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Related Experiment Video

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Single cell capture, isolation, and long-term in-situ imaging using quantitative self-interference spectroscopy.

Rongxin Fu1, Ya Su1, Ruliang Wang1

  • 1Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China.

Cytometry. Part a : the Journal of the International Society for Analytical Cytology
|March 11, 2021
PubMed
Summary

This study presents a novel microfluidic chip and imaging system for label-free, quantitative monitoring of single cells. The technology enables long-term cell culture and analysis, advancing biomedical research.

Keywords:
cell capture and isolationinterferometric microscopylabel-free in-situ cell monitoringlong-term imagingmicrofluidic chip

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Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Microfluidics

Background:

  • Single cell research is crucial in medicine.
  • Current methods lack label-free quantitative imaging for long-term cell monitoring.
  • Advanced techniques are needed for microfluidic cell manipulation and analysis.

Purpose of the Study:

  • To develop a system for label-free, quantitative imaging of single cells.
  • To enable simultaneous microfluidic manipulation and long-term monitoring of individual cells.
  • To investigate the capabilities of a microfluidic chip combined with quantitative self-interference spectroscopy.

Main Methods:

  • Utilized a microfluidic chip for single cell capture and isolation.
  • Employed a compact cell incubator for sustained cell culture within the chip.
  • Applied quantitative self-interference spectroscopy for label-free imaging.
  • Developed a system for trapping, transferring, and culturing single cells.

Main Results:

  • Achieved successful capture, isolation, and transfer of single cells using the microfluidic chip.
  • Demonstrated long-term in-situ monitoring of single cells cultured for 120 hours.
  • Obtained quantitative and dynamic refractive index distribution in living cells.
  • The imaging method showed high refractive index sensitivity (0.0282) with low relative error (0.04%).

Conclusions:

  • The integrated system enables label-free, quantitative analysis of single cells.
  • The microfluidic chip and incubator support long-term cell culture and manipulation.
  • This technology advances single cell research in biomedical studies and clinical medicine.