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Mechanism of TLR9-mediated intrahepatic cholangiocarcinogenesis by Helicobacter sp. infection

Research Project

Project/Area Number 17K10703
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Digestive surgery
Research InstitutionNagasaki University

Principal Investigator

Adachi Tomohiko  長崎大学, 医歯薬学総合研究科(医学系), 講師 (60437879)

Co-Investigator(Kenkyū-buntansha) 小坂 太一郎  長崎大学, 病院(医学系), 助教 (00437881)
江口 晋  長崎大学, 医歯薬学総合研究科(医学系), 教授 (80404218)
大野 慎一郎  長崎大学, 病院(医学系), 助教 (90567174)
Project Period (FY) 2017-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywordsヘリコバクタービリス / 胆道発癌 / Helicobacter bilis / 肝内胆管癌
Outline of Final Research Achievements

In this study, we investigated the mechanism of biliary carcinogenesis with H. bilis.
Methods: H.bilis was co-cultured with purchased immortalized human bile duct epithelial cells (MMNK-1) under various conditions, and cell-derived inflammatory cytokines, reactive oxygen species, and cell proliferation activity were detected by ELISA, fluorescence, and WST-1 assay, respectively, and compared with those of the non-cultured group. The results showed that even in short-term co-culture of MMNK-1 and H. bilis, there was an increase in secretion of IL-6, IL-8, and reactive oxygen species that can convert cells to malignant and invasive forms.

Academic Significance and Societal Importance of the Research Achievements

ヘリコバクタービリスと胆道発癌ではPCRを用いた検討では関連性が示唆されるものの、菌体自体が明瞭に確認できることが少なく、今回の検討にて、胆道上皮と菌体との接触で何らかのreactionが生じていることは認識し得たので、今後の検討につながるものと考える。胆道癌は予後不良の疾患である。胃癌においては、ヘリコバクターピロリとの関連が明白となった以降、除菌にて明らかな有病率の低下に繋がった。胆道癌において最たる抗癌治療は発癌抑制であり、今後ヘリコバクタービリスと胆道発癌の関連がより明らかとなり、かつ除菌での発癌抑制へ向けての基礎研究結果となれば、今回の研究の社会的意義は高いと思われる。

Report

(7 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (3 results)

All 2022 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (2 results)

  • [Journal Article] Helicobacter bilis infection induces oxidative stress in and enhances the proliferation of human cholangiocytes2022

    • Author(s)
      Yamashita Mampei、Adachi Tomohiko、Ono Shinichiro、Yoshino Kyohei、Imamura Hajime、Matsushima Hajime、Tanaka Takayuki、Kosaka Taichiro、Soyama Akihiko、Hidaka Masaaki、Kanetaka Kengo、Eguchi Susumu
    • Journal Title

      Helicobacter

      Volume: 27 Issue: 4

    • DOI

      10.1111/hel.12908

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Helicobacter bilisが関与する胆道発癌の機序解明2019

    • Author(s)
      山下万平、足立智彦、大野慎一郎、松村尚美、夏田孔史、日高匡章、金高賢悟、高槻光寿、江口晋
    • Organizer
      第119回日本外科学会定期学術集会
    • Related Report
      2019 Research-status Report
  • [Presentation] Helicobacter bilisが関与する胆道発癌の機序解明2019

    • Author(s)
      山下万平、足立智彦、大野慎一郎、松村尚美、夏田孔史、日高匡章、金高賢悟、高槻光寿、江口 晋
    • Organizer
      第119回日本外科学会
    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2024-01-30  

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