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Exploration of tissue-specific selective pressure on tumors; integration of time-course analysis by liquid biopsy

Research Project

Project/Area Number 20K22918
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0903:Organ-based internal medicine and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

IKUSHIMA Hiroaki  東京大学, 医学部附属病院, 届出研究員 (80719154)

Project Period (FY) 2020-09-11 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords肺癌 / リキッドバイオプシー
Outline of Research at the Start

癌細胞集団は決して均一な性状の細胞の集団ではなく、heterogeneityを持った集団であり、それに対してintrinsicないしextrinsicな「選択圧」が加わることで、heterogenousな集団の構成がダイナミックに変化していることが明らかとなってきている。本研究は、過去の臨床知見から転移組織特異的な「選択圧」の存在を仮定し、その分子メカニズムの解明を進めると同時に、その選択を受けたsubpopulationの存在を早期から低侵襲で検出することを目指すものである。

Outline of Final Research Achievements

It has been shown in our previous studies that tumor cells are subjected to different selection pressures in each tissue in lung cancer patients with multiple metastases, resulting in different heterogeneity in each tissue, which has a significant impact on treatment responsiveness in a body as a whole. In this study, we focused on epithelial-mesenchymal transition as one of the mechanisms that confer heterogeneity to lung cancer cells. To clarify the details of epithelial-mesenchymal transition at the cellular level (i.e., not only the change in compositional allocation within a cell population), we used single-cell gene expression analysis technology to capture the intermediate stage of epithelial-mesenchymal transition. We have developed a model to predict prognosis of lung cancer patients by combining single-cell gene expression analysis with machine learning.

Academic Significance and Societal Importance of the Research Achievements

肺癌の多発転移では転移組織毎にわずかに性状の異なった細胞集団が存在し、生体全体としてみるとそれが治療応答性に大きな影響を与えていることが、本研究者らのこれまでの研究で明らかとなっている。本研究では、正常肺組織からの単一細胞遺伝子発現データを用いて、上皮系・間葉系の発現プロファイルに対する機械学習を行い、それを肺癌組織の遺伝子発現データに適応することで、各肺癌組織が上皮間葉転換のどのような段階にあるかを判定するモデルを構築した。正常肺からの単一細胞遺伝子発現データに基づく腫瘍細胞の遺伝子発現パターンの解析は、肺癌患者の予後予測に有益な情報をもたらす可能性が示唆された。

Report

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

    (8 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (5 results)

  • [Journal Article] Multidisciplinary Therapy Including Insertion of Two Stents, Photodynamic Therapy, and Nine-line Chemotherapy Against Lung Squamous Cell Carcinoma2021

    • Author(s)
      生島 弘彬、平石 尚久、田宮 浩之、天野 陽介、鹿毛 秀宣、田中 剛、佐藤 雅昭、松元 祐司、土田 敬明、長瀬 隆英
    • Journal Title

      The Journal of the Japan Society for Respiratory Endoscopy

      Volume: 43 Issue: 5 Pages: 473-479

    • DOI

      10.18907/jjsre.43.5_473

    • NAID

      130008105738

    • ISSN
      0287-2137, 2186-0149
    • Year and Date
      2021-09-25
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multiple cerebral infarctions in ROS1‐rearranged lung adenocarcinoma2021

    • Author(s)
      Ikushima Hiroaki, Hiraishi Yoshihisa, Toriumi Kanto, Ando Takahiro, Tamiya Hiroyuki, Ishida Junichi, Amano Yosuke, Kage Hidenori, Tanaka Goh, Nagase Takahide
    • Journal Title

      Respirology Case Reports

      Volume: 9 Issue: 9

    • DOI

      10.1002/rcr2.831

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Histopathological heterogeneity in an atypical type A thymoma variant with pulmonary metastases2021

    • Author(s)
      Yanagiya Masahiro, Horiuchi Hajime, Hiyama Noriko, Matsumoto Jun, Ikushima Hiroaki, Sakatani Toshio, Hara Kei, Morikawa Teppei
    • Journal Title

      Pathology International

      Volume: 71 Issue: 6 Pages: 438-440

    • DOI

      10.1111/pin.13089

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Real-world evaluation of the safety and efficacy of mFOLFOX6 for unresectable advanced gastric cancer2022

    • Author(s)
      Hiroaki Ikushima, Kazuhiro Usui, Ken Ohata, Tamaki Noie, Nobuyuki Matsuhashi, Keita Uchino
    • Organizer
      第19回日本臨床腫瘍学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 確定診断に難渋した結核性リンパ節炎・心膜炎・胸膜炎の1例2021

    • Author(s)
      岡崎 俊祐、竹島 英之、吉田 敬士、藤井 洸希、西村 拓、生島 弘彬、渡邉 かおる、酒谷 俊雄、臼井 一裕
    • Organizer
      第246回日本呼吸器学会関東地方会・第180日本結核・非結核性抗酸菌症学会関東支部学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 肺血管拡張を伴った急性好酸球性肺炎の1例2021

    • Author(s)
      吉田 敬士、竹島 英之、藤井 洸希、西村 拓、渡邉 かおる、生島 弘彬、小原 さやか、酒谷 俊雄、臼井 一裕
    • Organizer
      第246回日本呼吸器学会関東地方会・第180日本結核・非結核性抗酸菌症学会関東支部学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Machine learning-based clustering of scRNAseq data from normal lung tissue and application to lung cancer2021

    • Author(s)
      生島弘彬、鹿毛秀宣、長瀬隆英
    • Organizer
      第18回日本臨床腫瘍学会学術集会
    • Related Report
      2020 Research-status Report
  • [Presentation] PDTを含む集学的治療を行い、化学療法9th-lineに至るまでの治療継続を行っている肺扁平上皮癌の一例2020

    • Author(s)
      中川紅葉、生島弘彬、宮下直也、平石尚久、田宮浩之、天野陽介、鹿毛秀宣、田中剛、佐藤雅昭、松元祐司、土田敬明、長瀬隆英
    • Organizer
      第174回日本呼吸器内視鏡学会関東支部会
    • Related Report
      2020 Research-status Report

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Published: 2020-09-29   Modified: 2023-01-30  

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