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Related Experiment Video

Updated: Aug 5, 2025

Ex Vivo Corneal Organ Culture Model for Wound Healing Studies
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Collagen XII regulates stromal wound closure.

Christopher Donovan1, Devon Cogswell1, Mei Sun1

  • 1From the Cornea, External Disease Service, Department of Ophthalmology, USA.

Experimental Eye Research
|March 26, 2023
PubMed
Summary

Collagen XII is crucial for corneal wound healing, regulating closure and matrix deposition. Its absence impairs the healing process, highlighting its translational value in treating eye injuries.

Keywords:
Collagen XIIFibroblastsRegenerationStromaWound

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Area of Science:

  • Ophthalmology
  • Biomaterials Science
  • Tissue Engineering

Background:

  • The function of collagen XII in corneal wound repair remains largely uncharacterized.
  • Understanding extracellular matrix components is vital for improving corneal healing outcomes.

Purpose of the Study:

  • To investigate the role of collagen XII in the repair of incisional and debridement corneal injuries.
  • To elucidate the mechanisms by which collagen XII influences corneal wound healing and scar formation.

Main Methods:

  • Utilized a mouse model with wild-type and collagen XII-deficient (Col12a1-/-) corneas.
  • Induced incisional and debridement injuries, analyzing repair using clinical photography, immunohistology, second harmonic generation imaging, and electron microscopy.
  • Conducted in vitro studies to assess interactions with fibronectin and latent transforming growth factor β binding protein 1 (LTBP1).

Main Results:

  • Collagen XII deficiency significantly retarded wound closure and the overall healing process in incisional injuries.
  • Absence of collagen XII altered fibrillogenesis, CD68+ cell infiltration, and myofibroblast survival.
  • In vitro findings suggest collagen XII interacts with fibronectin and LTBP1 to regulate provisional matrix deposition.

Conclusions:

  • Collagen XII is a key regulator of corneal incisional wound repair.
  • This study demonstrates collagen XII's role in matrix deposition and cellular infiltration during healing.
  • Findings have significant translational implications for developing therapies for corneal injuries.