Journal
OCULAR IMMUNOLOGY AND INFLAMMATION
Volume 30, Issue 7-8, Pages 1945-1955Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/09273948.2021.1957124
Keywords
Ocular surface; dry eye; inflammation; eye drops; cyclosporin A; cationic emulsion
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The cationic oil-in-water emulsion of CsA shows potential in improving signs and symptoms of dry eye disease without delaying wound healing or causing ocular toxicity. This drug delivery system has the ability to significantly impact the performance of eye drops and play an important role in the treatment of dry eye disease.
Background Cyclosporine A (CsA) has been used as a topical treatment for various ocular surface diseases including dry eye disease (DED). Several CsA formulations are available as solutions or emulsions. Purpose This review describes the development and the preclinical testing of a cationic oil-in-water emulsion of CsA (CE-CsA) in terms of pharmacodynamics, pharmacokinetics, and ocular tolerance. Due to the cationic charge, CE electrostatically interacts with the negatively-charged ocular surface, improving its residence time. Compared to other CsA formulations, CE-CsA and CE itself were found to reduce the signs and symptoms of DED, by restoring tear film stability and properties, and inhibiting the expression and secretion of pro-inflammatory factors. No delay in wound healing nor ocular toxicity were observed using CE formulations. Conclusion these findings indicate that the type of vehicle can significantly affect the performance of eye drops and play an ancillary role in DED treatment. CE appears as a promising strategy to deliver drugs to the ocular surface while maintaining its homeostasis.
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