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Analyses of protection mechanisms against Candida albicans infection in various animal models

Research Project

Project/Area Number 61570202
Research Category

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

Allocation TypeSingle-year Grants
Research Field 細菌学
Research InstitutionChiba University

Principal Investigator

MIKAMI Yuzuru  Res. Center Patho. Fungi and microbial Toxicoses, Chiba Univ. Associ Prof., 真核微生物研究センター, 助教授 (40092100)

Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1987: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1986: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsCandidiasis / mouse infection model / effectors / BRM / amphotericin B / Conbination therapy / レンチナン / レバミゾール / 免疫増強物質 / カンジダ感染 / 感染防御効果
Research Abstract

Although candidiasis is the most commonly observed systemic mycosis in a compromised host, constituting a significant percentage of all infections, the mechanisms of host defense against the infection have not been fully understood. Two major types of defense mechanisms, one non-specific and one-speci-fic, have been considered responsible for the resistance to candidiasis. In this study, firstly it was aimed to develop useful model for the study of fungal infections and analyses of effector cells which play an important defensive role against fungal infections. Secondly, actual analitic studies of various effectors in these newly developed models using various BRMs(biological response modifiers).
Throughout the present studies, it was confirmed that intravenous or intraperitoneal infection models in mice is still useful ones for the test of the effectiveness of various BRMs as well as antifungal chemotherapeutics. However, itwas found that in these intravenous or intraperitoneal Candida … More albicans infection models,infection is too early to manifest complicated host defense mechanisms: therefore, those systemic candemia models are not always suitable for studies of the progressive development of host resistance to the infection. The other problem is that when mice are infected with Candida by the i.v. or i.p. route, the organisms grow in the connecting tubles or in the pelvis of the kidneys even after the host defense mechanisms in other organs have fully marshalled their forces to eradicate the Candida cells The host defense against C. albicans is assumed to be diminished in the kidney due to its functional or structural characteristics. However, compared to these progressive candemia models, in mouse thigh lesion model reported by the present studies, a mouse does not die from the infection, and the host defense mechanisms can fully develop and operate without being impaired by other factors. Therefore, this model was considered to be useful for the study histopathological mechanisms of infections. Further studies, however, also indicated that mouse thigh lesion model has also disadvantages and is not suitable for the test of antifungal activity of chemotherapeutic agents, because even amphotericin B, flucytosine or ketoconazole does not exhibited any activities in this model. Our studies using these models also showed the possibilities that different effector cells play an important role in different infection models for the eradication of fungal elements.
Active roles of interferons and interleukins produced by BRMs against fungal infections are also confirmed. Less

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] Y.Mikami et al.: Proc.14th Inter.COngress of Chemotherapy. 1. 1952-1953 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 陳豪勇他: 医真菌誌. 28. 306-315 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] H.-Y.Chen et al.: Jpn.J.Med.Mycol.28. 262-269 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T.Arai et al.: Proc.14th International Congress of Microbiology. 1. 155 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 三上襄他: 医真菌誌. 28. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y.Mikami et al.: "Mouse thigh lesion model for the study of defence mechanisms against Candida albicans and evaluation of antifungal activity" Elsevier Science Publisher Amsterdam, 305 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] H. -Y. Chen et al.: "Protection activity induced by the bacterial vaccine, heat-killed Clostridum butyricum against Candida albicans infections in mice." Jpn.. J. Med. Mycol.28. 3?6-316 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] H. -Y. Chen et al.: "Protective effects of various BRMs against Candida albicans infections." Jpn. J.Med Mycol.28. 262-269 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y. Mikami et al.: "Isolation of Candida albicans mutants sensitive to antifungal imidazoles." Proc. 14th International Congress of Chemotherapy. 2. 1952-1953 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T. Arai et al.: "Paecilotoxin (leucinostatin), a possible etiological agents for opportunistic fungal infection." Proc. 14th International Congress of Microbiology, IUMS. 1. (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y. Mikami et al.: "Some new approches to evaluation of antifungal activities of amphotericin B" Jpn. J. Med. Mycol.28. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Y. Mikami et al.: Mouse thigh lesion model for the study of defence mehcanisms against Candida albicans and evaluation of antifungal activity. Elsevier Science Pub. Amsterdam, 305 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 金田暁,三上襄: 日本医真菌学会誌(真菌と真菌症). 28. (1987)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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