Cited by 45Radiation Therapy and DosimetryEffects of Radiation ExposureParticle Detector Development and Performance

Inactivation of individual mammalian cells by single alpha-particles

PUGLIESE, M. DURANTE, G. F. GROSSI,, M.·1997·International Journal of Radiation Biology

Abstract

PURPOSE: To measure clonogenic death of Chinese hamster V79 cells following exposure to a defined number of 4.3 MeV alpha-particles (track-averaged LET = 105 keV/micron). MATERIALS AND METHODS: Cells were irradiated at the radiobiological facility installed at the TTT-3 Tandem accelerator in Naples by using a 'Biostack' approach, which allows the positions of incident tracks relative to cells to be carefully determined. Subcellular structure was identified by fluorescence microscopy, while tracks were visualized by LR-115 solid state nuclear track detectors. RESULTS: Particle hits in the cytoplasm did not significantly affect cell survival, yet survival probability decreased exponentially as a function of the number of nuclear traversals. Measured probability of surviving to exactly one 4.3 MeV alpha-particle traversal in the cell nucleus was 0.67 +/- 0.10. Inactivation cross-section was substantially higher than expected from conventional survival curves. However, folding of the data with Poisson statistics showed that survival level expected if a mean of one alpha-particle goes through a nucleus is higher than the measured value after exactly one particle traversal. CONCLUSIONS: V79 cells have about 67% probability to survive a single alpha-particle traversal in the cell nucleus. Single-particle survival curves are consistent with conventional dose-survival relationships, once Poisson distribution of traversals is taken into account.

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Crossref · 10.1080/095530097143176

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  • A single alpha-particle traversal of a cell nucleus can cause multiple double-strand breaks and likely lead to cell death.

    “Consequently, a single a -particle traversal of a cell nucleus can cause multiple double-strand breaks and likely lead to cell death ( 22 ).”

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Authors
PUGLIESE, M. D.
Venue
International Journal of Radiation Biology
Published
1997-01
Volume
72
Issue
4
Pages
397-407
ISSN
  • 0955-3002 (ISSN-L)
  • 1362-3095
OpenAlex
W2141003974
Cited by
45
References
22
Citations by year
2024: 2 · 2023: 1 · 2022: 2 · 2021: 2 · 2020: 1 · 2018: 1 · 2017: 2 · 2015: 2 · 2014: 1 · 2012: 3
FWCI
2.20
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Radiation Biology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Radiation Therapy and Dosimetry
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Particle Detector Development and Performance
Keywords
clonogenic survival, V79 cells, inactivation cross section, Poisson statistics, solid state nuclear track detectors
MeSH terms
Alpha Particles, Animals, Cell Line, Cell Nucleus, Cell Survival, Cricetulus, Cytosol, Fibroblasts, Cricetinae, Image Processing, Computer-Assisted, Mathematical Computing, Microscopy, Fluorescence, Monte Carlo Method, Linear Energy Transfer

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