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The activated Notch1 signal pathway is associated with gastric cancer progression through cyclooxygenase-2

Tien-Shun Yeh1, Chew-Wun Wu, Kai-Wen Hsu

  • 1Department of Anatomy and Cell Biology, National Yang-Ming University, Taipei 112, Taiwan. tsyeh@ym.edu.tw

Cancer Research
|June 4, 2009
PubMed

Insights

The Notch1 signal pathway promotes gastric cancer progression by increasing cyclooxygenase-2 (COX-2) expression. This pathway, involving Jagged1 and Notch1 receptor intracellular domain (N1IC), enhances tumor growth and metastasis, offering potential therapeutic targets.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Gastric carcinoma is a leading cause of cancer mortality globally.
  • Mechanisms regulating gastric cancer aggressiveness remain incompletely understood.
  • Dissecting molecular pathways is crucial for developing novel therapeutic strategies.

Purpose of the Study:

  • To investigate the role of the Notch1 signal pathway in gastric cancer progression.
  • To determine if Notch1 activation influences tumor aggressiveness and molecular mechanisms.

Main Methods:

  • Correlating Jagged1 expression with patient survival in gastric cancer.
  • Assessing the impact of Notch1 receptor intracellular domain (N1IC) on cancer cell proliferation, migration, and invasion.
  • Analyzing the binding of N1IC and CBF1 to the cyclooxygenase-2 (COX-2) promoter.
  • Evaluating the effects of COX-2 inhibition and knockdown on N1IC-mediated cellular processes.

Main Results:

  • Jagged1 expression correlated with poor survival in gastric cancer patients.
  • N1IC enhanced colony formation, tumor growth, migration, and invasion of gastric cancer cells.
  • N1IC and CBF1 upregulated COX-2 expression via the CBF1-dependent pathway.
  • COX-2 inhibition or knockdown reversed N1IC-induced pro-tumorigenic effects, which were restored by prostaglandin E2 or exogenous COX-2.

Conclusions:

  • Notch1 signaling activation promotes gastric cancer progression.
  • The Notch1 pathway exerts its effects, at least partly, through the upregulation of COX-2.
  • Targeting the Notch1-COX-2 axis may represent a viable therapeutic strategy for gastric cancer.

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