101. Single α-particle irradiation permits real-time visualization of RNF8 accumulation at DNA damaged sites.
- Author
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Muggiolu G, Pomorski M, Claverie G, Berthet G, Mer-Calfati C, Saada S, Devès G, Simon M, Seznec H, and Barberet P
- Subjects
- Cell Line, Tumor, DNA-Binding Proteins genetics, Genes, Reporter, Histones metabolism, Humans, Membranes, Artificial, Recombinant Fusion Proteins genetics, Recombinant Fusion Proteins metabolism, Time-Lapse Imaging, Ubiquitin-Protein Ligases genetics, Alpha Particles adverse effects, DNA Damage radiation effects, DNA-Binding Proteins metabolism, Ubiquitin-Protein Ligases metabolism
- Abstract
As well as being a significant source of environmental radiation exposure, α-particles are increasingly considered for use in targeted radiation therapy. A better understanding of α-particle induced damage at the DNA scale can be achieved by following their tracks in real-time in targeted living cells. Focused α-particle microbeams can facilitate this but, due to their low energy (up to a few MeV) and limited range, α-particles detection, delivery, and follow-up observations of radiation-induced damage remain difficult. In this study, we developed a thin Boron-doped Nano-Crystalline Diamond membrane that allows reliable single α-particles detection and single cell irradiation with negligible beam scattering. The radiation-induced responses of single 3 MeV α-particles delivered with focused microbeam are visualized in situ over thirty minutes after irradiation by the accumulation of the GFP-tagged RNF8 protein at DNA damaged sites., Competing Interests: The authors declare no competing financial interests.
- Published
- 2017
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