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Related Experiment Video

Updated: Aug 17, 2025

Eye Irritation Test EIT for Hazard Identification of Eye Irritating Chemicals using Reconstructed Human Cornea-like Epithelial RhCE Tissue Model
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Tissue Engineered Mini-Cornea Model for Eye Irritation Test.

Seon-Hwa Kim1,2, Sung-Han Jo1,2, Byeong Kook Kim1,2

  • 1New-Senior Oriented Smart Health Care Education Center (BK21 Plus), Pukyong National University, Busan, Republic of Korea.

Tissue Engineering and Regenerative Medicine
|December 11, 2022
PubMed
Summary
This summary is machine-generated.

This study developed an in vitro mini-cornea model using human cells for eye irritation testing. The model showed varying viability based on chemical irritancy, offering a promising alternative to animal testing.

Keywords:
Ascorbic acidEye irritationIn vitro cornea modelTissue engineering

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Area of Science:

  • Ophthalmology
  • Toxicology
  • Tissue Engineering

Background:

  • Traditional animal testing for eye irritation faces challenges including subjectivity, interspecies differences, and ethical concerns.
  • Alternative testing methods are actively being researched to address these limitations.
  • In vitro models offer a potential solution for more reliable and ethical eye irritation assessments.

Purpose of the Study:

  • To fabricate and validate an in vitro mini-cornea model using immortalized human corneal epithelial cells (iHCECs) and keratocytes (iHCKs).
  • To evaluate the model's efficacy in distinguishing between chemical irritancy levels.
  • To propose this model as a viable alternative to animal-based eye irritation tests.

Main Methods:

  • Characterization of iHCECs and iHCKs using cornea-specific markers via immunocytochemistry and western blot.
  • Fabrication of a 3D hemisphere construct using iHCKs cultured under modified conditions with ascorbic acid to promote matrix and collagen formation.
  • Seeding iHCECs onto the construct and culturing at an air-liquid interface, followed by exposure to various test chemicals.

Main Results:

  • The fabricated mini-cornea model exhibited a hemisphere shape with homogenous cell distribution and expressed specific cell markers.
  • The model demonstrated differential sensitivity to various chemicals, with viability decreasing significantly as chemical concentration increased.
  • Histological analysis confirmed the structural integrity and cellular organization of the engineered tissue.

Conclusions:

  • The developed tissue-engineered mini-cornea model successfully performed irritation tests.
  • The model showed distinct viability responses to chemicals with varying irritancy levels.
  • This in vitro model presents a promising alternative approach to conventional animal testing for eye irritation.