Human corneal fibroblast migration and extracellular matrix synthesis during stromal repair: Role played by...

Area of Science:

• Ophthalmology
• Regenerative Medicine
• Tissue Engineering

Background:

• Corneal transparency restoration after injury is crucial.
• Fibrosis during corneal wound healing impairs vision.
• Growth factors (GFs) influence extracellular matrix (ECM) production and cell migration in corneal fibroblasts.

Purpose of the Study:

• To investigate the effects of basic fibroblast GF (bFGF), platelet-derived GF (PDGF-BB), and transforming GF-β1 (TGFβ1) on human corneal fibroblast (HCF) ECM protein expression and cellular migration in an in vitro mechanical wound model.
• To understand the role of GFs in human corneal repair and identify potential therapeutic targets for non-fibrotic healing.

Main Methods:

• Development of an in vitro mechanical wound model using human corneal fibroblasts (HCFs).
• Treatment of HCFs with bFGF, PDGF-BB, and TGFβ1.
• Analysis of ECM protein expression (collagen types I and III, perlecan), cell migration, and focal adhesion dynamics.

Main Results:

• Mechanical wounding induced autocrine release of bFGF and TGFβ1.
• PDGF-BB promoted rapid wound closure via enhanced cell migration and non-fibrotic ECM production.
• bFGF stimulated non-fibrotic ECM production while limiting migration.
• TGFβ1 induced fibrotic markers (collagen type III, α5β1 integrin) and inhibited cell migration by forming stable focal adhesions.

Conclusions:

• The in vitro HCF mechanical wound model effectively simulates corneal repair processes.
• PDGF-BB shows potential for promoting non-fibrotic corneal healing.
• TGFβ1 is identified as a key mediator of corneal fibrosis.
• This model can be utilized to evaluate treatments for improving corneal wound healing and preventing fibrosis.