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Regulation of cell growth by selective COX-2 inhibitors in oral carcinoma cell lines

C Y Yang1, C L Meng, C L Liao

  • 1Department of Dentistry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC.

Prostaglandins & Other Lipid Mediators
|December 17, 2003
PubMed

Insights

Selective cyclooxygenase-2 (COX-2) inhibitors significantly inhibited oral cancer cell growth, suggesting COX-2 plays a role in oral cancer progression. Non-steroidal anti-inflammatory drugs targeting COX-2 show potential for oral cancer treatment.

Area of Science:

  • Oncology
  • Pharmacology
  • Biochemistry

Background:

  • Non-steroidal anti-inflammatory drugs (NSAIDs) inhibiting prostaglandin synthesis are linked to reduced colorectal cancer incidence.
  • Cyclooxygenase-2 (COX-2) inhibition is a proposed mechanism for NSAID-mediated cancer chemoprevention.

Purpose of the Study:

  • To investigate the role of COX-2 in oral cancer by examining the effects of selective COX-2 inhibitors on oral carcinoma cell lines.
  • To compare the efficacy of selective COX-2 inhibitors (Celebrex, DFU, NS-398) versus a COX-1 inhibitor (Aspirin) on oral cancer cell growth.

Main Methods:

  • Treatment of human oral carcinoma cell lines (OEC-M1, KB) and a normal fibroblast cell line (NF) with varying concentrations of selective COX-2 inhibitors and COX-1 inhibitors.
  • Assessment of cell growth inhibition over different time periods (2-6 days).
  • Determination of half-maximal inhibitory concentration (IC50) values for the inhibitors on the cell lines.

Main Results:

  • Selective COX-2 inhibitors (DFU, Celebrex, NS-398) significantly inhibited the growth of both OEC-M1 and KB oral cancer cell lines.
  • The COX-1 inhibitor Aspirin did not show significant growth inhibition.
  • NS-398 demonstrated the lowest IC50 values, indicating potent inhibition of oral cancer cell growth.

Conclusions:

  • COX-2 selective inhibitors effectively suppress the growth of human oral carcinoma cell lines.
  • These findings support the hypothesis that COX-2 is involved in the proliferation of oral cancer cells.
  • Targeting COX-2 may represent a viable therapeutic strategy for human oral cancer.

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