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Journal of Virology, September 1998, p. 7420-7427, Vol. 72, No. 9
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Measles Virus Spread and Pathogenesis in Genetically Modified Mice

Branka Mrkic,1 Jovan Pavlovic,2 Thomas Rülicke,3 Pietro Volpe,1 Christian J. Buchholz,1 Dennis Hourcade,4 John P. Atkinson,4 Adriano Aguzzi,5 and Roberto Cattaneo1,*

Institut für Molekularbiologie Abt. I,1 Institut für Medizinische Virologie,2 Biologisches Zentrallabor,3 and Institut für Neuropathologie,5 Universität Zürich, Zürich, Switzerland, and Division of Rheumatology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri 631104

Received 2 March 1998/Accepted 8 June 1998

Attenuated Edmonston measles virus (MV-Edm) is not pathogenic in standard mice. We show here that MV-Edm inoculated via the natural respiratory route has a limited propagation in the lungs of mice with a targeted mutation inactivating the alpha/beta interferon receptor. A high dose of MV-Edm administered intracerebrally is lethal for about half of these mice. To study the consequences of the availability of a high-affinity receptor for MV propagation, we generated alpha/beta interferon-defective mice expressing human CD46 with human-like tissue specificity. Intranasal infection of these mice with MV-Edm resulted in enhanced spread to the lungs and more prominent inflammatory response. Virus replication was also detected in peripheral blood mononuclear cells, the spleen, and the liver. Moreover, intracerebral inoculation of adult animals with low MV-Edm doses caused encephalitis with almost inevitably lethal outcome. We conclude that in mice alpha/beta interferon controls MV infection and that a high-affinity receptor facilitates, but is not strictly required for, MV spread and pathogenesis.

* Corresponding author. Mailing address: Institut für Molekularbiologie Abt. I, Universität Zürich, Winterthurerstr. 190, 55-L-34a, 8057 Zürich, Switzerland. Phone: 41-1-633 31 17. Fax: 41-1-635 68 64. E-mail: cattaneo{at}molbio1.unizh.ch.

Journal of Virology, September 1998, p. 7420-7427, Vol. 72, No. 9
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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