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Genomic and epigenomic analyses of microsatellite instability-high colorectal cancers

Research Project

Project/Area Number 16K07143
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Tumor diagnostics
Research InstitutionThe University of Tokyo

Principal Investigator

Tanaka Toshiaki  東京大学, 医学部附属病院, 助教 (30647540)

Co-Investigator(Kenkyū-buntansha) 渡邉 聡明  東京大学, 医学部附属病院, 教授 (80210920)
石原 聡一郎  東京大学, 医学部附属病院, 教授 (00376443)
山口 博紀  東京大学, 医学部附属病院, 登録研究員 (20376445)
河津 正人  国立研究開発法人国立がん研究センター, 研究所, ユニット長 (20401078)
野澤 宏彰  東京大学, 医学部附属病院, 准教授 (80529173)
川合 一茂  東京大学, 医学部附属病院, 講師 (80571942)
畑 啓介  東京大学, 医学部附属病院, 特任講師 (60526755)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsマイクロサテライト不安定性 / 大腸癌 / リンチ症候群 / MLH1遺伝子メチル化 / リンチ様大腸腫瘍 / 大腸がん / 免疫染色
Outline of Final Research Achievements

Sporadic MSI-H CRCs were further classifiable into somatic mismatch repair (MMR) gene mutation (Lynch-like, LL) or MLH1 methylated (MM) types. Methylation of other MMR genes (MSH2/MSH6/PMS2) was not detected. The mutational and clinicopathological properties of 26 LL CRCs more closely resembled those of 24 LS-associated tumors than those of 99 MM CRCs. There were significant differences between LS/LL and MM groups in age, location, number of insertions/deletions, recurrent mutations of KRAS/APC and BRAF/RNF43.
Fusion kinases were detected in 11/20 (55%) MM MSI-H CRCs lacking KRAS/BRAF oncogenes. A 3T3 transformation assay confirmed the tumorigenicity of identified fusion kinases, ERBB2(L755S), and ERBB2(L841I).

Academic Significance and Societal Importance of the Research Achievements

高頻度マイクロサテライト不安定性を呈する大腸癌のゲノム・エピゲノム解析によりサブタイプ分類を行なったところ、リンチ症候群・MLH1メチル化を有する大腸癌・リンチ様大腸癌の3群に分類されることが明らかになった。そのうち、MLH1メチル化大腸癌において、治療標的となり得る融合キナーゼが比較的高頻度に認められることが明らかになった。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (2 results)

All 2019 2018

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results)

  • [Journal Article] Differential regulation of CpG island methylation within divergent and unidirectional promoters in colorectal cancer2019

    • Author(s)
      Namba Shinichi、Sato Kazuhito、Kojima Shinya、Ueno Toshihide、Yamamoto Yoko、Tanaka Yosuke、Inoue Satoshi、Nagae Genta、Iinuma Hisae、Hazama Shoichi、Ishihara Soichiro、Aburatani Hiroyuki、Mano Hiroyuki、Kawazu Masahito
    • Journal Title

      Cancer Science

      Volume: 110 Issue: 3 Pages: 1096-1104

    • DOI

      10.1111/cas.13937

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Fusion Kinases Identified by Genomic Analyses of Sporadic Microsatellite Instability?High Colorectal Cancers2018

    • Author(s)
      Sato Kazuhito、Kawazu Masahito、Yamamoto Yoko、Ueno Toshihide、Kojima Shinya、Nagae Genta、Abe Hiroyuki、Soda Manabu、Oga Takafumi、Kohsaka Shinji、Sai Eirin、Yamashita Yoshihiro、Iinuma Hisae、Fukayama Masashi、Aburatani Hiroyuki、Watanabe Toshiaki、Mano Hiroyuki
    • Journal Title

      Clinical Cancer Research

      Volume: 25 Issue: 1 Pages: 378-389

    • DOI

      10.1158/1078-0432.ccr-18-1574

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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