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Characterization of Tunable Poly-ε-Lysine-Based Hydrogels for Corneal Tissue Engineering.

Rebecca Lace1, Georgia L Duffy1, Andrew G Gallagher2

  • 1Department of Eye and Vision Science, Institute of Life Course and Medical Science, University of Liverpool, Liverpool, L7 8TX, UK.

Macromolecular Bioscience
|May 6, 2021
PubMed
Summary

Poly-ε-lysine hydrogels offer tunable properties for corneal tissue engineering. These synthetic materials show promise as corneal replacements, supporting cell growth and integration.

Keywords:
characterizationcorneahydrogelocular surfacepoly-lysine

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Ophthalmology

Background:

  • Corneal transplantation faces donor shortages and risks like rejection and infection.
  • Synthetic alternatives are needed for corneal grafts and partial replacements.
  • Poly-ε-lysine hydrogels present a potential solution for corneal tissue engineering.

Purpose of the Study:

  • To synthesize and characterize poly-ε-lysine hydrogels for corneal applications.
  • To investigate methods for tuning hydrogel properties like mechanical strength, transparency, and water content.
  • To assess the biocompatibility of these hydrogels with corneal cells.

Main Methods:

  • Poly-ε-lysine hydrogels synthesized via carbodiimide crosslinking with bis-carboxylic acids.
  • Hydrogels fabricated using both cast and fragmented methods to control porosity.
  • Characterization of mechanical properties, transparency, and water content.
  • Assessment of corneal epithelial and stromal cell attachment, growth, and integration.

Main Results:

  • Tunable mechanical properties, transparency, and water content achieved through synthesis methods.
  • Fragmented method introduced increased porosity.
  • Hydrogels demonstrated properties similar to human cornea.
  • Supported attachment, growth, and integration of corneal epithelial and stromal cells.

Conclusions:

  • Poly-ε-lysine hydrogels can be synthesized with tunable characteristics for corneal tissue engineering.
  • These hydrogels show potential as synthetic corneal grafts, mimicking native tissue properties.
  • The materials support corneal cell functions, indicating promise for regenerative medicine applications.