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The Significance of ctDNA as a Predictor of Recurrence in Surgical Resection Cases Using Next-Generation Sequencing

Research Project

Project/Area Number 20K17764
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 55040:Respiratory surgery-related
Research InstitutionKindai University

Principal Investigator

Ohara Shuta  近畿大学, 大学病院, 助教 (20813926)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordscirculating tumor DNA / liquid biopsy / reccurence / surgery / lung cancer / Signatera / CAPP-Seq / NSCLC / Circurating tumor DNA / 肺癌 / 手術 / 再発 / 予後因子 / recurrence / next-generation sequence
Outline of Research at the Start

手術可能な肺がん患者は最も治癒の可能性が高いにも関わらず、その治療成績は満足すべきものではない。これは臨床的に検出できない微小な残存病巣が存在しているにも関わらず、それに対して有効な治療が行われていないことに起因する。手術可能な肺がん患者において循環血漿中のDNAの癌関連遺伝子異常が微小残存病巣のマーカーとなるかを検討する。臨床病期II期以上の患者70例の内、再発した20例に対し、次世代シーケンサーで解析をおこない、変異遺伝子コピー数の変化と手術、術後アジュバント治療、再発までの時間経過との関係を検討する。この結果に基づき前向きな術後補助療法の臨床試験を立案することを念頭においている。

Outline of Final Research Achievements

In this study, we used CAPP-Seq and Signatera to evaluate the relationship between postoperative prognostic and ctDNA status and recurrence on imaging studies.
In a landmark analysis (median 9 days postoperatively, range 2-53 days), 5 patients tested positive for ctDNA and all recurred, with ctDNA positivity associated with a significantly worse prognosis. Five more patients tested positive for ctDNA during follow-up, and all relapsed. The prognosis was significantly worse if ctDNA was detected at least once during follow-up. Overall, the median lead time for ctDNA-positive imaging was 2.8 (0-12.8) months. ctDNA negativity was associated with a favorable outcome, with a long-term negative predictive value of 83.3% (30/36 patients).

Academic Significance and Societal Importance of the Research Achievements

腫瘍残存病変を検出するためのcirculating tumor DNA(ctDNA)のモニタリングは、様々ながん種において再発予測や薬物療法の個別化などの面でその有用性が示されている。しかし、非小細胞肺がんにおけるその有効性については、十分なデータはない。本研究ではCAPP-SeqやSignateraを用いて術後の予後予測やctDNAの状態と画像検査における再発の関係を評価し,術後の採血ポイントを術後早期だけでなく、6か月毎におこなうことで、術後の予後予測だけでなく、術後再発の早期発見にctDNA解析が有用であることが示された。

Report

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

    (8 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (4 results) (of which Invited: 1 results)

  • [Journal Article] Dose-dependence in acquisition of drug tolerant phenotype and high RYK expression as a mechanism of osimertinib tolerance in lung cancer2021

    • Author(s)
      Ohara S, Suda K, Fujino T, Hamada A, Koga T, Nishino M, Chiba M, Shimoji M, Takemoto T, Soh J, Mitsudomi T
    • Journal Title

      Lung Cancer

      Volume: 154 Pages: 84-91

    • DOI

      10.1016/j.lungcan.2021.02.017

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cell Line Models for Acquired Resistance to First-Line Osimertinib in Lung Cancers-Applications and Limitations2021

    • Author(s)
      Ohara S, Suda K, Mitsudomi T
    • Journal Title

      Cells

      Volume: 10 Issue: 2 Pages: 354-354

    • DOI

      10.3390/cells10020354

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Prognostic implications of preoperative versus postoperative circulating tumor DNA in surgically resected lung cancer patients: a pilot study2020

    • Author(s)
      Shuta Ohara, Kenichi Suda, Kazuko Sakai, Masaya Nishino, Masato Chiba, Masaki Shimoji, Toshiki Takemoto, Toshio Fujino,Takamasa Koga, Akira Hamada, Junichi Soh, Kazuto Nishio, Tetsuya Mitsudomi
    • Journal Title

      Translational Lung Cancer Research

      Volume: 9 Issue: 5 Pages: 1915-1923

    • DOI

      10.21037/tlcr-20-505

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prognostic value of plasma fibrinogen and D-dimer levels in patients with surgically resected non-small cell lung cancer2020

    • Author(s)
      Ohara S, Suda K, Tomizawa K, Takemoto T, Fujino T, Hamada A, Koga T, Nishino M, Chiba M, Sato K, Shimoji M, Soh J, Mitsudomi T
    • Journal Title

      Surgery Today

      Volume: 50 Issue: 11 Pages: 1427-1433

    • DOI

      10.1007/s00595-020-02019-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 肺癌術後におけるcirculating tumor DNA検出の意義2022

    • Author(s)
      小原秀太 須田健一  福田祥大 濵田 顕  千葉眞人   下治正樹  武本智樹  宗 淳一  津谷康大 光冨徹哉
    • Organizer
      第39回日本呼吸器外科学会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 肺癌切除症例におけるctDNA解析の有用性2021

    • Author(s)
      小原秀太,須田健一,藤野智大,濱田顕,千葉眞人,下治正樹,武本智樹,宗淳一, 光冨徹哉
    • Organizer
      第72回日本気管食道科学会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Next-generation sequencing(NGS)を用いた外科切除症例における再発予測因子としての意義2020

    • Author(s)
      小原秀太,須田健一,坂井和子,藤野智大,古賀教将,西野将矢,濱田顕,千葉眞人,武本智樹,宗淳一, 西尾和人,光冨徹哉
    • Organizer
      日本肺癌学会 関西支部会
    • Related Report
      2020 Research-status Report
  • [Presentation] Next-generation sequencing(NGS)を用いたctDNAの外科切除症例における再発予測因子としての意義2020

    • Author(s)
      小原秀太,須田健一,坂井和子,藤野智大,古賀教将,西野将矢,濱田顕,千葉眞人,武本智樹,宗淳一, 西尾和人,光冨徹哉
    • Organizer
      第4回Liquid Biopsy研究会
    • Related Report
      2020 Research-status Report

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

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