advertisement
Abstract #46211 Published in IGR 13-2
Polymers and drugs suitable for the development of a drug delivery drainage system in glaucoma surgery
Lobler M; Sternberg K; Stachs O; Allemann R; Grabow N; Roock A; Kreiner CF; Streufert D; Neffe AT; Hanh BDJournal of Biomedical Materials Research - Part B Applied Biomaterials 2011; 97: 388-395
Implantation of a glaucoma drainage system is an appropriate therapeutic intervention in some glaucoma patients. However, one drawback with this approach is the fibrotic tissue response to the implant material, leading to reduced flow of aqueous liquid or complete blockage of the drainage system. As a basis for developing an aqueous shunt we report here investigations with poly(3-hydroxybutyrate) (P(3HB)) and poly(4-hydroxybutyrate) (P(4HB)) as polymer matrices and with paclitaxel (PTX) and triamcinolone acetonide (TA) as drugs that might, in combination, delay or prevent the process of fibrosis by reducing fibroblast activity. P(3HB) and P(4HB) were fabricated into test prototypes with 500 (mu)m outer and 200 (mu)m inner diameter and ~1 cm length. The antiproliferative agent PTX and the anti-inflammatory agent TA were incorporated into the polymer matrices and were released by diffusion. In vitro cell assays demonstrated that the polymers have the potential to reduce fibroblast viability, while TA showed differential inhibition of Tenon fibroblasts, but not cornea keratocytes. Implantation of polymer disks and prototype devices into rabbit eyes confirmed the good biocompatibility of the materials. The combined use of a poly(hydroxybutyrate) polymer with PTX or TA has the potential to reduce the fibrosis associated with conventional glaucoma drainage systems.
M. Lobler. Institute for Biomedical Engineering, University of Rostock, Friedrich-Barnewitz-Str. 4, D-18119 Rostock, Germany. Email: marian.loebler@uni-rostock.de
Classification:
12.8.2 With tube implant or other drainage devices (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
11.16 Vehicles, delivery systems, pharmacokinetics, formulation (Part of: 11 Medical treatment)
