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球体间的近距离和矩阵重塑决定了与癌症相关的纤维细胞介导癌细胞入侵
Pranav Mehta1, Ankur Deep Bordoloi2, Cor Ravensbergen3
1Department of Cell and Chemical Biology and Oncode Institute, Leiden University Medical Center, Leiden, the Netherlands; Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ, Delft, the Netherlands.
Acta biomaterialia
|November 21, 2025
概括
与癌症相关的纤维细胞 (CAFs) 在乳腺癌细胞入侵之前重塑细胞外基质 (ECM). 向CAF可能通过破坏CAF驱动的ECM重塑和细胞扩散来提供治疗效益.
科学领域:
- 在瘤学瘤学.
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
背景情况:
- 乳腺癌亚型表现出多样化的临床行为; Luminal A,通常是惰的,当与α-平滑肌动蛋白 (α-SMA) 阳性癌症相关纤维细胞 (CAF) 相结合时,可以变得具有攻击性.
- 在Luminal A乳腺癌中,CAFs促进瘤入侵和细胞外基质 (ECM) 重塑的精确生物物理机制仍然不完全理解.
- CAF-ECM和CAF-癌细胞相互作用的时间和空间动态在很大程度上是未知的,质疑这些过程是决定性的还是随机的.
研究的目的:
- 为了研究CAF驱动的入侵和ECM重塑Luminal A乳腺癌背后的生物物理机制.
- 阐明CAF与原基质和癌细胞球体相互作用的时间和空间动态.
- 确定ECM重塑和矩阵金属蛋白酶 (MMP) 活性在癌细胞球状扩张和扩散中的不同作用.
主要方法:
- 对Luminal A瘤进行组织学分析,以检查CAF,癌细胞和ECM组织.
- 在一个原I水凝中使用共嵌入的乳腺CAF (19TT) 和发光乳腺癌球体 (MCF7) 开发一个3D体外模型.
- 时间间隔成像和广谱矩阵金属蛋白酶 (MMP) 抑制以评估球状行为,ECM重塑和细胞扩散.
主要成果:
- 发现球体间距离对CAF诱导的癌细胞球体行为产生了重大影响.
- 观察到CAF介导的原基质重塑和降解会先于癌细胞球状体的破坏,并促进球状体的扩张和传播.
- 虽然MMP抑制减少了CAF驱动的原降解和球状膨胀,但它并没有阻碍ECM重塑,CAF迁移或单细胞扩散.
结论:
- 在迁移和MMP介导的降解之前,CAFs重塑原基质,影响乳腺癌细胞入侵.
- 癌细胞的球状扩张 (依赖于矩阵完整性) 和单细胞传播 (依赖于CAF驱动的重塑) 受到不同的机制的控制.
- 这些发现强调了CAF-ECM相互作用在乳腺癌进展中的关键作用,并建议针对CAF的潜在治疗策略.
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