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Tumorigenesis by transcriptional suppression of Breast cancer 2, early onset (BRCA2) by ANXA2

Research Project

Project/Area Number 20K06417
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 42020:Veterinary medical science-related
Research InstitutionKitasato University

Principal Investigator

Yoshikawa Yasunaga  北里大学, 獣医学部, 准教授 (00552043)

Co-Investigator(Kenkyū-buntansha) 佐々木 宣哉  北里大学, 獣医学部, 教授 (20302614)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsANXA2 / BRCA2 / 転写 / プロモーター活性 / 乳腺腫瘍 / DNA損傷修復 / 発現抑制 / 発現調節 / サイレンサー / 発現制御 / 腫瘍
Outline of Research at the Start

雌イヌにおいて乳腺腫瘍の発症率は著しく高い。その発症要因の一つとして、申請者らは発現量の低下がイヌ乳腺腫瘍やヒト乳癌の発症と関係するBRCA2(Breast cancer 2, early onset)に注目して解析を行う。申請者らはこれまでにBRCA2の転写を負に制御する新規遺伝子産物としてANXA2を同定したので、本研究ではANXA2がどの様にBRCA2の発現を調節するのか解明する。

Outline of Final Research Achievements

We have shown that mutations or decreased expression of the tumor suppressor gene BRCA2 is involved in the development of canine mammary gland tumors. While performing these studies, we found that ANXA2 may interact with novel BRCA2 silencer region and be involved in the BRCA2 transcriptional suppression mechanism. This study aimed to elucidate the possibility that BRCA2 was suppressed by ANXA2. The ANXA2 knockout HeLa cells showed increased sensitivity against the BRCA2-related DNA-damaging agents. However, reduced ANXA2 protein level was not influenced the BRCA2 protein expression. Therefore, we expected that ANXA2 itself contributes to DNA damage repair and performed functional analysis of ANXA2. However, we could not demonstrate how ANXA2 contributes to DNA damage repair in this study. Further analyses are required to reveal the function of ANXA2 in DNA damage repair.

Academic Significance and Societal Importance of the Research Achievements

本研究課題では、ANXA2がどの様にDNA損傷修復に関与するかを解明する事はできなかったが、ANXA2をノックアウトするとBRCA2が関わるDNA損傷剤に対して高感受性になる事が分かった。この結果は、多機能タンパク質であるANXA2の新たな機能を見出す手がかりになると考えられる。また、ANXA2が抗癌治療のターゲットになる可能性を示唆している。

Report

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

    (10 results)

All 2023 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (6 results)

  • [Journal Article] A Highly Conserved Region in BRCA2 Suppresses the RAD51-Interaction Activity of BRC Repeats2023

    • Author(s)
      Zhu Zida、Kitano Taisuke、Morimatsu Masami、Ochiai Kazuhiko、Ishiguro-Oonuma Toshina、Oosumi Kosuke、Lin Xianghui、Orino Koichi、Yoshikawa Yasunaga
    • Journal Title

      Veterinary Sciences

      Volume: 10 Issue: 2 Pages: 145-145

    • DOI

      10.3390/vetsci10020145

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] BRCA2 C-Terminal RAD51-Binding Domain Confers Resistance to DNA-Damaging Agents2022

    • Author(s)
      Zhu Zida、Kitano Taisuke、Morimatsu Masami、Tanaka Arisa、Morioka Ryo、Lin Xianghui、Orino Koichi、Yoshikawa Yasunaga
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 23 Issue: 7 Pages: 4060-4060

    • DOI

      10.3390/ijms23074060

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reduced translation efficiency due to novel splicing variants in 5′ untranslated region and identification of novel cis-regulatory elements in canine and human BRCA22021

    • Author(s)
      Yoshikawa Yasunaga、Kozuma Hajime、Morimatsu Masami、Sugawara Kaori、Orino Koichi
    • Journal Title

      BMC Molecular and Cell Biology

      Volume: 22 Issue: 1 Pages: 2-2

    • DOI

      10.1186/s12860-020-00336-4

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of the core motif of the BRCA2 C-terminal RAD51-binding domain by comparing canine and human BRCA22021

    • Author(s)
      YOSHIKAWA Yasunaga、MORIMATSU Masami、OCHIAI Kazuhiko、ISHIGURO-OONUMA Toshina、MORIOKA Ryo、OKUDA Kento、ORINO Koichi
    • Journal Title

      Journal of Veterinary Medical Science

      Volume: 83 Issue: 5 Pages: 759-766

    • DOI

      10.1292/jvms.21-0006

    • NAID

      130008036476

    • ISSN
      0916-7250, 1347-7439
    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ネズミマラリア原虫Plasmodium bergheiにおける相同組換えタンパク質Brca2機能解析2022

    • Author(s)
      吉川泰永、木村俊太、曽賀晃、杉山真言、朱子達、中山和彦、草木迫浩大、北野泰佑、折野宏一、福本晋也、筏井宏実
    • Organizer
      第91回日本寄生虫学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ANXA2がイヌ血管肉腫細胞の遊走能に及ぼす影響2022

    • Author(s)
      林香慧, 北野泰佑, 落合和彦, 酒井洋樹, 折野宏一, 吉川泰永
    • Organizer
      第165回日本獣医学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Plasmodium berghei(ネズミマラリア原虫)における減数分裂関連タンパク質Brca2の機能解析2022

    • Author(s)
      木村駿太, 吉川泰永, 曽賀晃, 杉山真言, 朱子達, 中山和彦, 草木迫浩大, 北野泰祐, 折野宏一, 福本晋也, 筏井宏実
    • Organizer
      第165回日本獣医学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] BRCA2 C-terminal RAD51-binding domain confers resistance to DNA-damaging agents2022

    • Author(s)
      朱子達、北野泰佑、森松正美、折野宏一、吉川泰永
    • Organizer
      第165回日本獣医学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 癌抑制遺伝子Brca2のイントロン 1 における発現調節機構の解析2021

    • Author(s)
      上妻 創、吉川 泰永、森松 正美、落合 和彦、折野 宏一
    • Organizer
      第164回日本獣医学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 癌抑制遺伝子BRCA2の翻訳効率に影響を与えるスプライシングバリアント2020

    • Author(s)
      吉川泰永、森松正美、上妻創、折野宏一
    • Organizer
      第163回日本獣医学会学術集会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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