• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Investigation of the molecular mechanisms of malarial ookinete invasion into the mosquite midgut epithelium in the rodent mararial parasite, Plasmodium berghei

Research Project

Project/Area Number 12470060
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

YUDA Masao  Mie University, Faculty of Medicine, Research Associate, 医学部, 助手 (90293779)

Co-Investigator(Kenkyū-buntansha) ANDO Kastuhiko  Mie University, Faculty of Medicine, Associate Professor, 医学部, 助教授 (90024710)
CHINZEI Yasuo  Mie University, Faculty of Medicine, Professor, 医学部, 教授 (60024709)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥14,300,000 (Direct Cost: ¥14,300,000)
Fiscal Year 2002: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2001: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2000: ¥8,800,000 (Direct Cost: ¥8,800,000)
KeywordsMalaria / mosquite / ookinete / sporozoite / infection / molecular mechanisms / ネズミマラリア / CTRP / ノックアウト原虫 / ハマダラカ / 接着侵入
Research Abstract

To search for genes playing roles in malarial infection of the mosquito vector, we constructed EST databases of the vector stages of rodent malarial parasite. We selected some genes from these databases and prepared knock-out parasites of each gene. As criteria for selection, we adopted presence of the N-terminal signal peptide, because this indicates that the gene products may play a role in parasite interactions with the vector mosquito. In this study, we identified some genes that play a critical role in malarial parasite infection of mosquito organs. One of them encodes 21kDa protein with a secretory protein-lilke structure and is necessay for ookinete invasion into the midgut epithelium. We performed immuno-electeon microscopy and found that this protein is localized in the micronemes. Other one encodes an attachment protein-like molecule and is expressed by the sporozoite in the oocyst but not by the salivary gland sporozoite. By disruption of this gene, we demonstrated that it is essential for the malarial parasite to infect the mosquito salivary gland.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Masao Yuda, Kazuhiko Yano, Takafumi Tsuboi, Motomi Torii, Yasuo Chinzei: "von Willebrand Factor A Domain-related Protein : a novel micoroneme protein or the malaria ookinet ehighly conserved throughout Plasmodium parasites"Mol. Bolchem. Parasitol.. 116. 65-72 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] W.Limviroj, K.Yano, M.Yuda, K.Ando, Y.Chinzei: "Immuno-electron microscopic observation of Plasmodium berghei CTRP localization in the midgut of vector mosquito, Anopheles stephensi"J. Parasitol.. 88. 664-672 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Haruhiko Isawa, Masao Yuda, Yuki Orito, Yasuo Chinzei: "Mosquito salivary protein inhibits activation of a contact system by binding to factor XII and high molecular weight kininogen"J. Bio. Chem.. 277. 27651-27658 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Toru Kariu, Masao Yuda, Kazuhiko Yano, Yasuo Chinzei: "MAEBL is essential for malarial sporozoite infection of the mosquito salivary gland"J. Exp. Med.. 195. 1317-1323 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S.Iwanaga, M.Okada, H.Isawa, A.Morita, M.Yuda, Y.Chinzei: "Identification and characterization of novel salivary thrombin inhibitors from the ixodidae tick, Haemaphysalis longicornis"Eur. J. Biochem.. (in press). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Masao Yuda, Kazuhiko Yano, Takafumi Tsuboi, Motomi Torii and Yasuo Chinzei: "von Willebrand Factor A Domain-related Protein : a novel microneme protein of the malaria ookinete highly conserved throughout Plasmodium parasites"Mol.Bolchem.Parasitol.. 116. 65-72 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Toru Kariu, Masao Yuda, Kazuhiko Yano and Yasuo Chinzei: "MAEBL is essential for malarial sporozoite infection of the mosquite salivary gland"J.Exp.Med.. 195. 1317-1323 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] W.Limviroj, K.Yano, M.Yuda, K.Ando and Y.Chinzei: "Immuno-electron microscopic observation of Plasmodium berghei CTRP localization in the midgut of vector mosquite, Anopheles stephens"J.Parasitol.. 88. 664-672 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Haruhiko Isawa, Masao Yuda, Yuki Orito and Yasuo Chinzei: "Mosquito salivary protein inhibits activation of a contact system by binding to factor XII and high molecular weight kininogen"J.Biol.Chem.. 277. 27651-27658 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] S.Iwanaga, M.Okada, H.Isawa, A.Morita, M.Yuda and Y.Chinzei: "Identification and characterization of novel salivary thrombin inhibitors from the ixodidae tick, Haemaphysalis longicornis"Eur.J.Biochem.. (in press). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Toru Kariu, Masao Yuda, Kazuhiko Yano, Yasuo Chinzei: "MAEBL is essential for malarial sporozoite infection of the mosquito salivary gland"J. Exp. Med.. 195. 1317-1323 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] W.Limviroj, K.Yano, M.Yuda, K.Ando, Y.Chinzei: "Immuno-electron microscopic observation of Plasmodium berghei CTRP localization in the midgut of vector mosquito, Anopheles stephensi"J. Parasitol.. 88. 664-672 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Haruhiko Isawa, Masao Yuda, Yuki Orito, Yasuo Chinzei: "Mosquito salivary protein inhibits activation of a contact system by bindingto factor XII and high molecular weight kininogen"J. Biol. Chem.. 277. 27651-27658 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Iwanaga, M.Okada, H.Isawa, A.Morita, M.Yuda, Y.Chinzei: "Identification and characterization of novel salivary thrombin inhibitors from the ixodidae tick, Haemaphysalis longicornis"Eur. J. Biochem.. (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Masao Yuda, et.al.: "von Willebrand Factor A domain-related protein:a novel microneme protein of the malaria ookinete highly conserved"Mol.Biochem.Partasitol.. 116. 65-72 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Toru Kariu, et.al.: "Essential function of MAEBL in malarial sporozoite infection of the mosquito salivary gland"J.Exp.Med.. (in press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] J.Fu, et al.: "Epitope-specific impairment of production of antibody against merozoite surface glycoprotein 1 of Plasmodium in symptomatic with malaria."Parasitol.Res.. 86:. 345-351 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Jun Fu, et al.: "A simple screening method detecting bindings between oligopeptides and HLA-DR molecules on filter paper : Possible application for mapping of putative helper T cell epitopes on MSPI of Plasmodium falciparum."Microbiol.Immunol.,. 44:. 249-257 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Adachi, et al.: "Detection of congenital malaria by polymerase-chain reaction methodology in Dar es Salaam, Tanzania."Parasitol Res.. 86:. 615-618 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Adachi, et al.: "Scant parasitemia in balb/c mice with congenital malaria infection."J.Parasitol.,. 86:. 1030-1034 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Yuda, et al.: "von Willebrand Factor A Domain -related Protein : A novel micoroneme protein of Plasmodium berghe."Mol.Bolchem.Parasitol.. (in press).

    • Related Report
      2000 Annual Research Report

URL: 

Published: 2000-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi