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Related Experiment Video

Updated: Aug 14, 2025

Multiplexed Isothermal Amplification Based Diagnostic Platform to Detect Zika, Chikungunya, and Dengue 1
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Droplet Encoding-Pairing Enabled Multiplexed Digital Loop-Mediated Isothermal Amplification for Simultaneous

Dongyang Cai1, Yu Wang1, Jingjing Zou2

  • 1Department of Laboratory Medicine, the Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou, 510180, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 16, 2023
PubMed
Summary

A new droplet digital nucleic acid analysis (DNAA) strategy enhances multiplexing capacity using tricolor droplet indexing. This method enables flexible, high-order multiplexing for accurate pathogen detection in clinical samples.

Keywords:
droplet encoding-pairingdroplet microfluidicsmachine learning algorithmmultiplexed droplet digital nucleic acid analysisquantitative detection of pathogens

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Area of Science:

  • Biotechnology
  • Molecular Diagnostics
  • Microfluidics

Background:

  • Digital nucleic acid analysis (DNAA) offers high sensitivity and precision but is limited in multiplexing.
  • Existing methods struggle to simultaneously detect numerous targets efficiently.

Purpose of the Study:

  • To develop a flexible and scalable multiplexing strategy for DNAA.
  • To overcome the limitations of current DNAA multiplexing capacity.

Main Methods:

  • A droplet encoding-pairing strategy using tricolor combinations to index primer droplets.
  • Sequential introduction of template and primer droplets into a microfluidic chip with microwell array.
  • Pairwise droplet trapping, merging, and pre-merging/post-amplification image analysis with machine learning.

Main Results:

  • Achieved simultaneous quantitative detection of multiple targets by combining amplification signals with droplet encoding.
  • Demonstrated flexible multiplexed DNAA by establishing 8-plex droplet digital loop-mediated isothermal amplification (mddLAMP) assays.
  • Clinical sample analysis confirmed mddLAMP assay results consistent with conventional methods.

Conclusions:

  • The developed DNAA multiplexing strategy enables flexible, on-demand high-order multiplexing.
  • This approach is a valuable tool for high-content pathogen detection.
  • The strategy significantly improves multiplexing capacity for advanced molecular diagnostics.