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COX-2: a molecular target for colorectal cancer prevention

Joanne R Brown1, Raymond N DuBois

  • 1The Vanderbilt-Ingram Cancer Center, Nashville, TN 37232, USA.

Journal of Clinical Oncology : Official Journal of the American Society of Clinical Oncology
|April 20, 2005
PubMed

Insights

Nonsteroidal anti-inflammatory drugs (NSAIDs) show protective effects against colorectal cancers (CRCs). Specifically, cyclooxygenase-2 (COX-2) inhibitors are being evaluated for broader use due to their role in cancer progression.

Area of Science:

  • Biochemistry
  • Oncology
  • Pharmacology

Background:

  • Cyclooxygenase (COX) is a key enzyme in prostanoid biosynthesis and is implicated in human cancers.
  • Nonsteroidal anti-inflammatory drugs (NSAIDs), which inhibit COX activity, have demonstrated protective effects against colorectal cancers (CRCs).
  • The inducible COX-2 isoform is overexpressed in CRC tissues, correlating with a poor prognosis.

Purpose of the Study:

  • To investigate the role of cyclooxygenase (COX) enzymes, particularly COX-2, in the development and progression of colorectal cancers (CRCs).
  • To evaluate the therapeutic potential of nonsteroidal anti-inflammatory drugs (NSAIDs) and selective COX-2 inhibitors in CRC prevention and treatment.

Main Methods:

  • Review of observational and randomized controlled studies on NSAIDs and CRC.
  • Analysis of experimental studies elucidating the mechanisms of COX-2 in carcinogenesis.
  • Examination of clinical trial data for selective COX-2 inhibitors in familial polyposis and broader populations.

Main Results:

  • Numerous studies confirm the protective effects of NSAIDs against CRC development.
  • Overexpression of COX-2 in CRC tissues is a significant negative prognostic indicator.
  • Experimental evidence highlights COX-2's crucial role in cancer-related pathways.

Conclusions:

  • NSAIDs, particularly COX-2 inhibitors, hold significant promise for colorectal cancer prevention and treatment.
  • Selective COX-2 inhibitors are approved for familial polyposis and are under investigation for wider clinical application.
  • Targeting COX-2 represents a viable strategy in the ongoing fight against colorectal cancer.

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