Abstract
Background
Gatifloxacin and moxifloxacin ophthalmic solutions are frequently prescribed for antimicrobial prophylaxis following cataract and corneal refractive surgeries, although the use of topical antibiotics is likely to interfere with wound healing in the immediate postoperative period. A potential factor that may influence rates of wound healing or corneal re-epithelialization is how the solutions are preserved. Gatifloxacin is preserved with 0.005% benzalkonium chloride, whereas moxifloxacin is unpreserved. The purpose of this study was to evaluate the effects of commercially prepared topical gatifloxacin and moxifloxacin on corneal re-epithelialization in rabbit eyes.
Methods
In this randomized, prospective, controlled study, 17 New Zealand white rabbits underwent bilateral corneal de-epithelialization procedures using 20% alcohol contained within a 6 mm trephine. Postoperatively, eyes were randomly assigned to receive either gatifloxacin 0.3%, moxifloxacin 0.5%, or balanced salt solution (BSS) four times daily. Each 6 hours during the first 2 days, and every 12 hours thereafter slit-lamp measurements and corneal photography were performed, enabling de-epithelialized surface areas to be calculated via EPCO 2000 computer analysis.
Results
Gatifloxacin (n = 12) and moxifloxacin (n = 13) treated eyes had a statistically significant (p = 0.036) delay in epithelial healing relative to controls (BSS, n = 8). Healing rates of gatifloxacin and moxifloxacin treated eyes were not significantly different (p = 0.545).
Conclusions
We found no significant difference in re-epithelialization rates following topical application of gatifloxacin 0.3% and moxifloxacin 0.5%. Both antibiotic solutions delayed healing compared to BSS. Our analysis suggests that there was no apparent added epithelial toxicity due to the presence of BAK in the gatifloxacin preparation.
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Acknowledgements
Clinton J. Thompson, Mstat, from the Department of Family & Preventive Medicine, University of Utah, provided assistance with the statistical analyses.
Gamal Saleh, MS, from the Moran Eye Center, University of Utah, assisted with the examinations of study subjects.
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Supported in part by a grant to the Department of Ophthalmology at the University of Utah, Salt Lake City, UT, USA from an unrestricted educational grant from Allergan Inc., P.O. Box 19534, Irvine, CA 92623 USA.
The authors have control of all primary data, and agree to allow Graefe's Archive for Clinical and Experimental Ophthalmology to review the data upon request.
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Moshirfar, M., Chew, J., Werner, L. et al. Comparison of the effects of fourth-generation fluoroquinolones on corneal re-epithelialization in rabbit eyes. Graefes Arch Clin Exp Ophthalmol 246, 1455–1461 (2008). https://doi.org/10.1007/s00417-008-0893-5
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DOI: https://doi.org/10.1007/s00417-008-0893-5