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Abstract #79825 Published in IGR 20-2
Engineering and Development of Chitosan-Based Nanocoatings for Ocular Contact Lenses
Mehta P; Al-Kinani AA; Arshad MS; Singh N; van der Merwe SM; Chang MW; Alany RG; Ahmad ZJournal of Pharmaceutical Sciences 2019; 108: 1540-1551
This article reports on electrohydrodynamic atomization to engineer on-demand novel coatings for ocular contact lenses. A formulation approach was adopted to modulate the release of timolol maleate (TM) using chitosan and borneol. Polymers polyvinylpyrrolidone and poly (N-isopropylacrylamide) were utilized to encapsulate TM and were electrically atomized to produce optimized, stationary contact lens coatings. The particle and fiber diameter, thermal stability, material compatibility of the formed coatings, their in vitro release-modulating effect, and ocular tolerability were investigated. RESULTS: demonstrated highly stable nanomatrices with advantageous morphology and size. All formulations yielded coatings with high TM encapsulation (>88%) and excellent ocular biocompatibility. Coatings yielded biphasic and triphasic release, depending on composition. Kinetic modeling revealed a noticeable effect of chitosan; the higher the concentration, the more the release of TM because of chitosan swelling, with the mechanism changing from Fickian diffusion (1% w/v; n = 0.5) to non-Fickian (5% w/v, 0.45 The Leicester School of Pharmacy, De Montfort University, Leicester LE1 1BH, UK. 11.16 Vehicles, delivery systems, pharmacokinetics, formulation (Part of: 11 Medical treatment)Classification:
11.3.4 Betablocker (Part of: 11 Medical treatment > 11.3 Adrenergic drugs)