商用细胞外囊泡作为参考材料的方法间表征
Sumeet Poudel1, Diane L Nelson1, James H Yen1
1National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
Biomolecules
|January 28, 2026
概括
标准化细胞外囊泡 (EV) 表征是至关重要的. NIST评估了EV大小和度的多种分析方法,揭示了显著的变化,并强调了需要可重复的技术和参考材料的需要.
科学领域:
- 生物技术是生物技术.
- 纳米技术纳米技术
- 分析化学 分析化学
背景情况:
- 细胞外囊泡 (EVs) 是关键的生物标志物,但它们的表征缺乏标准化.
- 美国国家标准与技术研究所 (NIST) 正在为电动汽车开发参考材料 (RMs).
- 需要正角分析方法来准确测量EV的属性,例如大小和度.
研究的目的:
- 用直角技术评估和比较来自不同细胞源的EV的粒子大小分布 (PSD) 和粒子数度 (PNC).
- 为了评估EVs的蛋白质和微RNA (miRNA) 含量.
- 识别跨测量平台的变化,并支持标准化EV RMs的开发.
主要方法:
- 采用了包括冷电子显微镜 (Cryo-EM),粒子跟踪分析 (PTA),非对称流域流量分化 (AF) 和微流体电阻脉冲传感 (MRPS) 在内的正角技术.
- 使用质谱法 (MS) 进行了蛋白质基因分析.
- 使用小RNA测序 (RNA-seq) 分析了微RNA (miRNA) 含量.
主要成果:
- 与 Cryo-EM 相比,所有测试方法都显示了PSD和PNC的差异,MRPS最接近,AF最差异化.
- 在不同方法和细胞源中,PNC的定量差异达到了两个数量级.
- 质谱测量确定了关键的EV蛋白质,而RNA-seq显示了实验室间显著的差异.
结论:
- 在不同分析平台的EV表征中存在显著的变化.
- 这些发现强调了对可重复的方法和对电动汽车的标准化参考材料的急需.
- 为了在研究和临床应用中推进可靠的EV测量,NIST的持续努力至关重要.
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