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A novel strategy by PARP inhibitors for sporadic breast cancers

Research Project

Project/Area Number 20K07686
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 50020:Tumor diagnostics and therapeutics-related
Research InstitutionKindai University (2022-2023)
Fujita Health University (2020-2021)

Principal Investigator

Kuwahara Kazuhiko  近畿大学, 大学病院, 講師 (10263469)

Co-Investigator(Kenkyū-buntansha) 酒井 康弘  浜松医科大学, 医学部, 准教授 (20754394)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords乳癌 / 転写共役型DNA傷害 / 非遺伝性散発性乳癌 / BRCA2 / PARP阻害剤 / 転写共役型DNA傷害 / 非遺伝性乳癌 / BRCA
Outline of Research at the Start

PARP阻害剤オラパリブは現在抗がん治療に適応されており、合成致死の原理に基づきBRCA1/2変異を有する乳癌や卵巣癌の維持療法で有効性が認められている。しかしBRCA変異は全乳癌患者の約5%のみでみられ、大部分の非遺伝性散発性乳癌では治療効果が得られない。申請者らはマウスモデル、ヒト臨床検体を組み合わせた複合的解析から非遺伝性散発性乳癌の疾患感受性遺伝子としてganpを同定し、GANPがBRCA2のタンパク発現を制御することを明らかにした。本研究ではGANP発現低下によるBRCAness誘導に至る分子機構を利用し、BRCA変異の有無に依らないPARP阻害剤による新規乳癌治療戦略を提示する。

Outline of Final Research Achievements

Inhibitors of poly (ADP-ribose) polymerase (PARP) have emerged as a new class of anti-cancer drugs, specifically for malignancies bearing aberrations of the homologous recombination pathway. They are clinically used in breast, ovarian, and pancreatic cancers. BRCA mutations are observed only in 5% among the patients with breast cancers; therefore, PARP inhibitors are ineffective to most of the patients with non-hereditary sporadic breast cancers. We found that PARP inhibitors could suppress the proliferation of breast cancer cells after ganp knockdown. In breast cancer cells, we demonstrate a novel strategy by PARP inhibitors through BRCAness induced by GANP-deficiency.

Academic Significance and Societal Importance of the Research Achievements

乳癌発症には女性ホルモンの長期暴露、欧米型の生活習慣などが危険因子となるが、95%を占める非遺伝性散発性乳癌ではその原因には不明な点が多い。家族性乳癌の原因遺伝子BRCA1とBRCA2の解析から両者がDNA修復に関与することが示され、乳癌が「DNA修復機構の異常による疾患」であることが明らかにされた。我々は転写共役型DNA傷害の制御に関わる分子GANPの機能不全と非遺伝性散発性乳癌発症に着目し、GANPの標的分子の一つがBRCA2であることを見出した。GANPを強制的に発現低下させることでBRCA2を抑制でき、PARP阻害剤の適応を非遺伝性散発性乳癌にまで拡げることが可能となる。

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

    (19 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (5 results) Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (8 results)

  • [Int'l Joint Research] Universitas Padjadjaran(インドネシア)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Universitas Padjadjaran(インドネシア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Naresuan University(タイ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Florida(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Naresuan University(タイ)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Testicular teratomagenesis from primordial germ cells with overexpression of germinal center-associated nuclear protein2023

    • Author(s)
      Yasuhiro Sakai, Kazuya Yoshinaga, Ayaka Yoshida, Andri Rezano, Kazuya Shiogama, Yoshiaki Kawashima, Tadashi Yoshizawa, Akihiko Yoshizawa, Shingo Hatakeyama, Chikara Ohyama, Hiroyasu Ito, Masato Abe, Hiroshi Kijima, Yoshiro Otsuki, Akihiko Ito, Toyonori Tsuzuki, Motohiro Takeya, Nobuo Sakaguchi & Kazuhiko Kuwahara
    • Journal Title

      Cancer Science

      Volume: 114 Issue: 4 Pages: 1729-1739

    • DOI

      10.1111/cas.15685

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] DNA Damage, DNA Repair, and Cancer: Second Edition2023

    • Author(s)
      Kuwahara Kazuhiko
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 24 Issue: 23 Pages: 16835-16835

