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Activity of a melimine derived peptide Mel4 against Stenotrophomonas, Delftia, Elizabethkingia, Burkholderia and biocompatibility as a contact lens coating
- Source :
- Contact lensanterior eye : the journal of the British Contact Lens Association. 40(3)
- Publication Year :
- 2016
-
Abstract
- Purpose To determine the antimicrobial activity of the melimine derived peptide Mel4 against Delftia , Stenotrophomonas , Elizabethkingia , Burkholderia and to investigate biocompatibility of Mel4 as an antimicrobial coating on contact lenses in animals and humans. Methods In vitro antimicrobial activity of Mel4 was determined against the four Gram negative bacteria by investigating growth curves for 24h followed by viable counts to determine the minimum inhibitory concentration (MIC). Contact lenses were coated by covalently binding Mel4, characterized by amino acid analysis, and were investigated for changes in lens parameters. Safety of Mel-4 coated lenses were determined in a rabbit model of daily contralateral wear. A prospective, randomised, double-masked, contralateral, 1week daily wear human clinical trial was used to evaluate subjective responses and ocular physiology. Results Mel4 was active against all the bacteria tested (MIC 50 ranged from 31–1000μgml −1 ) and produced an antimicrobial surface on contact lenses. Mel4-coating resulted hydrophilic surface without any significant change in contact lens parameters, and showed no signs of cytotoxicity or ocular irritation during rabbit wear. During human clinical trial, there were no differences between Mel4 coated and uncoated contact lenses in lens performance indicators and ocular signs such as corneal fluorescein staining. Mel4 and control uncoated lenses had no differences in ocular symptoms during lens wear. Conclusion Mel4 has achieved antimicrobial activity against variety of Gram negative bacteria that are often resistant to the action of cationic peptides and have been implicated in contact lens related adverse events. Mel4-coated contact lenses were safe to wear.
- Subjects :
- 0301 basic medicine
Gram-negative bacteria
Biocompatibility
Burkholderia
Contact Lenses
030106 microbiology
Microbial Sensitivity Tests
Bacterial Adhesion
Eye Infections, Bacterial
law.invention
Microbiology
03 medical and health sciences
0302 clinical medicine
Coated Materials, Biocompatible
law
Materials Testing
Animals
Prospective Studies
biology
Chemistry
Burkholderia Infections
General Medicine
Antimicrobial
biology.organism_classification
eye diseases
Lens (optics)
Contact lens
Stenotrophomonas
Ophthalmology
Disease Models, Animal
Delftia
030221 ophthalmology & optometry
Equipment Contamination
Antimicrobial surface
Female
sense organs
Rabbits
Gram-Negative Bacterial Infections
Optometry
Antimicrobial Cationic Peptides
Subjects
Details
- ISSN :
- 14765411
- Volume :
- 40
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Contact lensanterior eye : the journal of the British Contact Lens Association
- Accession number :
- edsair.doi.dedup.....19aec63426b70ad2d533aaa655850657