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Related Experiment Video

Updated: Sep 28, 2025

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Scaffold-Free Strategy Using a PEG-Dextran Aqueous Two-Phase-System for Corneal Tissue Repair.

Lap Tak Hung1, Stephanie Hiu Ling Poon2, Wing Huen Yan2

  • 1Department of Mechanical Engineering, Faculty of Engineering, University of Hong Kong, Rm 7-25, Haking Wong Building, Pokfulam Road, Hong Kong SAR 999077, China.

ACS Biomaterials Science & Engineering
|April 1, 2022
PubMed
Summary

This study presents a new method for rapidly creating scaffold-free corneal tissue using an aqueous two-phase system (ATPS). This technique shows promise for corneal repair applications.

Keywords:
corneaophthalmologyscaffold freetissue engineeringwound healing

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Ophthalmology

Background:

  • Scaffold-free tissue constructs are crucial for tissue engineering, minimizing extracellular matrix is key.
  • Corneal tissue engineering requires efficient methods for fabricating functional corneal constructs.

Purpose of the Study:

  • To develop and optimize a rapid fabrication strategy for scaffold-free corneal tissue constructs.
  • To utilize an aqueous two-phase system (ATPS) for creating corneal tissue.
  • To assess the viability, functionality, and potential for corneal repair of the fabricated constructs.

Main Methods:

  • Fabrication of corneal tissue constructs using the liquid-liquid interface of an aqueous two-phase system (ATPS) composed of dextran and polyethylene glycol.
  • Assessment of cell viability, proliferation, and expression of physiological markers in the constructs.
  • In vitro testing of corneal epithelial cell constructs for wound re-epithelialization.

Main Results:

  • Intact, scaffold-free corneal epithelial and endothelial cell constructs were formed within hours at the ATPS interface.
  • The constructs exhibited preserved cell viability and proliferative ability in vitro.
  • Corneal epithelial cell constructs demonstrated successful in vitro re-epithelialization of corneal wounds.

Conclusions:

  • The developed ATPS-based strategy enables rapid fabrication of functional, scaffold-free corneal tissue constructs.
  • The constructs possess essential physiological markers and maintain cell viability and proliferative capacity.
  • This method holds significant promise for advancing corneal repair strategies.