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Rapid approach to identify influenza A virus mutations and drug resistance developed
Date:5/28/2009

Genome Institute of Singapore scientists, led by Christopher Wong, Ph.D., have developed a novel approach to uncover the complete sequence of any influenza A virus, including H1NI, with just a quick nasal swab or nasal pharyngeal wash from patients.

The new method, which enables scientists to amplify full genomes of influenza A viruses and sequence them within a day, was developed at the Genome Institute of Singapore (GIS), one of the research institutes sponsored by Singapore's A*STAR (Agency for Science, Development and Research), in collaboration with Roche NimbleGen.

The system, which combines a novel generic polymerase chain reaction (PCR) with NimbleGen's unique microarray-based platform, makes use of the same RNA (ribonucleic acid) material that is left over from traditional PCR-based diagnostics and is able to recognize any novel strain of influenza A in the first pass.

This enables a faster development of diagnostics for any possible new variant; it can also rapidly determine whether the strain has developed drug resistance. (Details of NimbleGen's microarray-based platform are provided below.)

"This new approach takes advantage of our novel PCR technology, developed for detecting a wide range of pathogens," said Dr. Wong, GIS Chief Scientific Officer for Biomarker Development. "This should greatly simplify the process of sequencing novel viruses."

The scientists' approach is also able to trace the mutations in the influenza A virus that may cause its resistance to drugs.

"The significance of this tracking process can be better appreciated in that it provides for vital information that can be used to prevent or combat a pandemic," said Edison Liu, M.D., GIS Executive Director.

This is especially important given the rapid spread of the new strain of the influenza A (nH1N1) virus. Experts have been concerned that the evolutionary track of this new strain might lead to mutation or re-ass
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Contact: Cathy Yarbrough
sciencematter@yahoo.com
858-243-1814
Agency for Science, Technology and Research (A*STAR), Singapore
Source:Eurekalert

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