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• W2000485501 abstract "Antibiotics in a corneal preservation solution probably have little effect during storage at 4 C, but are effective as the tissue is warmed. The tissue acts as a sponge, soaking up the antibiotic from the solution and releasing it into the eye, where the bactericidal effect is achieved. Currently, high concentrations of gentamicin (relative to the minimal inhibitory concentration) are used in the preserving solution for this purpose. Presumably, proportionately high concentrations of any proposed new antibiotic added to supplement the bactericidal effect of gentamicin, such as the vancomycin used in this study, would be required. However, neither the ability of donor tissue to tolerate high concentrations of vancomycin nor the stability of vancomycin at neutral pH in appropriate storage media has been documented. We evaluated the addition of vancomycin (100 μg/ml) to two corneal storage media that contained gentamicin in terms of stability of the antibiotic in solution and the effect on the endothelial cells of donor tissue stored for two weeks at 4 C. Vancomycin was stable in solution at neutral pH (7.2) during the five-month period of the study; the concentration exceeded 90 μg/ml for the first five weeks. The endothelial cells from donor tissue stored in the vancomycin-enriched media showed no notable differences from those stored in the same media without vancomycin in terms of cell shape, cell borders, cell swelling, and apical holes. The stability of vancomycin in storage and the absence of endothelial toxicity in vitro support the potential use of this antibiotic as a supplement to gentamicin for the prevention of endophthalmitis in patients receiving corneal transplants. Antibiotics in a corneal preservation solution probably have little effect during storage at 4 C, but are effective as the tissue is warmed. The tissue acts as a sponge, soaking up the antibiotic from the solution and releasing it into the eye, where the bactericidal effect is achieved. Currently, high concentrations of gentamicin (relative to the minimal inhibitory concentration) are used in the preserving solution for this purpose. Presumably, proportionately high concentrations of any proposed new antibiotic added to supplement the bactericidal effect of gentamicin, such as the vancomycin used in this study, would be required. However, neither the ability of donor tissue to tolerate high concentrations of vancomycin nor the stability of vancomycin at neutral pH in appropriate storage media has been documented. We evaluated the addition of vancomycin (100 μg/ml) to two corneal storage media that contained gentamicin in terms of stability of the antibiotic in solution and the effect on the endothelial cells of donor tissue stored for two weeks at 4 C. Vancomycin was stable in solution at neutral pH (7.2) during the five-month period of the study; the concentration exceeded 90 μg/ml for the first five weeks. The endothelial cells from donor tissue stored in the vancomycin-enriched media showed no notable differences from those stored in the same media without vancomycin in terms of cell shape, cell borders, cell swelling, and apical holes. The stability of vancomycin in storage and the absence of endothelial toxicity in vitro support the potential use of this antibiotic as a supplement to gentamicin for the prevention of endophthalmitis in patients receiving corneal transplants." @default.
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• W2000485501 date "1992-05-01" @default.
• W2000485501 modified "2023-09-26" @default.
• W2000485501 title "Vancomycin-enriched Corneal Storage Medium" @default.
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• W2000485501 doi "https://doi.org/10.1016/s0002-9394(14)74729-4" @default.
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