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Dose Response of Soft X-Ray-Induced Bystander Cell Killing Affected by p53 Status.
https://repo.qst.go.jp/records/46661
https://repo.qst.go.jp/records/46661de0569b9-7056-4446-884e-71cb26135d96
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2013-12-05 | |||||
タイトル | ||||||
タイトル | Dose Response of Soft X-Ray-Induced Bystander Cell Killing Affected by p53 Status. | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Tomita, Masanori
× Tomita, Masanori× Maeda, Munetoshi× Kobayashi, Katsumi× Matsumoto, Hideki× 冨田 雅典× 小林 克己× 松本 英樹 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | A radiation-induced bystander response, which is generally defined as a cellular response that is induced in nonirradiated cells that received bystander signals from directly irradiated cells within an irradiated cell population. In our earlier X-ray microbeam studies, bystander cell killing in normal human fibroblasts had a parabolic relationship to the irradiation dose. To elucidate the role of p53 in the bystander cell killing, the effects were assessed using human non-small cell lung cancer cells expressing wild-type or temperature-sensitive mutated p53. The surviving fraction of bystander wild-type p53 cells showed a parabolic relationship to the irradiation dose; survival was steeply reduced up to 0.45 Gy, recovered toward to 2 Gy, and remained at control levels up to 5 Gy. In contrast, in the mutated p53 cells at a nonpermissive temperature, the surviving fraction was steeply reduced up to 1 Gy and remained at the reduced level up to 5 Gy. When the mutated p53 cells were incubated at a permissive temperature, the decrease in the surviving fraction at 2 Gy was suppressed. The wild-type p53 cells were not only restrained in releasing bystander signals at 2 Gy, but were also resistant to the signals released by the mutated p53 cells. These results suggest that the X-ray-induced bystander cell killing depends on both the irradiation dose and the p53 status of the targeted cells and the bystander cells. | |||||
書誌情報 |
Radiation Research 巻 179, 号 2, p. 200-207, 発行日 2013-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0033-7587 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1667/rr3010.1 |