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Immunofluorescence Microscopy01:12

Immunofluorescence Microscopy

A fluorescence microscope uses fluorescent chromophores called fluorochromes, which can absorb energy from a light source and then emit this energy as visible light. Fluorochromes include naturally fluorescent substances (such as chlorophylls) and fluorescent stains that are added to the specimen to create contrast. Dyes such as Texas red and FITC are examples of fluorochromes. Other examples include the nucleic acid dyes 4’,6’-diamidino-2-phenylindole (DAPI), and acridine orange.
The...
Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
Three-Dimensional Microscopy in Microbiology01:28

Three-Dimensional Microscopy in Microbiology

Three-dimensional imaging techniques are essential in cell biology, allowing researchers to visualize intricate cellular structures with high resolution. Two prominent methods, Differential Interference Contrast Microscopy (DIC) and Confocal Scanning Laser Microscopy (CSLM), provide distinct advantages for imaging live and thick specimens, respectively.Differential Interference Contrast MicroscopyDIC microscopy enhances contrast in transparent, unstained samples by converting phase...

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相关实验视频

Updated: Jul 20, 2026

Computer Numerical Control Micromilling of a Microfluidic Acrylic Device with a Staggered Restriction for Magnetic Nanoparticle-Based Immunoassays
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通过模块化微流体平台的磁性3D混合实现自动化的细胞内免疫光染色.

Zhengyi Zhang1, Mengyu Wang1, Runtao Zhong1

  • 1Institute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China.

Biosensors
|February 26, 2026
PubMed
概括

这项研究介绍了一种使用磁珠进行自动细胞内染色的微流体系统,提高了生物传感应用的效率并减少了劳动力.

关键词:
免疫光 (IF) 染色方式免疫磁性珠子 (IMBs) 的使用磁场模拟磁场的模拟微流体中的微流体.

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科学领域:

  • 生物医学工程 生物医学工程
  • 微流体学 微流体学
  • 生物感应是一种生物感应.

背景情况:

  • 传统的流式细胞计样本准备是劳动密集型和操作员依赖的.
  • 目前的方法限制了自动化和护理点生物传感.
  • 需要高效的,自动化的细胞内染色技术.

研究的目的:

  • 开发一种功能模块化微流体系统,用于自动化的细胞内免疫光染色.
  • 将免疫磁珠 (IMB) 与一种新的磁场激活相结合,以提高混合和细胞捕获.
  • 为了自动检测细胞内生物标记物,例如CD4+细胞中的辐射生物标记物.

主要方法:

  • 设计了一个微流体平台,带有动态启动的3D磁场.
  • 利用有限元模拟来优化磁场参数 (磁铁材料,大小,排列,距离).
  • 经过实验验证的CD4+细胞捕获和自动化γH2AX免疫光染色.

主要成果:

  • 在优化条件下达到86%的最大细胞捕获效率 (8毫米/秒磁转换,15分钟混合).
  • 在自动化 γH2AX 免疫光染色时,表现出强烈的线性剂量反应 (R2 > 0.9).
  • 确定了B·B作为磁性混合和细胞捕获的关键设计参数.

结论:

  • 开发的微流体系统使细胞内IF染色的强大和可扩展的自动化成为可能.
  • 磁场辅助微流体学为护理点生物传感提供了一个有前途的方法.
  • 这项技术提高了各种应用生物标志物检测的效率和可靠性.