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Transcriptional profiling identifies gene expression changes associated with IFN-alpha tolerance in hepatitis

Nathalie Wong1, Kathy Y-Y Chan, Pascale F Macgregor

  • 1Department of Anatomical and Cellular Pathology, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, N.T., Hong Kong. natwong@cuhk.edu.hk

Clinical Cancer Research : an Official Journal of the American Association for Cancer Research
|February 15, 2005
PubMed
Abstract

Insights

Hepatocellular carcinoma (HCC) cells show resistance to interferon-alpha (IFN-alpha) therapy due to drug-inducible gene expression changes. Identifying these molecular targets could improve HCC treatment outcomes.

Area of Science:

  • Hepatocellular Carcinoma Research
  • Cancer Therapeutics
  • Molecular Biology

Background:

  • Interferon-alpha (IFN-alpha) therapy shows antitumor effects in hepatocellular carcinoma (HCC).
  • Predicting individual patient response to IFN-alpha is challenging due to resistance.
  • Understanding IFN-alpha resistance mechanisms is crucial for optimizing HCC treatment.

Purpose of the Study:

  • To analyze the effect of IFN-alpha on human HCC cells.
  • To identify molecular targets and gene expression changes associated with IFN-alpha resistance.
  • To explore potential therapeutic strategies for overcoming IFN-alpha resistance in HCC.

Main Methods:

  • Treatment of various human HCC cell lines (HCV-related, HBV-related, non-B non-C-related) with IFN-alpha.
  • Assessment of cytotoxic effects on cell viability using IC50 values.
  • Gene expression profiling via cDNA microarray and quantitative reverse transcription-PCR.

Main Results:

  • HCV-related HCC cell lines exhibited significantly higher resistance to IFN-alpha compared to HBV-related and non-B non-C-related cell lines.
  • Hierarchical clustering revealed distinct molecular features in IFN-alpha-tolerant HCV-related cell lines.
  • Differential expression analysis identified 149 genes (51 up-regulated, 98 down-regulated) associated with IFN-alpha resistance, including UBA2, ZNF185, FOXF1, and UBE4B.

Conclusions:

  • IFN-alpha insensitivity in HCC cells is linked to drug-inducible transcriptional alterations.
  • Specific candidate genes may confer an anti-apoptotic effect, contributing to IFN-alpha resistance.
  • Further research into these identified genes could lead to improved IFN-alpha-based therapies for HCC.

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