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Jumonji/Arid1b (Jarid1b) protein modulates human esophageal cancer cell growth

Yoshihiro Kano1, Masamitsu Konno2, Katsuya Ohta1

  • 1Departments of Frontier Science for Cancer and Chemotherapy, Osaka University, Graduate School of Medicine, Suita, Osaka 565-0871; ; Gastroenterological Surgery, Osaka University, Graduate School of Medicine, Suita, Osaka 565-0871;

Molecular and Clinical Oncology
|March 21, 2014
PubMed

Insights

The epigenetic factor JARID1B promotes esophageal cancer stem cell growth and invasion. Inhibiting JARID1B suppressed tumor cell growth, but this effect was reversed in vivo, suggesting its critical role in maintaining esophageal cancer stemness.

Area of Science:

  • Oncology
  • Epigenetics
  • Cancer Stem Cell Biology

Background:

  • Esophageal cancer is heterogeneous, with suspected roles for epigenetic regulation of cancer stem cells.
  • The specific biological significance of epigenetically modified molecules in regulating cancer subpopulations requires further elucidation.

Purpose of the Study:

  • To investigate the functional roles of the H3K4 demethylase Jumonji/Arid1b (JARID1B) in esophageal cancer.
  • To determine the impact of JARID1B on esophageal cancer cell growth, stemness, and invasion.

Main Methods:

  • Utilized esophageal cancer cell lines for in vitro studies.
  • Performed JARID1B knockdown experiments.
  • Assessed cell growth, sphere formation, and invasion.
  • Evaluated epithelial marker expression.
  • Conducted subcutaneous inoculation into immune-deficient mice to assess in vivo tumor formation.

Main Results:

  • JARID1B knockdown suppressed esophageal cancer cell growth, sphere formation, and invasion.
  • Loss of epithelial marker expression was associated with JARID1B knockdown.
  • Inhibitory effects on tumor formation were reversed upon inoculation into immune-deficient mice.
  • JARID1B was identified as crucial for maintaining esophageal cancer stem cells.

Conclusions:

  • JARID1B plays a significant role in maintaining esophageal cancer stem cells.
  • Continuous inhibition of JARID1B is a potential therapeutic strategy for esophageal cancer.
  • Further research is warranted to explore the therapeutic potential of JARID1B inhibition.
Keywords:
Jumonji/Arid1Besophageal cancergastrointestinal organs

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