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The development of flow cytometry techniques began in 1934 with initial attempts by Andrew Moldavan, a bacteriologist who counted the cells in a flowing capillary system. Moldavan pumped cells through a capillary tube focused under a microscope for visualization. The invention of photometry allowed the measurement of differentially-stained cells, and Louis Kamentsky developed the first multiparameter flow cytometer in 1965 to identify and count the cancer cells in cervical tissue specimens.
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一个基于尺寸的单步工作流程,以集成的表面标记器检测为基础,分离细胞外囊泡.

Lien Lippens1,2,3, Niké Guilbert1,2, Sofie Van Dorpe1,2,3

  • 1Laboratory of Experimental Cancer Research, Department of Human Structure and Repair Ghent University Ghent Belgium.

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概括

一个新的单步工作流分析了细胞外囊泡 (EV) 和它们的生物标志物在小型生物流体体积中. 这种方法提高了速度,并减少了使用液体活检进行癌症诊断的可变性.

关键词:
AF4 AF4 AF4 AF4 AF4 AF4 AF4 AF4 AF4 AF4 AF4 AF4 AF4 AF4生物标志物生物标志物癌症 癌症 癌症 癌症 癌症细胞外囊泡中的细胞外囊泡.现场流量分成的部分化.液体活检活检液体活检

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科学领域:

  • 生物技术是生物技术.
  • 生物标志物发现发现
  • 纳米技术 纳米技术

背景情况:

  • 细胞外囊泡 (EVs) 是液体活检中的关键生物标志物,用于诊断疾病,特别是癌症.
  • 目前的EV分析需要从大量生物流体中进行广泛的预净化,导致延迟和变化.
  • 需要快速,灵敏和可重复的方法来表征EV生物标志物.

研究的目的:

  • 开发和验证一条简化的一步工作流程,用于同时对电动汽车的尺寸和表面标记分析.
  • 为了使复杂生物流体的微小体积的EV生物标志物检测.
  • 评估工作流程在早期癌症检测和患者分层方面的潜力.

主要方法:

  • 合非对称流域流量分成 (AF4) 与多角度光散射 (MALS) 和光灯探测器 (FLD).
  • 优化AF4-MALS-FLD系统用于分析EV表面标记物 (CD9,CD63,CD81) 和癌症生物标记物 (PSMA,EpCAM,HER2).
  • 将工作流应用于多种样本类型:纯化的EV,细胞培养超,尿液和血.

主要成果:

  • 在AF4-MALS-FLD工作流程中,成功地描述了各种生物流体中的EV大小和表面标记物.
  • 在患者尿样中检测出前列腺癌生物标志物 (PSMA).
  • 通过在血中量化特定的EV生物标志物,证明了乳腺癌患者和健康捐赠者之间的歧视.

结论:

  • 一个步骤的AF4-MALS-FLD工作流提供了一个快速而强大的方法来检测细胞外囊泡生物标志物.
  • 这种方法显著减少了样本量要求和EV分析中的技术变化.
  • 该工作流显示了在临床诊断和个性化医学中推进液体活检应用的前景.