Amnion-assisted conjunctival epithelial redirection in limbal stem cell grafting

Area of Science:

• Ophthalmology
• Regenerative Medicine
• Tissue Engineering

Background:

• Limbal stem cell deficiency (LSCD) requires ocular surface reconstruction.
• Current methods like sequential sector conjunctival epitheliectomy (SSCE) can be invasive and require multiple interventions.
• Preventing conjunctival epithelial cell admixture is crucial for successful corneal epithelialization.

Purpose of the Study:

• To develop and evaluate a novel amniotic membrane (AM)-based technique, termed amnion-assisted conjunctival epithelial redirection (ACER), for limbal stem cell transplantation.
• To compare the efficacy and patient outcomes of ACER with the conventional SSCE method.

Main Methods:

• A retrospective study of 26 patients with total LSCD undergoing limbal stem cell transplantation.
• Group A (11 patients) underwent ACER, utilizing AM to guide conjunctival cells away from the cornea.
• Group B (15 patients) underwent SSCE to prevent conjunctival epithelial migration.

Main Results:

• ACER successfully directed conjunctival epithelium onto the AM in 9 eyes, preventing admixture with limbal explant-derived cells.
• Patients in Group B (SSCE) required 2-4 interventions for re-epithelialization, with 12 reporting pain/discomfort and 11 experiencing conjunctival hemorrhage.
• Corneal epithelialization from limbal explant-derived cells was achieved in all patients across both groups.

Conclusions:

• Amnion-assisted conjunctival epithelial redirection (ACER) is a viable and effective technique for limbal stem cell transplantation.
• ACER significantly reduces the need for multiple patient visits, bleeding, and pain compared to SSCE.
• This AM-based approach offers a less invasive and more patient-friendly alternative for ocular surface reconstruction in LSCD.