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Ultrastructural study on the virion morphogenesis in the hepatitis C virus-infected cells

Research Project

Project/Area Number 09470134
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Gastroenterology
Research InstitutionMie University

Principal Investigator

WATANABE Shozo  Mie University, Health Administration Center, Professor, 保健管理センター, 教授 (20134934)

Co-Investigator(Kenkyū-buntansha) IKOMA Jiro  Mie University, School of Medicine, Instructor, 医学部・附属病院, 助手 (80283521)
KAITO Masahiro  Mie University, School of Medicine, Instructor, 医学部, 講師 (70214244)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥13,100,000 (Direct Cost: ¥13,100,000)
Fiscal Year 1999: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1998: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1997: ¥9,000,000 (Direct Cost: ¥9,000,000)
Keywordshepatitis C virus (HCV) / HCV RNA / HCV core particle / HCV virion / IMY cell / immunogold electron microscopy / C型肝炎ウイルス / 回転焼付け法 / RTD-PCR / 金コロイド免疫電顕法 / HCVコア蛋白質
Research Abstract

Hybrid cells derived from human hepatocytes and HepG2 cells (IMY cells) were transfected with entire HCV cDNA including a novel 98-nucleotide sequence donwstream from the poly(U) stretch at the 3' end of the genome, and then the cells were infected with recombinant vaccinia virus or adenovirus expressing T7 RNA polymerase. Replication of the transfected HCV genome in the cells was evidenced by detecting the cellular expression of all HCV proteins and the presence of both positive-and negative-strand HCV RNAs. In the cells, clusters of 30-35 nm electron-dense viral core-like particles at the cytoplasmic amorphous matrix area and 50-60 nm virus-like particles within dilated cisternae of the endoplasmic reticulum were observed by conventional passing through electron microscopy. Some of the latter particles showed the budding feature of a virion into the cisternae of the endoplasmic reticulum. Indirect immunogold electron microscopy using antibodies to HCV core protein and HCV envelope pr … More otein revealed that 30-35 nm particles were HCV core particles and 50-60 nm particles were HCV virions. As to the culture media of these cells, negatively stained 55 - 65 nm spherical virus-like particles with surface spike-like projections were visualized in 1.12 - 1.15 g/ml sucrose density gradient fractions which contained the highest titers of HCV RNA. Indirect immunogold electron microscopy using anti-HCV envelope antibody characterized that these particles were HCV virions, as observed specific gold labeling to antibody haloes on the surface of HCV particles, and the virus morphology was similar to that in the HCV RNA-positive human plasma previously reported by us.
These findings show convincingly that HCV RNA replication and virus particle production are processed in the culture IMY cells introduced the full-length HCV cDNA by using transfection/infection protocol, and suggest that core proteins of HCV are synthesized and assembled into the core particles in the cytoplasm, and then bud into the cisternae of the endoplasmic reticulum to form the enveloped HCV virions. Less

