RICH2, a potential tumor suppressor in hepatocellular carcinoma.

RICH2, a potential tumor suppressor in hepatocellular carcinoma.
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RICH2,肝细胞癌中的潜在肿瘤抑制因子。

DOI:
10.2741/4784
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发表时间:
2019-06
期刊:
Front Biosci (Landmark Ed)
影响因子:
--
通讯作者:
Zhang Wei
Zhang Wei
中科院分区:
其他
文献类型:
--
作者:
Zhang Jiarui;Yang Chen;Gong Li;Zhu Shaojun;Tian Jing;Zhang Fuqin;Zhu Qiao;Wang Jun;Lan Miao;Li Yanhong;Zhang Wei

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Rho GTP酶激活蛋白(RhoGAP)参与肝细胞癌(HCC)的发生和进展。我们测试了RICH 2是HCC中的肿瘤抑制因子的想法。与此一致,RICH 2在HCC和HCC细胞系中下调,并且RICH 2表达与HCC中的肿瘤大小、TNM分期和转移呈负相关。RICH 2以Cdc 42依赖的方式调节肝癌丝状伪足的形成,稳定过表达RICH 2可显著抑制肝癌细胞的克隆形成、增殖和侵袭。基因集富集分析(GSEA)显示RICH 2的表达与WNT 5a的表达呈正相关,而RICH 2的表达与β-catenin(CTNNB 1)的表达呈负相关,后者参与HCC的增殖和侵袭。这些发现与RICH 2与内源性Cdc 42、Rac 1和β-连环蛋白的免疫共沉淀一致。最后,RICH 2过表达抑制体内肿瘤生长。这些发现支持RICH 2可能在HCC中作为肿瘤抑制因子的想法。
Rho GTPase-activating proteins (RhoGAPs) are implicated in the development and progression of hepatocellular carcinoma (HCC). We tested the idea that RICH2 is a tumor suppressor in HCC. Consistent with this, RICH2 was downregulated in HCC and HCC cell lines and RICH2 expression negatively correlated with the tumor size, TNM stage and metastasis in HCC. RICH2, in a Cdc42 dependent manner, regulated the formation of filopodia in HCC and stable overexpression of RICH2 significantly inhibited the clone formation, proliferation and invasion of HCC cells in vitro. Gene set enrichment analysis (GSEA) showed that the expression of RICH 2 positively correlated with the expression of WNT5a, that exert antagonistic effect on canonical WNT signalling whereas RICH2 expression inversely correlated with the expression of β-catenin (CTNNB1), that is involved in the proliferation and invasion HCC. These findings concurred with co-immunoprecipation of RICH2 with endogenous Cdc42, Rac1, and β-catenin. Finally, RICH2 overexpression suppressed tumor growth in vivo. The findings support the idea that RICH2 might act as a tumor suppressor in HCC.
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