p120 RasGAP和ZO-2对于Hippo信号和瘤抑制功能至关重要,这些功能由p190A RhoGAP介导
bioRxiv : the preprint server for biology
|June 9, 2023
概括
p190A RhoGAP (ARHGAP35) 通过与RasGAP和ZO-2相互作用,以激活Hippo通路,抑制细胞增殖和抑制瘤,充当瘤抑制剂. 低ARHGAP35表达与特定患者群体的生存率下降相关.
科学领域:
- 细胞生物学 细胞生物学
- 癌症生物学 癌症生物学
- 分子瘤学分子瘤学
背景情况:
- 编码p190A RhoGAP (p190A) 的ARHGAP35是一种关键的癌症基因和已知的瘤抑制剂.
- p190A激活Hippo通路,最初通过与p120 RasGAP (RasGAP) 的相互作用来确定.
研究的目的:
- 为了研究p190A与紧结关联蛋白的新型相互作用.
- 确定RasGAP和ZO-2在p190A介导的Hippo通路激活和瘤抑制中的作用.
- 探索ARHGAP35和TJP2 (ZO-2) 表达在患者生存中的临床相关性.
主要方法:
- 同免疫沉测试以确定蛋白质相互作用.
- 基于细胞的测试来评估Hippo路径激活 (LATS激酶活性).
- 功能性测定测量介质细胞到上皮细胞的过渡,接触抑制和瘤生长.
- 基于ARHGAP35和TJP2转录水平的患者生存数据的分析.
主要成果:
- 确定了p190A和ZO-2之间的新型相互作用,依赖于RasGAP.
- 拉斯GAP和ZO-2都对p190A来激活LATS激酶,诱导MET,促进接触抑制和抑制瘤发生至关重要.
- 对于p190A的转录调制,RasGAP和ZO-2也是需要的.
- 低ARHGAP35表达预测高TJP2 (ZO-2) 转录水平的患者的生存时间更短.
结论:
- 定义了p190A的瘤抑制器相互作用体,涉及ZO-2和RasGAP.
- 证明RasGAP对于p190A来激活LATS激酶至关重要,尽管它已知与Ras信号的关联.
- 突出了ARHGAP35-ZO-2相互作用对患者生存结果的临床相关性.
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