与瘤相关的巨细胞在细胞外囊中显示差异性蛋白质载荷分类,与卵巢癌的生存率差相关
Johanna Pörschke1, Sophie Heidemann2, Hannah P Nehring1,3
1Institute for Tumor Immunology, Center for Tumor Biology and Immunology (ZTI), Philipps-Universität, Marburg, 35043, Germany.
Molecular medicine (Cambridge, Mass.)
|January 30, 2026
概括
卵巢癌的瘤相关巨细胞 (TAMs) 释放出具有独特蛋白质载荷的独特的细胞外囊泡 (EVs). 这些TAM衍生的EV携带与预后不佳相关的生物标志物,提供新的诊断和治疗点.
科学领域:
- 免疫学和癌症生物学
- 细胞外囊泡 细胞外囊泡
- 瘤微环境 瘤微环境
背景情况:
- 卵巢癌 (OC) 中的酸液是瘤微环境 (TME) 的关键组成部分.
- 与瘤相关的巨细胞 (TAMs) 是OC骨内丰富的免疫细胞.
- 对于TAMs对OC炎的细胞外囊泡 (EV) 区的贡献尚不清楚.
研究的目的:
- 调查不同的巨细胞亚型,包括TAM类巨细胞,如何对卵巢癌的EV概况作出贡献.
- 与其他两极分化的巨亚型相比,描述TAM类巨的EV释放和载荷.
- 确定潜在的EV相关生物标志物用于OC诊断和预后.
主要方法:
- 来自健康捐赠者的单细胞分化为单细胞衍生的巨细胞 (MDMs),并分化为M1-样,M2-样和TAM-样表型.
- 从这些巨细胞亚型的条件介质中分离出了EV.
- 使用纳米流细胞计,基于无标签质谱的蛋白质组学和电子显微镜来表征电动汽车.
主要成果:
- 与M1类和M2类巨细胞相比,TAM类巨细胞的小EV释放量减少,氨酸阳性颗粒较少.
- 来自TAM类巨细胞的EVs表现出改变的生物发生标记物和降低CD63的N-糖化,在患者样本中得到验证.
- 由TAM衍生的EVs的蛋白质组富含支持和抗炎分子,像CD163,MRC1,COLEC12和MSR1这样的标记物显示出预后和诊断潜力.
结论:
- 卵巢癌的TAMs具有独特的分泌特征,与其他巨细胞亚型不同.
- 来自TAM的EV携带特定的蛋白质货物,可以作为卵巢癌的有价值生物标志物.
- 这些发现凸显了TAM衍生的EVs在改善OC诊断和预后方面的翻译潜力.
相关概念视频
Cancer Survival Analysis
764
Cancer survival analysis focuses on quantifying and interpreting the time from a key starting point, such as diagnosis or the initiation of treatment, to a specific endpoint, such as remission or death. This analysis provides critical insights into treatment effectiveness and factors that influence patient outcomes, helping to shape clinical decisions and guide prognostic evaluations. A cornerstone of oncology research, survival analysis tackles the challenges of skewed, non-normally...
764
Mitochondrial Protein Sorting
5.8K
Mitochondria are double-membrane organelles of the eukaryotes involved in cellular metabolism, signaling, ATP synthesis, and programmed cell death. Each of these processes requires specific proteins and enzymes that must be correctly sorted to the right mitochondrial subcompartment for the proper functioning of the organelle.
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
Most of these mitochondrial proteins are encoded by the nucleus and imported to the mitochondria as unfolded or loosely folded precursors. Mitochondrial precursors...
5.8K
Nuclear Protein Sorting
6.4K
Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
6.4K
Overview of Protein Sorting and Transport
22.9K
Eukaryotic cells have different membrane-bound organelles with distinct protein requirements. The process by which proteins are targeted to a specific organelle is called protein sorting.
Protein sorting can be of two types: signal-based sorting and vesicle-based trafficking. In signal-based sorting, specific amino acid sequences called sorting signals target proteins to the proper location inside the cell either via gated transport or by protein translocation. In gated transport, folded...
Protein sorting can be of two types: signal-based sorting and vesicle-based trafficking. In signal-based sorting, specific amino acid sequences called sorting signals target proteins to the proper location inside the cell either via gated transport or by protein translocation. In gated transport, folded...
22.9K
Regulation of Nuclear Protein Sorting
3.3K
Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
3.3K
The Extracellular Matrix
89.0K
Overview
89.0K


