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Study lays groundwork for norovirus anti-viral treatments
Date:7/22/2013

ANN ARBOR, Mich. An animal model of the human norovirus created at the University of Michigan Health System lays the groundwork for understanding the biology of the pesky virus and developing antiviral drug treatment.

Well-known as the virus that impacts cruise ship vacations, norovirus leads to misery on land too. The virus spreads quickly from person to person in any closed-in space, such as schools, nursing homes, or day-care centers.

"The first virus in this group was discovered in 1972 following a disease outbreak at a school in Norwalk, Ohio in 1968. Since then research has been underway to culture noroviruses in the laboratory and develop animal models," says lead researcher Christiane Wobus, Ph.D., assistant professor in the Department of Microbiology and Immunology at the University of Michigan Medical School.

An international group of scientists from the U.S. and Germany authored the study published in mBIO, a journal of the American Society of Microbiology.

"Norovirus research has been hampered by the absence of a norovirus cell culture and a genetically manipulable small animal model," Wobus says. "This new model gives us the tool to test potential antiviral compounds and may lay the foundation to culture these viruses in the lab."

The new model was developed by determining whether human noroviruses can infect "humanized" mice, this is mice containing human immune cells. These mice are widely used for study of the human immunodeficiency virus (HIV), a virus which can only infect human cells.

As a control researchers also included the same mice without human immune cells. In the study, both groups of mice were infected by human norovirus.

Additional studies determined that the immunodeficient background of this particular mouse strain is important in permitting human norovirus infection and identified macrophages, a vital immune cell in the body, as the cell type infected by the
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Contact: Shantell M. Kirkendoll
smkirk@umich.edu
734-764-2220
University of Michigan Health System
Source:Eurekalert

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