Synthetic vs natural scaffolds for human limbal stem cells

Area of Science:

• Biomaterials Science
• Ophthalmology
• Tissue Engineering

Background:

• Investigating synthetic nanoscaffolds for ocular surface reconstruction.
• Comparing poly(urethane) (PU) and poly(caprolactone) (PCL) nanoscaffolds with natural materials like fibrin and human amniotic membrane.
• Evaluating the effect of hydrolytic surface modification on scaffold performance.

Purpose of the Study:

• To assess the viability and differentiation of human eye epithelial cells cultured on modified and unmodified synthetic nanoscaffolds.
• To compare the performance of synthetic nanoscaffolds against natural scaffolds for ocular cell culture.
• To determine the suitability of these scaffolds for therapeutic applications.

Main Methods:

• Fabrication of PU and PCL nanoscaffolds via electrospinning.
• Isolation and culture of human limbal epithelial cells.
• Surface modification of nanoscaffolds using NaOH treatment.
• Assessment of cell viability and immunofluorescence analysis for stem cell marker p63.

Main Results:

• All tested scaffolds supported good colony spreading of limbal cells.
• Tissue culture plastic demonstrated the highest cell viability.
• Electrospun PU, PCL, and NaOH-treated PCL scaffolds showed >80% p63-positive cells, indicating stem cell differentiation, compared to 27% on fibrin.

Conclusions:

• Natural scaffolds (fibrin, amniotic membrane) exhibited superior cell viability.
• Synthetic nanoscaffolds, particularly PU and PCL, demonstrated high expression of the stem cell marker p63, suggesting potential for therapeutic delivery.
• Surface modification may enhance the properties of synthetic scaffolds for ocular cell applications.