    • DOI

      10.3390/ijms242316835

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Histology of Cardiac Sarcoidosis with novel considerations arranged upon a pathologic basis2022

    • Author(s)
      Shu Kato, Yasuhiro Sakai, Asako Okabe, Yoshiaki Kawashima, Kazuhiko Kuwahara, Kazuya Shiogama, Masato Abe, Hiroyasu Ito & Shin'ichiro Morimoto
    • Journal Title

      Journal of Clinical Medicine

      Volume: 11 Issue: 1 Pages: 251-251

    • DOI

      10.3390/jcm11010251

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Increased chemosensitivity via BRCA2-independent DNA damage in DSS1- and PCID2-depleted breast carcinomas2021

    • Author(s)
      Gondo Naomi、Sakai Yasuhiro、Zhang Zhenhuan、Hato Yukari、Kuzushima Kiyotaka、Phimsen Suchada、Kawashima Yoshiaki、Kuroda Makoto、Suzuki Motoshi、Okada Seiji、Iwata Hiroji、Toyama Tatsuya、Rezano Andri、Kuwahara Kazuhiko
    • Journal Title

      Laboratory Investigation

      Volume: 101 Issue: 8 Pages: 1048-1059

    • DOI

      10.1038/s41374-021-00613-6

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] GANP: An Immunoactive Protein with a Key Role in Tumourigenesis2020

    • Author(s)
      Yasuhiro Sakai & Kazuhiko Kuwahara
    • Journal Title

      Scientia

      Volume: - Pages: 1-5

    • DOI

      10.33548/scientia592

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Journal Article] The critical role of germinal center-associated nuclear protein in cell biology, immunohematology, and hematolymphoid oncogenesis2020

    • Author(s)
      Yasuhiro Sakai, Suchada Phimsen, Seiji Okada & Kazuhiko Kuwahara
    • Journal Title

      Experimental Hematology

      Volume: 90 Pages: 30-38

    • DOI

      10.1016/j.exphem.2020.08.007

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] GANP過剰発現に起因する精巣奇形腫発症とその病理学的意義2023

    • Author(s)
      桑原一彦、酒井康弘、伊藤彰彦
    • Organizer
      第112回日本病理学会総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Testicular teratomagenesis with overexpression of GANP2023

    • Author(s)
      Kazuhiko Kuwahara and Akihiko Ito
    • Organizer
      第82回日本癌学会学術総会
    • Related Report
      2023 Annual Research Report
  • [Presentation] DSS1, an anti-cancer therapeutic target, and the mechanism of chemoresistance in breast cancers2022

    • Author(s)
      Kazuhiko Kuwahara & Yasuhiro Sakai
    • Organizer
      第111回日本病理学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] Decrease of BRCA2-interacting DSS1 contributes to reducing the side effects of chemotherapy in breast carcinomas2022

    • Author(s)
      Kazuhiko Kuwahara & Akihiko Ito
    • Organizer
      第81回日本癌学会総会
    • Related Report
      2022 Research-status Report
  • [Presentation] ヒト腫瘍発症及び悪性進展における転写共役型DNA傷害の病理学的意義 -非遺伝性散発性乳癌の解析からの知見-2022

    • Author(s)
      桑原一彦
    • Organizer
      第68回日本病理学会秋期特別総会
    • Related Report
      2022 Research-status Report
  • [Presentation] 中心体複製制御因子SAC3D1に着目した 非遺伝性乳癌の予後解析2021

    • Author(s)
      加藤秀、酒井康弘、上本康明、鈴木元、遠山竜也、桑原一彦
    • Organizer
      第110回日本病理学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 中心体複製制御因子の乳癌悪性進展における意義2020

    • Author(s)
      桑原一彦、酒井康弘、黒田誠、塚本徹哉
    • Organizer
      第109回日本病理学会総会
    • Related Report
      2020 Research-status Report
  • [Presentation] ヒト精巣胚細胞感受性遺伝子ganpの奇形腫発症における病理学的意義2020

    • Author(s)
      酒井康弘、塚本徹哉、黒田誠、桑原一彦
    • Organizer
      第109回日本病理学会総会
    • Related Report
      2020 Research-status Report

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

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