期刊
COLLOIDS AND SURFACES B-BIOINTERFACES
卷 196, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfb.2020.111283
关键词
Modified contact lenses; Antimicrobial peptides; Antimicrobial contact lenses
资金
- Generalitat de Catalunya [TECSPR14-2-0044, 2017SGR1778]
- Spanish Ministry of Science, Innovation and Universities [CTQ2017-84998-P, CTQ2016-80645-R]
- Iberian Nanotechnology Laboratory (Portugal)
Commercial soft contact lenses were chemically modified to incorporate antibacterial properties. Contact lenses and especially soft contact lenses present a risk of eye microbial infection that eventually may lead to vision loss. This is a significant health issue given the large population of contact lenses wearers worldwide. In order to introduce bactericidal activity in hydrogel contact lenses, one short and one ultrashort antimicrobial peptides, LKKLLKLLKKLLKL (LK) and IRIRIRIR (IR), were selected. These peptides were anchored on the surface of contact lenses using a linker (1,4-butanediol diglycidyl ether) under mild conditions (room temperature, pH = 7.4). Physical and chemical properties of peptide-functionalized contact lenses were investigated through several analytical techniques including wettability, Raman confocal microscopy, fluorescence studies, refractometry and spectrophotometry. These studies demonstrated that contact lens modification occurred at the nanolevel (ng/lens). Bacterial cultures showed that peptide-functionalized contact lenses can drastically reduce bacterial adhesion and viability when exposed to Pseudomonas aeruginosa and Staphylococcus aureus. These systems offer the potential to minimise corneal bacterial infection and represent a suitable platform for future ophthalmic devices.
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