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Smallpox can Still be a Killer

by Trilok Kapur on  December 25, 2009 at 8:57 AM Research News   - G J E 4
 Smallpox can Still be a Killer
Scientists have explained how variola, monkeypox, and related viruses disable the immune system to yield devastating consequences, in a new study.
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Working in a high containment laboratory at the Centers for Disease Control and Prevention in Atlanta, GA, the team of researchers solved a fundamental mystery about smallpox that has puzzled scientists long after the natural disease was eradicated by vaccination.

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In the new research report appearing online in The FASEB Journal, researchers describe how the virus cripples immune systems by attacking molecules made by our bodies to block viral replication.

"These studies demonstrate the production of an interferon binding protein by variola virus and monkeypox virus, and point at this viral anti-interferon protein as a target to develop new therapeutics and protect people from smallpox and related viruses," said Antonio Alcami, Ph.D., a collaborator on the study from Madrid, Spain. "A better understanding of how variola virus, one of the most virulent viruses known to humans, evades host defenses will help up to understand the molecular mechanisms that cause disease in other viral infections."

In a high containment laboratory at the Centers for Disease Control and Prevention in Atlanta, scientists produced the recombinant proteins from the variola virus and a similar virus that affects monkeys, causing monkeypox. The researchers then showed that cells infected with variola and monkeypox produced a protein that blocks a wide range of human interferons, which are molecules produced by our immune systems meant to stop viral replication.

Source: ANI
TRI
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