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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
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.
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.
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.