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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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Tumor necrosis factor receptor 1-mediated signaling is required for skin cancer development induced by NF-kappaB

Maria H Lind1, Björn Rozell, Robert P A Wallin

  • 1Department of Bioscience, Clinical Research Center, Karolinska Institutet, Novum, SE-141 57 Huddinge, Sweden.

Proceedings of the National Academy of Sciences of the United States of America
|March 27, 2004
PubMed

Insights

Inhibiting NF-kappaB signaling in skin promotes inflammation and squamous cell carcinoma (SCC) development. Blocking tumor necrosis factor receptor 1 (Tnfr1) signaling prevents these effects, highlighting Tnfr1

Area of Science:

  • Dermatology
  • Oncology
  • Immunology

Background:

  • NF-kappaB signaling is crucial for skin development and epidermal growth control.
  • Inhibition of NF-kappaB in murine keratinocytes triggers inflammation and squamous cell carcinoma (SCC).

Purpose of the Study:

  • To investigate the role of tumor necrosis factor receptor 1 (Tnfr1) in NF-kappaB-driven skin inflammation and SCC.
  • To elucidate the cellular dependence of Tnfr1-mediated signaling in skin cancer development.

Main Methods:

  • Generation of K5-IkappaBalpha mice and crossing them with Tnfr1-null mice.
  • Analysis of inflammatory and tumorigenic responses in genetically modified mouse models.
  • Bone marrow reconstitution experiments to assess cellular dependence.

Main Results:

  • Crossing K5-IkappaBalpha mice with Tnfr1-null mice blocked both inflammation and SCC development.
  • Mice lacking IL-1 receptor type 1 (Il1r1) still developed inflammation and SCC, confirming specificity.
  • Bone marrow reconstitution with Tnfr1(+/-) bone marrow did not induce the phenotype, indicating Tnfr1 dependence in non-hematopoietic cells.

Conclusions:

  • Local Tnfr1-mediated signaling is critical for driving skin cancer.
  • The inflammatory response, cooperating with repressed NF-kappaB signaling, plays a key role in skin carcinogenesis.

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