Activating transcription factor 5 enhances radioresistance and malignancy in cancer cells.

Activating transcription factor 5 enhances radioresistance and malignancy in cancer cells.
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DOI:
10.18632/oncotarget.2912
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发表时间:
2015-03-10
期刊:
影响因子:
--
通讯作者:
Haga H
Haga H
中科院分区:
其他
文献类型:
--
作者:
Ishihara S;Yasuda M;Ishizu A;Ishikawa M;Shirato H;Haga H

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放射疗法对治疗各种类型的肿瘤都有效。然而,一些癌细胞在照射后存活,并以与不良预后相关的高度恶性表型重新填充肿瘤。目前还不清楚癌细胞如何在辐射后存活并产生恶性肿瘤。在这里,我们表明,激活转录因子5(ATF 5)促进辐射后的癌细胞的辐射抗性和恶性。在细胞周期的G1-S期,癌细胞表达高水平的ATF 5,其促进细胞周期进展,从而增加放射抗性。此外,ATF 5在体外和体内增加癌细胞中的恶性表型,如细胞生长和侵袭性。我们已经确定了辐射后高度恶性肿瘤再生的新机制,并表明ATF 5在此过程中起着关键作用。
Radiotherapy is effective for treating various types of tumors. However, some cancer cells survive after irradiation and repopulate tumors with highly malignant phenotypes that correlate with poor prognosis. It is not known how cancer cells survive and generate malignant tumors after irradiation. Here, we show that activating transcription factor 5 (ATF5) promotes radioresistance and malignancy in cancer cells after irradiation. In the G1-S phase of the cell cycle, cancer cells express high levels of ATF5, which promotes cell cycle progression and thereby increases radioresistance. Furthermore, ATF5 increases malignant phenotypes, such as cell growth and invasiveness, in cancer cells in vitro and in vivo. We have identified a new mechanism for the regeneration of highly malignant tumors after irradiation and shown that ATF5 plays a key role in the process.
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