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相关概念视频

Immunogold Electron Microscopy01:20

Immunogold Electron Microscopy

Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.

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相关实验视频

Updated: Jul 3, 2026

Rapid Fluorescence-based Characterization of Single Extracellular Vesicles in Human Blood with Nanoparticle-tracking Analysis
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通过单分子检测利用直接随机光学重建显微镜在细胞外囊中的蛋白质素化进行剖析.

Sarah R Needham1, Benjamin M Davis1, Pinar Uysal-Onganer2

  • 1Central Laser Facility, UKRI: Science & Technology Facilities Council, Rutherford Appleton Laboratory, Oxfordshire, UK.

Journal of biophotonics
|November 28, 2025
PubMed
概括
此摘要是机器生成的。

这项研究揭示了在细胞外囊泡 (EV) 的内部和表面都存在素蛋白质. 这些发现提升了在癌症诊断液体活检中使用EV素形状的潜力.

关键词:
贝叶斯模型是贝叶斯模型.素基因组 H3 的素基因组 H3 的素基因组引流化/减轻化的情况dSTORM 这是一个风暴.细胞外囊泡中的细胞外囊泡.液体活检活检液体活检单个分子检测检测.

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科学领域:

  • 生物化学 生物化学
  • 细胞生物学 细胞生物学
  • 生物标志物 生物标志物

背景情况:

  • 细胞外囊泡 (EVs) 在细胞通信中发挥关键作用,并作为病理生物标志物.
  • 蛋白质的翻译后素化与各种疾病有关,但它们在EVs中的特定局部仍然不清楚.

研究的目的:

  • 为了研究在特定的细胞外囊泡 (EV) 亚型内的素蛋白的局部化.
  • 为了确定素蛋白是否作为内货物出口,或者是否存在于EV表面.

主要方法:

  • 使用dSTORM超分辨率显微镜与EV亚型共同定位素蛋白 (pan-Cit) 和素基因素H3 (CitH3).
  • 使用三胺 (TT) 和酸胺 (PS) 标记物捕获的EV.
  • 使用贝叶斯框架分析了透和非透的EV.

主要成果:

  • 证实了pan-Cit和CitH3在电动汽车上的内部载荷和表面蛋白质的存在.
  • 检测到在透的EV中,与未透的相比,检测到的Citrullinated蛋白质含量更高.
  • 观察到的差异局部化:TT-bound EVs中的pan-Cit更高,而PS-bound EVs中的CitH3更高.

结论:

  • 这项研究扩大了对EV相关的翻译后修改的理解.
  • 这些发现突出了EV素的潜力,用于开发用于癌症检测的新型液体活检工具.