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Related Experiment Videos

The extracellular matrix in skin tumor development-a morphological study.

F Stenbäck1, M J Mäkinen, T Jussila

  • 1Department of Pathology, University of Oulu, Finland.

Journal of Cutaneous Pathology
|September 16, 1999
PubMed
Summary

Cancer development involves epithelial-stromal interactions, with collagen changes affecting tumor morphology. This study investigated collagen synthesis and deposition in response to UV irradiation and chemical carcinogens in mouse skin.

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Area of Science:

  • Oncology
  • Dermatology
  • Biochemistry

Background:

  • Epithelial-stromal interactions are crucial in cancer development.
  • Collagen synthesis and deposition alterations correlate with tumor morphology.
  • Ultraviolet (UV) irradiation is a primary cause of skin cancer and dermal degeneration.

Purpose of the Study:

  • To investigate non-neoplastic dermal changes and skin tumors induced by UV irradiation and 7,12-dimethylbenz(a)anthracene in mice.
  • To analyze the role of type I and III collagens in skin carcinogenesis.
  • To understand the stromal response to epithelial tumors.

Main Methods:

  • Utilized various mouse strains with differing tumor susceptibilities.
  • Induced skin carcinogenesis using UVB irradiation and 7,12-dimethylbenz(a)anthracene.

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  • Examined collagen immunoreactivity, synthesis, and deposition in dermal and tumor tissues.

    • Main Results:

    • UVB irradiation increased dermal collagen immunoreactivity compared to 7,12-dimethylbenz(a)anthracene.
    • Increased type I and III collagen synthesis and deposition were observed adjacent to benign and well-differentiated squamous cell carcinomas.
    • Fibrillary structure destruction intensified with decreased tumor differentiation; anaplastic carcinomas showed abnormal collagen mRNA expression.

    Conclusions:

    • The stroma reacts reproducibly to epithelial tumor development, influenced by the carcinogenic agent.
    • Collagen alterations are linked to skin tumor progression and differentiation status.
    • Understanding these interactions can inform cancer research and therapeutic strategies.