Early and late-onset cell migration from peripheral corneal endothelium

Area of Science:

• Ophthalmology
• Cell Biology
• Regenerative Medicine

Background:

• Corneal endothelial dysfunction is a leading cause of vision impairment.
• Understanding corneal endothelial cell (CEC) migration is crucial for developing regenerative therapies.
• Rho-associated coiled-coil containing protein kinase (ROCK) inhibitors are explored for their effects on cell behavior.

Purpose of the Study:

• To investigate peripheral corneal endothelial cell migration in vitro.
• To assess the influence of a ROCK-inhibitor on CEC migration and morphology.
• To characterize distinct migrating CEC populations and their potential implications for regenerative treatments.

Main Methods:

• Cultured 21 corneal endothelial graft rims with attached trabecular meshwork (TM) in a hydrogel matrix.
• Compared CEC migration in the absence and presence of a ROCK-inhibitor for up to 46 days.
• Assessed cell viability and expression of endothelial cell markers (ZO-1, Na+/K+-ATPase, NCAM, glypican, vimentin) post-culture.

Main Results:

• All cultured CECs remained viable and exhibited migration, forming single regions or collective areas.
• Migration initiated within 4 days and continued for at least 29 days, irrespective of ROCK-inhibitor presence.
• ROCK-inhibitor appeared to promote more regular cell morphology; a distinct late-onset, proliferative cell population emerged near the limbus.

Conclusions:

• Two distinct CEC migration patterns were observed: barrier-induced and a late-onset, highly proliferative type.
• The late-onset cell population's emergence may be influenced by factors beyond contact inhibition and ROCK-inhibition.
• Further research into these distinct CEC subpopulations could optimize regenerative strategies for corneal endothelial diseases.