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2021 Fiscal Year Final Research Report

Identification of the mechanisms underlying tumorigenesis by oncogenic tyrosine kinases

Research Project

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Project/Area Number 16K21746
Research Category

Fund for the Promotion of Joint International Research (Home-Returning Researcher Development Research)

Allocation TypeMulti-year Fund
Research Field Tumor biology
Research InstitutionNational Cancer Center Japan

Principal Investigator

Kobayashi Susumu  国立研究開発法人国立がん研究センター, 先端医療開発センター, 分野長 (70792836)

Co-Investigator(Kenkyū-buntansha) 犬塚 博之  東北大学, 歯学研究科, 准教授 (20335863)
Project Period (FY) 2018 – 2021
Keywordsチロシンキナーゼ / 肺癌 / EGFR / 薬剤耐性
Outline of Final Research Achievements

The development of EGFR tyrosine kinase inhibitors revolutionized treatment of advanced/metastatic non-small-cell lung cancer with the EGFR mutations. However, resistance emerges over time in most patients who initially respond positively. Therefore, development of novel therapies to prevent and/or overcome resistance is required. We have demonstrated that β-catenin is phosphorylated in tumors harboring EGFR mutations, which induces BCL-xL expression and increases tumor cell survival through TBX5 transactivation. We believe that inhibition of theβ-catenin-TBX5-BCL-xL will overcome resistance to EGFR inhibitors and provide better prognosis for lung cancer patients with the EGFR mutations.

Free Research Field

腫瘍学

Academic Significance and Societal Importance of the Research Achievements

非小細胞肺癌におけるEGFR遺伝子活性型変異の発見とEGFRチロシンキナーゼ阻害薬の導入は、固形癌治療における分子標的療法の有効性を示した。しかし、治療開始時の劇的な効果にもかかわらず、ほぼすべての患者で再発が認められ、進行性非小細胞肺癌の完全治癒には至っていない。本研究は、細胞株、実験動物、患者検体を用いてEGFR阻害薬に対する耐性機構の一部の解明と、その克服法を示したという点で、極めて学術的・社会的意義の大きい研究であると考える。今後、実際の臨床応用を見据えたさらなる研究が必要である。

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Published: 2023-01-30  

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