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A Microfluidic Chip for the Versatile Chemical Analysis of Single Cells
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Microfluidic Sample Preparation for Multiplexed Single-Cell Proteomics Using a Nested Nanowell Chip.

Junho Park1,2, Tommy K Cheung3, Ying Zhu4

  • 1Department of Pharmacology, School of Medicine, CHA University, Seongnam-si, Gyeonggi-do, South Korea. jpark@cha.ac.kr.

Methods in Molecular Biology (Clifton, N.J.)
|July 25, 2024
PubMed
Summary
This summary is machine-generated.

This study presents a microfluidic droplet-based protocol for single-cell proteomics, enabling efficient sample preparation and sensitive LC-MS detection for ultralow protein amounts.

Keywords:
DropletMass spectrometryMicrofluidicMultiplexed labelingNanoPOTSSample preparationSingle-cell proteomics

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Area of Science:

  • Proteomics
  • Biotechnology
  • Analytical Chemistry

Background:

  • Single-cell proteomics is advancing rapidly but faces challenges in sample preparation and detection sensitivity due to ultralow protein quantities.
  • Efficiently processing and analyzing proteins from individual cells is crucial for understanding cellular heterogeneity and function.

Purpose of the Study:

  • To develop and detail a robust protocol for single-cell proteomics using microfluidic droplet technology.
  • To enable sensitive and high-throughput analysis of proteins from single cells via mass spectrometry.

Main Methods:

  • A microfluidic droplet-based sample processing technology was employed for single-cell proteomics.
  • Isobaric labeling was utilized in conjunction with a commercially available platform (cellenONE) for high-throughput sample handling.
  • An optimized liquid chromatography-mass spectrometry (LC-MS) method was developed for sensitive data acquisition.

Main Results:

  • The protocol demonstrated high sample recovery and throughput for processing single cells and carrier samples.
  • The microfluidic approach facilitated efficient sample preparation for ultralow protein amounts.
  • An optimized LC-MS method ensured sensitive and robust protein detection.

Conclusions:

  • The developed microfluidic droplet-based protocol significantly advances single-cell proteomics capabilities.
  • This method overcomes key challenges in sample preparation and LC-MS detection for single-cell analysis.
  • The protocol offers a sensitive, high-throughput solution for mass spectrometry-based single-cell proteomics research.