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Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)
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Chemical-Induced Skin Carcinogenesis Model Using Dimethylbenz[a]Anthracene and 12-O-Tetradecanoyl Phorbol-13-Acetate (DMBA-TPA)

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Proteinase-activated receptor-2 (PAR2): a tumor suppressor in skin carcinogenesis

Anke Rattenholl1, Stephan Seeliger, Jörg Buddenkotte

  • 1Department of Dermatology and Interdisciplinary Center for Clinical Research IZKF Münster, University of Münster, Münster, Germany.

The Journal of Investigative Dermatology
|May 4, 2007
PubMed

Insights

Proteinase-activated receptor 2 (PAR2) plays a protective role in skin cancer development. PAR2-deficient mice exhibited more skin tumors, indicating PAR2

Area of Science:

  • Dermatology
  • Oncology
  • Molecular Biology

Background:

  • Proteinase-activated receptor 2 (PAR2) is implicated in tumor modulation across various tissues.
  • The specific function of PAR2 in the development of cutaneous cancers remains largely uncharacterized.

Purpose of the Study:

  • To investigate the role of PAR2 in the development of chemically induced epidermal skin tumors.
  • To elucidate the molecular mechanisms underlying PAR2's function in skin carcinogenesis.

Main Methods:

  • A mouse model of chemically induced skin carcinogenesis was utilized.
  • PAR2-deficient and wild-type mice were compared for tumor development over 13 weeks.
  • Signal transduction pathways, including extracellular signal-regulated kinase 1/2 (ERK1/2) and epidermal growth factor receptor (EGFR) transactivation, were analyzed in HaCaT keratinocytes.

Main Results:

  • PAR2-deficient mice developed a significantly higher number of skin tumors (average of 14 per animal) compared to wild-type mice (average of 8 per animal) after 13 weeks.
  • PAR2 stimulation in keratinocytes activated ERK1/2 and EGFR transactivation.
  • This activation led to the secretion of transforming growth factor-beta1 (TGF-β1), a known tumor-suppressing factor.

Conclusions:

  • PAR2 exhibits a tumor-protective role in the development of epidermal skin tumors.
  • PAR2 signaling, through ERK1/2 and EGFR transactivation, promotes the secretion of TGF-β1, contributing to tumor suppression.

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