Quantitative and conformational characterization of lysozyme deposited on balafilcon and etafilcon contact lens materials

Michelle Senchyna, Lyndon Jones, Derek Louie, Chris May, Iain Forbes, Mary Ann Glasier

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

Abstract

Purpose. To determine whether differences in lysozyme deposition and/or activity exist on worn etafilcon and balafilcon contact lenses following care with a polyquaternium-based system (PQ) or a polyhexanide-based system (PHMB). Methods. Following acid-based deposit extraction, lysozyme concentration was determined via Western blotting and lysozyme activity was determined by a micrococcyl assay. Results. Lysozyme deposition on etafilcon lenses was greater following disinfection with the PHMB-based system (1551 ± 371 μg/lens vs 935 ± 271 μg/lens; p < 0.001). Deposition on balafilcon lenses was not influenced by the care regimen (10 ± 3.5 μg/lens vs 10 ± 5 μg/lens; p = 0.89). For both materials, the percentage of denatured lysozyme was greater when they were exposed to the PHMB-based system (28 vs 21%; p = 0.05 (etafilcon) and 57 vs 40%; p = 0.04 (balafilcon)). Conclusions. The quantity and conformation of lysozyme deposited on hydrogel contact lens materials is significantly influenced by both lens material and care regimen.

Original languageEnglish (US)
Pages (from-to)25-36
Number of pages12
JournalCurrent Eye Research
Volume28
Issue number1
DOIs
StatePublished - Jan 2004
Externally publishedYes

Keywords

  • Hydrogel contact lens
  • Lysozyme
  • Protein denaturation
  • Protein extraction
  • Western blotting

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Fingerprint

Dive into the research topics of 'Quantitative and conformational characterization of lysozyme deposited on balafilcon and etafilcon contact lens materials'. Together they form a unique fingerprint.

Cite this