Direct epithelial-stromal interaction in corneal wound healing: Role of EMMPRIN/CD147 in MMPs induction and beyond

Prog Retin Eye Res. 2009 Jan;28(1):19-33. doi: 10.1016/j.preteyeres.2008.11.001. Epub 2008 Nov 17.

Abstract

In the cornea, the epithelium and the underlying stroma are separated by the basement membrane and Bowman's layer. The disruption of these anatomical barriers during wound healing represents a key step which initiates tissue remodeling through the modification of the epithelial-stromal interactions (ESI). Diffusible cytokines are generally viewed as central modulators in the bidirectional communication between these epithelial and stromal compartments and their implication in all stages of the wound healing process has been an active area of research for many years. Our studies which aimed to explore mechanisms of matrix degradation in pathological corneal wound healing have shown that EMMPRIN, a glycoprotein expressed on corneal epithelial cell surface, can induce matrix metalloproteinase (MMP) production and myofibroblasts differentiation after direct interaction with corneal fibroblasts. EMMPRIN appears therefore as a potential mediator of ESI by direct cell-cell contact which represents a new mechanism for dysregulated MMPs' induction observed in corneal ulcerations. These direct epithelial-stromal interactions (direct-ESI) can occur when delayed epithelial healing prevents regeneration of the basement membrane and allows the two cell types to come into close proximity. We propose that prevention of these interactions through inhibition of EMMPRIN may represent a promising therapeutic strategy in the inhibition of MMP induction in ulceration.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Basigin / physiology*
  • Cell Communication / physiology*
  • Corneal Stroma / physiology*
  • Epithelium, Corneal / physiology*
  • Humans
  • Matrix Metalloproteinases / biosynthesis*
  • Wound Healing / physiology*

Substances

  • BSG protein, human
  • Bsg protein, mouse
  • Basigin
  • Matrix Metalloproteinases