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1995 Fiscal Year Final Research Report Summary

Gene cloning of novel proteins produced by Legionella grown in macrophages

Research Project

Project/Area Number 06670312
Research Category

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

Allocation TypeSingle-year Grants
Research Field Bacteriology (including Mycology)
Research InstitutionUniversity of Occupational and Environmental Health

Principal Investigator

YOSHIDA Shin-ichi  University of Occupatinal and Environmental Health, Microbiology, Professor, 医学部, 教授 (60128113)

Co-Investigator(Kenkyū-buntansha) MIYAMOTO Hiroshi  University of Occupatinal and Environmental Health, Microbiology, Assistant Prof, 医学部, 助手 (40229894)
Project Period (FY) 1994 – 1995
KeywordsLegionella / intracellular parasite / macrophage / cloning
Research Abstract

L.pneumophila Philadelphia-1 produced massive 24kDa protein during the intracellular growth in guinea pig macrophages. Using allelic exchange mutagenesis, a site-specific mutation was introduced into a gene encoding the 24kDa protein, and then we got a mutant UOEH strain. The mutant strain had a lower virulence than the parent strain to guinea pigs. Distribution of the gene among bacteria (7 species, 52 strains) was studied by Southern hybridazation. Only L.pneumophila had the 24kDa protein gene. These results suggest that the 24kDa protein is a virulence factor of L.pneumophila.
We found that one strain of Legionella dumoffii infected to Vero cells in vitro at a high rate. The L.dumoffii strain entered into Vero cells by receptor-mediated endocytosis which is inhibited by N-acetylglucosamine. It was found by electron microscopy that L.dumoffii lysed endosome membrane, escaped into cytoplasm and then proliferated there. These findings show a pleomorphism among Legionella species to enter into and proliferate in host cells.

  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Miyamoto, H. et al.: "Protein profiles of Legionella pneumophila Philadelphia-1 grown in macrophages and characterization of a gene encoding a novel 24kDa Legionella protein." Microbial Pathogenesis. 15. 469-484 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ogawa, M. et al.: "2-deoxy-D-glucose inhibits intracellular multiplication and promotes intracellular killing of Legionella pneumophila in A/J mouse macrophages." Infection and Immunity. 62. 266-270 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kikuhara, H. et al.: "Intracellular multiplication of Legionella pneumophila in Tetrahymena thermophila." JUOEH. 16. 263-275 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 吉田真一 ら: "レジオネラ属菌の比較生物学-宿主との相互関係を中心として-" 日本細菌学雑誌. 50. 745-764 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Miyamoto, H. et al.: "Temperature effects on Legionella pneumophila killing by and multiplication in phagocytes of guinea pigs." Microbiology and Immunology. 39. 674-654 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Beckers, M. C. et al.: "Natural resistance to infection with Legionella pneumophila: chromosomal localization of the Lgn 1 susceptibility gene." Mammalian Genome. 6. 540-545 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Fujio, H. et al.: "Decreased capacity of aged mice to produce interferon-gamma in Legionella pneumophila infection." Mechanisms of Ageing and Development. 81. 97-106 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Matsuzaki, M. et al.: "Intracellular multiplication of Legionella pneumophila in HL-60 cells functionally differentiated in response to 22-oxacalcitriol." Journal of Leukocyte Biology. 57. 574-580 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 藤井潤 ら: "レジオネラ感染症の基礎と対策-特に作業環境管理の立場から-" 産業医科大学雑誌. 18. 61-76 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Miyamoto, H. et al.: "Spectrum of Legionella species whose intracellular multiplication in murine macrophages is genetically controlled by Lgn 1." Infection and Immunity. 64(in press). (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Miyamoto, H., Yoshida, S., Taniguchi, H., Qin, M.H., Fujio, H., Mizuguchi, Y.: "Protein profiles of Legionella pneumophila Philadelphia-1 grown in macrophages and characterization of a gene encoding a novel 24kDa Legionella protein." Microbial Pathogenesis. 15(6). 469-484 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ogawa, M., Yoshida, S., Mizuguchi, Y.: "2-deoxy-D-glucose inhibits intracellular multiplication and promotes intracellular killing of Legionella pneumophila in A/J mouse macrophages." Infection and Immunity. 62(1). 266-270 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kikuhara, H., Ogawa, M., Miyamoto, H., Nikaido, Y., Yoshida, S.: "Intracellular multiplication of Legionella pneumophila in Tetrahymena thermophila." Journal of University of Occupational and Environmental Health. 16(4). 263-275 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshida, S., Miyamoto, H., Ogawa, M.: "Comparative biology of Legionella species-with special reference to hostparasite relationships- (in Japanease)" Japanease Journal of Bacteriology. 50(3). 745-764 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Miyamoto, H., Ogawa, M., Maruta, K., Nikaido, Y., Yamamoto, C., Taniguchi, H., Yoshida, S.: "Temperature effects on Legionella pneumophila killing by and multiplication in phagocytes of guinea pigs." Microbiology and Immunology. 39(9). 647-654 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Beckers, M.C., Yoshida, S., Morgan K., Skamene E., Gros P.: "Natural resistance to infection with Legionella pneumophila : chromosomal localization of the Lgnl susceptibility gene." Mammalian Genome. 6. 540-545 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Fujio, H., Kawamura, I., Miyamoto, H., Mitsuyama, M., Yoshida, S.: "Decreased capacity of aged mice to produce interferon-gamma in Legionella pneumophila infection." Mechanisms of Ageing and Development. 81. 97-106 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Matsuzaki, M., Shimamoto, Y., Watanabe, M., Kukita, A., Yoshida, S., Tadano, J.: "Intracellular multiplication of Legionella pneumophila in HL-60 cells functionally differentiated in response to 22-oxacalcitriol." Journal of Leukocyte Biology. 57. 574-580 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Fujii, J., Arima, K., Miyamoto, H., Yoshida, S.: "Legionella infection in occupational and environmental health. (in Japanease)" Journal of University of Occupational and Environmental Health. 18(1). 61-76 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Miyamoto, H., Maruta, K., Ogawa, M., Beckers, M.C., Gros, P., Yoshida, S.: "Spectrum of Legionella species whose intracellular multiplication in murine macrophages is genetically controlled by Lgn1." Infection and Immunity. 64 : (in press). (1996)

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

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Published: 1997-03-04  

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