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Impact of hypoxia on the double-strand break repair after photon and carbon ion irradiation of radioresistant HNSCC cells
https://repo.qst.go.jp/records/82094
https://repo.qst.go.jp/records/82094993c9a88-62d4-47e2-a612-d3f2f9370a0a
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-03-09 | |||||
タイトル | ||||||
タイトル | Impact of hypoxia on the double-strand break repair after photon and carbon ion irradiation of radioresistant HNSCC cells | |||||
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 |
Anne‑SophieWozny
× Anne‑SophieWozny× Alphonse, Gersende× Cassard, Audrey× Céline, Malésys× Louati, Safa× Beuve, Michael× Lalle, Philippe× Ardail, Dominique× Nakajima, Tetsuo× Claire, Rodriguez‑Lafrasse× Tetsuo, Nakajima |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | DNA double-strand breaks (DSBs) induced by photon irradiation are the most deleterious damage for cancer cells and their efficient repair may contribute to radioresistance, particularly in hypoxic conditions. Carbon ions (C-ions) act independently of the oxygen concentration and trigger complex- and clustered-DSBs difficult to repair. Understanding the interrelation between hypoxia, radiation-type, and DNA-repair is therefore essential for overcoming radioresistance. The DSBs signaling and the contribution of the canonical non-homologous end-joining (NHEJ-c) and homologous-recombination (HR) repair pathways were assessed by immunostaining in two cancer-stem-cell (CSCs) and non-CSCs HNSCC cell lines. Detection and signaling of DSBs were lower in response to C-ions than photons. Hypoxia increased the decay-rate of the detected DSBs (γH2AX) in CSCs after photons and the initiation of DSB repair signaling (P-ATM) in CSCs and non-CSCs after both radiations, but not the choice of DSB repair pathway (53BP1). Additionally, hypoxia increased the NHEJ-c (DNA-PK) and the HR pathway (RAD51) activation only after photons. Furthermore, the involvement of the HR seemed to be higher in CSCs after photons and in non-CSCs after C-ions. Taken together, our results show that C-ions may overcome the radioresistance of HNSCC associated with DNA repair, particularly in CSCs, and independently of a hypoxic microenvironment. | |||||
書誌情報 |
Scientific Reports 巻 10, p. 21357, 発行日 2020-12 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2045-2322 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1038/s41598-020-78354-7 | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://www.nature.com/articles/s41598-020-78354-7 |