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KMID : 1137820190400050143
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의공학회지
2019 Volume.40 No. 5 p.143 ~ p.150
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Fabrication of Ex vivo Cornea Model for a Drug Toxicity Evaluation
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Kim Seon-Hwa
Park Sang-Hyug
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Abstract
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To evaluate the toxicity of ophthalmic drug, the Draize test and Bovine Corneal Opacity and Permeability (BCOP) test commonly used. In Draize test, experimental animals were under stress and pain due to long-term exposure of drug. In addition, regarding physiological functions, animal model is not perfectly reflected a human eye condition. Although some models such as EpiOcularTM, HCE model, LabCyte Cornea-Model, and MCTT HCETM were already presented advanced cornea ex-vivo model to replace animal test. In this sense, cornea tissue structure mimicked ex-vivo toxicity model was fabricated in this study. The corneal epithelial cells (CECs) and keratocytes (CKs) isolated from rabbit eyeball were seeded on non-patterned silk film (n-pSF) and patterned silk film (pSF) at 32,500 cells/cm2 and 6,500 cells/cm2. Sequentially, n-pSF and pSF were stacked to mimic a multi-layered stroma structure. The thickness of films was about 15.63 μm and the distance of patterns was about 3 μm. H&E stain was performed to confirm the cell proliferation on silk film. F-actin of CKs was also stained with Phalloidin to observe the cytoskeletal alignment along with patterns of the pSF. In the results, CECs and CKs were shown the good cell attachment on the n-pSF and pSFs. Proliferated cells expressed the specific phenotype of cornea epithelium and stroma. In conclusion, we successfully established the ex-vivo cornea toxicity model to replace the eye irritation tests. In further study, we will set up the human ex-vivo cornea toxicity model and then will evaluate the drug screening efficacy.
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KEYWORD
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Eye irritation animal test, Tissue engineered cornea, Ex-vivo toxicity model, Bio fabrication
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