Radiotoxicity of iodine-125 and other auger-electron-emitting radionuclides: background to therapy.
Auger-electron cascades with their ability to deposit energy in extremely small volumes, typically in the range of cubic nanometers, have served as valuable probes of radiobiologic phenomena. Results from their experimental use form part of the evidence that nuclear DNA is the most radiosensitive cell element; that chromosomal aberrations and large scale double-strand breaks are correlated with reproductive survival; that neoplastic transformation and also mutagenesis are greatest at low doses with high specific ionization; and that, like high linear-energy-transfer radiation, Auger-electron cascades can lead to bystander effects. We have also learned that radiobiologic responses to Auger-electron emission are particularly sensitive to the site of decay, not only within the cell but also in the nucleus within the fine structure of chromatin.
Adelstein
S James
SJ
Experimental Nuclear Medicine, Department of Radiology, Harvard Medical School, Boston, Massachusetts, USA.
Kassis
Amin I
AI
Bodei
Lisa
L
Mariani
Giuliano
G
D004247:DNA / Q000528:radiation effects*; D004249:DNA Damage; D006801:Humans; D007457:Iodine Radioisotopes / Q000633:toxicity*; D009369:Neoplasms / Q000532:radiotherapy; D011836:Radiation Tolerance; D011874:Radiometry; D011876:Radionuclide Generators
D007457:Iodine Radioisotopes; D004247:DNA