Polyurethanes as potential substrates for sub-retinal retinal pigment epithelial cell transplantation

Area of Science:

• Biomaterials Science
• Ophthalmology
• Tissue Engineering

Background:

• Age-related macular degeneration (AMD) is a leading cause of vision loss.
• Transplantation of cultured retinal pigment epithelial (RPE) cells is a potential therapeutic strategy for AMD.
• Identifying suitable biocompatible substrates for RPE cell culture and transplantation is critical.

Purpose of the Study:

• To evaluate the suitability of specific polyurethane materials for supporting retinal pigment epithelial (RPE) cell growth.
• To assess the impact of surface modification on RPE cell adhesion and proliferation on polyurethanes.

Main Methods:

• Evaluation of three polyether urethanes (Pellethane, Tecoflex, Zytar) for wettability and RPE cell support.
• Dynamic contact angle analysis to measure surface wettability.
• Assessment of ARPE-19 cell growth and morphology on untreated and air plasma-treated polyurethane surfaces.

Main Results:

• Zytar supported RPE cell confluence without modification.
• Pellethane and Tecoflex showed limited RPE cell adhesion initially.
• Air plasma treatment enhanced wettability and promoted confluent monolayers of well-spread RPE cells on Pellethane and Tecoflex.

Conclusions:

• Polyurethane materials, particularly when surface-modified via air plasma treatment, demonstrate significant potential as substrates for culturing functional retinal pigment epithelial (RPE) cells.
• These findings support the development of polyurethane-based scaffolds for RPE cell transplantation therapies in treating age-related macular degeneration.