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Development of a sensitive, colorometric microarray assay for allergen-responsive human IgE.

Stewart J Lebrun1, Wasinee N Petchpud, Agnas Hui

  • 1Miragene, Inc., 5475 E. La Palma, Suite 206, Anaheim, CA 92807, USA. stewartlebrun@hotmail.com

Journal of Immunological Methods
|May 17, 2005
PubMed
Summary

This study developed a sensitive protein microarray assay for allergy screening. The system reliably detects allergen-specific immunoglobulin E (IgE) below 0.35 IU, offering a high-throughput solution for identifying allergy susceptibility.

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Area of Science:

  • Allergy diagnostics
  • Immunology
  • Biotechnology

Background:

  • Thousands of human allergens necessitate efficient screening methods.
  • Multiplex formats like protein microarrays offer an attractive solution for comprehensive allergy testing.

Purpose of the Study:

  • To evaluate the feasibility and sensitivity of an enzyme-based, colorimetric protein microarray assay for detecting allergen-specific IgE.
  • To establish optimal reaction parameters for the assay using control samples.

Main Methods:

  • Three common allergens (mold, dust-mite, grass) were arrayed on a protein microarray.
  • Human sera were assayed for responsive immunoglobulin E (IgE) using an enzyme-linked, colorimetric detection system.
  • Assay sensitivity was determined by constructing a standard curve with World Health Organization (WHO) standards.

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Main Results:

  • The protein microarray assay reliably detected allergen-specific IgE levels below 0.35 IU.
  • This sensitivity meets and exceeds the current WHO standard cutoff for allergy screening.
  • The system demonstrated high throughput capabilities.

Conclusions:

  • The developed enzyme-based protein microarray assay is a sensitive and feasible method for allergy screening.
  • Combining ELISA sensitivity with microarray multiplexing provides a high-throughput system for identifying allergen susceptibility.
  • This approach offers optimal sensitivity for clinical allergy diagnostics.