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GENE EXPRESSION RESPONDED TO FAS STIMULATION IN TRAYPANOSOMA CRUZI INFECTED HOST CELLS USING DNA MICROARRAY TECHNIQUE

Research Project

Project/Area Number 14570221
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 寄生虫学(含医用動物学)
Research InstitutionJUNTENDO UNIVERSITY

Principal Investigator

SHIMADA Junko  JUNTENDO UNIVERSITY, SCHOOL OF MEDICINE, SENIOR LECTURER, 医学部, 講師 (20211964)

Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2003: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2002: ¥2,900,000 (Direct Cost: ¥2,900,000)
KeywordsDNA MICROARRAY / TRYPANOSOMA / APOPTOSIS INHIBITION / FAS / C-FLIP / INFECTED ANIMAL MODEL / cFLIP
Research Abstract

Thypanosoma cruzi the protozoan parasite that causes Chagas' disease in Latin America. We reported that T.cruzi infection inhibits Fas-mediated apoptosis in host cells, and this inhibition is thought to be a defense strategy for the parasite to escape from host immune responses. To elucidate a molecular mechanism of the inhibition, we determined the time courses of transcriptional changes in uninfected (control) and T.cruzi infected cells using DNA microarray technology. Human fibrosarcoma cells were infected with T.cruzi, cultured for 3-4 days and stimulated by anti-Fas antibody. Total RNA was extracted and converted to first-strand cDNA: cDNA was labeled with Cy5-dUTP (control) or Cy3-dUTP (infected) and hybridized to human apoptosis chips consisting of 164 apoptosis related genes. Apoptosis inhibitory genes (apoptosis inhibitor 1 and c-FLLIP) and caspases (caspase-1, -4, and -7) showed higher expression levels in T.cruzi infected than in control cells at 10 to 30 mm after Fas stimulation. Further, the fluorescence intensities of I-kB, bcl-W and cell cycle related genes were higher in infected cells at 2 to 24 h after the induction. To determine the consequences of a T.cruzi infection on apoptosis in vivo, we infected Wistar rats with either the T.cruzi Sylvio-X10/7 clone or the Sylvio-X10/4 clone to simulate an acute (lethal) or chronic disease model, respectively. At predetermined times post-infection, paraffin sections of the rats' hearts were processed using the TUNEL reaction to detect apoptotic cells. In the lethal disease model, inflammatory lymphocytes were found around T.cruzi-infected muscle cells at 7 days post-infection. Surprisingly, however, although some of the lymphocytes were TUNEL positive, T.cruzri-infected muscle cells were TUNEL negative. Furthermore, in the chronic disease model it was difficult to find either T.cruzi infected cells or apoptotic cells in the heart sections.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Uchiyama N.: "Trypanocidal terpenoids from Laurus nobilis L."Chem.Pharm.Bull.. 50. 1514-1516 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 嶋田淳子: "Trypanosoma cruziと宿主細胞のアポトーシスをめぐるせめぎあい"The 72^<nd> Annual Meeting of The Japanese Society of Parasitology. 73 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 嶋田淳子, 北潔: "病態とアポトーシス:寄生虫感染"臨床免疫. 38. 395-403 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Uchiyama N.: "Trypanocidal terpenoids from Laurus nobilis L."Chem.Pharm.Bull.. 50. 1514-1516 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] SHimada J.: "The struggle between the host cell and Typanosoma cuzi; Infected host cell may have promoted own apoptosis but the parasite inhibits it."The 72^<nd> Annual Meeting of The Japanese Society of Parasitology. 73 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Shimada J.: "Pathology and apoptosis: parasite infection."Rinsho Men-eki. 38. 395-403 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Uchiyama N.: "Trypanocidal terpenoids from Laurus nobilis L."Chem.Pharm.Bull.. 50. 1514-1516 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] 嶋田淳子: "Trypanosoma cruziと宿主細胞のアポトーシスをめぐるせめぎあい"The 72^<nd> Annual Meeting of The Japanese Society of Parasitology. 73 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 嶋田淳子, 北潔: "病態とアポトーシス:寄生虫感染"臨床免疫. 38巻増刊. 395-403 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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