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Microstructured collagen films for 3D corneal stroma modelling.

Juha Prittinen1, Xin Zhou1, Fouzia Bano2,3

  • 1Department of Integrative Medical Biology, Umeå University, Umeå, Sweden.

Connective Tissue Research
|December 13, 2021
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Summary

Researchers developed a novel collagen film culture system to mimic the corneal stroma, improving cell viability and preserving keratocyte phenotype for studying corneal healing.

Keywords:
Vitrigelcollagencorneakeratocytestroma

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Area of Science:

  • Ophthalmology
  • Biomaterials Science
  • Cell Biology

Background:

  • Corneal injury significantly impacts global vision.
  • The corneal stroma's structure is crucial for cell behavior during healing.
  • Existing culture systems often fail to replicate the natural corneal environment.

Purpose of the Study:

  • To develop a biomimetic culture system for studying corneal healing.
  • To create a system that mimics the native corneal stroma's microenvironment.
  • To investigate the effect of microstructured films on corneal cell phenotype and behavior.

Main Methods:

  • Fabrication of thin, microgrooved collagen films via vitrification.
  • Culture of keratocytes, fibroblasts, and myofibroblasts on 2D and 3D film constructs.
  • Analysis of cell orientation, viability, and phenotype using SEM, F-actin staining, MTS, and live/dead assays.

Main Results:

  • A microstructured collagen film system successfully guided keratocytes to their native orientation.
  • The system supported cell viability in both 2D and 3D cultures.
  • The films demonstrated the ability to maintain fibroblast and myofibroblast phenotypes.

Conclusions:

  • The developed films offer a reproducible corneal stroma model.
  • High cell viability was maintained within the culture system.
  • The system effectively preserved the keratocyte phenotype, even upon differentiation into fibroblasts.