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Engineered Basement Membranes for Regenerating the Corneal Endothelium
Rachelle N Palchesko1,2, James L Funderburgh2,3, Adam W Feinberg1,2,4
1Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA, 15213, USA.
Advanced Healthcare Materials
|October 11, 2016
Summary
Researchers engineered a basement membrane (EBM) to repair corneal tissue. This biomaterial supports corneal endothelial cell growth, offering a potential solution for vision loss caused by endothelial failure.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Ophthalmology
Background:
- Basement membranes are crucial for tissue structure and function.
- Aging and disease alter basement membranes, necessitating repair strategies.
- Corneal endothelial failure causes vision loss, highlighting a clinical need.
Purpose of the Study:
- To develop an engineered basement membrane (EBM) for corneal tissue regeneration.
- To create an EBM that mimics the native Descemet's membrane structure.
- To assess the EBM's potential as a scaffold for corneal endothelium grafts.
Main Methods:
- Fabrication of EBM using surface-initiated assembly of collagen IV and/or laminin on a collagen I film.
- Conformal attachment of the EBM to a collagen I film, creating a thin stromal layer.
- Seeding and culturing of bovine and human corneal endothelial cells on the EBM.
Main Results:
- Engineered basement membranes (EBMs) were successfully fabricated with a thickness of approximately 5-10 nm.
- Corneal endothelial cells formed confluent monolayers on the EBM, expressing ZO-1 at cell borders.
- High cell densities (≈1600 cells mm⁻²) were achieved and maintained for 14-28 days.
Conclusions:
- The developed EBM mimics native basement membrane properties.
- The EBM serves as a suitable scaffold for engineering corneal endothelium grafts.
- This approach shows promise for creating transplant-quality corneal tissue for lamellar keratoplasty.
