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Tissue factor expression in human pterygium.

Ryo Ando1, Satoru Kase, Tsutomu Ohashi

  • 1Laboratory of Ocular Cell Biology and Visual Science, Department of Ophthalmology, Hokkaido University Graduate School of Medicine, Sapporo, Japan.

Molecular Vision
|January 20, 2011
PubMed
Summary

Tissue factor (TF) is elevated in pterygium tissue, suggesting its role in the condition

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Area of Science:

  • Ophthalmology
  • Cell Biology
  • Pathology

Background:

  • Pterygium exhibits tumor-like behavior, including proliferation and invasion.
  • Tissue factor (TF) is linked to tumor cell epithelial-mesenchymal transition (EMT) and development.
  • Understanding TF's role in pterygium pathogenesis is crucial.

Purpose of the Study:

  • To investigate TF expression and localization in human pterygium and normal conjunctiva.
  • To explore the relationship between TF, alpha-smooth muscle actin (α-SMA), and epidermal growth factor receptor (EGFR) in pterygium.

Main Methods:

  • Immunohistochemistry was used to analyze TF expression in surgically removed pterygial and conjunctival tissues.
  • Double staining assessed co-localization of TF with α-SMA and EGFR in pterygium epithelium.

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Main Results:

  • TF immunoreactivity was present in all pterygium samples, significantly higher than in normal conjunctiva.
  • TF was found in various pterygium epithelial cell layers and co-localized with EGFR.
  • TF expression was observed in both α-SMA-positive and -negative pterygium epithelial cells.

Conclusions:

  • TF is implicated in pterygium pathogenesis and development.
  • TF may contribute to pterygium development via both EMT-dependent and independent mechanisms.