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Lab-in-a-Tip: a multiplex immunoassay platform based on a self-assembled barcoded protein array.

Yiran He1,2, Min Jiang2, Zhenlong Liang3

  • 1School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei, China.

Nature Communications
|April 28, 2025
PubMed
Summary
This summary is machine-generated.

A novel "Lab-in-a-Tip" (LIT) immunoassay offers significantly higher sensitivity and speed than current methods. This microfluidic device enables rapid diagnostics using minimal sample volumes, advancing high-throughput scientific and clinical applications.

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Area of Science:

  • Biotechnology
  • Analytical Chemistry
  • Microfluidics

Background:

  • High-throughput immunoassays are vital for scientific research and clinical diagnostics.
  • Existing multiplex immunoassay platforms, like Luminex, face limitations in sensitivity, speed, and sample volume requirements.

Purpose of the Study:

  • To introduce and evaluate the
  • Lab-in-a-Tip
  • (LIT) concept for high-throughput immunoassay.
  • To demonstrate LIT's advantages over current gold-standard methods in multiplex immunoassays.

Main Methods:

  • Fabrication of a pipette tip containing a high-density protein array and reagents.
  • Utilizing self-assembling digitally encoded microparticles for array creation.
  • Integration with a robotic workstation for automated liquid handling.

Main Results:

  • LIT achieves analytical sensitivity down to femtograms per milliliter (fg/ml), improving by two orders of magnitude over Luminex.
  • Incubation time is reduced to 15 minutes, a significant decrease from Luminex's 210 minutes.
  • LIT requires only 10 µl of sample, one-fifth of Luminex's requirement.

Conclusions:

  • The "Lab-in-a-Tip" (LIT) concept offers superior analytical sensitivity, speed, and throughput for multiplex immunoassays.
  • LIT's reduced sample volume and enhanced performance make it ideal for rapid diagnostics and research involving limited biological samples.
  • This technology has the potential to significantly expand the scope of high-throughput immunoassay applications.