CRSP8 promotes thyroid cancer progression by antagonizing IKKα-induced cell differentiation.

CRSP8 promotes thyroid cancer progression by antagonizing IKKα-induced cell differentiation.
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CRSP8通过拮抗IKKα诱导的细胞分化促进甲状腺癌进展

DOI:
10.1038/s41418-020-00656-0
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发表时间:
2021-04
影响因子:
12.4
通讯作者:
Deng W
Deng W
中科院分区:
生物学1区
文献类型:
--
作者:
Liao Y;Hua Y;Li Y;Zhang C;Yu W;Guo P;Zou K;Li W;Sun Y;Wang R;Zuo Y;Sui S;Tian C;Hao J;Chen M;Hu S;Chen M;Long Q;Wang X;Zou L;Xie F;Guo W;Deng W

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CRSP8 通过与各种 DNA 结合反式激活因子直接相互作用,在招募基因介质中发挥着重要作用。在这项研究中,我们发现了 CRSP8 通过靶向 IKKα 信号传导抑制甲状腺癌分化和促进甲状腺癌进展的独特功能。 CRSP8在人类甲状腺癌细胞和组织中高表达,尤其是在甲状腺未分化癌(ATC)中。 CRSP8的敲低抑制了ATC细胞的细胞生长、迁移、侵袭、干性,并诱导细胞凋亡和分化,而其过表达在分化的甲状腺癌(DTC)细胞中表现出相反的作用。从机制上讲,CRSP8 通过与 IKKα 启动子区域(-257 至 -143)结合来负向调节其转录,从而下调 IKKα 表达。 IKKα 的敲低或过表达显着逆转了 ATC 或 DTC 细胞中 CRSP8 敲低或过表达介导的分化和 EMT 相关标志物的表达变化以及细胞生长变化。体内研究还证实,在人类 ATC 小鼠模型中,CRSP8 敲低可通过上调 IKKα 信号传导来抑制甲状腺癌的生长。此外,我们发现 CRSP8 调节甲状腺癌细胞对化疗药物(包括顺铂和表柔比星)的敏感性。总的来说,我们的结果表明 CRSP8 作为 IKKα 信号传导的调节剂和甲状腺癌分化的抑制剂发挥作用,这表明通过针对 CRSP8/IKKα 通路来治疗 ATC 是一种潜在的治疗策略。
CRSP8 plays an important role in recruiting mediators to genes through direct interaction with various DNA-bound transactivators. In this study, we uncovered the unique function of CRSP8 in suppressing thyroid cancer differentiation and promoting thyroid cancer progression via targeting IKKα signaling. CRSP8 was highly expressed in human thyroid cancer cells and tissues, especially in anaplastic thyroid cancer (ATC). Knockdown of CRSP8 suppressed cell growth, migration, invasion, stemness, and induced apoptosis and differentiation in ATC cells, while its overexpression displayed opposite effects in differentiated thyroid cancer (DTC) cells. Mechanistically, CRSP8 downregulated IKKα expression by binding to the IKKα promoter region (−257 to −143) to negatively regulate its transcription. Knockdown or overexpression of IKKα significantly reversed the expression changes of the differentiation and EMT-related markers and cell growth changes mediated by CRSP8 knockdown or overexpression in ATC or DTC cells. The in vivo study also validated that CRSP8 knockdown inhibited the growth of thyroid cancer by upregulating IKKα signaling in a mouse model of human ATC. Furthermore, we found that CRSP8 regulated the sensitivity of thyroid cancer cells to chemotherapeutics, including cisplatin and epirubicin. Collectively, our results demonstrated that CRSP8 functioned as a modulator of IKKα signaling and a suppressor of thyroid cancer differentiation, suggesting a potential therapeutic strategy for ATC by targeting CRSP8/IKKα pathway.
全反式视黄酸和三氧化二砷未能抑制急性早幼粒细胞白血病细胞中的单核细胞分化驱动因子 Irf8
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