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Findings to help in design of drugs against virus causing childhood illnesses
Date:3/21/2013

WEST LAFAYETTE, Ind. - New research findings may help scientists design drugs to treat a virus infection that causes potentially fatal brain swelling and paralysis in children.

The virus, called enterovirus 71, causes hand, foot and mouth disease and is common throughout the world. Although that disease usually is not fatal, the virus has been reported to cause fatal encephalitis in infants and young children, primarily in the Asia-Pacific region.

Currently, no cure exists for the infection.

New findings show the precise structure of the virus bound to a molecule that inhibits infection. The findings are detailed in a paper appearing this week in Proceedings of the National Academy of Sciences.

"These results provide a structural basis for development of drugs to fight enterovirus 71 infection," said Michael G. Rossmann, Purdue University's Hanley Distinguished Professor of Biological Sciences.

Rossmann is co-author of a paper with Purdue postdoctoral research associate Pavel Plevka; research scientist Rushika Perera; postdoctoral research associate Moh Lan Yap; Jane Cardosa, a researcher at Sentinext Therapeutics in Malaysia; and Richard J. Kuhn, a professor and head of Purdue's Department of Biological Sciences.

The researchers had previously used a technique called X-ray crystallography to determine the virus's precise structure. A small molecule called a "pocket factor" is located within a pocket of the virus's protective shell, called the capsid. When the virus binds to a human cell, the pocket factor is squeezed out of its pocket resulting in the destabilization of the virus particle, which then disintegrates and releases its genetic material to infect the cell and replicate.

Researchers led by Rossmann have developed antiviral drugs for other enteroviruses such as rhinoviruses that cause the common cold. The drugs work by replacing the pocket factor with a molecule that binds more tightly than the real pocket factor, i
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Contact: Emil Venere
venere@purdue.edu
765-494-4709
Purdue University
Source:Eurekalert

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