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Related Experiment Video

Updated: May 9, 2025

Application of Biochip Microfluidic Technology to Detect Serum Allergen-specific Immunoglobulin E sIgE
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DNA-Programmed Reaction to Evaluate Specific IgE for Allergy Point-of-Care Testing.

Yan Shan Ang1, Dionne Ker Xin Low2, Lin-Yue Lanry Yung1

  • 1Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore.

Small (Weinheim an Der Bergstrasse, Germany)
|May 3, 2025
PubMed
Summary
This summary is machine-generated.

A novel DNA-programmed reaction offers rapid, sensitive detection of dust mite allergy biomarkers. This proximity-activation exponential amplification reaction (PEAR) enables point-of-care testing for specific IgE against Der p 2.

Keywords:
DNAallergyimmunoassayisothermal amplificationmolecular devices

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Area of Science:

  • Biotechnology
  • Molecular Diagnostics
  • Immunology

Background:

  • Dust mite allergy, triggered by Der p 2 antigen, affects millions globally.
  • Current diagnostic methods for specific IgE (sIgE) can be time-consuming and require laboratory settings.
  • There is a need for rapid, sensitive, and point-of-care diagnostic tools for allergies.

Purpose of the Study:

  • To develop a DNA-programmed reaction for rapid and sensitive detection of specific IgE (sIgE) against Der p 2.
  • To enable point-of-care testing for dust mite allergy using a one-pot format.
  • To create a dual readout system combining real-time fluorescence and lateral flow detection.

Main Methods:

  • A DNA program based on proximity-activation exponential amplification reaction (PEAR) was designed.
  • An AND gate logic was implemented for specific detection of IgE isotype binding to Der p 2.
  • An in situ biotinylation method was developed for amplified oligo barcode generation.
  • A dual readout modality using real-time fluorescence and lateral flow was employed.

Main Results:

  • The DNA-programmed reaction achieved computation speed (≈30 min) and sub-picomolar sensitivity.
  • The system successfully detected specific IgE against Der p 2 with high specificity.
  • Clinical samples (n=21) were evaluated, demonstrating the potential for clinical utility.
  • Dual readout provided precise quantification and a simple yes/no answer.

Conclusions:

  • The developed sIgE PEAR program is a viable tool for rapid, sensitive, and point-of-care diagnosis of dust mite allergy.
  • The one-pot format and dual readout system offer advantages for clinical application.
  • This DNA-programmed approach has broad potential for analyzing various non-nucleic acid biomarkers.