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Malarial development in mosquito and vaccine development. Mechanism of malarial sporozoite accumulation in the salivary glands of Anopheline mosquitoes.

Research Project

Project/Area Number 06045019
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionUniversity-to-University Cooperative Research
Research InstitutionMie University

Principal Investigator

ANDO Katsuhiko  Faculty of Medicine, Mie University, 医学部, 助教授 (90024710)

Co-Investigator(Kenkyū-buntansha) RAIKHEL Alex  ミシガン州立大学, 昆虫学科, 教授
CHINZEI Yasuo  Faculty of Medicine, Mie University, 医学部, 教授 (60024709)
RAIKHEL Alexander S  Michigan State University
三浦 健  三重大学, 医学部, 助手 (60219582)
松岡 裕之  三重大学, 医学部, 講師 (10173816)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥6,100,000 (Direct Cost: ¥6,100,000)
Fiscal Year 1996: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1994: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsPlasmodium berghei / Sporozoite / Mosquito / Salivary gland / マラリア原虫 / スポロゾイト / ハマダラカ / 唾腺 / ワクチン
Research Abstract

We studied the mechanism of malarial sporozoite accumulation of Plasmodium berghei in the salivery gland of Anopheles stephensi.
1. We got following results with the observation of midgut infected with Plasmodium berghei by transmission electron microscope (TEM).
(1) Ookinate reached the basal lamina of midgut through the cell junction 24 hours after blood was ingested. (2) Two days after infection, ookinate whose diameter was 6 um has stopped moving and became round. (3) Eight days after infection, there were many nuclei which developed into sporozoites inside the oocyst. (4) Fourteen days after infection, oocyst developed matured oocyst, and many sparozoite exsisted around the core.
2. To observe the penetration of the sporozoites into salivary glands, we fixed living mosquitoes by 2.5% osmium and dissected them to remove the salivary glands after 2 hours. We got following results by scanning electron microscope and TEM.
(1) Sporozoites exsisted on the surface and some of them were penetrating in the salivary glands. (2) Inside of the salivary glands, sporozoites entered the cytoplasm of the cell from outside and gathered in the secretory cavity.
3. We extracted mRNA from salivery gland of mosquito and synthesized cDNA.The cDNA was ligated lambdagtll phage and cDNA libraries were produced. These were screened by the monoclonal antibody of salivery gland and 4 possitive clones were selected. The size of insert of 4 clones were 1450bp, 360bp, 220bp and 790bp.

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] Y,Satou,H.Matsuoka,M.Araki,K.Ando,Y.Chinzei: "Effect of temperature to Plasodium berghei and P.yoelii on mosquito stage in Anopheles stephensi" Jpn.J.Parasitol.45. 98-104 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Satou, H.Matsuoka, M.Araki, K.Ando, Y.Chinzei: "Effect of temperature to Plasodium berghei and P.yoelii on mosquito stage in Anopheles stephensi" Jpn.J.Parasitol. 45. 98-104 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Satou,H.Matsuoka,M.Araki,K.Ando,Y.Chinzei: "Effect of temperature to Plasodium berghei and P.yoelii on mosquito stage in Anopheles stephensi" Jpn.J.Parasitol.45. 98-104 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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