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Precise and convenient size barcode on microfluidic chip for multiplex biomarker detection.

Man Tang1,2,3, Jinyao Chen1, Jia Lei1

  • 1School of Electronic and Electrical Engineering, Wuhan Textile University, Wuhan 430200, People's Republic of China. slhong@whu.edu.cn.

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Summary

This study introduces a novel microfluidic chip for multiplex biomarker detection, offering a simple and precise coding method. This innovation reduces costs and complexity for point-of-care tests (POCT).

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Microfluidics

Background:

  • Multiplex biomarker detection is crucial for diagnostics but hindered by costly materials and equipment.
  • Existing methods often require complex coding and specialized hardware, limiting accessibility.

Purpose of the Study:

  • To develop a convenient and precise coding method for multiplex biomarker detection.
  • To demonstrate the utility of a wedge-shaped microfluidic chip for microparticle coding and separation.

Main Methods:

  • Utilized a microfluidic chip with a microchannel of continuously varying height.
  • Employed size-based separation and coding of microparticles within the microchannel.
  • Applied microparticles coated with specific antibodies for target biomarker identification.

Main Results:

  • Successfully coded over 5-7 distinct microparticle types, even with size differences under 1 μm.
  • Demonstrated the capability for multiplex biomarker detection using size-coded microparticles.
  • Validated a simple, clog-free, and operationally straightforward coding and detection process.

Conclusions:

  • The proposed wedge-shaped microfluidic chip provides an efficient and cost-effective solution for multiplex biomarker detection.
  • This method significantly lowers the barriers associated with current detection technologies.
  • The approach shows substantial promise for advancing point-of-care testing (POCT) applications.