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Angiomotin decreases lung cancer progression by sequestering oncogenic YAP/TAZ and decreasing Cyr61 expression

Y-L Hsu1, J-Y Hung2, S-H Chou3

  • 1Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.

Oncogene
|November 11, 2014
PubMed

Insights

Angiomotin (AMOT) suppresses lung cancer metastasis. Loss of AMOT promotes cancer growth and spread by increasing nuclear translocation of YAP/TAZ, highlighting AMOT as a potential therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Lung cancer is a leading cause of cancer mortality globally.
  • Metastasis is responsible for the majority of lung cancer deaths.
  • Angiomotin (AMOT) interacts with YAP/TAZ proteins, suggesting a role in tumor progression, but its function in lung cancer is unclear.

Purpose of the Study:

  • To investigate the role of AMOT in lung cancer progression and metastasis.
  • To elucidate the molecular mechanisms by which AMOT influences lung cancer development.

Main Methods:

  • Analysis of AMOT expression in clinical lung cancer specimens.
  • In vitro studies involving AMOT knockdown in lung cancer cell lines (CL1-0) to assess proliferation, migration, invasion, and epithelial-mesenchymal transition (EMT).
  • In vivo studies using a Lewis lung carcinoma model to evaluate the effect of AMOT knockdown on tumor growth and metastasis.

Main Results:

  • AMOT expression is significantly reduced in clinical lung cancer samples.
  • AMOT knockdown in CL1-0 cells led to increased proliferation, migration, invasion, and EMT.
  • AMOT loss promoted cancer progression via decreased cytoplasmic sequestration and increased nuclear translocation of YAP/TAZ, upregulating Cyr61.
  • The pro-tumorigenic effects of AMOT knockdown were dependent on YAP/TAZ and Cyr61.
  • AMOT knockdown enhanced tumor growth and metastasis in vivo.

Conclusions:

  • AMOT acts as a critical suppressor of lung cancer metastasis.
  • AMOT functions as a tumor suppressor by inhibiting the YAP/TAZ/Cyr61 pathway.
  • AMOT holds potential as a prognostic biomarker and therapeutic target for lung cancer.

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