p120 RasGAP和ZO-2对于Hippo信号传递和由p190A RhoGAP介导的瘤抑制功能至关重要
Hanyue Ouyang1, Shuang Wu2, Wangji Li3
1GI Cell Biology Laboratory, Boston Children's Hospital, Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA; State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, P.R. China.
Cell reports
|November 23, 2023
概括
通过激活Hippo通路,ARHGAP35 (p190A) 起到瘤抑制作用. 它与RasGAP和ZO-2的相互作用对于瘤抑制和细胞增殖控制至关重要,影响患者的生存.
科学领域:
- 分子生物学分子生物学
- 癌症生物学 癌症生物学
- 细胞信号传递 细胞信号传递
背景情况:
- ARHGAP35编码p190A RhoGAP (p190A),这是一个已知的瘤抑制剂.
- p190A激活Hippo通路,最初通过与p120 RasGAP (RasGAP) 结合来确定.
研究的目的:
- 调查p190A与ZO-2的相互作用及其对RasGAP的依赖.
- 阐明RasGAP和ZO-2在p190A介导的瘤抑制中的作用.
主要方法:
- 同免疫沉试验用于研究蛋白质相互作用.
- 功能性测试以评估Hippo通路激活,细胞增殖和上皮细胞-介质细胞过渡.
- 基于基因表达水平的患者生存数据的分析.
主要成果:
- p190A与ZO-2的相互作用取决于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至关重要.
- 对于p190A的转录调节,需要RasGAP和ZO-2.
- 低ARHGAP35表达与高TJP2 (ZO-2) 转录水平的患者的生存时间较短相关.
结论:
- 定义了一种新型的p190A瘤抑制器相互作用体,涉及ZO-2和RasGAP.
- 对于p190A来说,RasGAP对于激活LATS激酶至关重要,独立于其正规的Ras信号传递作用.
- 这些发现强调了p190A-RasGAP-ZO-2轴在癌症进展和患者结局中的临床相关性.
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