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The mechanism of PD-L1 expression and the clinical significance

Research Project

Project/Area Number 16K10680
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Respiratory surgery
Research InstitutionOsaka University

Principal Investigator

Funaki Soichiro  大阪大学, 医学系研究科, 講師 (50464251)

Co-Investigator(Kenkyū-buntansha) 南 正人  大阪大学, 医学部附属病院, 准教授 (10240847)
川村 知裕  大阪大学, 医学系研究科, 助教 (30528675)
奥村 明之進  大阪大学, 医学系研究科, 招へい教授 (40252647)
新谷 康  大阪大学, 医学系研究科, 准教授 (90572983)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords肺癌 / 胸腺上皮性腫瘍 / 腫瘍免疫 / がん免疫 / PD-L1 / 胸腺癌 / 上皮間葉移行 / PD-1/PD-L1 / 原発性肺癌 / 免疫チェックポイント / 癌免疫 / 非小細胞性肺癌 / 抗癌剤耐性 / 肺外科 / 免疫学
Outline of Final Research Achievements

In cancer immunology, the programmed cell death 1-programmed cell death 1/ligand 1 (PD-1/PD-L1) pathway plays a major role. Another key process in cancer progression is epithelial-mesenchymal transition (EMT). We investigated the mechanism of PD-L1 expression as well as changes in its expression during the EMT process in non-small cell lung cancer (NSCLC) and thymic cancer (TC). PD-L1 expression was evaluated after treatment with TGF-β or chemotherapeutic agents. The relationship between for PD-L1 and EMT in clinical specimens with NSCLC and TC after induction chemotherapy were analyzed by immunohistochemical staining. We found that PD-L1 expression was upregulated following TGF-β induction. Furthermore, chemo-treatment enhances PD-L1 expression via autocrine TGF-β induced EMT. Analysis of clinical samples revealed a significant relationship between PD-L1 expression and EMT status. In conclusion, our results suggest that PD-L1 expression is regulated by TGF-β induced EMT.

Academic Significance and Societal Importance of the Research Achievements

悪性腫瘍に対して従来からの手術、化学療法、放射線治療に続く第4の治療法としてがん免疫を利用した免疫チェックポイント阻害剤の有効性が報告されている。これは悪性新生物としてのがんに対しての免疫チェックポイント分子が免疫抑制に関与していることが判明しており、この関連性を排除することで、がんに対する免疫力を復活させて治療する全く新しい方法であるが、この免疫チェックポイント分子の発現機構については分かっていなかった。本研究では、その発現機構の一端を明らかにし、従来との治療に加えたcombination 治療の可能性について論じた。

Report

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

    (10 results)

All 2017 2016

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (9 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Chemotherapy enhances programmed cell death 1/ligand 1 expression via TGF-β induced epithelial mesenchymal transition in non-small cell lung cancer.2017

    • Author(s)
      Funaki S, Shintani Y, Kawamura T, Kanzaki R, Minami M, Okumura M.
    • Journal Title

      Oncology Report

      Volume: 38 Issue: 4 Pages: 2277-2284

    • DOI

      10.3892/or.2017.5894

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Nation-wide database of lung cancer in Japan2017

    • Author(s)
      Okumura M
    • Organizer
      National Continuing Medical Education Forum on General Thoracic Surgery
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Nation-wide database of thymic epithelial tumor in Japan2017

    • Author(s)
      Okumura M
    • Organizer
      National Continuing Medical Education Forum on General Thoracic Surgery
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Clinicopathological Significance of Epithelial Mesenchymal Transition in Thymic Cancer2017

    • Author(s)
      Shintain Y, Funaki S, Ose N, Kawamura T, Kanzaki R, Minami M, Morii E, Okumura M
    • Organizer
      World Conference on Lung Cance
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Prognostic impact of Programmed cell death-1 (PD-1) tumor-infiltrating lymphocytes and Programmed cell death-1 -ligand 1 (PD-L1) expression in thymic cancer2017

    • Author(s)
      Funaki S, Shintani Y, Ose N, T Kawamura T, Kanzaki R, Minami M, and Okumura M
    • Organizer
      World Conference on Lung Cance
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 非小細胞性肺癌におけるPD-L1発現制御について2017

    • Author(s)
      舟木壮一郎、福井絵里子、川村知裕、神崎 隆、新谷 康、南 正人、奥村明之進
    • Organizer
      第117回日本外科学会定期学術集会
    • Related Report
      2017 Research-status Report
  • [Presentation] 免疫チェックポイント経路PD-1/PD-L1の発現制御による肺癌治療法の確立2017

    • Author(s)
      舟木壮一郎、福井絵里子、川村知裕、神崎 隆、新谷 康、南 正人、奥村明之進
    • Organizer
      第34回日本呼吸器外科学会総会
    • Related Report
      2017 Research-status Report
  • [Presentation] The Regulation Of PD-L1 in Non Small Cell Lung Cancer2016

    • Author(s)
      Funaki S,Shintani Y,Fkui E, Kawamuara T, Minami M, Okumura M
    • Organizer
      EUROPEAN SOCIETY FOR MEDICAL ONCOLOGY Annual congress (41)
    • Place of Presentation
      Copenhagen,Denmark
    • Year and Date
      2016-10-07
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 胸腺癌におけるPD-L1発現制御について2016

    • Author(s)
      舟木壮一郎 福井絵里子,川村知裕,木村 亨,新谷 康,南 正人, 奥村明之進
    • Organizer
      第69回日本胸部外科学会定期学術集会
    • Place of Presentation
      岡山
    • Year and Date
      2016-09-28
    • Related Report
      2016 Research-status Report
  • [Presentation] 肺癌におけるPD-L1発現制御について2016

    • Author(s)
      舟木壮一郎
    • Organizer
      第33回日本呼吸器外科学会
    • Place of Presentation
      京都
    • Year and Date
      2016-05-12
    • Related Report
      2016 Research-status Report

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

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