β-catenin contributes to lung tumor development induced by EGFR mutations

Sohei Nakayama, Natasha Sng, Julian Carretero, Robert Welner, Yuichiro Hayashi, Mihoko Yamamoto, Alistair J. Tan, Norihiro Yamaguchi, Hiroyuki Yasuda, Danan Li, Kenzo Soejima, Ross A. Soo, Daniel B. Costa, Kwok Kin Wong, Susumu S. Kobayashi

研究成果: Article査読

46 被引用数 (Scopus)

抄録

The discovery of somatic mutations in EGFR and development of EGFR tyrosine kinase inhibitors (TKI) have revolutionized treatment for lung cancer. However, resistance to TKIs emerges in almost all patients and currently no effective treatment is available. Here, we show that β-catenin is essential for development of EGFR-mutated lung cancers. β-Catenin was upregulated and activated in EGFR-mutated cells. Mutant EGFR preferentially bound to and tyrosine phosphorylated β-catenin, leading to an increase in β-catenin-mediated transactivation, particularly in cells harboring the gefitinib/erlotinib-resistant gatekeeper EGFR-T790M mutation. Pharmacologic inhibition of β-catenin suppressed EGFR-L858R-T790M mutated lung tumor growth, and genetic deletion of the β-catenin gene dramatically reduced lung tumor formation in EGFR-L858R-T790M transgenic mice. These data suggest that b-catenin plays an essential role in lung tumorigenesis and that targeting the β-catenin pathway may provide novel strategies to prevent lung cancer development or overcome resistance to EGFR TKIs.

本文言語English
ページ(範囲)5891-5902
ページ数12
ジャーナルCancer Research
74
20
DOI
出版ステータスPublished - 2014 10 15

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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