在单分子和单囊分辨率下研究的WNT5a对细胞外囊泡的输出
Antonia Schubert1,2,3,4,5, Ajaree Mongkolsittisilp6, Andrei Kobitski6
1Division Signaling and Functional Genomics, German Cancer Research Center (DKFZ), Heidelberg, Germany.
The FEBS journal
|April 1, 2025
概括
在癌症中至关重要的WNT5a蛋白通过细胞外囊泡 (EVs) 传播. 这项研究表明,大多数WNT5a仍然是自由的,而不是EV结合的,影响癌细胞的侵入性.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物物理学的生物物理.
背景情况:
- WNT信号传递对细胞和组织功能至关重要,但其调节失调会导致癌症等疾病.
- 包括WNT5a在内的WNT蛋白质具有疏水性,并利用细胞外囊泡 (EVs) 等载体进行细胞间传输.
- WNT5a异型 (WNT5aS和WNT5aL) 在癌症中表现出上下文依赖的作用,可能是由于差异信号或传输.
研究的目的:
- 为了研究WNT5a异型的分泌和细胞外运输机制.
- 确定WNT5a与不同细胞外囊 (EV) 分数和其他分泌实体的关联.
- 分析携带WNT5a EVs的生物物理特性及其对癌细胞行为的影响.
主要方法:
- 为WNT5a异型 (WNT5aS,WNT5aL) 开发光蛋白 (FP) 融合结构.
- 功能报告测试用于评估WNT信号抑制和癌细胞侵入性.
- 先进的生物物理技术:光强度分布分析 (FIDA) 和光相关谱 (FCS) 用于单分子分析.
- 超离心以分离EV分数和EV大小和WNT5a负载的表征.
主要成果:
- 发现WNT5a的两种异型都抑制了正规的WNT信号传递.
- 携带WNT5a异型的EV诱导了MCF7乳腺癌细胞的侵入性.
- 单分子分析显示,WNT5aL的大多数仍然是单质的,并且在上浮体中是自由的,只有很小的一小部分与EVs相关.
- 电动汽车尺寸分布和每辆电动汽车WNT5a负载能力的特征.
结论:
- WNT5a异型可以通过EV传输,从而影响癌细胞的侵入性.
- 很大一部分WNT5a在细胞外环境中独立存在于EVs.
- 对WNT5a相关实体的详细生物物理表征对于了解其货物负载和疾病中的上下文依赖信号至关重要.
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