CDP138 silencing inhibits TGF-β/Smad signaling to impair radioresistance and metastasis via GDF15 in lung cancer.

CDP138 silencing inhibits TGF-β/Smad signaling to impair radioresistance and metastasis via GDF15 in lung cancer.
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CDP138 沉默抑制 TGF-β/Smad 信号传导,通过 GDF15 损害肺癌的放射抗性和转移

DOI:
10.1038/cddis.2017.434
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发表时间:
2017-09-07
影响因子:
9
通讯作者:
Xu S
Xu S
中科院分区:
生物学1区
文献类型:
--
作者:
Lu Y;Ma J;Li Y;Huang J;Zhang S;Yin Z;Ren J;Huang K;Wu G;Yang K;Xu S

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CDP 138是CDK 5结合伴侣,调节细胞增殖和迁移。然而,CDP 138在这些过程中发挥作用的机制仍不清楚。在这项研究中,我们发现CDP 138经常过表达,并且高水平的CDP 138与肺癌的淋巴结转移相关。此外,我们提供的证据表明,CDP 138耗尽肺癌细胞表现出增强的放射敏感性,以及减少迁移和侵袭。从机制上讲,我们将TGF-β超家族成员GDF 15鉴定为CDP 138的关键下游效应子。⑶ P138沉默至少部分地通过⑶ F15的下调来减弱TGF-β/Smad信号传导激活。更重要的是,观察到的由CDP 138敲低引起的表型部分依赖于GDF 15抑制。总之,我们的研究结果表明,CDP 138通过GDF 15正向调节TGF-β/Smad信号通路,以促进辐射抗性和转移,表明CDP 138作为潜在的致癌生物标志物和有希望的治疗靶点用于治疗肺癌。
CDP138, a CDK5 binding partner, regulates cell proliferation and migration. However, the mechanisms by which CDP138 functions in these processes remain unclear. In this study, we show that CDP138 is frequently overexpressed and that high levels of CDP138 are correlated with lymph node metastasis in lung cancer. Furthermore, we provide evidence that CDP138-depleted lung cancer cells exhibit enhanced radiosensitivity as well as reduced migration and invasion. Mechanistically, we identify GDF15, a member of the TGF-β superfamily, as a key downstream effector of CDP138. CDP138 silencing attenuates TGF-β/Smad signaling activation at least in part through the downregulation of GDF15. More importantly, the observed phenotypes caused by CDP138 knockdown are partially dependent on GDF15 inhibition. Together, our findings demonstrate that CDP138 positively modulates the TGF-β/Smad signaling pathway via GDF15 to promote radioresistance and metastasis, suggesting CDP138 as a potential oncogenic biomarker and a promising therapeutic target in the treatment of lung cancer.
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