A novel strategy for corneal endothelial reconstruction with a bioengineered cell sheet

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Ophthalmology

Background:

• Successful integration of cultivated cell grafts is crucial for tissue repair.
• Corneal endothelial cell loss can impair vision and requires effective therapeutic strategies.

Purpose of the Study:

• To develop and evaluate a novel therapeutic method for corneal repair using cultivated human corneal endothelial cell (HCEC) sheets.
• To assess the in vivo integration and feasibility of HCEC sheet transplantation in a rabbit model.

Main Methods:

• Cultivated adult HCEC sheets with uniform orientation were prepared using temperature-modulated detachment from poly(N-isopropylacrylamide) (PNIPAAm)-grafted surfaces.
• The HCEC sheets were delivered with proper polarity to the rabbit corneal posterior surface using a bioadhesive gelatin disc.
• In vivo studies involved clinical observations and histological examinations following transplantation.

Main Results:

• The prepared HCEC sheets exhibited correct morphology and intact barriers.
• The laminated HCEC sheet successfully integrated into the rabbit cornea after the gelatin carrier biodegraded.
• Histological examinations confirmed successful graft integration and tissue repair.

Conclusions:

• The developed method for preparing and transplanting HCEC sheets is feasible for corneal cell therapy.
• This approach shows potential for treating corneal endothelial cell loss and restoring corneal function.
• The study highlights the importance of cellular organization in graft integration for successful tissue repair.