Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/105333
Title: Comparative Analysis of Morphological and Release Profiles in Ocular Implants of Acetazolamide Prepared by Electrospinning
Authors: Morais, Mariana 
Coimbra, Patrícia 
Pina, Maria E. 
Keywords: ocular implants; electrospinning technique; glaucoma; sustained drug release; poly "-caprolactone; electrospun fibers
Issue Date: 15-Feb-2021
Publisher: MDPI
Serial title, monograph or event: Pharmaceutics
Volume: 13
Issue: 2
Abstract: The visual impairment that often leads to blindness causes a higher morbidity rate. The goal of this work is to create a novel biodegradable polymeric implant obtained from coaxial fibers containing the dispersed drug-acetazolamide-in order to achieve sustained drug release and increase patient compliance, which is of the highest importance. Firstly, during this work, uncoated implants were produced by electrospinning, and rolled in the shape of small cylinders that were composed of uniaxial and coaxial fibers with immobilized drug inside. The fibers were composed by PCL (poly ε-caprolactone) and Lutrol F127 (poly (oxyethylene-b-oxypropylene-b-oxyethylene)). The prepared implants exhibited a fast rate of drug release, which led to the preparation of new implants incorporating the same formulation but with an additional coating film prepared by solvent casting and comprising PCL and Lutrol F127 or PCL and Luwax EVA 3 ((poly (ethylene-co-vinyl acetate)). Implants were characterized and in vitro release profiles of acetazolamide were obtained in phosphate buffered saline (PBS) at 37 °C. The release profile of the acetazolamide from coated implant containing Luwax EVA 3 is considerably slower than what was observed in case of coated implants containing Lutrol F127, allowing a sustained release and an innovation relatively to other ocular drug delivery systems.
URI: https://hdl.handle.net/10316/105333
ISSN: 1999-4923
DOI: 10.3390/pharmaceutics13020260
Rights: openAccess
Appears in Collections:FFUC- Artigos em Revistas Internacionais
FCTUC Eng.Química - Artigos em Revistas Internacionais
I&D CIEPQPF - Artigos em Revistas Internacionais

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