RIN1 promotes renal cell carcinoma malignancy by activating EGFR signaling through Rab25.

RIN1 promotes renal cell carcinoma malignancy by activating EGFR signaling through Rab25.
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RIN1 通过 Rab25 激活 EGFR 信号传导促进肾细胞癌恶性

DOI:
10.1111/cas.13297
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发表时间:
2017-08
期刊:
影响因子:
5.7
通讯作者:
Luo JH
Luo JH
中科院分区:
医学2区
文献类型:
--
作者:
Feng ZH;Fang Y;Zhao LY;Lu J;Wang YQ;Chen ZH;Huang Y;Wei JH;Liang YP;Cen JJ;Pan YH;Liao B;Chen W;Luo JH

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我们先前已发现RIN1表达在肾透明细胞癌(CcRCC)预后中的重要作用。RIN1在肾细胞癌恶性过程中的作用及其潜在的分子机制尚不清楚。在此,我们报告了肾细胞癌细胞和组织比正常对照组表达更多的RIN1。功能获得和功能丧失的研究表明,RIN1在体外增强了ccRCC细胞的生长、迁移和侵袭能力,在体内促进了肿瘤的生长和转移。机制研究表明,RIN1对ccRCC中的EGFR信号具有激活作用。此外,我们还揭示了在肾细胞癌中起关键作用的GTP酶Rab25作为RIN1的功能相互作用伙伴。Rab25基因的敲除消除了异位RIN1对癌细胞增殖、迁移和侵袭的促进作用。我们还证实了RIN1和Rab25的表达与来自TCGA的ccRCC患者的总体生存相关。提示RIN1通过与Rab25相互作用激活EGFR信号通路,在肾细胞癌的发生发展过程中发挥重要的致癌作用,RIN1可作为治疗肾细胞癌的有效靶点。
We previously identified the important role of RIN1 expression in the prognosis of clear cell renal cell carcinoma (ccRCC). The role of RIN1 in ccRCC malignancy and underlying molecular mechanisms remain unclear. Here we report that ccRCC cells and tissues expressed more RIN1 than normal controls. Gain‐of‐function and loss‐of‐function studies demonstrated that RIN1 enhanced ccRCC cell growth, migration and invasion abilities in vitro and promoted tumor growth and metastasis in vivo. Mechanistic studies revealed that RIN1 has an activating effect on EGFR signaling in ccRCC. In addition, we unveil Rab25, a critical GTPase in ccRCC malignancy, as a functional RIN1 interacting partner. Knockdown of Rab25 eliminated the augmentation of carcinoma cell proliferation, migration and invasion by ectopic RIN1. We also confirmed that RIN1 and Rab25 expression correlates with the overall‐survival of ccRCC patients from TCGA. These findings suggest that RIN1 plays an important oncogenic role in ccRCC malignancy by activation of EGFR signaling through interacting with Rab25, and RIN1 could be employed as an effective therapeutic target for ccRCC.
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