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VGLL4 functions as a new tumor suppressor in lung cancer by negatively regulating the YAP-TEAD transcriptional

Wenjing Zhang1, Yijun Gao1, Peixue Li1

  • 1State Key Laboratory of Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Yueyang Road, Shanghai 200031, China.

Cell Research
|January 25, 2014
PubMed

Insights

VGLL4 acts as a novel tumor suppressor in lung cancer. It inhibits lung cancer growth and progression by negatively regulating the Hippo (Hpo) pathway and YAP-TEAD complex formation.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Lung cancer exhibits high global incidence and mortality.
  • The Hippo (Hpo) pathway is a critical regulator of organ size and implicated in cancer development.
  • Understanding novel regulators of lung carcinogenesis is crucial for therapeutic advancements.

Purpose of the Study:

  • To identify novel tumor suppressors in lung cancer.
  • To investigate the role of VGLL4 in lung carcinogenesis.
  • To elucidate the mechanism by which VGLL4 regulates the Hippo (Hpo) pathway.

Main Methods:

  • Analysis of VGLL4 expression in lung cancer specimens (mouse and human).
  • In vitro studies assessing the effect of VGLL4 ectopic expression on lung cancer cell growth.
  • In vivo studies using a de novo mouse model to evaluate VGLL4's impact on lung cancer progression.
  • Biochemical assays to determine VGLL4's interaction with YAP and TEAD proteins.

Main Results:

  • VGLL4 is frequently downregulated in lung cancer tissues.
  • Ectopic VGLL4 expression suppresses lung cancer cell proliferation in vitro.
  • VGLL4 inhibits lung cancer progression in vivo.
  • VGLL4 directly competes with YAP for binding to TEADs, inhibiting YAP-TEAD complex activity.

Conclusions:

  • VGLL4 functions as a novel tumor suppressor in lung cancer.
  • VGLL4 exerts its tumor-suppressive effects by inhibiting the Hippo (Hpo) pathway through negative regulation of YAP-TEAD complex formation.
  • VGLL4 represents a potential therapeutic target for lung cancer treatment.

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