Descemet Membrane Versus Amniotic Membrane for Limbal Stem Cell Therapy

Area of Science:

• Ophthalmology
• Regenerative Medicine
• Biomaterials Science

Background:

• Limbal epithelial stem cells (LESCs) are crucial for corneal regeneration.
• Current therapies often use amniotic membrane (AM) as a scaffold.
• Alternative scaffolds are needed to improve outcomes in limbal stem cell therapy.

Purpose of the Study:

• To compare biomarker expression and proliferation of LESCs cultured on Descemet membrane (DM) versus AM.
• To evaluate DM's suitability as a long-term scaffold for cultivated LESC transplantation.
• To assess DM's potential as an alternative to AM in ocular surface reconstruction.

Main Methods:

• Cultured donor limbal epithelial cells on decellularized DM and AM.
• Assessed LESC biomarker expression (ABCG2, ABCB5, p63α) via In-Cell Western and immunocytochemistry.
• Evaluated cell proliferation using BrdU incorporation and analyzed stratified growth via airlift organ cultures and 3D immunofluorescence.
• Assessed scaffold transparency and collagenase resistance.

Main Results:

• DM maintained LESC stemness better than AM, showing higher LESC marker expression and lower proliferation rates.
• Cells on DM formed stratified epithelia with differentiation, maintaining basal LESC markers.
• DM exhibited superior transparency and collagenase resistance compared to AM.

Conclusions:

• Descemet membrane (DM) promotes limbal epithelial stem cell (LESC) stemness more effectively than amniotic membrane (AM) in ex vivo culture.
• DM supports stratified corneal epithelial growth and possesses favorable transparency and durability characteristics.
• DM represents a promising alternative scaffold for limbal stem cell therapy, potentially enhancing ocular surface regeneration.