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1 General aspects (0)   1.1 Epidemiology (3)   1.2 Population genetics (14)   1.3 Pathogenesis (3)   1.4 Quality of life (4)   1.5 Glaucomas as cause of blindness (4)   1.6 Prevention and screening (4) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (1)   2.2 Cornea (6)   2.3 Sclera (0)   2.4 Anterior chamber angle (0)   2.5 Meshwork (6)     2.5.1 Trabecular meshwork (0)     2.5.2 Schlemms canal (0)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (1)     2.6.1 Production (0)     2.6.2 Outflow (0)       2.6.2.1 Trabecular meshwork (0)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (0)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (1)   2.9 Ciliary body (1)   2.10 Lens (0)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (2)   2.13 Retina and retinal nerve fibre layer (7)   2.14 Optic disc (15)   2.15 Optic nerve (1)   2.16 Chiasma and retrochiasmal central nervous system (0)   2.17 Stem cells (0)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (1)   3.2 Electron microscopy (1)   3.3 Immunohistochemistry (1)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (0)     3.4.2 Gene studies (0)   3.5 Molecular biology incl. 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    9.4.1 Steroid-induced glaucoma (1)     9.4.2 Glaucomas associated with disorders of the cornea, conjunctiva, sclera (0)       9.4.2.1 Iridocorneal endothelial syndrome (ICE, incl. irisatrophy) (0)       9.4.2.2 Posterior polymorphous dystrophy (0)       9.4.2.3 Fuchs' endothelial dystrophy (0)       9.4.2.5 Other (0)     9.4.3 Glaucomas associated with disorders of the iris and ciliary body (0)       9.4.3.1 Pigmentary glaucoma (0)       9.4.3.5 Other (0)     9.4.4 Glaucomas associated with disorders of the lens (0)       9.4.4.1 Exfoliation syndrome (9)       9.4.4.2 Glaucomas associated with cataracts (1)       9.4.4.3 Glaucomas associated with lens dislocation (1)       9.4.4.5 Other (0)     9.4.5 Glaucomas associated with disorders of the retina, choroid and vitreous (1)       9.4.5.1 Neovascular glaucoma (4)       9.4.5.5 Other (0)     9.4.6 Glaucomas associated with inflammation, uveitis (5)     9.4.7 Glaucomas associated with ocular trauma (1)     9.4.8 Glaucomas associated 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Without tube implant (15)     12.8.2 With tube implant or other drainage devices (17)     12.8.3 Non-perforating (4)     12.8.4 Using laser (0)     12.8.5 Other (0)     12.8.10 Woundhealing antifibrosis (11)     12.8.11 Complications, endophthalmitis (7)   12.9 Trabeculotomy, goniotomy (1)   12.10 Cyclodestruction (8)   12.11 Cyclodialysis (1)   12.12 Cataract extraction (1)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (0)     12.12.3 Phacoemulsification (6)   12.14 Combined cataract extraction and glaucoma surgery (1)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (13)   12.15 Capsulotomy (0)   12.16 Vitrectomy (2)   12.17 Anesthesia (3)   12.20 Other (2) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (0)   13.2 Outcome (0)     13.2.1 IOP (0)     13.2.2 Visual field (0)       13.2.2.1 Progression (0)       13.2.2.2 Improvement (0)     13.2.3 Other (0) 14 Costing studies; pharmacoeconomics (1) 15 Miscellaneous (7)

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Abstract #15380 Published in IGR 1-3

The effect of hydroxyurea on rabbit subconjunctival fibroblast culture and use of hydroxyurea in rabbits after glaucoma filtration surgery

Yücel C; Baci G; Duranolu Y; Öztürk A; Aksu G; Lüleci G
Ophthalmologica 1999; 213: 311-319

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In an in vitro study, rabbit subconjunctival fibroblasts were cultured and the effects of an antineoplastic drug, hydroxyurea (HU), on fibroblast proliferation and fibroblast attachment was investigated. The effects of HU were compared with those of mitomycin C (MMC). Different concentrations of HU and MMC were added to culture medium. The HU doses which led to 50% of inhibition (ID₅₀) and the dose which led to about 90% of inhibition (subtoxic high dose, STHD) were determined to be 8 and 1000 μg/ml, respectively. ID₅₀ of MMC and its STHD which led to about 100% inhibition were found to be 0.01 and 1 μg/ml, respectively. Reversibility studies revealed that inhibition disappeared depending on the dose and incubation period of both HU and MMC. In an in vivo study, glaucoma filtration surgery (GFS) was performed in rabbits which were treated with HU (treatment group) and distilled water (control group). Tissue samples were taken from the subconjunctival area treated at 1 hour, and 1, 5 and 30 days postoperatively. The biopsy specimens were then placed in tissue culture media. Fibroblast outgrowth rates detected in the HU group were found to be significantly lower than those in the control group in the specimens taken at the end of the first hour. The difference was significant on culture days 9-15 in the biopsy specimens taken on day 1, while it was not significant in those taken on days 5 and 30.

Dr. C. Yücel, Department of Ophthalmology, Akdeniz University, Faculty of Medicine, Antalya; Turkey

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Classification:

4 Tissue culture of ocular cells
5 Experimental glaucoma; animal models
12.8.1 Without tube implant (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
12.8.10 Woundhealing antifibrosis (Part of: 12 Surgical treatment > 12.8 Filtering surgery)

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