Efficacy of low-release-rate fluocinolone acetonide intravitreal implants to treat experimental uveitis.

Published

Journal Article

OBJECTIVE: To determine the efficacy of 0.5-mg and 0.1-mg sustained-release fluocinolone acetonide intravitreal implants to inhibit ocular inflammation in a rabbit model of severe uveitis. METHODS: The in vitro pharmacokinetic profile of both the 0.5-mg and 0.1-mg sustained-release fluocinolone intravitreal implants was determined during a 10-day period. A sustained-release fluocinolone acetonide intravitreal implant with a release rate of either 0.5 microg/d (n = 16) or 0.1 microg/d (n = 16) was implanted into the vitreous cavity of the right eye in albino rabbits after a subcutaneous injection of tuberculin antigen. Control animals (n = 14) received empty devices. Uveitis was induced with an intravitreal tuberculin antigen injection. A masked observer graded anterior chamber flare, anterior chamber cells, vitreous opacity, and inflammation on histologic sections. RESULTS: In vitro, the drug was released from both devices in a linear manner. In vivo, treated eyes were significantly less inflamed than untreated eyes (P< or =.02). Inflammation was suppressed to a greater degree with the 0.5-microg/d implant compared with the 0.1-microg/d implant. CONCLUSION: Sustained-release fluocinolone intravitreal implants suppress ocular inflammation in a rabbit model of severe uveitis. CLINICAL RELEVANCE: The efficacy demonstrated with the 0.1-microg/d implant provides the rationale for future human studies with lower-release-rate implants than are currently used in noninfectious uveitis clinical trials.

Full Text

Duke Authors

Cited Authors

  • Mruthyunjaya, P; Khalatbari, D; Yang, P; Stinnett, S; Tano, R; Ashton, P; Guo, H; Nazzaro, M; Jaffe, GJ

Published Date

  • July 2006

Published In

Volume / Issue

  • 124 / 7

Start / End Page

  • 1012 - 1018

PubMed ID

  • 16832025

Pubmed Central ID

  • 16832025

International Standard Serial Number (ISSN)

  • 0003-9950

Digital Object Identifier (DOI)

  • 10.1001/archopht.124.7.1012

Language

  • eng

Conference Location

  • United States