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How do malarial parasites invade target organs of the vector mosquito?

Research Project

Project/Area Number 16390124
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Parasitology (including Sanitary zoology)
Research InstitutionMie University

Principal Investigator

YUDA Masao  Mie University, Faculty of Medicine, Assistant Professor, 大学院・医学系研究科, 助教授 (90293779)

Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 2005: ¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 2004: ¥7,700,000 (Direct Cost: ¥7,700,000)
KeywordsMalaria / ookinet / mosquito / membrane rupture / ハマダラ蚊 / 感染機構 / 中腸 / パーホリン様分子 / パーホリン
Research Abstract

After ingestion of infected blood by a mosquito, malarial parasites are fertilized in the mosquito midgut and develop into motile ookinetes. These ookinetes invade epithelial cells by rupturing the cell membrane and migrate through the cytoplasm toward the basal lamina, on which they develop to oocysts. In this study we found that a microneme protein with a membrane-attack complex and perforin (MACPF) -related domain, which we name membrane-attack ookinete protein (MAOP), is produced in the ookinete stage and plays an essential role in midgut invasion by the ookinete. Ookinetes with the MAOP gene disrupted completely lost infectivity to the midgut. After ingestion of blood infected with the disrupted parasite, the midgut epithelium remained intact, making a clear contrast with the damaged midgut epithelium invaded by wild-type ookinetes. Electron microscopic analysis showed that the disruptant ookinetes migrate to the gut epithelium and attach to the cell surface at the apical tip, but are unable to enter the cytoplasm by rupturing the cell membrane. These results indicate that the MAOP molecule acts on the plasma membrane of the host-cell-like mammalian MACPF family proteins that create pores in the membrane of target cells. Another previously identified MACPF-related molecule (SPECT2) is produced in the liver-infective sporozoite and has a crucial role in traversing the liver sinusoidal cell boundary. The present finding, thus, suggests that conserved mechanisms for membrane rupture involving MACPF-related proteins are used in different host invasive stages of the malarial parasite, playing a key role in breaching biological barriers of host organs.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (18 results)

All 2006 2005 2004

All Journal Article (18 results)

  • [Journal Article] CelTOS, a novel malarial protein that mediates transmission to mosquito and vertebrate hosts.2006

    • Author(s)
      Kariu T, Ishino T, Yano K, Chinzai Y, Yuda M.
    • Journal Title

      Mol. Microbiol. 59

      Pages: 1369-1379

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A calcium-dependent protein kinase regulates Plasmodium ookinete acces to the midgut epitherial cell.2006

    • Author(s)
      Ishino T, Chinzei Y, Orito Y, Yuda M
    • Journal Title

      Mol. Microbiol. 59

      Pages: 1175-1184

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] CelTOS, a novel malarial protein that mediates transmission to mosquito and vertebrate hosts.2006

    • Author(s)
      Kariu T, Ishino T, Yano K, Chinzei Y, Yuda M.
    • Journal Title

      Mol.Microbiol. 59

      Pages: 1369-1379

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A calcium-dependent protein kinase regulates Plasmodium ookinete access to the midgut epithelial cell.2006

    • Author(s)
      Ishino T, Chinzei Y, Orito Y, Yuda M
    • Journal Title

      Mol.Microbiol. 59

      Pages: 1175-1184

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] CalTOS, a novel malarial protein that mediates transmission to mosquito and vertebrate hosts2006

    • Author(s)
      Kariu T, Ishino T, Yano K, Chinzei Y, Yuda M.
    • Journal Title

      Mol.Microbiol. 59(5)

      Pages: 1369-1379

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A calcium-dependent protein kinase regulates Plasmodium ookinete access to the midgut epithelial cell.2006

    • Author(s)
      Ishino T, Orito Y, Chinzei Y, Yuda M.
    • Journal Title

      Mol.Microbiol. 59(4)

      Pages: 1175-1184

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Two proteins with 6-cys motifs are required for malarial parasites to commit to infection of the hepatocyte.2006

    • Author(s)
      Ishino T, Chinzei Y, Yuda M.
    • Journal Title

      Mol.Microbiol. 58(5)

      Pages: 1264-1275

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Two proteins with 6-cys motifs are required for malarial parasites to commit to infection of the hepatocyte.2005

    • Author(s)
      Ishino T, Chinzei Y, Yuda M
    • Journal Title

      Mol. Microbiol. 58

      Pages: 1264-1275

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Plasmodium sporozoite protein with a membrane for malarial parasites to commit to infection of the hepatocyte.2005

    • Author(s)
      Ishino T, Chinzei Y, Yuda M
    • Journal Title

      Cell Microbiol. 7

      Pages: 199-208

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Essential role of membrane- attack protein in malarial trnsmission to mosquito host.2005

    • Author(s)
      Kadota K, Ishino T, Matsuyama T, Chinzei Y, Yuda M
    • Journal Title

      Proc Natl Acad Sci U S A 101

      Pages: 16310-16315

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Two proteins with 6-cys motifs are required for malarial parasites to commit to infection of the hepatocyte.2005

    • Author(s)
      Ishino T, Chinzei Y, Yuda M.
    • Journal Title

      Mol.Microbiol. 58

      Pages: 1264-1275

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Plasmodium sporozoite protein with a membrane attack complex domain is required for breaching the liver sinusoidal cell layer prior to hepatocyte infection.2005

    • Author(s)
      Ishino T, Chinzei Y, Yuda M.
    • Journal Title

      Cell Microbiol. 7

      Pages: 199-208

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Essential role of membrane-attack protein in malarial transmission to mosquito host.2005

    • Author(s)
      Kadota K, Ishino T, Matsuyama T, Chinzei Y, Yuda M.
    • Journal Title

      Proc Natl Acad Sci USA. 101

      Pages: 16310-16315

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A Plasmodium sporozoite protein with a membrane attack complex domain is required for breaching the liver sinusoidal cell layer prior to hepatocyte infection.2005

    • Author(s)
      Ishino T, Chinzei Y, Yuda M.
    • Journal Title

      Cell Microbiol. 7(2)

      Pages: 199-208

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A Plasmodium sporozoite protein with a membrane attack complex domain is required for breaching the liver sinusoidal cell layer prior to hepatocyte infection2005

    • Author(s)
      Tomoko Ishino, Yasuo Chinzei, Masao Yuda
    • Journal Title

      Cellular Microbiology 7-2

      Pages: 199-208

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Liver invasion by malarial parasites--how do malarial parasites break through the host barrier2004

    • Author(s)
      Yuda M, Ishino T
    • Journal Title

      Cell Microbiol 6

      Pages: 1119-1125

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Liver invasion by malarial parasites-how do malarial parasites break through the host barrier? Review2004

    • Author(s)
      Yuda M, Ishino T.
    • Journal Title

      Cell Microbiol. 6

      Pages: 1119-1125

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Essential role of membrane-attack protein in malarial transmission to mosquito host2004

    • Author(s)
      Kimie Kadota, Tomoko Ishino, Takahiro Matsuyama, Yasuo Chinzei, Masao Yuda
    • Journal Title

      PNAS 101-46

      Pages: 16310-16315

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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