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J. Virol., Feb 1995, 741-747, Vol 69, No. 2
Copyright © 1995, American Society for Microbiology

Neutralizing antibodies in Borna disease virus-infected rats

CG Hatalski, S Kliche, L Stitz and WI Lipkin
Department of Neurology, University of California, Irvine 92717.

Borna disease is a neurologic syndrome caused by infection with a nonsegmented, negative-strand RNA virus, Borna disease virus. Infected animals have antibodies to two soluble viral proteins, p40 and p23, and a membrane-associated viral glycoprotein, gp18. We examined the time course for the development of neutralization activity and the expression of antibodies to individual viral proteins in sera of infected rats. The appearance of neutralizing activity correlated with the development of immunoreactivity to gp18, but not p40 or p23. Monospecific and monoclonal antibodies to native gp18 and recombinant nonglycosylated gp18 were also found to have neutralizing activity and to immunoprecipitate viral particles or subparticles. These findings suggest that gp18 is likely to be present on the surface of the viral particles and is likely to contain epitopes important for virus neutralization.

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