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Ex Vivo and In Vivo Animal Models for Mechanical and Chemical Injuries of Corneal Epithelium
Published on: April 6, 2022
Influence of substrate on corneal epithelial cell viability within ocular surface models
Yun Feng1, James Foster, Shengli Mi
1School of Pharmacy, University of Reading, United Kingdom.
Experimental Eye Research
|June 12, 2012
Summary
Compressed collagen gels create superior corneal models for research, enhancing cell protection and reducing animal testing. These advanced ocular surface models improve cell stratification and viability compared to traditional methods.
Area of Science:
- Ocular tissue engineering
- Corneal epithelial cell biology
- In vitro model development
Background:
- Corneal tissue engineering advancements enable superior in vitro ocular surface models.
- These models aim to reduce reliance on animal testing for research.
- Understanding substrate effects on corneal cells is crucial for model development.
Purpose of the Study:
- To evaluate the impact of different substrates on corneal epithelial cell viability.
- To determine if substrates mimicking the stromal surface offer better protection against toxins.
- To compare compressed collagen gel with polycarbonate membranes and conventional collagen gels.
Main Methods:
- Human corneal epithelial cells were expanded on three substrates: compressed collagen gel, polycarbonate membrane, and conventional collagen gel.
- Cell stratification, number, and junctional protein expression were assessed over 10 days.
- Epithelial cell viability was quantified using MTT assay after exposure to sodium lauryl sulphate.
Main Results:
- Cells expanded on compressed collagen gel and polycarbonate membranes showed improved stratification, cell number, and tight junction expression compared to conventional collagen gel.
- Significantly higher epithelial cell viability was observed when cells were expanded on compressed collagen gel.
- Compressed collagen gel demonstrated superior protective effects against toxic assault.
Conclusions:
- Compressed collagen gels provide a more robust corneal model due to their naturalistic composition and mechanical properties.
- This substrate enhances corneal epithelial cell health and protective functions in vitro.
- Advanced in vitro models using substrates like compressed collagen gel can potentially reduce animal testing in ocular research.
