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Updated: Jan 7, 2026

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Evaluation of the Storage Stability of Extracellular Vesicles
Published on: May 22, 2019
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大型细胞外囊泡通过对和自身信号调节内皮血管生成潜力
bioRxiv : the preprint server for biology
|December 25, 2025
概括
黑色素瘤大细胞外囊泡 (L-EVs) 通过调节内皮细胞来促进耐治疗的血管生成. 这些含有VEGF的L-EVs驱动瘤生长,并且是sorafenib的目标,而不是SU5416.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 瘤生长依赖于血管生成,这种过程通常由瘤分泌的细胞外囊泡 (EVs) 介导.
- 晚期黑色素瘤对像贝瓦西祖马布这样的抗血管性疗法表现出耐药性,因此需要对潜在机制有更深入的了解.
- 细胞外囊泡 (EVs) 对于细胞间通信至关重要,小EVs (sEVs) 和大EVs (L-EVs) 在尺寸和功能上有所不同.
研究的目的:
- 调查黑色素瘤衍生的大型细胞外囊泡 (L-EVs) 在促进血管生成和抗血管生成疗法耐药性的作用.
- 阐明L-EVs诱导内皮血管新生表型的机制,并确定潜在的治疗点.
主要方法:
- 黑色素瘤衍生的L-EV及其载荷的特征,包括VEGF.
- 在体外评估L-EVs对内皮细胞管形成的影响.
- 评估L-EV介导血管生成对索拉芬尼和SU5416等抑制剂的敏感性.
- 分析黑色素瘤L-EVs对内皮细胞分泌物的调节.
主要成果:
- 黑色素瘤衍生的L-EVs独特地促进了对贝瓦西祖马布不敏感的内皮血管新生表型.
- 由L-EV诱导的内皮管形成被sorafenib抑制,但不是SU5416.
- 黑色素瘤L-EVs含有VEGF,并通过分泌因子 (VEGF,IL-8,MIF,PAI-1) 在内皮细胞中诱导自身隐性信号.
- EV亚型在血管生成中表现出不同的作用,在不同瘤类型中存在差异.
结论:
- 黑色素瘤L-EV在驱动血管生成和促进治疗耐药性方面发挥着重要作用.
- 准L-EV或它们的下游信号通路,可能使用像索拉芬尼布这样的多酶抑制剂,可以克服治疗耐药性.
- 了解EV亚型的差异功能对于开发有效的癌症疗法至关重要.
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