Susceptibility to flavivirus-specific antiviral response of Oas1b affects the neurovirulence of the Far-Eastern subtype of tick-borne encephalitis virus

Susceptibility to flavivirus-specific antiviral response of Oas1b affects the neurovirulence of... Tick-borne encephalitis virus (TBEV) is a zoonotic agent that causes fatal encephalitis in humans. 2’-5’-oligoadenylate synthetase 1b ( Oas1b ) has been identified as a flavivirus resistance gene, but most inbred laboratory mice do not possess a functional Oas1b gene. In this study, a congenic strain carrying a functional Oas1b gene, B6.MSM- Oas , was used to evaluate the pathogenicity of Far-Eastern TBEV. Although intracerebral infection of B6.MSM- Oas mice by Oshima 5-10 resulted in limited signs of illness, infection by Sofjin-HO resulted in death with severe neurologic signs. While Oshima 5-10 was cleared from the brain, Sofjin-HO was not cleared despite a similar level of expression of the intact Oas1b gene. Necrotic neurons with viral antigens and inflammatory reactions were observed in the brain infected with Sofjin-HO. These data indicate that the different susceptibility to the antiviral activity of Oas1b resulted in a difference in neurovirulence in the two TBEV strains. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Susceptibility to flavivirus-specific antiviral response of Oas1b affects the neurovirulence of the Far-Eastern subtype of tick-borne encephalitis virus

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Publisher
Springer Vienna
Copyright
Copyright © 2013 by Springer-Verlag Wien
Subject
Biomedicine; Virology; Medical Microbiology; Infectious Diseases
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s00705-012-1579-1
Publisher site
See Article on Publisher Site

References

  • Tick-borne encephalitis virus: reference strain Sofjin and problem of its authenticity
    Kovalev, SY; Mukhacheva, TA; Kokorev, VS; Belyaeva, IV
  • Virus spread, tissue inflammation and antiviral response in brains of flavivirus susceptible and resistant mice acutely infected with Murray Valley encephalitis virus
    Silvia, OJ; Pantelic, L; Mackenzie, JS; Shellam, GR; Papadimitriou, J; Urosevic, N
  • Construction of a replicon and an infectious cDNA clone of the Sofjin strain of the Far-Eastern subtype of tick-borne encephalitis virus
    Takano, A; Yoshii, K; Omori-Urabe, Y; Yokozawa, K; Kariwa, H; Takashima, I

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