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A Platform of Synthetic Lethal Gene Interaction Networks Reveals that the GNAQ Uveal Melanoma Oncogene Controls the

Xiaodong Feng1, Nadia Arang2, Damiano Cosimo Rigiracciolo3

  • 1Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA; State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.

Cancer Cell
|February 19, 2019
PubMed

Insights

Activating GNAQ mutations drive uveal melanoma (UM). Researchers identified focal adhesion kinase (FAK) as a therapeutic target, showing FAK inhibition halts UM growth by blocking GNAQ-driven YAP signaling.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Activating mutations in GNAQ/GNA11 genes drive oncogenesis in uveal melanoma (UM).
  • Currently, no effective therapies exist for UM.
  • Gαq G proteins are implicated in UM pathogenesis.

Purpose of the Study:

  • To identify novel therapeutic targets for UM.
  • To investigate the role of focal adhesion kinase (FAK) in GNAQ-driven UM.
  • To elucidate the signaling pathways linking GNAQ activation to tumor growth.

Main Methods:

  • Integrated bioinformatics analysis to identify synthetic lethal genes.
  • Genetic ablation and pharmacological inhibition of FAK.
  • Transcriptome analysis to study FAK-regulated genes.
  • Investigation of Hippo signaling pathway components.

Main Results:

  • PTK2 (encoding FAK) was identified as a synthetic lethal gene with GNAQ activation.
  • Gαq activates FAK via TRIO-RhoA signaling, and FAK inhibition reduces UM growth.
  • GNAQ stimulates YAP through FAK, which inhibits core Hippo signaling via MOB1 phosphorylation.

Conclusions:

  • FAK is a critical mediator of GNAQ-driven UM.
  • FAK represents a promising therapeutic target for UM.
  • Targeting FAK may be effective for Gαq-driven cancers with aberrant YAP function.
Keywords:
FAKG proteinGNA11GNAQHippoMOB1PTK2YAPsignal transductionuveal melanoma

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