of a single cell line (V79 hamster lung fibroblast) verifies that DNA is the critical cell structure for radiation damage and that the sensitive sites are of nanometer dimensions. The data from incorporation of several Auger electron emitters at the same location within DNA suggest that there are no saturation effects from the decay of these isotopes (i.e. all the emitted energy is biologically effective) and provide some insight into which of the numerous physical mechanisms accompanying the Auger decay are most important in causing cell damage. Finally the implications of Auger electron emission for radiotherapy and radiation protection in diagnostic nuclear medicine are detailed and further research possibilities are suggested.

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Authors and Affiliations

  1. Shields Warren Radiation Laboratory, Department of Radiology, Harvard Medical School, 50 Binney Street, MA 02115, Boston, USA

    G. Makrigiorgos, S. J. Adelstein & A. I. Kassis

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  1. G. Makrigiorgos
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  2. S. J. Adelstein
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  3. A. I. Kassis
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Makrigiorgos, G., Adelstein, S.J. & Kassis, A.I. Auger electron emitters: Insights gained from in vitro experiments. Radiat Environ Biophys 29, 75–91 (1990). https://doi.org/10.1007/BF01210552

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