The genotoxicity of alpha particles in human embryonic skin fibroblasts

D. J. Chen, G. F. Strniste, N. Tokita

Research output: Contribution to journalArticle

25 Scopus citations


Cell inactivation and induced mutation frequencies at the hypoxanthine-guanine phosphoribosyl transferase (HGPRT) locus have been measured in cultured human fibroblasts (GM10) exposed to α particles from 238Pu (LET at the cell surface was 100 keV/μm) and 250 kVp X rays. The survival curves resulting from exposure to α particles are exponential. The mean lethal dose, D0, is approximately 1.3 Gy for X rays and 0.25 Gy for α particles. As a function of radiation dose, mutation induction at the HGPRT locus was linear for α particles whereas the X-ray-induced mutation data were better fitted by a quadratic function. When mutation frequencies were plotted against the log of survival, mutation frequency at a given survival level was greater in cells exposed to α particles than to X rays.

Original languageEnglish (US)
Pages (from-to)321-327
Number of pages7
JournalRadiation Research
Issue number2
Publication statusPublished - 1984


ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Biophysics
  • Radiology Nuclear Medicine and imaging
  • Radiation

Cite this

Chen, D. J., Strniste, G. F., & Tokita, N. (1984). The genotoxicity of alpha particles in human embryonic skin fibroblasts. Radiation Research, 100(2), 321-327.