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Radiosensitivity of hypoxic and proliferating clonogen in a human lung cancer grown in nude mice
https://repo.qst.go.jp/records/43898
https://repo.qst.go.jp/records/43898cf044bac-215c-4bd3-b08f-afa74e32279e
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2005-12-16 | |||||
タイトル | ||||||
タイトル | Radiosensitivity of hypoxic and proliferating clonogen in a human lung cancer grown in nude mice | |||||
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 |
Miyamoto, Tadaaki
× Miyamoto, Tadaaki× Ishii, Sachiko× Eguchi-Kasai, Kiyomi× Saegusa, Kumiko× 宮本 忠昭× 石井 幸子× 笠井 清美× 三枝 公美子 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Using cultured and nude mouse tumor cells (IA) derived from a human lung cancer, we studied their radiosensitivity by focusing attention on the dynamics of tumor clonogens. The movement of clonogens in the regrowing IA tumor after irradiation can be divided into three phases: first: the early and rapid survival recovery (PLD repair) phase, second, the delay phase involving a certain lag in survival change, and third, the repopulation phase consisting of two stages: the anoxic repopulation before angiogenesis and the hypoxic repopulation in the presence of a poorly-developed vascular network. Clonogens in a regrowing tumor after irradiation were found to actively proliferate even in an anoxic environment before angiogenesis and under the hypoxic conditions prevailing after the formation of a tumor with a poorly developed vascular system. This re-grown tumor was found to be more radioresistant than a sham-treated control tumor. It is believed that these clonogens are genetically selected under hypoxic conditions throughout the process of tumor growth and regrowth, and may be primarily involved in tumor recurrence or accelerated repopulation in fractionated irradiation. | |||||
書誌情報 |
Oncology Reports 巻 14, p. 1421-1428, 発行日 2005 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1021-335X |