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Identification of resistance mechanism to ALK-TKIs in leptomeningeal carcinomatosis (LMC) model with EML4-ALK NSCLC cells

Research Project

Project/Area Number 19K16738
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionKanazawa University

Principal Investigator

Arai Sachiko  金沢大学, がん進展制御研究所, 特任助手 (80824870)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords薬剤耐性 / ALK肺癌 / 中枢神経系転移 / 薬物耐性 / ALK肺がん / 髄膜癌腫症
Outline of Research at the Start

髄膜癌腫症や脳転移などの中枢神経系(CNS)転移は肺癌の20~30%に発症し、患者のQOLを著しく低下させる危篤な病態であるが、CNS転移が耐性獲得による病勢増悪の場となることが多く、CNSにおける耐性の分子機構解明やCNSにも有効な分子標的薬の開発が特に注目されてきている。本研究では、ヒトALK肺癌細胞株をマウスの髄腔に移植したモデルにおいてアレクチニブ耐性を誘導し、得られた耐性株を用いて耐性機構を解明することを目的とする。さらに、耐性因子の阻害薬を用い、髄膜癌腫症モデルにおける治療効果を検討する。また、耐性因子の臨床検体における発現を検討し、その臨床的関与を明らかにする。

Outline of Final Research Achievements

This study aimed to clarify the mechanism of resistance to alectinib, a second-generation ALK-TKI, in Leptomeningeal carcinomatosis (LMC) and seek a novel therapeutic strategy. First, we induced alectinib resistance in an LMC mouse model using the ALK-rearranged NSCLC cell line A925L by continuous oral alectinib treatment, established AR cells from this model. AR cells acquired resistance through EGFR activation due to overexpression of its ligand, amphiregulin (AREG). In the LMC model with AR cells, combined treatment with alectinib and an EGFR-TKI successfully controlled LMC progression. Moreover, notably high AREG levels were detected in the cerebrospinal fluid from ALK-rearranged NSCLC patients with alectinib-resistant LMC compared with those in EGFR-mutated NSCLC patients with EGFR-TKI-resistant LMC or patients without LMC.
These findings indicate the potential of novel therapies dual-targeting ALK and EGFR against ALK-TKI-resistant LMC in ALK-rearranged NSCLC patients.

Academic Significance and Societal Importance of the Research Achievements

髄膜癌腫症や脳転移などの中枢神経系(CNS)転移は肺癌の20~30%に発症し、患者のQOLを著しく低下させる危篤な病態であるが、CNS転移が耐性獲得による病勢増悪の場となることが多く、CNSにおける耐性の分子機構解明やCNSにも有効な分子標的薬の開発が特に注目されてきている。本研究では、ヒトALK肺癌細胞株をマウスの髄腔に移植したモデルにおいてアレクチニブ耐性を誘導し、得られた耐性株を用いて耐性機構を解明するため、in vitroの培養とは異なり患者と同様の生体内における薬物動態や血液脳関門を含む脳微小環境も反映した耐性機構の発見である。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2020 2019

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

  • [Journal Article] Osimertinib Overcomes Alectinib Resistance Caused by Amphiregulin in a Leptomeningeal Carcinomatosis Model of ALK-Rearranged Lung Cancer.2020

    • Author(s)
      Sachiko Arai, Shinji Takeuchi, Koji Fukuda, Hirokazu Taniguchi, Akihiro Nishiyama, Azusa Tanimoto, Miyako Satouchi, Kaname Yamashita, Koshiro Ohtsubo, Shigeki Nanjo, Toru Kumagai, Ryohei Katayama, Makoto Nishio, Mei-Mei Zheng, Yi-Long Wu, Hiroshi Nishihara, Takushi Yamamoto, Mitsutoshi Nakada, Seiji Yano
    • Journal Title

      Journal of thoracic oncology

      Volume: 15 Issue: 5 Pages: 752-765

    • DOI

      10.1016/j.jtho.2020.01.001

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] EML4-ALK肺癌の髄膜癌腫症モデルにおけるamphiregulinに起因するアレクチニブ耐性の克服2020

    • Author(s)
      新井 祥子
    • Organizer
      日本がん転移学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] EML4-ALK肺癌の髄膜癌腫症モデルにおけるamphiregulinに起因するアレクチニブ耐性の克服2019

    • Author(s)
      新井 祥子
    • Organizer
      日本がん転移学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Osimertinib Overcomes Alectinib Resistance Caused by Amphiregulin in a Leptomeningeal Carcinomatosis Model of EML4-ALK Lung Cancer2019

    • Author(s)
      新井 祥子
    • Organizer
      World Conference on Lung Cancer
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

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