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RNA modification affecting lymph node metastasis in esophageal cancer

Research Project

Project/Area Number 20K09048
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 55020:Digestive surgery-related
Research InstitutionAkita University

Principal Investigator

Motoyama Satoru  秋田大学, 医学系研究科, 非常勤講師 (60292372)

Co-Investigator(Kenkyū-buntansha) 久場 敬司  秋田大学, 医学系研究科, 非常勤講師 (10451915)
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: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywordsリンパ節転移 / Galectin / 腫瘍免疫 / RNA-seq解析 / 空間的トランスクリプトーム解析 / microRNA / mRNA / 炎症 / 固形癌 / エピトランスクリプトーム
Outline of Research at the Start

本研究では我々が先の研究により確立させたリンパ節転移動物実験モデルとそこから得られた培養細胞クローンを用いてRNA修飾、つまりエピトランスクリプトームの網羅的な解析を全RNAのみならず、mRNA、lncRNA、circRNA、pre-miRNA、pri-miRNA、snoRNA、snRNAの各クラスで解析する。さらに最近急速に発展したCRISPR-Cas9による遺伝子編集により、同定したRNAをノックダウンさせることによりマウスモデルのリンパ節転移状況に大きな変化が現れるかを検証する。また、得られた知見を臨床サンプルにより検証し、エピトランスクリプトームによる食道癌リンパ節転移支配を解明する。

Outline of Final Research Achievements

Lymph node (LN) metastasis predicts poor prognosis in esophageal cancer patients, whereas the underlying mechanisms remain. Using a syngeneic mouse squamous cell carcinoma (SCC) model of NR-S1M cells, we isolated metastasized NR-S1M cells from LNs in tumor-bearing mice and established metastatic NR-S1M cells in in vitro culture. RNA-seq analysis revealed that interferon gene signature was markedly downregulated in metastatic NR-S1M cells compared with parental cells, and in vivo NR-S1M tumors heterogeneously developed focal immunosuppressive areas featured by deficiency of anti-tumor immune cells. Spatial transcriptome analysis (Visium) for the NR-S1M tumors revealed that Galectin-7 was a novel metastasis-driving factor. Deletion of Galectin-7 in NR-S1M cells significantly suppressed LN metastasis without affecting primary tumor growth. Galectin-7 is a new crucial mediator LN metastasis.

Academic Significance and Societal Importance of the Research Achievements

RNA-Seq及びVisium空間的トランスクリプトーム解析から見出したGalectin分子が癌リンパ節転移における重要な因子であることが示唆された。近年、がん抗原ワクチン療法、免疫チェックポイント阻害療法、CAR-T療法の開発など、癌治療において腫瘍免疫学は最も期待されている分野である。本研究におけるGalectin分子の免疫抑制分子機序の解明は、腫瘍免疫学分野からの新たなリンパ節転移治療法の開発につながる重要な基礎研究になる。

Report

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

    (6 results)

All 2022 2020

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

  • [Journal Article] Identification of Galectin-7 as a crucial metastatic enhancer of squamous cell carcinoma associated with immunosuppression2022

    • Author(s)
      An Jianbo、Nagaki Yushi、Motoyama Satoru、Kuze Yuta、Hoshizaki Midori、Kemuriyama Kohei、Yamaguchi Tomokazu、Ebihara Takashi、Minamiya Yoshihiro、Suzuki Yutaka、Imai Yumiko、Kuba Keiji
    • Journal Title

      Oncogene

      Volume: 41 Issue: 50 Pages: 5319-5330

    • DOI

      10.1038/s41388-022-02525-1

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Peritumoral CD16b positive-neutrophil accumulation strongly correlates with regional lymph node metastasis in thoracic esophageal squamous cell cancer.2022

    • Author(s)
      Fujita H, Motoyama S, An J, Nagakai Y, Yamaguchi T, Koyota S, Sato Y, Wakita A, Imai K. Kuba K, Minamiya Y.
    • Journal Title

      Surgery

      Volume: Online ahead of print

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] m6A demethylase ALKBH5 promotes proliferation of esophageal squamous cell carcinoma associated with poor prognosis2020

    • Author(s)
      Nagaki Yushi、Motoyama Satoru、Yamaguchi Tomokazu、Hoshizaki Midori、Sato Yusuke、Sato Teruki、Koizumi Yukio、Wakita Akiyuki、Kawakita Yuta、Imai Kazuhiro、Nanjo Hiroshi、Watanabe Hiroyuki、Imai Yumiko、Minamiya Yoshihiro、Kuba Keiji
    • Journal Title

      Genes to Cells

      Volume: 25 Issue: 8 Pages: 547-561

    • DOI

      10.1111/gtc.12792

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Verification of the optimal interval before esophagectomy after preoperative neoadjuvant chemoradiotherapy for locally advanced thoracic esophageal cancer2020

    • Author(s)
      Wakita A, Motoyama S, Sato Y, Nagaki Y, Fujita H, Terata K, Imai K, MInamiya Y
    • Journal Title

      Ann Surg Oncol

      Volume: 28 Issue: 4 Pages: 2101-2110

    • DOI

      10.1245/s10434-020-09206-x

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Prognostic significance of combined platelet distribution width and C-reactive protein score in esophageal cancer2020

    • Author(s)
      Kawakita Y, Motoyama S, Sato Y, Wakita A, Nagaki Y, Imai K, Minamiya Y
    • Journal Title

      Anticancer Res

      Volume: 40 Issue: 10 Pages: 5715-5725

    • DOI

      10.21873/anticanres.14586

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] m6A脱メチル化酵素ALKBH5は食道扁平上皮癌の細胞増殖を促進する予後不良因子である2020

    • Author(s)
      長岐雄志,本山悟,山口智和,星崎みどり,佐藤雄亮,脇田晃行,川北雄太,南條博,南谷佳弘,久場敬司
    • Organizer
      第120回日本外科学会
    • Related Report
      2020 Research-status Report

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

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