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1992 Fiscal Year Final Research Report Summary

Study on Neurovirulence and Safety of Recombinant Vaccinia Virus in Monkeys

Research Project

Project/Area Number 03670240
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Virology
Research InstitutionNational Institute of Health

Principal Investigator

KOJIMA Asato  Dept. Pathol., NIH Chief, 感染病理部, 室長 (30100077)

Co-Investigator(Kenkyū-buntansha) SATA Tetsutaro  AIDS Res. Center, NIH Chief, エイズ研究センター, 室長 (00162397)
KURATA Takeshi  Dept. Pathol., NIH Director, 感染病理部, 部長 (50012779)
Project Period (FY) 1991 – 1992
KeywordsRecombinant Vaccinia Virus / Neurovirulence / Pathogenesis / Virus Insection / Safety / Monkey
Research Abstract

In order to evaluate the safety of recombinant vaccinia virus(RVV) as a potent live vaccine, RVVs expressing hepatitis B virus surface antigen, Japanese encephalitis virus E protein or HIV-1 gag/pol proteins were tested for the virulence in mice, guinea pigs and rabbits, and for laboratory attenuation markers in in vitro cultures. RVVs were constructed from the virulent WR strain, the Lister(Elstree) vaccine strain(LO) and the low neurovirulent LC16mO strain (mO) of vaccinia virus. Experimental animals and primary cultures of rabbit kidney cells inoculated with RVVs derived from WR, LO and mO showed the decreasing neurovirulence and skin lesions, and the increasing in vitro attenuation markers, respectively, in this order. RVVs reserved almost the same or low degree of virulence as parental wild-type trains. Virus antigens of the least virulent RVV-mO was localized only at the injection sites of the skin in intradermally inoculated animals. Even when inoculated intravenously or intraperitoneally, RVV-mO was not detected in the brain.
Based on results of the virulence tests in experimental animals, safety tests of RVV-mO were done using cynomolgus monkeys. The monkeys inoculated subcutaneously or intravenously showed neither clinical signs such as paralysis of the legs nor weight loss. No virus was recovered from the brain. Intra-cerebral inoculation of RVV-mO induced no clinical signs in monkeys during the observation period of 7 days. Histopathological examination of the monkey brain specimen showed diffuse infiltration of mononuclear cells in the meninges and mild cellular cuffing in the parenchyma. Small amounts of the RVV-mO antigens and viral genome DNA were localized at the lesions by immunoflucence and in situ hybridization analyses.
These results indicate low neurovirulence of RVV constructed from the mO strain of vaccinia virus, suggesting safety as a recombinant live vaccine for humans.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] WATANABE,K.: "The immunogenicity of recombinant LC16mO vaccinia virus harboring HBs-Ag gene in mice." Biologicals. 19. 77-85 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] HOSHIKAWA,N.: "Role of the gag and pol genes of human immunodeficiency virus in the morphogenesis and maturation of retrovirus-like particles expressed by recombinantvaccinia virus:An ultrastructural study." J.gen.Virol.72. 2509-2517 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] MATSUDA,M.: "Two species of human CRK cDNA encode proteins with distinct biological activities." Mole.Cell.Biol.12. 3482-3489 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yalcin,S.: "Experimental infection of cynomolgus and African green monkeys with human herpesvirus 6." J.gen.Virol.73. 1673-1677 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Watanabe,K., Morita,M., Sato,T., Yasui,K. and Kojima,A.: "The immunogenicity of recombinant LC16mO vaccinia virus harboring HBsAg gene in mice." Biologicals. 19. 77-85 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hoshikawa,N., Kojima,A., Yasuda,A., Takayashiki,E., Masuko,S., Sata, T. and Kurata,T.: "Role of the gag and pol genes of human immunodeficiency virus in the morphogenesis and maturation of retrovirus-like particles expressed by recombinant vaccinia virus : An ultrastructural study." J.gen. Virol.72. 2509-2517 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Matsuda,M. Tanaka,S., Nagata,S., Kojima, A., Kurata,T. and Shibuya,M.: "Two species of human CRK cDNA encode proteins with distinct biological activities" Mole. cell. Biol.12. 3482-3489 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yalcin,S., Mukai,T., Kondo,K., Ami,Y., Okawa,T., Kojima,A., Kurata,T. and Yamanishi,K.: "Experimental infection of cynomolgus and African green monkeys with human herpesvirus 6" J. gen. Virol.73. 1673-1677 (1992)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1994-03-24  

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