Caveolin-1 as a novel indicator of wound-healing capacity in aged human corneal epithelium

Mol Med. 2010 Nov-Dec;16(11-12):527-34. doi: 10.2119/molmed.2010.00046. Epub 2010 Jul 14.

Abstract

Excess caveolin-1 has been reported to play a role in age-dependent hyporesponsiveness to growth factors in vitro. Therefore, we hypothesized that caveolin-1-dependent hyporesponsiveness to growth factors in aged corneal epithelial cells might be responsible for delayed wound healing in vivo. To test this hypothesis, we evaluated corneal wound-healing time by vital staining using fluorescein after laser epithelial keratomileusis (LASEK). We compared wound-healing times in young, middle-aged and elderly patients. We also examined caveolin-1 levels and other aging markers, such as p53 and p21, in the corneal epithelium. Elderly patients generally had higher caveolin-1 levels in the corneal epithelia than young patients. There were, however, variations among individuals with increased caveolin-1 in some young patients and decreased levels in some elderly patients. Wound-healing time after LASEK correlated well with the corneal caveolin-1 status. Therefore, we suggest that caveolin-1 status might be responsible for delayed wound healing in elderly patients after LASEK. Caveolin-1 status might be a regulator for wound-healing capacity and a novel target for in vivo adjustment.

Publication types

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

MeSH terms

  • Adult
  • Age Factors
  • Aged
  • Biomarkers
  • Caveolin 1 / metabolism*
  • Cells, Cultured
  • Epidermal Growth Factor / metabolism
  • Epithelium, Corneal / metabolism*
  • Female
  • Humans
  • Keratectomy, Subepithelial, Laser-Assisted
  • Male
  • Middle Aged
  • Paxillin / metabolism
  • Recombinant Proteins / therapeutic use
  • Tears / chemistry
  • Wound Healing*
  • Young Adult

Substances

  • Biomarkers
  • Caveolin 1
  • Paxillin
  • Recombinant Proteins
  • Epidermal Growth Factor