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Updated: Jan 30, 2026

An In Vitro System to Study Tumor Dormancy and the Switch to Metastatic Growth
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Chemically Modified Antisense Oligonucleotide Against ARL4C Inhibits Primary and Metastatic Liver Tumor Growth

Takeshi Harada1, Shinji Matsumoto1, Suguru Hirota1

  • 1Department of Molecular Biology and Biochemistry, Graduate School of Medicine, Osaka University, Osaka, Japan.

Molecular Cancer Therapeutics
|January 17, 2019
PubMed

Insights

ADP-ribosylation factor-like 4c (ARL4C) is highly expressed in liver and colorectal cancers, driving tumor growth. Antisense oligonucleotides targeting ARL4C effectively inhibited cancer cell proliferation and tumor growth in preclinical models.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • ADP-ribosylation factor-like 4c (ARL4C) is a small GTP-binding protein.
  • ARL4C expression is elevated in lung and colorectal cancers, suggesting its role as a therapeutic target.
  • ARL4C is implicated in tubulogenesis and cellular processes regulated by Wnt and EGF signaling.

Purpose of the Study:

  • To investigate the role of ARL4C in hepatocellular carcinoma (HCC) and colorectal cancer liver metastases.
  • To evaluate the therapeutic potential of antisense oligonucleotides (ASO) targeting ARL4C.
  • To elucidate the downstream signaling pathways affected by ARL4C in HCC.

Main Methods:

  • Quantitative analysis of ARL4C expression in primary HCC and metastatic colorectal cancer tissues.
  • In vitro studies using chemically modified ARL4C-targeting ASOs to assess effects on cancer cell proliferation and migration.
  • In vivo studies involving subcutaneous injection of ARL4C ASO in immunodeficient mouse models of HCC and liver metastases.

Main Results:

  • ARL4C is highly expressed in primary HCC and colorectal cancer liver metastases, correlating with poor prognosis.
  • ARL4C ASOs significantly inhibited HCC and colorectal cancer cell proliferation and migration in vitro.
  • ARL4C ASOs reduced PIK3CD mRNA levels and AKT activity in HCC cells, indicating pathway modulation.
  • Subcutaneous ARL4C ASO administration suppressed tumor growth in vivo, with preferential accumulation in tumor cells.

Conclusions:

  • ARL4C is a promising therapeutic target for primary and metastatic liver cancers.
  • ARL4C ASO demonstrates efficacy in reducing tumor growth and proliferation in preclinical models.
  • ARL4C ASO represents a potential novel targeted nucleic acid therapy for liver cancer.

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