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Clinico-genomic analysis of Lynch-like syndrome

Research Project

Project/Area Number 21K07187
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 InstitutionTokyo Metropolitan Hospital Organization Tokyo Metropolitan Komagome Hospital

Principal Investigator

Yamaguchi Tatsuro  地方独立行政法人東京都立病院機構東京都立駒込病院(臨床研究室), 遺伝子診療科, 部長 (10538482)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsLynch-like症候群 / 遺伝性腫瘍 / Lynch症候群 / MSI / マイクロサテライト不安定性 / 大腸癌 / MSI大腸癌
Outline of Research at the Start

MSI大腸癌は、術後補助化学療法の適応や免疫チェックポイント阻害剤の適応に利用されており、臨床上重要なマーカーである。MSI大腸癌には、ミスマッチ修復遺伝子の生殖細胞系列の病的バリアントを原因とするリンチ症候群とMLH1遺伝子のプロ モーター領域の異常メチル化を原因とする散発性MSI大腸癌があるが、近年、ミスマッチ修復遺伝子の後天的な異常を起因とするLynch-like症候群が新たなサブタイプとして提唱されている。本研究では、MSI大腸癌のサブタイプについて臨床病理学的因子やそれぞれのゲノム異常について検討する。

Outline of Final Research Achievements

In total, 2634 consecutive patients with CRC were enrolled between 2008 and 2019.
UTS of the cohort found 146 patients with MSI CRC (5.5%). Of these, excluding sporadic MSI CRC, 30 (1.1%) had a diagnosis of LS, and 19 (0.7%) had no germline pathogenic variants of the MMR gene. The CRC type in the latter group was identified as LLS. LLS occurred significantly more often in young patients, was left-sided, involved a KRAS variant and BRAF wild-type, and had a higher concordance rate with the Revised Bethesda Guidelines than sporadic MSI CRC. No significant differences were observed in terms of the clinicopathological factors between LLS and LS-associated MSI CRC; however, LLS had a lower frequency of LS-related neoplasms compared with LS.
In conclusion, distinguishing clinically between LS and LLS was challenging, but the incidence of neoplasms was higher in LS than in LLS, suggesting the need for different screening and surveillance methods for the two subtypes.

Academic Significance and Societal Importance of the Research Achievements

本研究は、Lynch症候群および散発性MSI大腸癌と比較し、Lynch-like症候群の臨床的特徴を明らかにした。その結果、Lynch-like症候群の患者はLynch症候群や散発性MSI大腸癌とは異なるサーベイランス方法が必要であることが明らかとなった。
現在、Lynch症候群診断のための遺伝学的検査は保険適用外であるが、Lynch-like症候群とLynch症候群の鑑別は遺伝学的検査によってのみ行われる。したがって、Lynch症候群診断のための遺伝学的検査は診断・サーベイランスの観点から必要であると考えられた。

Report

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

    (9 results)

All 2024 2022 Other

All Int'l Joint Research (1 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results) Presentation (3 results)

  • [Int'l Joint Research] European Hereditary Tumor Group(英国)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Clinicopathological characteristics of Lynch-like syndrome2024

    • Author(s)
      Nakamori S, Takao M, Takao A, Natsume S, Iijima T, Kojika E, Nakano D, Kawai K, Inokuchi T, Fujimoto A, Urushibara M, Horiguchi SI, Ishida H, Yamaguchi T.
    • Journal Title

      International Journal of Clinical Oncology

      Volume: - Issue: 7 Pages: 944-952

    • DOI

      10.1007/s10147-024-02527-x

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Risk of first onset of colorectal cancer associated with alcohol consumption in Lynch syndrome: a multicenter cohort study2022

    • Author(s)
      Fujiyoshi Kenji、Sudo Tomoya、Fujita Fumihiko、Chino Akiko、Akagi Kiwamu、Takao Akinari、Yamada Masayoshi、Tanakaya Kohji、Ishida Hideyuki、Komori Koji、Ishihara Soichiro、Miguchi Masashi、Hirata Keiji、Miyakura Yasuyuki、Ishikawa Toshiaki、Yamaguchi Tatsuro、Tomita Naohiro、Ajioka Yoichi、Sugihara Kenichi
    • Journal Title

      International Journal of Clinical Oncology

      Volume: 27 Issue: 6 Pages: 1051-1059

    • DOI

      10.1007/s10147-022-02148-2

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Fusobacterium nucleatum load in MSI colorectal cancer subtypes2022

    • Author(s)
      Ono Tomoyuki、Yamaguchi Tatsuro、Takao Misato、Kojika Ekumi、Iijima Takeru、Horiguchi Shin-ichiro
    • Journal Title

      International Journal of Clinical Oncology

      Volume: 27 Issue: 10 Pages: 1580-1588

    • DOI

      10.1007/s10147-022-02218-5

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Colorectal cancer incidences in Lynch syndrome: a comparison of results from the prospective lynch syndrome database and the international mismatch repair consortium2022

    • Author(s)
      Moler Pl、Seppala Toni、Tatsuro Yamaguchi、他、The European Hereditary Tumour Group (EHTG) and the International Mismatch Repair Consortium (IMRC)
    • Journal Title

      Hereditary Cancer in Clinical Practice

      Volume: 20 Issue: 1 Pages: 36-36

    • DOI

      10.1186/s13053-022-00241-1

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Current practice of colonoscopy surveillance in patients with lynch syndrome: A multicenter retrospective cohort study in Japan2022

    • Author(s)
      Miyakura Yasuyuki、Chino Akiko、Tanakaya Kohji、Lefor Alan Kawarai、Akagi Kiwamu、Takao Akinari、Yamada Masayoshi、Ishida Hideyuki、Komori Koji、Sasaki Kazuhito、Miguchi Masashi、Hirata Keiji、Sudo Tomoya、Ishikawa Toshiaki、Yamaguchi Tatsuro、Tomita Naohiro、Ajioka Yoichi
    • Journal Title

      DEN Open

      Volume: 3 Issue: 1

    • DOI

      10.1002/deo2.179

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Lynch-like症候群の臨床病理学的特徴についての検討2022

    • Author(s)
      中守咲子、山口達郎、他
    • Organizer
      日本大腸肛門病学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 遺伝性大腸癌の診断と治療 当院におけるLynch-like syndrome12例の検討2022

    • Author(s)
      中守咲子、山口達郎、他
    • Organizer
      日本臨床外科学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Lynch-like症候群の臨床病理学的特徴について2022

    • Author(s)
      中守咲子、山口達郎、他
    • Organizer
      第97回大腸癌研究会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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