The visualisation of vitreous using surface modified poly(lactic-co-glycolic acid) microparticles

Chau, David Y.S.; Tint, Naing L.; Collighan, Russell J; Griffin, Martin; Dua, Harminder S.; Shakesheff, Kevin M. and Rose, Felicity R.A.J. (2010). The visualisation of vitreous using surface modified poly(lactic-co-glycolic acid) microparticles. British Journal of Ophthalmology, 94 (5), pp. 648-653.

Abstract

AIMS To demonstrate the potential use of in vitro poly(lactic-co-glycolic acid) (PLGA) microparticles in comparison with triamcinolone suspension to aid visualisation of vitreous during anterior and posterior vitrectomy. METHODS PLGA microparticles (diameter 10-60 microm) were fabricated using single and/or double emulsion technique(s) and used untreated or following the surface adsorption of a protein (transglutaminase). Particle size, shape, morphology and surface topography were assessed using scanning electron microscopy (SEM) and compared with a standard triamcinolone suspension. The efficacy of these microparticles to enhance visualisation of vitreous against the triamcinolone suspension was assessed using an in vitro set-up exploiting porcine vitreous. RESULTS Unmodified PLGA microparticles failed to adequately adhere to porcine vitreous and were readily washed out by irrigation. In contrast, modified transglutaminase-coated PLGA microparticles demonstrated a significant improvement in adhesiveness and were comparable to a triamcinolone suspension in their ability to enhance the visualisation of vitreous. This adhesive behaviour also demonstrated selectivity by not binding to the corneal endothelium. CONCLUSION The use of transglutaminase-modified biodegradable PLGA microparticles represents a novel method of visualising vitreous and aiding vitrectomy. This method may provide a distinct alternative for the visualisation of vitreous whilst eliminating the pharmacological effects of triamcinolone acetonide suspension.

Publication DOI: https://doi.org/10.1136/bjo.2009.163642
Divisions: Life & Health Sciences > Biosciences
Aston University (General)
Additional Information: This is an open-access article distributed under the terms of the Creative Commons Attribution Non-commercial License, which permits use, distribution, and reproduction in any medium, provided the original work is properly cited, the use is non commercial and is otherwise in compliance with the license. See: http://creativecommons.org/licenses/by-nc/2.0/ and http://creativecommons.org/licenses/by-nc/2.0/legalcode.
Uncontrolled Keywords: Adhesiveness,Glycolates,Humans,Lactic Acid,Microscopy, Electron, Scanning,Microspheres,Particle Size,Polyglycolic Acid,Triamcinolone,Vitrectomy,Vitreous Body
Published Date: 2010

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