Journal
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
Volume 136, Issue -, Pages 164-173Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ejpb.2019.01.023
Keywords
Ocular irritancy; Drug absorption; In vitro cornea model; QobuR; TEER measurement; Barrier disruptions; Alternative method
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Funding
- Government of Principado de Asturias - European Regional Development Fund (FEDER) [FC-15-GRUPIN14-141]
- Government of Principado de Asturias [NNOVA-IDEPA-IDE-2016-000215]
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A new in vitro human corneal epithelial model (QobuR) obtained from normal limbal tissue has been developed to study ocular irritancy of different ophthalmic compounded drugs. Phenotypical characterization and transepithelial electrical resistance (TEER) of QobuR revealed essential similarities compared with a native human cornea, displaying functional markers and TEER values near 1500 Omega cm(2) at day 7th of cellular differentiation. Using this model, ocular irritancy and barrier integrity alterations were evaluated using MTT reaction and variations in TEER. We found that some of the Non-Irritant products evaluated still damage the corneal epithelial integrity and current protocols for ocular irritancy should therefore include a barrier integrity evaluation. Moreover, in order to comprehensively evaluate corneal permeability of the active ingredients, we propose the use of QobuR as an all-in-one alternative method for evaluating ocular irritancy, barrier disruptions and permeability rates of topically applied ocular drugs to improve current in vitro drug testing procedures.
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