@article{oai:repo.qst.go.jp:00054992,
 author = {古澤, 佳也 and 青木, 瑞穂 and 内海, 博司 and 大塚, 健太郎 and 月原, 一浩 and 檜枝, 光太郎 and 船田, 文 and 佐藤, 一史 and 高倉, かほる and 古澤 佳也 and 青木 瑞穂 and 内海 博司 and 檜枝 光太郎 and 高倉 かほる},
 journal = {放射線医学総合研究所重粒子線がん治療装置等共同利用研究報告書},
 month = {Apr},
 note = {To determine radiobiological mechanisms and repair efficiencies of DNA double-strand breaks as (dsb) a function of LET and/or ion-species, HSG (human salivary gland tumor) and DT40 (chicken leukemia B) cells were exposed to heavy-ion beams obtained from HIMAC. The LET dependences of cell killing on the knockout mutant cells of DNA-dsb repair genes (ku70-/-, rad54-/-, ku70-/-rad54-/-, and the parent DT40), and that of PLDR and SLDR in HSG cells were investigated.  
   LET dependencies of repair from DNA-dsb in DT40 cells showed a big difference revealed by the difference in presence or absence of sister chromatid and repair genes in the cell. A usual LET-RBE relationship was observed in repair sufficient cells, but no peak of RBE was found in repair deficient cells. This suggests that the peak of the RBE caused by misrepair of DNA dsb. LET dependency of SLDR on HSG cells determined by X-ray following exposure of different high-LET as primary irradiation was difficult to find.  This may caused that the SLD in the cell produced by the penumbra of the ion-beam.},
 pages = {104--105},
 title = {重粒子線の線種および線質とＲＢＥおよびＯＥＲのスペクトル（重粒子線の線種および線質と障害からの回復）},
 year = {2001}
}