The transfer of ocular cells using collagen

Area of Science:

• Biomaterials Science
• Cell Biology
• Ophthalmology

Background:

• Retinal pigment epithelium (RPE) cell transplantation is a promising strategy for treating retinal diseases.
• Efficient and safe delivery of RPE cells to the target site is critical for therapeutic success.
• Collagen, a natural biomaterial, offers potential as a scaffold for cell delivery.

Purpose of the Study:

• To evaluate collagen gel as a vehicle for human retinal pigment epithelium (ARPE19) cell transfer.
• To assess the viability and proliferative capacity of ARPE19 cells within collagen gel.
• To investigate the behavior of ARPE19 cells in collagen gel after transplantation in a rabbit eye model.

Main Methods:

• Preparation of collagen gel (2.0 mg/ml) loaded with ARPE19 cells (10,000 cells/ml).
• Assessment of cell viability using MTT assay.
• Identification of collagen and cell proliferation using van Gieson stain and PCNA staining.
• Evaluation of cell migration on tissue culture plastic and intravitreal injection in rabbits.

Main Results:

• ARPE19 cells maintained healthy morphology and viability in collagen gel.
• Optimal collagen concentration determined to be 1.9 mg/ml.
• Cells in gel exhibited growth rates comparable to cells on plastic for up to 12 days.
• Progressive cell migration observed after transferring cell-loaded gels to plastic.
• Intravitreally injected ARPE19 cells remained viable and proliferated (PCNA positive) in the rabbit vitreous.

Conclusions:

• Collagen gel serves as a viable tool for cellular matrix transfer, particularly for retinal pigment epithelium cells.
• Successful transplantation requires careful balancing of cell seeding density and collagen gel concentration.
• ARPE19 cells demonstrate proliferative capacity after delivery via collagen gel in vivo.