Transcriptional coregualtor NUPR1 maintains tamoxifen resistance in breast cancer cells.

Transcriptional coregualtor NUPR1 maintains tamoxifen resistance in breast cancer cells.
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转录核心调控因子 NUPR1 维持乳腺癌细胞对他莫昔芬的耐药性

DOI:
10.1038/s41419-021-03442-z
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发表时间:
2021-02-04
影响因子:
9
通讯作者:
Ma Z
Ma Z
中科院分区:
生物学1区
文献类型:
--
作者:
Wang L;Sun J;Yin Y;Sun Y;Ma J;Zhou R;Chang X;Li D;Yao Z;Tian S;Zhang K;Liu Z;Ma Z

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为了维持细胞内稳态和减轻化疗应激,癌细胞必须获得一系列适应性细胞内过程。在这里,我们确定NUPR 1,他莫昔芬(Tam)诱导的转录辅助调节因子,是必要的Tam耐药的维护,通过物理相互作用与ESR 1在乳腺癌。NUPR 1与BECN 1、GREB 1、RAB 31、PGR、CYP 1B 1等参与自噬和耐药的基因的启动子区结合,调控其转录。在TAM耐药的ESR 1乳腺癌细胞中,NUPR 1缺失导致体外过早衰老和体内肿瘤抑制。此外,强制自噬通量增强NUPR 1耗尽的Tam抗性细胞的细胞质空泡化,这有利于从自噬存活到早衰的过渡。总的来说,这些发现表明NUPR 1作为转录辅助调节因子在乳腺癌的内分泌持久性中起着关键作用,从而为内分泌抵抗提供了脆弱的诊断和/或治疗靶点。
To support cellular homeostasis and mitigate chemotherapeutic stress, cancer cells must gain a series of adaptive intracellular processes. Here we identify that NUPR1, a tamoxifen (Tam)-induced transcriptional coregulator, is necessary for the maintenance of Tam resistance through physical interaction with ESR1 in breast cancers. Mechanistically, NUPR1 binds to the promoter regions of several genes involved in autophagy process and drug resistance such as BECN1, GREB1, RAB31, PGR, CYP1B1, and regulates their transcription. In Tam-resistant ESR1 breast cancer cells, NUPR1 depletion results in premature senescence in vitro and tumor suppression in vivo. Moreover, enforced-autophagic flux augments cytoplasmic vacuolization in NUPR1-depleted Tam resistant cells, which facilitates the transition from autophagic survival to premature senescence. Collectively, these findings suggest a critical role for NUPR1 as a transcriptional coregulator in enabling endocrine persistence of breast cancers, thus providing a vulnerable diagnostic and/or therapeutic target for endocrine resistance.
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