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] 垣内雅彦、渡辺省三、他: "ヒト肝細胞由来IMY細胞におけるHCV増殖に関する免疫電子顕微鏡的研究"肝臓. 38(Supp.1). 86-86 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 垣内雅彦、渡辺省三: "C型肝炎とG型肝炎のウイルス粒子の構造"Modern Physician. 17(9). 1047-1050 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Masahiko Kaito, Shozo Watanabe, et al.: "Icosahedral hepatitis C virus core particles detected by immunoelectron microscopy and rotation technique"Hepatology. 30(4). 202A-202A (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 渡辺省三: "肝臓フォーラム'98記録集"原田尚、谷川久一. 186 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Shozo Watanabe, et al.: "Hepatitis C Protocols (Methods in Molecular Medicine, vol.19)"Johnson Yiu-Nam Lau. 621 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Masahiko Kaito, Shozo Watanabe, et al.: "Immunoelectron microscopic study on HCV replication in IMY cells derived from human hepatocytes"Acta Hepatologica Japonica. 38(Supple.1) (in Japanese). 86 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Masahiko Kaito, Shozo Watanabe: "Morphological features of virus particles of hepatitis C and hepatitis G"Modern Physician. 17(9) (in Japanese). 1047-1050 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Shozo Watanabe, Masahiko Kaito and Michinori Kohara: "Immunoelectron microscopic characterization of HCV. In Hepatitis C Protocols. ed. by Johnson Y.-N. Lau"Methods in Molecular Medicine (Humana Press Inc., Totowa, NJ). vol. 19. 279-285 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Shozo Watanabe: "Virion structure of hepatitis C virus particle (ed. by Takashi Harada and Kyuichi Tanikawa)"In Proceedings of Liver Forum '98 (Iji Shyuppan Co. Ltd., Tokyo). (in Japanese). 142-151 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Masahiko Kaito, Shozo Watanabe, et. al.: "Icosahedral hepatitis C virus core particles detected by immunoelectron microscopy and rotation technique"Hepatology. 30(4). 202A (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 藤田尚巳,渡辺省三,他: "低比重分画中に存在するC型肝炎ウイルス粒子の存在様式の検討"肝臓. 40(suppl.1). 304-304 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 古田さとり,渡辺省三,他: "リコンビナントBCGベクターを用いたHCV特異的細胞性免疫応答の誘導"肝臓. 40(suppl.2). 178-178 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kaito M,Watanabe S,et al: "Icosahedral hepatitis C virus core particles detected by immunoelectron microscopy and rotation technique"Hepatology. 30(4). 202A-202A (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 亀井昭,渡辺省三,他: "Elongation factor 1-α(EF1-α) promoterを用いた発現ベクターによるC型肝炎ウイルス(HCV)特異的細胞障害性T細胞(CTL)の誘導"肝臓. 40(suppl.3). 118-118 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 古田さとり,渡辺省三,他: "C型肝炎ウイルス(HCV)抗原ペプタイドのin vivo electroporation 法による細胞障害性Tリンパ球(CTL)の誘導"肝臓. 40(suppl.3). 179-179 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Watanabe S,Kaito M,et al: "Immunoelectron microscopic characterization of HCV" Methods in Molecular Medicine,Hepatitis C Protocols. 19. 279-285 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kohara M,Watanabe S,et al: "Maturation process of virion-like structure in transfected IMY cells with entire HCV genome" 5th International Meeting on Hepatitis C Virus and Related Viruses. Abstracts. B2-B2 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 渡邉省三: "HCV粒子の構造" 肝臓フォーラム'98記録集. Part II. 142-151 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 垣内雅彦,渡邉省三,他: "C型肝炎ウイルス感染血中の免疫複合体に関する超微形態学的検討" 日本内科学会雑誌. 89(増刊). 201-201 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 石田聡,渡邉省三,他: "HCVcore粒子の超微形態に関する金コロイド免疫電顕的研究" 肝臓. 39(suppl.1). 126-126 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 藤田尚己,渡邉省三,他: "C型肝炎ウイルス粒子の感染患者血液中における浮遊密度別存在形態" 肝臓. 39(suppl.2). 278-278 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kohara M,Watanabe S, et al: "Detection and passage of virion-like structure in transfected IMY cells with entire HCV genome" 4th Internatioal Meeting on Hepatitis C Virus and Related Viruses-Molecular Virology and Pathogenesis. Abstracts. 31-31 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kaito M,Watanabe S, et al: "Propagation features of hepatitis C virus in IMY-4 cells transfected with entire HCV genome:observation by immunogold electron microscopy" 4th Internatioal Meeting on Hepatitis C Virus and Related Viruses-Molecular Virology and Pathogenesis. Abstracts. 85-85 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Ishida S,Watanabe S, et al: "Hepatitis C virus core particle detected by immunogold electron microscopic study" 4th Internatioal Meeting on Hepatitis C Virus and Related Viruses-Molecular Virology and Pathogenesis. Abstracts. 86-86 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 垣内雅彦,渡邉省三,他: "ヒト肝細胞由来IMY細胞におけるHCV増殖に関する免疫電子顕微鏡的研究" 肝臓. Supple・1. 86-86 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 藤田尚己,渡邉省三,他: "HCV浮遊密度に及ぼすParaformaldehyde処理の影響" 肝臓. Supple・3. 85-85 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 垣内雅彦,渡邉省三,他: "C型肝炎とG型肝炎のpウイルス粒子の構造" Modern Physician. 17・9. 1047-1050 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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