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Why polymorphism and spread of resistance genes in drug-resistant Plasmodium falciparum occur in specific regions

Research Project

Project/Area Number 17H04513
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Area studies
Research InstitutionFujita Health University

Principal Investigator

Maeno Yoshimasa  藤田医科大学, 医学部, 客員准教授 (70131191)

Co-Investigator(Kenkyū-buntansha) 益田 岳  京都大学, 東南アジア地域研究研究所, 連携助教 (00455916)
高木 秀和  愛知医科大学, 医学部, 講師 (90288522)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords熱帯熱マラリア / 薬剤耐性 / 住民 / 媒介蚊 / 疫学調査 / 分子生物学 / ベトナム / 分子生物学的疫学調査 / 地域特性 / 東南アジア
Outline of Final Research Achievements

We analyzed the mutation of K13 gene, which is identified as the gene responsible for resistance to artemisinin in Binh Phuoc province, as an index.
As a result, all strains were wild strains in the early stage of artemisinin use. The positive rate of mutant strains and the number of different types of mutation sites increased depending on the use. However, in the latest survey, they all decreased. The number of allele types of the gametocyte related specific mRNA gene, which is important for malaria parasites transmission, was also reduced. It was suggested that these were derived from the characteristics of the local environment such as the lifestyle of people as well as the protozoa. Moreover, these phenomena differed depending on the region.

Academic Significance and Societal Importance of the Research Achievements

本調査の主目的としてベトナム南部地域における薬剤耐性熱帯熱マラリアの現況の解析を行ったばかりでなく、基盤調査として実施したヒトおよびサルマラリア原虫の感染状況を明らかにした。得られた結果は、ベトナム南部ばかりでなく大メコン圏の一地域における実態を明かにした。基盤調査における媒介蚊の調査では、サルマラリアとヒトマラリアの混合感染が証明され、新しい人獣共通感染性サルマラリアの可能性が新知見として挙げられた。また、薬剤耐性熱帯熱マラリアの耐性関連遺伝子の変化を見出したことにより、新しい治療方針策定のための基盤資料となった。これらの基盤資料はベトナムにおけるマラリア対策の指針となると思われる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (10 results)

All 2019 2018 2017 Other

All Int'l Joint Research (4 results) Journal Article (6 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 6 results,  Open Access: 5 results)

  • [Int'l Joint Research] NIMPE, Hanoi(ベトナム)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] 国立マラリア学、寄生虫学、昆虫学研究所(ベトナム)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] 国立マラリア学、寄生虫学、昆虫学研究所国立/ダナン大学/クワンチ省保健局(ベトナム)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] サバンナケット省保健局(ラオス)

    • Related Report
      2017 Annual Research Report
  • [Journal Article] Prevalence of human and non-human primate Plasmodium parasites in anopheline mosquitoes: A cross-sectional epidemiological study in southern Vietnam2019

    • Author(s)
      Vu Duc Chinh , Gaku Masuda , Vu Viet Hung , Hidekazu Takagi , Satoru Kawai , Takeshi Annoura , Yoshimasa Maeno
    • Journal Title

      Trop Med Health.

      Volume: 47.9 Issue: 1 Pages: 1-6

    • DOI

      10.1186/s41182-019-0139-8

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Malaria vector and Plasmodium infection in mosquitoes in endemic areas of Gia Lai and Khanh Hoa provinces, Vietnam.2018

    • Author(s)
      Chinh VD, Hung VV, Binh NTH, Hanh TV, Maeno Y, Nakazawa S.
    • Journal Title

      Vietnam J Infct Dis

      Volume: 3 Pages: 83-91

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Human infection with Plasmodium knowlesi on the Laos-Vietnam border2018

    • Author(s)
      Pongvongsa Tiengkham、Culleton Richard、Ha Hoang、Thanh Le、Phongmany Panom、Marchand Ron P.、Kawai Satoru、Moji Kazuhiko、Nakazawa Shusuke、Maeno Yoshimasa
    • Journal Title

      Tropical Medicine and Health

      Volume: 46 Issue: 1 Pages: 33-33

    • DOI

      10.1186/s41182-018-0116-7

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Molecular epidemiology of mosquitoes for the transmission of forest malaria in south-central Vietnam2017

    • Author(s)
      Maeno Y
    • Journal Title

      Trop Med Health.

      Volume: 45 Issue: 1 Pages: 27-27

    • DOI

      10.1186/s41182-017-0065-6

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detection of the Plasmodium falciparum Kelch-13 gene P553L mutation in sporozoites isolated from mosquito salivary glands in South-Central Vietnam2017

    • Author(s)
      Maeno Y, Quang NT, Culleton R, Kawai S, Masuda G, Hori K, Nakazawa S, Marchand RP
    • Journal Title

      Parasit Vectors

      Volume: 10(1) Issue: 1 Pages: 308-308

    • DOI

      10.1186/s13071-017-2247-9

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Plasmodium knowlesi and human malaria parasites in Khan Phu, Vietnam: Gametocyte production in humans and frequent co-infection of mosquitoes.2017

    • Author(s)
      Maeno Y, Culleton R, Quang NT, Kawai S, Marchand RP, NakazawaS
    • Journal Title

      Parasitology

      Volume: 144 Issue: 4 Pages: 527-535

    • DOI

      10.1017/s0031182016002110

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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