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Related Experiment Videos

Expression and function of the keratinocyte integrins

F M Watt1, P H Jones

  • 1Keratinocyte Laboratory, Imperial Cancer Research Fund, London, UK.

Development (Cambridge, England). Supplement
|January 1, 1993
PubMed
Summary

Human keratinocytes utilize integrin receptors for cell adhesion and differentiation. Their expression patterns change in conditions like wound healing and cancer, impacting cell behavior and stratification.

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Area of Science:

  • Dermatology
  • Cell Biology
  • Molecular Biology

Background:

  • Human keratinocytes express integrin receptors, crucial for cell adhesion.
  • Integrin expression is typically localized to the basal layer of the epidermis.
  • Aberrant integrin expression is linked to skin conditions like psoriasis and squamous cell carcinoma.

Purpose of the Study:

  • To investigate the role of integrin expression and function in keratinocyte biology.
  • To understand how integrin regulation impacts epidermal development and disease.
  • To identify distinct keratinocyte subpopulations based on integrin profiles.

Main Methods:

  • Analysis of integrin expression patterns in normal and diseased human epidermis.
  • Studies using cultured keratinocytes to assess integrin function.
  • Investigating transcriptional and post-translational regulation of integrins.
  • Characterizing ligand binding modulation independent of expression levels.

Main Results:

  • Integrin expression patterns are altered in wound healing, psoriasis, and squamous cell carcinoma.
  • Cultured keratinocytes demonstrate integrin roles in matrix adhesion, cell-cell adhesion, stratification, migration, and differentiation.
  • Three basal keratinocyte subpopulations (stem, transit amplifying, differentiating) are distinguishable by integrin expression and function.

Conclusions:

  • Integrins play multifaceted roles in keratinocyte adhesion, migration, and differentiation.
  • Modulation of integrin expression and function is critical in epidermal homeostasis and disease pathogenesis.
  • Integrin-based characterization can define distinct keratinocyte stem and progenitor cell populations.

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