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2004 Fiscal Year Final Research Report Summary

The roles of endogenous retroviruses as cofactors of pathogenic retroviral infections

Research Project

Project/Area Number 15580258
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Basic veterinary science/Basic zootechnical science
Research InstitutionObihiro University of Agriculture and Veterinary Medicine (2004)
Osaka University (2003)

Principal Investigator

MIYAZAWA Takayuki  Obihiro University of Agriculture and Veterinary Medicine, Department of Applied Veterinary Medicine, Associate Professor, 畜産学部, 助教授 (80282705)

Co-Investigator(Kenkyū-buntansha) OHNO Koh-ichi  The University of Tokyo, Department of Veterinary Internal Medicine, Associate Professor, 大学院・農学生命科学研究科, 助教授 (90294660)
Project Period (FY) 2003 – 2004
KeywordsFeLV / endogenous retroviruses / FeLIX / Receptors / Pit1 / AIDS / Cats / T lymphocytes
Research Abstract

T-lymphotropic feline leukemia virus (FeLV-T) is a highly pathogenic variants of FeLVs, and induces feline AIDS (FAIDS) in cats. FeLV-T is fusion- defective because its PHQ motif, gammaretroviral consensus motif in the N-terminal regions of envelope protein, has substitution of histidine to aspartate. Infection of FeLV-T requires FeLIX, a truncated envelope protein encoded by an endogenous FeLV (enFeLV) for transactivation its infectivity and Pit1 for FeLIX-binding. Although Pit1 distributes in many cells, the expression of FeLIX is expressed only in some lymphoid organs. Therefore, it has been thought that the host cell range of FeLV-T is restricted to cells expressing FeLIX. However, because FeLIX is a soluble factor and expressed constantly, we presumed that FeLIX is present in blood and evaluated FeLIX activities in sera of various mammalian species by LacZ pseudotype assay. Here, we demonstrated that cat serum has FeLIX activity at functional level, suggesting that FeLIX is present abundantly in the internal environment of a cat and FeLV-T may be able to infect cells expressing Pit1 regardless FeLIX expression in vivo. We also confirmed that FeLIX did not inhibit FeLV-B infection despite FeLIX and FeLV-B exhibit the same receptor usage. These results implies that FeLIX may work just negatively for the host defence against the infection of exogenous viruses.

  • Research Products

    (12 results)

All 2005 2004

All Journal Article (12 results)

  • [Journal Article] The effect expression of complement regulatory protein on pig endothelial cells to pig endogenous retrovirus (PERV) lyses by human sera.2005

    • Author(s)
      Hazama, K., et al.
    • Journal Title

      Transplantation Proceedings 37

      Pages: 503-505

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Characterization of Env antigenicity of feline foamy virus (FeFV) using FeFV-infected cat sera and a monoclonal antibody.2005

    • Author(s)
      Phung, T.T.H., et al.
    • Journal Title

      Veterinary Microbiology 106

      Pages: 201-207

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Prevention of PERV infections in pig to human xenotransplantation by the RNA interference silences gene.2005

    • Author(s)
      Miyagawa, S., et al.
    • Journal Title

      Journal of Biochemistry 137

      Pages: 503-508

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Cell-binding properties of the envelope proteins of porcine endogenous retroviruses.2005

    • Author(s)
      Watanabe, R., et al.
    • Journal Title

      Microbes and Infection 7

      Pages: 658-665

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The Effect of Expression of Complement Regulatory Protein on Pig Endothelial Cells is Pig Endogenous Retrovirus (PERV) lyses by human sera.2005

    • Author(s)
      Hazama, K., Miyagawa, S., Yamamoto, A., Kubo, T., Miyazawa, T., Tomonaga, K., Watanabe, R., Okumura, M., Matsuda, H., Shirakura, R.
    • Journal Title

      Transplant Proc. 37

      Pages: 503-505

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Characterization of Env antigenicity of feline foamy virus (FeFV) using FeFV-infected cat sera and a monoclonal antibody.2005

    • Author(s)
      Phung, T.T.Hang, Tohya, Y., Miyazawa, T., Akashi, H.
    • Journal Title

      Vet.Microbiol. 106

      Pages: 201-207

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Prevention of PERV infections in pig to human xenotransplantation by the RNA interference silences gene.2005

    • Author(s)
      Miyagawa, S., Nakatsu, S., Nakagawa, T., Kondo, A., Matsunami, K., Hazama, K., Yamda, J., Tomonaga, K., Miyazawa, T., Shirakura, R.
    • Journal Title

      J.Biochem. 137

      Pages: 503-508

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Cell-binding properties of the envelope proteins of porcine endogenous retroviruses.2005

    • Author(s)
      Watanabe, R., Miyazawa, T.*, Matsuura, Y.
    • Journal Title

      Microbes Infect. 7

      Pages: 658-665

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Comparison of serum sensitivity of psudotype retroviruses produced from newly established packaging cell lines of human and feline origins.2004

    • Author(s)
      Watanabe, R., et al.
    • Journal Title

      Virus Research 99

      Pages: 89-93

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Use of CD134 as a primary receptor by the feline immunodeficiency virus.2004

    • Author(s)
      Shimojima, M., et al.
    • Journal Title

      Science 303

      Pages: 1192-1195

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Comparison of serum sensitivity of pseudotype retroviruses produced from newly established packaging cell lines of human and feline origins.2004

    • Author(s)
      Watanabe, R., Miyazawa, T*., Matsuura, Y.
    • Journal Title

      Virus Res. 99

      Pages: 89-93

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Use of CD134 as a primary receptor by the feline immunodeficiency virus.2004

    • Author(s)
      Shimojima, M., Miyazawa, T., Ikeda, YU., McMonagle, E.L., Haining, H., Akashi, H., Takeuchi, Y., Hosie, M.J., Willett, B.J.
    • Journal Title

      Science 303

      Pages: 1192-1195

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

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Published: 2007-12-13  

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