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DNA Microarrays

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Generation of Two-color Antigen Microarrays for the Simultaneous Detection of IgG and IgM Autoantibodies

Generation of Two-color Antigen Microarrays for the Simultaneous Detection of IgG and IgM Autoantibodies

Published on: September 15, 2016

High-throughput screening for native autoantigen-autoantibody complexes using antibody microarrays.

Jung-hyun Rho¹, Paul D Lampe

¹Translational Research Program, Human Biology and Public Health Sciences, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, Washington 98109, USA.

Journal of Proteome Research

|April 2, 2013

Summary

A new high-dimensional microarray method rapidly detects autoantibody-antigen complexes in blood. This sensitive assay identifies novel immune complexes for potential disease detection and characterization.

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Area of Science:

Immunology
Biotechnology
Proteomics

Background:

Autoantibodies are crucial biomarkers for autoimmune diseases.
Detecting autoantibody-antigen complexes is challenging due to complexity and interference from free antibodies.
Existing methods often require extensive sample processing and protein purification.

Purpose of the Study:

To develop a novel, high-dimensional method for direct detection of autoantibody-autoantigen complexes.
To enable high-throughput screening of autoantibody-antigen interactions without protein production or purification.
To discover novel autoantibody-antigen complexes and circulating immune complexes in human plasma.

Main Methods:

Utilizing a high-density antibody microarray for direct incubation of serum or plasma.
Employing fluorescently labeled secondary antibodies for detection of bound complexes.
Quantification using a microarray scanner for sensitive and multiplexed analysis.

Main Results:

Demonstrated a rapid and efficient method for detecting autoantibody-autoantigen complexes.
Showed that uncomplexed antibodies do not interfere with the assay.
Identified hundreds of autoantibody-complexed cellular proteins in plasma from healthy individuals.

Conclusions:

The developed method is highly sensitive, rapid, and suitable for high-throughput screening.
This approach facilitates the discovery of new autoantibody-antigen complexes and circulating immune complexes.
These findings hold significant potential for advancing disease detection and characterization.