HE Jing1, 2 LI Qiang1 JIN Xiaodong1, 2 1. hprt mutation in human hepatocyte L02 cells induced by (12)C6+ ions[J]. Nuclear techniques, 2008, (3): 188-192.
HE Jing1, 2 LI Qiang1 JIN Xiaodong1, 2 1. hprt mutation in human hepatocyte L02 cells induced by (12)C6+ ions[J]. Nuclear techniques, 2008, (3): 188-192.DOI:
The work was to study hprt mutation inducted in human hepatocyte L02 cells exposed to 12C6+ ions
and to provide basic data and evidence for risk assessment of heavy ion irradiation to healthy tissues. Human hepatocyte L02 cells were irradiated with 83.6 MeV/u 12C6+ ions with LET of 30 keV/ μ m or X-rays. Survival fractions of the cells were studied by colony-formation efficiency. Mutation induction at the hprt locus was detected by measuring 6-thioguanine-resistant clones. After 10 days of incubation in presence of 15 mg/L 6-TG
the mutants were counted. The results showed that the survival fraction of L02 cells irradiated by carbon beams was much lower than that of the X-ray irradiated cells. The number of mutants per 106 surviving cells and the mutation frequency increased with the carbon ion and X-ray dose up to 1 Gy. It is concluded that human hepatocyte L02 cells are more sensitive to high-LET carbon ions
which are more effective in inducing hprt mutation in the survivors of L02 cells.