Polarity protein Canoe mediates overproliferation via modulation of JNK, Ras-MAPK and Hippo signalling.

Polarity protein Canoe mediates overproliferation via modulation of JNK, Ras-MAPK and Hippo signalling.
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极性蛋白 Canoe 通过调节 JNK、Ras-MAPK 和 Hippo 信号传导介导过度增殖。

DOI:
10.1111/cpr.12529
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发表时间:
2019-01
期刊:
影响因子:
8.5
通讯作者:
Song H
Song H
中科院分区:
生物学1区
文献类型:
--
作者:
Ma Z;Li P;Hu X;Song H

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在过去的十年里,细胞极性和肿瘤发生之间的有趣联系已经出现。有助于形成和维持细胞极性的连接复合物的多个核心组分以背景依赖性方式显示促肿瘤发生和抗肿瘤发生功能,其潜在机制知之甚少。与过表达或敲除特定信号传导成分的转基因果蝇品系,我们进行遗传分析,以调查极性蛋白独木舟(Cno)在肿瘤发生和下游途径中的确切作用。我们发现cno的过度表达同时激活JNK和Ras‐MEK‐ERK信号传导,导致果蝇翅盘中过度增殖和细胞死亡的混合表型。JNK激活的适度缓解消除了Cno对细胞死亡的影响,导致器官过度生长和细胞迁移,模拟肿瘤的形成和侵袭。此外,我们发现Hippo通路在JNK和Ras信号传导的下游起作用,以介导Cno对细胞增殖的影响。我们的工作揭示了Cno的致癌作用,并为癌症研究创造了一种新型的果蝇肿瘤模型。
Over the past decade an intriguing connection between cell polarity and tumorigenesis has emerged. Multiple core components of the junction complexes that help to form and maintain cell polarity display both pro‐ and anti‐tumorigenic functions in a context‐dependent manner, with the underlying mechanisms poorly understood. With transgenic fly lines that overexpress or knock down specific signalling components, we perform genetic analysis to investigate the precise role of the polarity protein Canoe (Cno) in tumorigenesis and the downstream pathways. We show that overexpression of cno simultaneously activates JNK and Ras‐MEK‐ERK signalling, resulting in mixed phenotypes of both overproliferation and cell death in the Drosophila wing disc. Moderate alleviation of JNK activation eliminates the effect of Cno on cell death, leading to organ overgrowth and cell migration that mimic the formation and invasion of tumours. In addition, we find that the Hippo pathway acts downstream of JNK and Ras signalling to mediate the effect of Cno on cell proliferation. Our work reveals an oncogenic role of Cno and creates a new type of Drosophila tumour model for cancer research.
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