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Researchers find chink in the armor of viral 'tummy bug'
Date:12/23/2008

Researchers at Griffith University's Institute for Glycomics in collaboration with colleagues at the University of Melbourne have moved a step closer to identifying a broad spectrum treatment for the dreaded 'viral tummy bug' or rotavirus.

These highly-infectious viruses are the leading cause of severe diarrhoea in young children, responsible for thousands of hospitalisations in the developed world, and hundreds of thousands of deaths each year in developing countries.

Institute Executive Director Professor Mark von Itzstein said research findings published in the world-leading Chemical Biology journal Nature Chemical Biology this week demanded a total rethink of how these viruses work.

"Rotaviruses are thought to infect the bodies by sticking to certain types of sugars called sialic acids on the surface of our stomach cells. They then enter cells and reproduce rapidly, causing illness," he said.

"Rotavirus vaccines are still in their infancy, as problems emerged with the first vaccine that was trialled a number of years ago. While other vaccines are now in clinical use, new directions are required in the development of potential drugs to prevent or treat this deadly virus."

He said that to better understand how carbohydrates are involved in rotavirus infection, researchers had focussed on treating mammalian cells with a protein called sialidase which cuts these surface sugars so the virus cannot attach.

Previous to his group's work most scientists believed only some of the many strains of rotavirus infection could be prevented with sialidase treatment while others were apparently immune to its effects.

This led to the conclusion that some viruses depend on sialic acid to infect the body while others were thought to cause infection independent of sialic acid.

"Unsuccessful attempts to reduce rotavirus infection with this treatment led scientists to group rotaviruses into two class
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Contact: Jeannette Langan
j.langan@griffith.edu.au
61-755-528-654
Research Australia
Source:Eurekalert

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