RAP2 GTPase与细胞骨在Hippo管道调节中的相互作用
Chenzhou Wu1,2, Xiaomin Cai1,2, Ying Wang1,2
1Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
bioRxiv : the preprint server for biology
|October 24, 2023
概括
RAP2 GTPase集成细胞骨信号来调节Hippo信号,影响器官大小和癌症. 它的缺失破坏了细胞对机械线索的反应,影响了像LATS1/2.2.这样的关键激酶.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 信号传输 信号传输
背景情况:
- 河马信号通路对于器官大小控制,再生和癌症发展至关重要.
- 细胞骨动力学已知是河马信号的调节器,但确切的机制尚不清楚.
- RAP2 GTPase通过核心激酶将机械刺激与Hippo信号连接起来.
研究的目的:
- 阐明RAP2 GTPase与Hippo信号传递中的细胞骨之间的相互调节机制.
- 研究RAP2在调解细胞对影响细胞骨的外部线索的细胞反应中的作用.
主要方法:
- 利用RAP2淘汰细胞来评估Hippo通路对RhoA GTPase抑制和actin细胞骨破坏的反应.
- 采用RNA测序来分析与RAP2缺乏细胞中的actin和微管网相关的差异性基因表达.
- 研究了微管稳定剂Taxol对RAP2和MAP4K淘汰细胞中的LATS1/2激活和细胞生长的影响.
主要成果:
- 删除RAP2损害了Hippo通路的激活,以应对能量压力和血清剥夺,与RhoA和actin重塑有关.
- 罗亚抑制剂和动因干扰剂未能在RAP2缺乏细胞中激活LATS1/2,突出显示RAP2的必要性.
- RAP2缺乏改变了actin和微管网,Taxol在激活LATS1/2和抑制生长的有效性降低了.
结论:
- RAP2 GTPase 在Hippo信号通路中充当细胞骨信号的中心集成者.
- 这些发现揭示了关于细胞骨对Hippo路径调节的新见解.
- 这项研究提出了针对RAP2的潜在治疗策略,用于希波受损癌症.
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