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2021 Fiscal Year Final Research Report

Elucidation of the mechanism how rare sugars inhibit growth and development of malaria parasites only in the mosquito vector

Research Project

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Project/Area Number 19K07522
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49040:Parasitology-related
Research InstitutionKagawa University

Principal Investigator

Arai Meiji  香川大学, 医学部, 准教授 (30294432)

Project Period (FY) 2019-04-01 – 2022-03-31
Keywordsマラリア / ハマダラカ / 伝播阻止 / 希少糖 / D-アロース / ヘキソース・トランスポーター
Outline of Final Research Achievements

In order to confirm whether D-allose is metabolized to D-allose 6-phosphate (A6P) in the body of Anopheles mosquito, we performed HPLC analysis on the homogenate of mosquitoes which had been fed on D-allose. As a result, A6P was not detected, denying the hypothesis that A6P produced in the mosquito’s body might be the true effector for transmission-blocking. We also expressed the hexose transporter of Plasmodium berghei (PbHT) in the oocytes of Xenopus laevis. We expect that showing the inhibition of PbHT activity by D-allose in an in vitro experiment will lead to the elucidation of the mechanism of action for transmission-blocking.

Free Research Field

寄生虫学

Academic Significance and Societal Importance of the Research Achievements

マラリア原虫の糖代謝経路を標的とした薬剤標的探索研究は盛んに行われているが、実用化には至っていない。我々は食品として市販されている希少糖含有シロップが十分なマラリア伝播阻止効果を示すことを確認しており、コストと安全性の両面で実用化に近い段階にある。本研究で得られた成果は、希少糖をベースとしたマラリア伝播阻止エサ(Transmission-blocking antimalarial rare sugar bait)実用化のための理論的基盤を提供するとともに、マラリア原虫の糖代謝系への干渉に基づく新規抗マラリア薬の開発に道を開くものである。

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Published: 2023-01-30  

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