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Molecular mechanisms of HBV replication and liver cancer malignant progression by a novel lncRNA ELIT-1

Research Project

Project/Area Number 20K07569
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionHamamatsu University School of Medicine

Principal Investigator

Sakai Satoshi  浜松医科大学, 医学部, 助教 (50566081)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordslncRNA / がん遺伝子 / がん抑制遺伝子 / シグナル伝達 / 肝がん悪性化 / HBV複製 / HBV / 肝線維化 / 肝がん / TGFβ
Outline of Research at the Start

ELIT-1はTGFβで誘導され、Smad3と結合して標的遺伝子の転写を促進して上皮間葉転換(EMT)の誘導に機能することを見出した。また、ELIT-1はB型肝炎ウイルス(HBV)複製時にも発現亢進した。本研究ではELIT-1がどのような分子機構でHBVによって誘導され、HBVの複製を促進しているのかを明らかにする。ELIT-1はHBVの複製、肝線維化、肝がんの悪性化への深い関与が予想され、ELIT-1を分子標的とした新しいHBV関連疾患治療薬の創生を目指す。

Outline of Final Research Achievements

The aim of our study was to analyse the function of lncRNA ELIT-1 in HBV replication. However, knockdown of ELIT-1 or compounds obtained by screening for inhibitors of ELIT-1 expression did not affect in a significant reduction of hepatitis B virus.
On the other hand, we focused on lincNMR as another lncRNA whose expression is upregulated during HBV replication. We reported that lincNMR is an oncogene that positively regulates APOBEC3B, which is involved in DNA mutations (Carcinogenesis, 2023). Furthermore, we reported that LINC00173, a reported tumor suppressor, bound to SNAIL and inhibited the down-regulation of the tumor suppressor FHIT by SNAIL (Int. J. Mol. Sci., 2023).

Academic Significance and Societal Importance of the Research Achievements

ELIT-1の発現阻害剤のスクリーニングから得た化合物はB型肝炎ウイルス量の顕著な低下を示さなかった。しかし、ELIT-1は上皮間葉転換(EMT)を促進する機能を持っている(Sakai et al., Cancer Res., 2019)。本成果で得られた化合物は、がんの転移阻害剤、肝線維化阻害剤として有用となる可能性がある。また、HBV複製時に発現上昇したlincNMRが、がんの悪性化に関わることも発見できた。今後lincNMRの発現阻害剤を探索することで、HBVを起点とする肝がんの進展阻害剤を見出すことが出来る可能性がある。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2023 2022

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Expression of tumor suppressor FHIT is regulated by the LINC00173-SNAIL axis in human lung adenocarcinoma.2023

    • Author(s)
      Suzuki T, Sakai S, Kitagawa M. et al.
    • Journal Title

      Int. J. Mol. Sci.

      Volume: 24 Issue: 23 Pages: 17011-17011

    • DOI

      10.3390/ijms242317011

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] APOBEC3B expression is promoted by lincNMR collaborating with TGF-β-Smad pathway2022

    • Author(s)
      Ota K, Sakai S, Ohhata T, Suzuki T, Uchida C, Niida H, Kitagawa M.
    • Journal Title

      Carcinogenesis .

      Volume: bgac086 Issue: 1 Pages: 1-14

    • DOI

      10.1093/carcin/bgac086

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] APOBEC3B expression is promoted by lincNMR collaborating with TGFβーSmad pathway2023

    • Author(s)
      Satoshi Sakai, Kosuke Ota, Tatsuya Ohhata, Hiroyuki Niida, Masatoshi Kitagawa
    • Organizer
      28th Annual Meeting of the RNA Society
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] TGFβシグナルに寄与するlncRNA2023

    • Author(s)
      酒井 聡、太田 幸佑、鈴木 貴人、大畑 樹也、北川 雅敏
    • Organizer
      第96回 日本生化学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] lncRNA ELIT-2はTGFβ-Smad経路を介して上皮間葉転換(EMT)を促進する2023

    • Author(s)
      酒井 聡、大畑 樹也、丹伊田 浩行、北川 雅敏
    • Organizer
      第46回 分子生物学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] TGFβにより誘導される長鎖ノンコーディングRNAの網羅的解析とその機能2022

    • Author(s)
      酒井 聡、太田 幸佑、大畑 樹也、北川 雅敏
    • Organizer
      第95回 日本生化学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] lincNMRはTGF-β-Smad pathwayを介してAPOBEC3Bの発現を促進する2022

    • Author(s)
      太田 幸佑、酒井 聡、大畑 樹也、北川 雅敏
    • Organizer
      第45回 日本分子生物学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Comprehensive analysis of long non-coding RNAs induced by TGFβ and their functional analysis2022

    • Author(s)
      Satoshi Sakai, Kosuke Ota, Tatsuya Ohhata, Hiroyuki Niida, Masatoshi Kitagawa
    • Organizer
      2022 Cold Spring Harbor Asia Conference (RNA BIOLOGY)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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