通过EGFR-VAV2-Rac1通路传递细胞迁移信号的细胞迁移信号在内分泌体中持续存在
Itziar Pinilla-Macua1, Sachin Surve1, Alexander Sorkin1
1Department of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.
Journal of cell science
|January 2, 2025
概括
皮表皮生长因子受体 (EGFR) 信号持续存在内体中,驱动细胞迁移. 这一途径涉及VAV2和Rac1,对于头癌细胞的移动和转移至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
- 分子信号传输的方法
背景情况:
- 皮表皮生长因子受体 (EGFR) 激活启动信号级联,调节细胞运动.
- 在激活时EGFR会经历内细胞分裂,但该过程在细胞迁移中的作用尚不清楚.
- 瓜核酸交换因子VAV2与癌症转移有关,并且与头癌的预后不佳有关.
研究的目的:
- 为了研究EGFR内细胞在细胞迁移中的作用.
- 为了阐明VAV2和Rac1在EGFR介导的细胞运动中的参与.
- 为了确定在EGFR激活过程中,信号通路是否在内体内持续存在.
主要方法:
- 活细胞显微镜对基因组编辑的人口状细胞癌 (HSC3) 细胞的成像.
- 与EGFR相关的内源光标记VAV2和Rac1的跟踪.
- 在影响内细胞形成的条件下,对EGF梯度的反应中细胞迁移的评估.
主要成果:
- VAV2和EGFR在HSC3细胞中共内细胞化,这是头癌的一个模型.
- 由EGFR驱动的化学转移需要VAV2和克拉特林介导的内细胞分裂.
- 持续的Rac1激活,对于迁移至关重要,依赖于克拉特林,并且发生在含EGFR的内分泌体上.
结论:
- 通过VAV2-Rac1通路传递EGFR信号的过程在内分泌体内继续进行.
- 内体EGFR信号传递对于驱动头癌细胞迁移至关重要.
- 这一发现突出了由内分泌体持续发出信号,调节癌细胞运动的新机制.
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