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1 General aspects (0)   1.1 Epidemiology (4)   1.2 Population genetics (0)   1.3 Pathogenesis (9)   1.4 Quality of life (7)   1.5 Glaucomas as cause of blindness (7)   1.6 Prevention and screening (3) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (3)   2.2 Cornea (23)   2.3 Sclera (1)   2.4 Anterior chamber angle (7)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (18)     2.5.2 Schlemms canal (0)     2.5.3 Scleral outlet channels (1)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (0)     2.6.2 Outflow (0)       2.6.2.1 Trabecular meshwork (4)       2.6.2.2 Uveoscleral (1)     2.6.3 Compostion (8)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (3)   2.9 Ciliary body (2)   2.10 Lens (2)   2.11 Vitreous body (2)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (3)   2.13 Retina and retinal nerve fibre layer (43)   2.14 Optic disc (18)   2.15 Optic nerve (3)   2.16 Chiasma and retrochiasmal central nervous system (0)   2.17 Stem cells (0)   2.20 Other (1) 3 Laboratory methods (0)   3.1 Microscopy (1)   3.2 Electron microscopy (0)   3.3 Immunohistochemistry (7)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (0)     3.4.2 Gene studies (20)   3.5 Molecular biology incl. 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(12) 15 Miscellaneous (17)

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Abstract #20547 Published in IGR 10-1

Comparative efficacy of pilocarpine, timolol and latanoprost in experimental models of glaucoma

Gupta SK; Agarwal R; Galpalli ND; Srivastava S; Agrawal SS; Saxena R
Methods and Findings in Experimental and Clinical Pharmacology 2007; 29: 665-671

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Intraocular pressure (IOP)-lowering effects of investigational antiglaucoma drugs often need comparison with existing drugs, but detailed data showing comparative efficacy of antiglaucoma drugs with different mechanism of action has not been reported so far. This study was designed to establish baseline information of the IOP-lowering effect of three currently used antiglaucoma drugs in three experimental models in rabbits, so that they act as a benchmark for the efficacy evaluation of the future experimental antiglaucoma drugs. The IOP-lowering effect of single-drop application of pilocarpine, timolol and latanoprost was studied in normotensive, water loading and steroid-induced models of glaucoma in rabbits. The noncontact tonometer was used for the first time to estimate IOP in rabbits. The peak IOP-lowering effect of pilocarpine, timolol and latanoprost in normotensive rabbit eye was 18.23%, 20% and 22.56%, respectively. In water-loading model, the maximum protection against the rise in IOP was shown by latanoprost (40.27%), followed by timolol (31.39%) and pilocarpine (28.91%). In steroid-pretreated rabbit eyes, peak IOP-lowering effects of pilocarpine, timolol and latanoprost were 25.65%, 34.21% and 35.06%, respectively. Therefore, the latanoprost was found to be most effective in all three models followed by timolol and pilocarpine. The results of this study can be used for future preclinical investigations for the assessment of IOP-lowering activity of potential antiglaucoma drugs.

Dr. S.K. Gupta, Delhi Institute of Pharmaceutical Sciences and Research, Pushp Vihar, MB Road, New Delhi 110017, India. skgupta@icriindia.com

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Classification:

5.3 Other (Part of: 5 Experimental glaucoma; animal models)
11.2 Cholinergic drugs (Part of: 11 Medical treatment)
11.3.4 Betablocker (Part of: 11 Medical treatment > 11.3 Adrenergic drugs)
11.4 Prostaglandins (Part of: 11 Medical treatment)

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