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Mechanisms of gastric carcinogenesis mediated by the EBV-specific exosome and IFN signaling

Research Project

Project/Area Number 17K09360
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Gastroenterology
Research InstitutionNational Center for Child Health and Development

Principal Investigator

IWAKIRI DAI  国立研究開発法人国立成育医療研究センター, 高度先進医療研究室, リサーチアソシエイト (10307853)

Co-Investigator(Kenkyū-buntansha) 今留 謙一  国立研究開発法人国立成育医療研究センター, 高度感染症診断部, 部長 (70392488)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsEBV / EBER / 胃がん / エクソソーム / インターフェロン / IRF / 胃癌 / EBウイルス
Outline of Final Research Achievements

We demonstrated that EBV-encoded small RNA (EBER) is released by EBV-infected gastric cancer (GC) cells through the exosome secretion and exosomal transfer of EBER triggers the signaling from toll-like receptor 3 in the recipient cells. EBER-mediated activation of TLR3 signals led to the growth promotion of EBV-infected GC cells. Further study revealed that EBV-dependent regulation of interferon (IFN) signaling induced by exosomes contributes to the growth promotion of EBV-infected GC cells, suggesting that EBV-specific IFN signaling contributes to gastric carcinogenesis.

Academic Significance and Societal Importance of the Research Achievements

我々は、我が国の胃がんの約1割を占めるEBウイルス陽性胃がんの発生メカニズムについての研究をおこなっている。これまでの研究により、EBウイルスの小RNAであるEBERが、宿主の免疫機構を巧みに調節し、細胞を悪性化へと導くことでがんの発生に寄与していることが明らかになり、EBウイルス陽性胃がんの新たな治療法の開発へとつながることが期待される知見が得られることとなった。

Report

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

    (1 results)

All 2018

All Presentation (1 results) (of which Invited: 1 results)

  • [Presentation] ウイルスとがん2018

    • Author(s)
      岩切 大
    • Organizer
      九段生涯健康塾セミナー
    • Related Report
      2017 Research-status Report
    • Invited

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

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