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Single-Cell Proteomics by Barcoded Phage-Displayed Screening via an Integrated Microfluidic Chip.

Yujiao Wang1, Jing Zhao1,2, Zhenwei Jiang1

  • 1State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, China.

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This study introduces a microfluidic chip using magnetic nanoparticles to efficiently capture rare circulating tumor cells (CTCs). The platform enables single-cell analysis of surface protein expression, advancing rare cell research.

Keywords:
Barcoded phage-displayed antibody screeningCirculating tumor cellsMicrofluidicsPhage-based profilingProtein expressionSingle cell

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Area of Science:

  • Biotechnology
  • Proteomics
  • Microfluidics

Background:

  • Single-cell proteome profiling is crucial for understanding cellular heterogeneity.
  • Analyzing rare cells, such as circulating tumor cells (CTCs), presents significant technical challenges.
  • Existing methods often lack the sensitivity and throughput required for rare cell analysis.

Purpose of the Study:

  • To develop a quantitative and versatile platform for single-cell analysis of rare cells.
  • To enable efficient capture and in situ analysis of circulating tumor cells (CTCs).
  • To monitor changes in cell-surface protein expression in rare cells with high resolution.

Main Methods:

  • Development of an integrated microfluidic chip utilizing magnetic nanoparticles for cell capture.
  • On-chip incubation and in situ analysis of cell-surface protein expression.
  • Integration of phage-based barcoding with next-generation sequencing for marker expression analysis.

Main Results:

  • Exceptional efficiency in capturing single tumor cells using magnetic nanoparticles.
  • Successful monitoring of multiple surface marker expression changes induced by CTC adherence.
  • Demonstration of single-cell resolution for analyzing rare cell populations.

Conclusions:

  • The developed microfluidic platform offers a powerful tool for comprehensive screening of multiple surface antigens in rare cells.
  • This technology provides valuable insights into biological heterogeneity and human disease mechanisms.
  • The platform facilitates advancements in the study of circulating tumor cells and other rare cell types.