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Title: Etoposide-loaded poly(lactic-co-glycolic acid) intravitreal implants : In vitro and In vivo evaluation.
Authors: Solano, Ana Gabriela Reis
Pereira, Adriana de Fátima
Faria, Luiz Gustavo Amorim de
Fialho, Sílvia Ligório
Patricio, Patrícia Santiago de Oliveira
Cunha Júnior, Armando da Silva
Fulgêncio, Gustavo de Oliveira
Silva, Gisele Rodrigues da
Pianetti, Gerson Antônio
Keywords: Ocular drug delivery system
In vivo release
Issue Date: 2018
Citation: SOLANO, A. G. R. et al. Etoposide-loaded poly(lactic-co-glycolic acid) intravitreal implants : in vitro and In vivo evaluation. AAPS PharmSciTech, v. 19, n. 4, p. 1652–1661, maio 2018. Disponível em: <>. Acesso em: 25 fev. 2019.
Abstract: Etoposide-loaded poly(lactic-co-glycolic acid) implants were developed for intravitreal application. Implants were prepared by a solvent-casting method and characterized in terms of content uniformity, morphology, drug-polymer interaction, stability, and sterility. In vitro drug release was investigated and the implant degradation was monitored by the percent of mass loss. Implants were inserted into the vitreous cavity of rabbits’ eye and the in vivo etoposide release profile was determined. Clinical examination and the Hen Egg Test-Chorioallantoic Membrane (HET-CAM) method were performed to evaluate the implant tolerance. The original chemical structure of the etoposide was preserved after incorporation in the polymeric matrix, which the drug was dispersed uniformly. In vitro, implants promoted sustained release of the drug and approximately 57% of the etoposide was released in 50 days. In vivo, devices released approximately 63% of the loaded drug in 42 days. Ophthalmic examination and HET-CAM assay revealed no evidence of toxic effects of implants. These results tend to show that etoposide-loaded implants could be potentially useful as an intraocular etoposide delivery system in the future.
ISSN: 1530-9932
Appears in Collections:DEFAR - Artigos publicados em periódicos

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