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A Simplified and Efficient Method to Isolate Primary Human Keratinocytes from Adult Skin Tissue
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FYNagling divergent adhesive functions for Fyn in keratinocytes

Sarah E Fenton1, Mitchell F Denning

  • 1Molecular Biology Program, Cardinal Bernardin Cancer Center, Loyola University Chicago, Maywood, IL, USA.

Experimental Dermatology
|July 2, 2014
PubMed

Insights

Fyn kinase has dual roles in keratinocyte (KC) adhesion, promoting it during differentiation but hindering it in cancer. This review proposes hypotheses to unify Fyn's contradictory functions in cell adhesion.

Area of Science:

  • Cell Biology
  • Biochemistry
  • Dermatology

Background:

  • Fyn, a Src family kinase (SFK), exhibits paradoxical roles in keratinocyte (KC) adhesion.
  • Physiological Fyn activation supports KC differentiation and adherens junction formation.
  • Aberrant Fyn activity in cancer is linked to adhesion loss and increased migration.

Purpose of the Study:

  • To reconcile conflicting literature on Fyn's function in KC cell-cell and cell-matrix adhesion.
  • To propose unifying hypotheses for Fyn's diverse roles in keratinocyte adhesion dynamics.
  • To provide testable hypotheses for future research into Fyn's regulatory mechanisms.

Main Methods:

  • Literature review and synthesis of existing research on Fyn kinase.
  • Analysis of Fyn's involvement in various adhesion structures (adherens junctions, focal adhesions, desmosomes, hemidesmosomes).
  • Development of theoretical frameworks to explain Fyn's context-dependent functions.

Main Results:

  • Fyn's activity is context-dependent, influencing different adhesion types.
  • Fyn can both promote and inhibit adhesion complex formation and stability.
  • Fyn's role varies significantly between normal differentiation and oncogenic transformation.

Conclusions:

  • Fyn's seemingly contradictory roles in keratinocyte adhesion can be explained by context-specific mechanisms.
  • Further research is needed to elucidate the precise molecular pathways mediating Fyn's dual functions.
  • Understanding Fyn's regulation is crucial for targeting keratinocyte-related diseases and cancer progression.
Keywords:
Fynadherens junctionadhesiondifferentiationfocal adhesionkeratinocyte

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