FATS regulates polyamine biosynthesis by promoting ODC degradation in an ERβ-dependent manner in non-small-cell lung cancer.

FATS regulates polyamine biosynthesis by promoting ODC degradation in an ERβ-dependent manner in non-small-cell lung cancer.
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FATS 通过促进非小细胞肺癌中 ERβ 依赖方式的 ODC 降解来调节多胺生物合成。

DOI:
10.1038/s41419-020-03052-1
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发表时间:
2020-10-09
影响因子:
9
通讯作者:
Zhang J
Zhang J
中科院分区:
生物学1区
文献类型:
--
作者:
Qiu L;Hu L;Wang H;Li J;Ruan X;Sun B;Zhi J;Zheng X;Gu L;Gao M;Kong P;Zhang J

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多胺生物合成是非小细胞肺癌(NSCLC)细胞生长和分化的重要代谢途径。脆性位点相关肿瘤抑制基因(FATS)是一个新发现的与肿瘤相关的基因。我们以前的研究结果表明,脂肪介导的p53的多聚泛素化促进p53的激活,以响应DNA损伤;然而,很少有人知道脂肪酸在代谢重编程在非小细胞肺癌的作用。在本研究中,与配对的相邻正常组织相比,观察到FATS在NSCLC组织中显著下调,并且与NSCLC患者的生存相关。我们进一步表明,肿瘤抑制因子FATS在NSCLC细胞中的存在通过诱导促死亡自噬而导致细胞凋亡。此外,FATS通过在蛋白质和mRNA水平上抑制鸟氨酸脱羧酶(ODC)而被证明是多胺生物合成的抑制剂,这部分依赖于雌激素受体(ER)。此外,观察到FATS与ERβ结合并移位至胞质溶胶,导致ODC降解。我们的研究结果表明,FATS在NSCLC的多胺代谢中起着重要作用,并为NSCLC的进展提供了新的视角。
Polyamine biosynthesis is an essential metabolic pathway for cell growth and differentiation in non-small-cell lung cancer (NSCLC). Fragile-site associated tumour suppressor (FATS) is a novel gene involved in cancer. The results of our previous study showed that FATS-mediated polyubiquitination of p53 promotes the activation of p53 in response to DNA damage; however, little is known about the role of FATS in metabolic reprogramming in NSCLC. In the present study, FATS was observed to be significantly downregulated in NSCLC tissues compared with paired adjacent normal tissues and was associated with the survival of NSCLC patients. We further showed that the presence of the tumour suppressor FATS in NSCLC cells led to apoptosis by inducing pro-death autophagy. In addition, FATS was shown to function as a suppressor of polyamine biosynthesis by inhibiting ornithine decarboxylase (ODC) at the protein and mRNA levels, which was partially dependent on oestrogen receptor (ER). Furthermore, FATS was observed to bind to ERβ and translocate to the cytosol, leading to ODC degradation. The findings of our study demonstrate that FATS plays important roles in polyamine metabolism in NSCLC and provides a new perspective for NSCLC progression.
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