芯片密度计 (DoC):通过微通道流中的沉积来测量单细胞质量密度
David Dannhauser1, Maria Isabella Maremonti1, Paolo Antonio Netti1,2
1Interdisciplinary Research Centre on Biomaterials (CRIB) and, Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, University of Naples "Federico II", 80125 Naples, Italy. david.dannhauser@unina.it.
Lab on a chip
|January 31, 2025
概括
一个新的微流体芯片,芯片上的密度计 (DoC),使用水力动态沉积方法准确测量单细胞质量密度. 这种无标签的方法提供了一种多功能方法,可以在没有修改的情况下表征多种细胞类型.
科学领域:
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
- 微流体学 微流体学
背景情况:
- 无标签的细胞识别依赖于内在的生物物理和形态特征.
- 细胞密度是单细胞分析的一个关键参数,但很难测量.
- 现有的细胞密度测量方法通常是复杂的或缺乏多功能性.
研究的目的:
- 开发一种简单多功能的微流体芯片,用于无标签的单细胞质量密度测量.
- 建立一种适用于各种细胞类型和形状的精确细胞密度测定方法.
- 为了根据已知的细胞密度验证芯片的准确性.
主要方法:
- 一个微流体芯片 (密度计在芯片上的芯片,DoC) 是利用水力动力沉积设计的.
- 细胞经历精确的3D对齐,然后进行横截面变化以诱导校准的沉积.
- 基于力量平衡和细胞轨迹跟踪的数学模型计算了单细胞密度.
- 该系统可容纳从0.75-22.5微米的物体直径.
主要成果:
- 该DoC系统实现了998kgm−3的最小可测密度,灵敏度为0.001.
- 红细胞,淋巴细胞和中性粒细胞的计算和文献值之间观察到很高的一致性 (~1%的误差).
- 该方法无标签,可复制,并且不需要对不同细胞类型的芯片进行修改.
结论:
- 芯片上的密度计 (DoC) 提供了一个易于使用和可重复的解决方案,用于无标签的单细胞密度测量.
- 这项技术提供了一种普遍的方法来表征广泛的细胞类型,无论大小和形状如何.
- 使用DoC精确的细胞密度测定可以推进单细胞分析和细胞类型识别.
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