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1 General aspects (0)   1.1 Epidemiology (2)   1.2 Population genetics (5)   1.3 Pathogenesis (5)   1.4 Quality of life (2)   1.5 Glaucomas as cause of blindness (3)   1.6 Prevention and screening (3) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (2)   2.2 Cornea (6)   2.3 Sclera (1)   2.4 Anterior chamber angle (0)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (7)     2.5.2 Schlemms canal (1)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (1)     2.6.1 Production (1)     2.6.2 Outflow (3)       2.6.2.1 Trabecular meshwork (0)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (9)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (1)   2.9 Ciliary body (2)   2.10 Lens (1)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (3)   2.13 Retina and retinal nerve fibre layer (21)   2.14 Optic disc (17)   2.15 Optic nerve (3)   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 (0)   3.2 Electron microscopy (1)   3.3 Immunohistochemistry (14)   3.4 Molecular genetics (4)     3.4.1 Linkage studies (15)     3.4.2 Gene studies (1)   3.5 Molecular biology incl. 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    9.4.1 Steroid-induced glaucoma (3)     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 (1)       9.4.4.1 Exfoliation syndrome (8)       9.4.4.2 Glaucomas associated with cataracts (2)       9.4.4.3 Glaucomas associated with lens dislocation (0)       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 (3)       9.4.5.5 Other (0)     9.4.6 Glaucomas associated with inflammation, uveitis (3)     9.4.7 Glaucomas associated with ocular trauma (0)     9.4.8 Glaucomas associated 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Without tube implant (4)     12.8.2 With tube implant or other drainage devices (7)     12.8.3 Non-perforating (12)     12.8.4 Using laser (0)     12.8.5 Other (0)     12.8.10 Woundhealing antifibrosis (13)     12.8.11 Complications, endophthalmitis (8)   12.9 Trabeculotomy, goniotomy (0)   12.10 Cyclodestruction (5)   12.11 Cyclodialysis (3)   12.12 Cataract extraction (1)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (0)     12.12.3 Phacoemulsification (2)   12.14 Combined cataract extraction and glaucoma surgery (3)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (5)   12.15 Capsulotomy (0)   12.16 Vitrectomy (0)   12.17 Anesthesia (2)   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 (0) 15 Miscellaneous (1)

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Abstract #10440 Published in IGR 6-1

Endothelin-1 concentration is increased in the aqueous humour of patients with exfoliation syndrome

Koliakos GG; Konstas AG; Schlotzer-Schrehardt U; Hollo G; Mitova D; Kovatchev D; Maloutas S; Georgiadis N
British Journal of Ophthalmology 2004; 88: 523-527

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BACKGROUND/AIM: Endothelin 1 (ET-1) is considered the most potent vasoconstrictor in the body and the eye. This molecule may play a significant role in the pathobiology of exfoliation syndrome (XFS), a disorder characterized by a progressive iris vasculopathy. The purpose of this study was to investigate the concentration of ET-1 in the aqueous humour of cataract patients with and without XFS. METHODS: Aqueous humor samples were obtained from 25 consecutive eyes of 25 cataract patients with XFS and an equal number of age matched controls during phacoemulsification cataract surgery. None of the subjects had elevated intraocular pressure or glaucoma. ET-1 concentration in the aqueous was measured using a specific immunoassay with 100% immunoreactivity for ET-1. Total aqueous humor protein concentration was measured with a microplate Coomassie blue based method and was correlated with ET-1 concentration. RESULTS: Mean ET-1 concentration in the XFS aqueous samples (4.6 (SD 2.3) pg/ml) was significantly higher than that measured in the age matched control samples (2.8 (SD 1.71) pg/ml); (p = 0.006). Although total protein concentration was significantly elevated in the XFS samples (0.380 (SD 0.159) versus 0.279 (SD 0.144) mg/ml in the controls); (p = 0.023), no correlation was found between aqueous ET-1 and total protein concentration (p = 0.730). CONCLUSION: The increased concentration of ET-1 in the aqueous humor of XFS patients suggests that ET-1 may play a role in the pathobiology of XFS.

Dr. G.G. Koliakos, Department of Biological Chemistry, Aristotle University, Thessaloniki, Greece. kaliakos@med.auth.gr

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Classification:

9.4.4.1 Exfoliation syndrome (Part of: 9 Clinical forms of glaucomas > 9.4 Glaucomas associated with other ocular and systemic disorders > 9.4.4 Glaucomas associated with disorders of the lens)

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