LGR5 regulates gastric adenocarcinoma cell proliferation and invasion via activating Wnt signaling pathway.

LGR5 regulates gastric adenocarcinoma cell proliferation and invasion via activating Wnt signaling pathway.
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LGR5通过激活Wnt信号通路调控胃腺癌细胞增殖和侵袭

DOI:
10.1038/s41389-018-0071-5
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发表时间:
2018-08-09
期刊:
影响因子:
6.2
通讯作者:
Wu C
Wu C
中科院分区:
医学1区
文献类型:
--
作者:
Wang X;Wang X;Liu Y;Dong Y;Wang Y;Kassab MA;Fan W;Yu X;Wu C

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LGR 5在胃肠道中的组织发育和成体干细胞的维持中起关键作用。然而,LGR 5在胃腺癌发展中的致癌作用仍然难以捉摸。在这里,我们发现LGR 5促进胃腺癌细胞增殖和转移。我们发现抑制剂C59敲低LGR 5或抑制Wnt信号通路可以阻止胃腺癌细胞的增殖和侵袭。此外,Wnt信号通路的激活剂Wnt 3a的处理部分恢复了在LGR 5敲低胃腺癌细胞中观察到的增殖缺陷。此外,LGR 5促进β-连环蛋白核积累,这是Wnt信号传导途径活化的替代标志物。此外,C59处理抑制Axin 2和TCF 1的转录,这两者都是胃腺癌细胞中β-catenin的靶基因。LGR 5过表达的胃腺癌细胞形成大量可见的肌动蛋白丝和伪足,表明LGR 5显著增强细胞运动能力,这可能使LGR 5表达增强的胃腺癌细胞获得侵袭和迁移能力。综上所述,我们的研究结果表明LGR 5通过激活Wnt/β-catenin信号通路促进胃腺癌细胞的增殖和侵袭。
LGR5 plays a critical role in tissue development and the maintenance of adult stem cells in gastrointestinal tract. However, the oncogenic role of LGR5 in the development of gastric adenocarcinoma remains elusive. Here, we show that LGR5 promotes gastric adenocarcinoma cell proliferation and metastasis. We find that knock down of LGR5 or suppression of Wnt signaling pathway by inhibitor C59 arrests gastric adenocarcinoma cell proliferation and invasion. Moreover, treatment of Wnt3a, the activator of Wnt signaling pathway, partially recovers the proliferation defect observed in LGR5 knockdown gastric adenocarcinoma cells. Moreover, LGR5 facilitates β-catenin nuclear accumulation, a surrogate marker of the activation of Wnt signaling pathway. In addition, C59 treatment suppresses transcription of Axin2 and TCF1, both of which are the target genes of β-catenin in gastric adenocarcinoma cells. Gastric adenocarcinoma cells with overexpressed LGR5 form a large quantity of visible actin filaments and pseudopods, suggesting that LGR5 significantly enhances the ability of cell movement, which might capacitate gastric adenocarcinoma cells with enhanced LGR5 expression to gain invasive and migratory properties. Taken together, our results show that LGR5 contributes to cell proliferation and invasion through the activation of Wnt/β-catenin-signaling pathway in gastric adenocarcinoma cells.
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