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Influenza study: Meet virus' new enemy
Date:2/21/2013

Simon Fraser University virologist Masahiro Niikura and his doctoral student Nicole Bance are among an international group of scientists that has discovered a new class of molecular compounds capable of killing the influenza virus.

Working on the premise that too much of a good thing can be a killer, the scientists have advanced previous researchers' methods of manipulating an enzyme that is key to how influenza replicates and spreads.

Their new compounds will lead to a new generation of anti-influenza drugs that the virus' strains can't adapt to, and resist, as easily as they do Tamiful. It's an anti-influenza drug that is becoming less effective against the constantly mutating flu virus.

These increasingly less adequate anti-influenza drugs are currently doctors' best weapons against influenza. They helped the world beat H1N1, swine flu, into submission four years ago.

The journal Science Express has just published online the scientists' study, revealing how to use their newly discovered compounds to interrupt the enzyme neuraminidase's facilitation of influenza's spread.

Tamiful and another anti-influenza drug, Relenza, focus on interrupting neuraminidase's ability to help influenza detach from an infected cell's surface by digesting sialic acid, a sugar on the surface of the cell. The flu virus uses the same sugar to stick to the cell while invading it. Once attached, influenza can invade the cell and replicate. v

This is where the newly discovered compounds come to the still-healthy cells' rescue. They clog up neuraminidase, stopping the enzyme from dissolving the sialic acid, which prevents the virus from escaping the infected cell and spreading.

The new compounds are also more effective because they're water-soluble. "They reach the patient's throat where the flu virus is replicating after being taken orally," says Niikura, a Faculty of Health Sciences associate professor.

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Contact: Carol Thorbes
cthorbes@sfu.ca
Simon Fraser University
Source:Eurekalert

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