在肺癌细胞中,依赖于连体和整合素的机械敏感EGFR激活
Aneesa Shaikh1, Aarmann Mohan1, Milan Collins1
1Randall Centre for Cell & Molecular Biophysics, King's College London, London, UK.
Journal of cell science
|October 23, 2025
概括
皮表皮生长因子受体 (EGFR) 在早期细胞粘附期间通过增加细胞外矩阵刚度来激活,独立于连接体. 肺癌细胞中的这种机械感应作用促进了迁移,提供了新的治疗点.
科学领域:
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
- 生物物理学的生物物理.
背景情况:
- 皮表皮生长因子受体 (EGFR) 信号传递对细胞功能至关重要,并与癌症有关.
- 细胞外矩阵 (ECM) 刚性影响细胞行为和癌症进展.
- 在感知机械线索方面,EGFR的非法典性作用正在出现,但人们对其了解甚少.
研究的目的:
- 研究EGFR在早期细胞粘附过程中的机械感应中的非正规作用.
- 阐明刚性诱导EGFR激活的分子机制和功能后果.
主要方法:
- 使用了在不同硬度的ECM基板上培养的人类肺癌细胞 (1.5kPa vs. 28kPa).
- 评估了EGFR激活,Src活性,F-actin聚合和膜局部化.
- 研究了对正规配体和整体素的依赖性.
主要成果:
- 在粘附于更硬的ECM (28kPa) 时观察到EGFR激活,独立于正规配体和整体素.
- 机械诱导的EGFR激活需要活性Src和F-actin.
- EGFR以硬度依赖的方式局部化到等离子膜微域.
- 早期依赖硬度的EGFR激活对于增强细胞迁移至关重要.
结论:
- 在早期细胞对ECM的粘附过程中,EGFR作为非正规的机械传感器起作用.
- 由Src和F-actin介导的硬度诱导的EGFR激活增强了肺癌细胞迁移.
- 这一途径代表了肺癌治疗的潜在治疗标.
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