Implants as drug delivery devices for the treatment of eye diseases
The treatment of diseases affecting the posterior segment of the eye is limited by the difficulty in transporting effective doses of drugs to the vitreous, retina, and choroid. Topically applied drugs are poorly absorbed due to the low permeability of the external ocular tissues and tearing. The blood-retina barrier limits drug diffusion from the systemic blood to the posterior segment, thus high doses of drug are needed to maintain therapeutic levels. In addition, systemic side effects are common. Intraocular injections could be an alternative, but the fast flowing blood supply in this region, associated with rapid clearance rates, causes drug concentration to quickly fall below therapeutic levels. To obtain therapeutic levels over longer time periods, polymeric sustained-drug release systems implanted within the vitreous are being studied for the treatment of vitreoretinal disorders. These systems are prepared using different kinds of biodegradable or non-biodegradable polymers. This review aims to demonstrate the main characteristics of these drug delivery implants and their potential for clinical application.
Main Authors: | Silva,Gisele Rodrigues da, Fialho,Sílvia Ligório, Siqueira,Rubens Camargo, Jorge,Rodrigo, Cunha Júnior,Armando da Silva |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Universidade de São Paulo, Faculdade de Ciências Farmacêuticas
2010
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502010000300024 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Implantes biodegradáveis destinados à administração intra-ocular
by: Fialho,Sílvia Ligório, et al.
Published: (2003) -
Development and validation of a High Performance Liquid Chromatographic method for determination of etoposide in biodegradable polymeric implants
by: Solano,Ana Gabriela Reis, et al.
Published: (2012) -
Transdermal drug delivery treatment for overactive bladder
by: Dmochowski,Roger R., et al.
Published: (2006) -
Nanoparticulate drug delivery systems for the treatment of neglected tropical protozoan diseases
by: Volpedo,Greta, et al.
Published: (2019) -
Nanoencapsulation as strategy for enhancing drug delivery for infectious diseases treatment: an overview
by: Tellez Meneses, Jair Alexander
Published: (2022)