介细胞性质瘤干细胞触发了由携带EGFR的细胞外囊泡刺激的静脉瘤独特的新血管化过程
Cristiana Spinelli1, Lata Adnani1, Brian Meehan1
1McGill University, The Research Institute of the McGill University Health Centre, Montreal, QC, Canada.
Nature communications
|April 3, 2024
概括
介细胞性质瘤干细胞通过细胞外囊转移EGFR的囊泡促进阴道化. 抑制内皮EGFR干扰了这一过程,并在质母细胞瘤模型中增强了抗VEGF治疗.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 血管生物学 血管生物学
背景情况:
- 针对质母细胞瘤 (GBM) 的新血管化是具有挑战性的,因为机制不太清楚.
- 瘤干细胞 (GSC) 的分子亚型影响着不同的内皮反应.
研究的目的:
- 研究不同的GSC亚型如何影响瘤血管.
- 识别驱动特定血管生长模式的机制,如输精管.
- 评估针对已识别的途径的治疗策略.
主要方法:
- 对不同的人类GSC分子亚型 (介质细胞与前神经) 的特征性内皮反应.
- 分析了细胞外囊泡 (EV) 介导的EGFR/EGFRvIII转录物从GSC转移到内皮细胞.
- 利用药理学 (达科米蒂尼布) 和基因 (基因编辑) 抑制内皮EGFR.
- 在体内评估EGFR和VEGF联合阻断的治疗疗效.
主要成果:
- 介酶体GSCs,但不是proneural,通过转移EGFR/EGFRvIII的EVs诱导阴道.
- 抑制内皮EGFR (药理或遗传) 消除了EV反应和体内输精.
- 结合EGFR和VEGF阻断在小鼠中显示出协同作用的抗癌效应,废除了输卵管,并延长了生存时间.
结论:
- 由细胞间EGFR转移通过EVs从间酶体GSC驱动的输血管,是GBM的一个子集中的一个独特的血管化机制.
- 向内皮细胞EGFR代表了对GBM的新治疗策略.
- 结合EGFR抑制与VEGF阻断,为GBM提供了增强的治疗潜力.
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