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Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray
Published on: April 25, 2014
Comparison of whole genome amplification methods for detecting pathogenic bacterial genomic DNA using microarray.
Akihiko Uda1, Kiyoshi Tanabayashi, Osamu Fujita
1Department of Veterinary Science, National Institute of Infectious Diseases, Tokyo 162-8640, Japan. auda@nih.go.jp
Japanese Journal of Infectious Diseases
|November 23, 2007
Summary
Multiple displacement amplification (MDA) and OmniPlex whole genome amplification (WGA) methods efficiently amplify limited DNA samples for microbial detection using microarrays, showing minimal bias and high signal quality.
Area of Science:
- Molecular Biology
- Genomics
- Microbiology
Background:
- Microarray-based genetic diagnosis of pathogens requires substantial DNA.
- Whole genome amplification (WGA) methods are crucial for increasing limited DNA amounts for molecular diagnostics.
Purpose of the Study:
- To compare the efficiency of four WGA methods for preparing DNA for microarray analysis.
- To identify the most suitable WGA method for microbial detection using microarrays.
Main Methods:
- Four WGA methods were evaluated using *Francisella tularensis* and *Escherichia coli* genomic DNA.
- Amplification efficiency, gene amplification bias, and performance on microarray slides were assessed.
- Multiple displacement amplification (MDA) and OmniPlex WGA were specifically analyzed, including Phi29 v2.
Main Results:
- All four WGA methods yielded over 1.5 microg of product from 10 ng of genomic DNA.
- MDA and OmniPlex WGA exhibited the least bias in bacterial gene amplification.
- DNA amplified by Phi29 v2 (MDA) and OmniPlex WGA demonstrated high signal intensity and signal-to-noise ratios on microarray slides.
Conclusions:
- Phi29 v2 and OmniPlex WGA are effective methods for amplifying limited DNA samples for microbial detection via microarrays.
- These WGA techniques provide sufficient DNA with minimal bias, ensuring reliable microarray analysis for pathogen identification.
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