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Shingles symptoms may be caused by neuronal short circuit
Date:9/10/2013

ogy and a member of the Princeton Neuroscience Institute.

The first of these two proteins is called glycoprotein B, a fusion protein that drills the holes in the axon wall. A second protein, called Us9, acts as a shuttle that sends glycoprotein B into axons, according to the researchers. "The localization of glycoprotein B is crucial," Granstedt said. "If glycoprotein B is present but not in the axons, the synchronized flashing won't happen."

The researchers succeeded in stopping the short circuit from occurring in engineered viruses that lacked the gene for either glycoprotein B or Us9. Such genetically altered viruses are important as research tools, Enquist said.

Finding a way to block the activity of the proteins could be a useful strategy for treating the pain and itching associated with herpes viral diseases, Enquist said. "If you could block fusion pore formation, you could stop the generation of the signal that is causing pain and discomfort," he said.

Granstedt conducted the experiments with Jens-Bernhard Bosse, a postdoctoral research associate in molecular biology. Assistance with 2-photon microscopy was provided by Stephan Thiberge, director of the Bezos Center for Neural Circuit Dynamics at the Princeton Neuroscience Institute.

The team previously observed the synchronized firing in laboratory-grown neurons (PLoS Pathogens, 2009), but the new study expands on the previous work by observing the process in live mice and including the contribution of Us9, Granstedt said.

Shingles, which is caused by the virus herpes zoster and results in a painful rash, will afflict almost one out of three people in the United States over their lifetime. Genital herpes, which is caused by herpes simplex virus-2, affects about one out of six people ages 14 to 49 years in the United States, according the Centers for Disease Control and Prevention.


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Contact: Catherine Zandonella
czandone@princeton.edu
Princeton University
Source:Eurekalert

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