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- W2883146272 abstract "The purpose of the current work was to develop a physiologically relevant, in vitro human three-dimensional (3D) corneal epithelial tissue model for use in ophthalmic drug development.Normal human corneal epithelial cells were cultured at the air-liquid interface to produce the 3D corneal tissue model. Corneal barrier was determined by measuring transepithelial electrical resistance (TEER). Quantitative PCR arrays were utilized to investigate expression of 84 phase I/II metabolizing enzymes and 84 drug transporter genes. Permeability was evaluated using model compounds with a wide range of hydrophobicity, molecular weight, and excipients. Finally, different formulations of latanoprost and bimatoprost were administered and drug absorption and tissue viability and integrity were investigated.Histologic assessment and TEER of the corneal tissue model revealed tissue structure, thickness, and barrier formation (1000 ± 146 Ω·cm2) comparable to native human corneal epithelium. The 3D corneal tissue expressed tight junctions, mucins, and key corneal epithelial detoxification enzymes. Drug-metabolizing enzyme and transporter gene expression in 3D corneal tissue and excised human corneal epithelium were highly correlated (r2 = 0.87). Coefficients of permeation for model drugs in the tissue model and excised rabbit corneas also showed a high correlation (r2 = 0.94). As expected, latanoprost and bimatoprost free acids had much lower permeability (Papp = 1.2 × 10-6 and 1.9 × 10-6) than the corresponding prodrugs (Papp = 2.5 × 10-5 and 5.6 × 10-5), respectively. The presence of 0.02% benzalkonium chloride in ophthalmic formulations significantly affected tissue barrier and viability.The newly developed 3D corneal tissue model appears to be very useful for evaluation of corneal drug permeability and safety during ophthalmic drug development." @default.
- W2883146272 created "2018-08-03" @default.
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- W2883146272 date "2018-06-06" @default.
- W2883146272 modified "2023-10-18" @default.
- W2883146272 title "New Human Organotypic Corneal Tissue Model for Ophthalmic Drug Delivery Studies" @default.
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- W2883146272 doi "https://doi.org/10.1167/iovs.18-23944" @default.
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