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New technique tracks viral infections, aids development of antiviral drugs
Date:4/11/2011

, while highly sensitive, involve the lysis [the breaking down] of cells prior to measurement and are therefore unable to provide information about cellular viability, infected cell phenotypes, percentage of infected cells or the variation in infection among a cell population. The LNA probe differs from traditional nucleotide probes by binding more tightly to its target RNA.

LNA-flow FISH presents a fast and easy way to screen for compounds with antiviral activity and could be adapted for monitoring infections in the blood for vaccine therapy and development. This method adds a necessary tool for several emerging areas in cell biology that enables the use of high throughput measurements for entire populations and improves statistical analyses.

"This method can be expanded by adding more than one kind of LNA probe to enable multiple detection of different viral and host RNA," adds Robertson. "The multiplexing enhancement can be used to better understand infectious agents, allowing this technique to be used to aid in the development of antiviral drugs for a variety of viruses."

LNA flow-FISH offers an advantage over other techniques due to its simplicity and superiority. Methods involving genetic recombination of the virus to express a fluorescent protein as a means to mark the presence of virus can utilize flow cytometry for large-batch analysis of infected cells. However, an exception to this approach is viral strains that have not acquired genetic mutations, known as wild-type viruses (such as strains of Human Immunodeficiency Virus-HIV), which would require a large initial investment of labor for engineering each virus of interest.


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Contact: Daniel Parry
daniel.parry@nrl.navy.mil
202-767-2541
Naval Research Laboratory
Source:Eurekalert  

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