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Alginate in corneal tissue engineering.

Anastassia Kostenko1, Stephen Swioklo2, Che J Connon1

  • 1Biosciences Institute, Newcastle University, Newcastle upon Tyne, United Kingdom.

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Summary

Alginate hydrogels show promise as artificial corneal scaffolds and drug delivery systems, addressing limitations of traditional corneal transplants and aiding corneal regeneration for vision impairment.

Keywords:
alginatecomposite scaffoldscorneadrug delivery approachesnanoparticlesregenerative medicinetissue engineering

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Area of Science:

  • Biomaterials Science
  • Ophthalmology
  • Tissue Engineering

Background:

  • Corneal blindness is a significant cause of vision impairment globally, with allograft corneal transplantation being the primary treatment.
  • Transplant limitations include rejection, infection, and unsuitability for certain patient groups, creating a demand-supply gap for donor tissue.
  • Alternative strategies, including artificial corneal substitutes, are crucial for addressing these challenges.

Purpose of the Study:

  • To review the application of alginate in corneal tissue engineering and drug delivery.
  • To explore alginate's potential as a bioinspired scaffold for corneal regeneration and as a carrier for ocular therapeutics.
  • To discuss alginate-based biofabrication techniques and cell encapsulation for corneal therapy.

Main Methods:

  • Literature review focusing on alginate's properties and applications in corneal tissue engineering and drug delivery.
  • Comparison of biofabrication techniques: gel casting, electrospinning, and bioprinting for creating corneal substitutes.
  • Discussion of alginate's role in cell and tissue encapsulation for storage and transport in cell-based therapies.

Main Results:

  • Alginate hydrogels mimic native corneal tissue's water content, offering a suitable scaffold.
  • Alginate exhibits beneficial drug delivery properties, including mucoadhesiveness and penetration enhancement.
  • Various biofabrication methods can create alginate-based corneal tissue precursors and substitutes.

Conclusions:

  • Alginate presents a promising biomaterial for developing artificial corneal substitutes and advanced drug delivery systems.
  • Its properties support corneal regeneration and enhance therapeutic efficacy for treating corneal blindness.
  • Alginate facilitates cell encapsulation, expanding the potential of cell-based therapies for vision restoration.