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CARF activates beta-catenin/TCF signaling in the hepatocellular carcinoma

Xin Fan1, Xiaoyan Ma2, Lei Cui1

  • 1Department of General Surgery, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, PR China.

Oncotarget
|November 10, 2016
PubMed

Insights

Collaborator of ARF (CARF) promotes hepatocellular carcinoma (HCC) growth by activating beta-catenin signaling. Targeting CARF may offer new therapeutic strategies for HCC treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Signaling

Background:

  • Ras signaling pathway overactivation is common in hepatocellular carcinoma (HCC).
  • Targeting Ras directly is challenging, necessitating identification of downstream effectors.
  • CARF (collaborator of ARF) was investigated as a potential Ras effector in HCC.

Purpose of the Study:

  • To investigate the role of CARF in HCC tumorigenesis.
  • To elucidate the mechanism by which CARF influences HCC progression.
  • To evaluate CARF as a potential therapeutic target for HCC.

Main Methods:

  • Utilized a genetically engineered mouse model (Alb-Cre; P53f/f; Loxp-Stop-Loxp-RasG12D) of HCC.
  • Analyzed CARF expression in HCC mouse models and human HCC samples.
  • Performed gain-of-function and loss-of-function studies on HCC cells (overexpression and knockdown of CARF).
  • Investigated CARF's interaction with beta-catenin and its effect on beta-catenin/TCF signaling.

Main Results:

  • CARF expression is induced by oncogenic RasV12 and upregulated in HCC.
  • CARF overexpression promotes HCC cell growth and migration.
  • CARF knockdown inhibits HCC cell growth, migration, and tumorigenesis.
  • CARF interacts with beta-catenin, disrupts beta-catenin/ICAT interaction, and activates beta-catenin/TCF signaling.

Conclusions:

  • CARF functions as an oncogene in HCC tumorigenesis.
  • CARF promotes HCC by activating beta-catenin/TCF signaling.
  • CARF represents a potential therapeutic target for HCC treatment.
Keywords:
CARFHCCRasV12beta-catenin/TCF signaling

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