Related Experiment Video

Updated: Sep 17, 2025

An Oncogenic Hepatocyte-Induced Orthotopic Mouse Model of Hepatocellular Cancer Arising in the Setting of Hepatic Inflammation and Fibrosis
06:38

An Oncogenic Hepatocyte-Induced Orthotopic Mouse Model of Hepatocellular Cancer Arising in the Setting of Hepatic Inflammation and Fibrosis

Published on: September 12, 2019

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DHX34 deficiency triggers tumor-intrinsic immunity via a dsRNA-mediated type I interferon pathway activation in HCC

Chunli Zhang1, Limin Huang1, Zeyu Li1

  • 1Department of General Surgery, National-Local Joint Engineering Research Center of Biodiagnostic & Biotherapy, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, PR China.

Neoplasia (New York, N.Y.)
|July 1, 2025
PubMed

Insights

DHX34 depletion enhances hepatocellular carcinoma (HCC) immunogenicity by activating innate immune responses. This leads to T cell infiltration, impaired tumor growth, and improved survival in mice, suggesting DHX34 as a therapeutic target.

Area of Science:

  • Oncology
  • Immunology
  • Molecular Biology

Background:

  • Tumors evade immune surveillance by reducing immunogenicity.
  • DHX34, an RNA helicase, is crucial for mRNA decay.
  • The role of DHX34 in hepatocellular carcinoma (HCC) immunogenicity is unknown.

Purpose of the Study:

  • To investigate the function of DHX34 in regulating HCC immunogenicity.
  • To explore DHX34's mechanism in controlling tumor immunity.

Main Methods:

  • Analysis of DHX34-deficient HCC tumors in mice.
  • Assessment of T cell infiltration and activation.
  • Investigation of RNA sensing pathways and interferon response.

Main Results:

  • DHX34 depletion led to T cell infiltration and impaired tumor growth in HCC mouse models.
  • DHX34 deficiency caused dsRNA accumulation, activating cytosolic RNA-sensing pathways.
  • This resulted in a type-I interferon response, tumor-intrinsic immunity, and CD8 T cell activation.

Conclusions:

  • DHX34 suppresses dsRNA-driven innate immune activation in HCC, acting as a barrier to immunogenicity.
  • Targeting DHX34 could enhance HCC immunogenicity and synergize with immunotherapy.
  • DHX34 inhibition presents a potential novel therapeutic strategy for HCC.
Keywords:
DHX34Hepatocellular carcinomaImmune evasionType I interferondsRNA

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