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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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Real Time RT-PCR

Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
The real-time quantification of the number of amplified products is...

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Related Experiment Video

Updated: Jun 24, 2026

DNA Microarrays: Sample Quality Control, Array Hybridization and Scanning

DNA Microarrays: Sample Quality Control, Array Hybridization and Scanning

Published on: March 15, 2011

Real-time DNA microarrays: reality check.

Alexander Chagovetz¹, Steve Blair

¹Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112, USA. alexa488@comcast.net

Biochemical Society Transactions

|March 18, 2009

Summary

This summary is machine-generated.

Current DNA microarrays have inherent quantification issues. A new real-time approach with advanced detection methods can improve accuracy for multiplex reactions.

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Area of Science:

Molecular Biology
Biotechnology
Analytical Chemistry

Background:

DNA microarrays often suffer from inconsistent quantification and high rates of false positives.
These issues stem from inherent limitations in current surface reaction mechanisms and non-equilibrium multiplex reactions.

Purpose of the Study:

To analyze the inherent problems in current DNA microarray technology.
To evaluate the potential of a paradigm shift towards real-time data acquisition, analogous to real-time PCR.
To explore novel detection chemistries and analysis methods for improving microarray performance.

Main Methods:

Theoretical analysis of surface reaction mechanisms in DNA microarrays.
Comparison of existing microarray paradigms with real-time data acquisition strategies.
Investigation of new detection chemistries and data analysis approaches for multiplex reactions.

Main Results:

The inherent limitations of current DNA microarray technology lead to quantification inconsistencies and false positives.
A real-time data acquisition approach, while beneficial, does not inherently solve the problem of multiplex non-equilibrium reactions.
New detection chemistries and analysis methods are crucial for extracting specific quantitative information from real-time microarray data.

Conclusions:

Fundamental issues in multiplex reactions within DNA microarrays require novel solutions beyond simple real-time acquisition.
Implementing advanced detection chemistries and analysis techniques can enable accurate, target-specific quantification using real-time microarrays.
Real-time microarrays hold potential for broader applications if these technological advancements are adopted.