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Analysis of RNAi mechanism by feeding in insects

Research Project

Project/Area Number 16K07632
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Plant protection science
Research InstitutionNational Agriculture and Food Research Organization

Principal Investigator

TANAKA Yoshiaki  国立研究開発法人農業・食品産業技術総合研究機構, 生物機能利用研究部門, 主席研究員 (90355735)

Co-Investigator(Kenkyū-buntansha) 霜田 政美  国立研究開発法人農業・食品産業技術総合研究機構, 生物機能利用研究部門, ユニット長 (80344000)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsトビイロウンカ / アザミウマ / 神経ペプチド / RNAi / 農薬 / GPCR / small ORF / 脱皮 / RNA農薬 / 昆虫 / 遺伝子 / 発現制御 / シグナル伝達 / バイオテクノロジー / RNA干渉
Outline of Final Research Achievements

1. We identified the neuropeptide-receptor genes inducing mortality by feeding RNAi in the brown planthopper Nilaparvata lugens and the thrips Frankliniella occidentalis. Application of dsRNA for neuropeptide receptor gene alone induced weak mortality in F. occidentalis, but the mortality increased by adding the dsRNAs for genes that are speculated to inhibit the transfection or delivery of dsRNAs. These results provide the basic data for the exploration of RNAi pesticides for sucking pests.
2. The neuropeptide elevenin has not been explored except in C. elegans, but we found that RNAi of elevenin and its receptor NlA42 induced dark-body color in N. lugens. These results suggest that neuropeptide elevenin is involved in the regulation of melanization through its receptor NlA42. This is the first report of a physiological function for elevenin-like peptides in insects.

Academic Significance and Societal Importance of the Research Achievements

RNA干渉は薬剤抵抗性の打破に有望な技術であるが、二本鎖RNAを食べさせて害虫に投与した場合の効果の低さ、特に吸汁性害虫では葉の表面に二本鎖RNAを散布してもほどんど虫体内に摂取されないことから、防除への応用が困難とされてきた。しかし、本課題では、アザミウマ類は葉の表面に散布してもRNA干渉が効くこと、さらに二本鎖RNAの取込みや輸送を阻害する遺伝子を抑制することでRNA干渉の効果を増幅できることが明らかになった。これらの結果は、薬剤抵抗性が問題となっているアザミウマ類の防除にRNA干渉が利用可能であることを示したものとして意義がある。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (5 results)

All 2019 2018 2017 2016

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Elevenin regulates the body color through a G protein-coupled receptor NlA42 in the brown planthopper Nilaparvata lugens2018

    • Author(s)
      Uchiyama Hironobu、Maehara Shiori、Ohta Hiroto、Seki Takehito、Tanaka Yoshiaki
    • Journal Title

      General and Comparative Endocrinology

      Volume: 258 Pages: 33-38

    • DOI

      10.1016/j.ygcen.2017.07.017

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] The mille-pattes/polished rice/tarsal-less (mlpt/pri/tal)-like genes has important role on the development of brown plant hopper Nilaparvata lugens.2019

    • Author(s)
      Yoshiaki TANAKA
    • Organizer
      Invertebrate Neuropeptide Conference 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] トビイロウンカおよびアザミウマ類のfeeding RNAiを阻害する要因の探索2018

    • Author(s)
      田中良明、内山博允、関健仁
    • Organizer
      第62回日本応用動物昆虫学会大会
    • Related Report
      2017 Research-status Report
  • [Presentation] トビイロウンカを用いたRNA農薬開発に有用な標的遺伝子の探索2017

    • Author(s)
      内山博允、関健仁、田中良明
    • Organizer
      第61回日本応用動物昆虫学会大会
    • Place of Presentation
      東京農工大学小金井キャンパス(東京都・小金井市)
    • Year and Date
      2017-03-27
    • Related Report
      2016 Research-status Report
  • [Presentation] A molluscan neuropeptide elevenin regulates the body color via a G protein-coupled receptor Nl-A42 in the brown planthopper Nilaparvata lugens.2016

    • Author(s)
      Hironobu Uchiyama, Shiori Maehara, Hiroto Ohta, Takehito Seki, Yoshiaki Tanaka
    • Organizer
      The 28th Conference of European Comparative Endocrinologists
    • Place of Presentation
      Leuven (ベルギー)
    • Year and Date
      2016-08-21
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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