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Understanding the potential role of LSA3, a novel malaria vaccine candidate, during erythrocyte invasion by Plasmodium falciparum

Research Project

Project/Area Number 18K15138
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 49040:Parasitology-related
Research InstitutionEhime University

Principal Investigator

Morita Masayuki  愛媛大学, プロテオサイエンスセンター, 講師 (60709632)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsマラリア / 寄生虫 / ワクチン / LSA3 / 赤血球侵入 / 発症阻止 / イメージング / 熱帯熱マラリア原虫 / ワクチン候補 / デンスグラニュール
Outline of Final Research Achievements

Genetic deletion of the malaria vaccine candidate protein LSA3 reduced the growth rate of the blood-stage Plasmodium falciparum parasites. Time-lapse imaging during red blood cell invasion suggested that the LSA3 deficient parasite had a delayed invasion compared to the wild-type parasite. In addition, endogenous LSA3 was secreted at late stages of red blood cell invasion and localized at the posterior part of the invading merozoite. These findings suggest that LSA3 plays important roles in the late stages of red blood cell invasion by Plasmodium falciparum.

Academic Significance and Societal Importance of the Research Achievements

マラリア原虫の赤血球侵入はワクチンや治療薬のターゲットとして精力的に研究が進められているが、その侵入メカニズムには未解明な部分が多い。マラリア原虫は赤血球侵入のために緻密に制御されたステップを踏んでいるが、その中でもLSA3は侵入後期に関わることが示唆された。今後、LSA3の機能解析を進めることでマラリア原虫の赤血球侵入の分子メカニズムの一端を明らかにでき、マラリアワクチン開発に貢献できると考える

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (7 results)

All 2020 2019 2018

All Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Presentation] Characterization and imaging analysis of PfLSA3, a dense granule protein, during erythrocyte invasion of malaria merozoites.2020

    • Author(s)
      Morita M, Jennison C, Ishino T, O’Neill MT, Boddey JA, Takashima E, Tsuboi T
    • Organizer
      MAM 2020, Molecular Approaches to Malraia
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 熱帯熱マラリア原虫メロゾイトのデンスグラニュール分子LSA3の性状解析2020

    • Author(s)
      森田将之、Charlie Jennison、石野智子、Matthew O’Neill, Justin A. Boddey、高島英造、坪井敬文
    • Organizer
      第89回日本寄生虫学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Characterization of LSA3, a blood-stage malaria vaccine candidate, during erythrocyte invasion of a malaria merozoite.2019

    • Author(s)
      Morita M, Jennison C, Ishino T, O’Neill MT, Boddey JA, Takashima E, Tsuboi T
    • Organizer
      The 17th Protein Island Matsuyama (PIM) International Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization and imaging analysis of a blood-stage vaccine candidate, PfLSA3, during erythrocyte invasion of malaria merozoites.2019

    • Author(s)
      Morita M, Jennison C, Ishino T, O’Neill MT, Boddey JA, Takashima E, Tsuboi T
    • Organizer
      ASTMH 68th annual meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マラリアワクチン候補LSA3の赤血球侵入時動態解析2019

    • Author(s)
      森田将之
    • Organizer
      第27回分子寄生虫学ワークショップ・第17回分子寄生虫・マラリア研究フォーラム合同大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] マラリアメロゾイトの赤血球侵入時におけるデンスグラニュール分子LSA3の機能解析2019

    • Author(s)
      森田将之、Charlie Jennison、石野智子、Matthew O’Neill, Justin A. Boddey、高島英造、坪井敬文
    • Organizer
      第88回日本寄生虫学会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 赤血球侵入イメージングによるマラリアワクチン候補LSA3の機能解析2018

    • Author(s)
      森田将之、Charlie Jennison、石野智子、Justin A. Boddey、高島英造、坪井敬文
    • Organizer
      第26回分子寄生虫学ワークショップ/第16回分子寄生虫・マラリアフォーラム合同大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2021-02-19  

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