来自非小细胞肺癌细胞的分泌体通过部分内皮转移到介质细胞的过渡诱导内皮质可塑性
Clara Bourreau1,2, Emilie Navarro2, Marine Cotinat2
1Univ Angers, Inserm, CNRS, MINT, SFR ICAT, Angers, France.
Cancer medicine
|March 3, 2025
概括
肺瘤分泌体可以诱导内皮细胞 (ECs) 中的部分内皮细胞到介质酶过渡 (EndMT). 这项研究研究了不同肺瘤分泌物如何影响EC表型和可塑性,揭示了关键变化和潜在的治疗点.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
背景情况:
- 非小细胞肺癌 (NSCLC) 瘤微环境 (TME) 是复杂的,影响瘤生长和治疗耐药性.
- 在TME内的内皮细胞 (ECs) 可以经历内皮细胞到介质细胞的过渡 (EndMT),这有助于癌症的进展和治疗抵抗.
- 终结MT涉及ECs失去其内皮特征并获得介质细胞表型,促进癌症相关纤维细胞 (CAFs) 的发展.
研究的目的:
- 研究各种肺瘤秘密体对内皮细胞的表型和可塑性的影响.
- 了解暴露于不同瘤衍生因素如何影响内皮细胞行为和潜在的EndMT诱导.
主要方法:
- 条件介质 (CM) 由五种不同的NSCLC细胞系生成.
- 人类静脉内皮细胞 (HUVEC) 用这些CMs进行治疗.
- 试验包括扩散 (Cyquant),迁移 (Incucyte),管体生成 (Matrigel),表型标记物的流动细胞计,actin纤维的免疫组织化学,以及用于秘密蛋白质组分析的质谱学.
主要成果:
- 用瘤分泌物的治疗诱导了HUVECs显著的表型变化,其特征是变化的形态和增加的应力纤维表达.
- 观察到自发迁移和介质细胞标记物 (α-SMA,CD44) 的显著增加,证实了部分EndMT.
- 然而,表达内皮细胞和介质细胞标记物 (vWF+/α-SMA+或CD31+/CD44+) 的细胞的比例没有增加,这表明过渡不完整.
结论:
- 肺瘤分泌体可以诱导内皮细胞中部分内皮细胞转变为介质酶 (EndMT).
- 鉴定的表型和分子变化突出显示了TME内部EC的可塑性.
- 蛋白质组分析揭示了与EndMT相关的潜在治疗点,为未来的NSCLC治疗策略提供了途径.
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