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1 General aspects (0)   1.1 Epidemiology (26)   1.2 Population genetics (0)   1.3 Pathogenesis (8)   1.4 Quality of life (10)   1.5 Glaucomas as cause of blindness (13)   1.6 Prevention and screening (7) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (4)   2.2 Cornea (30)   2.3 Sclera (8)   2.4 Anterior chamber angle (3)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (9)     2.5.2 Schlemms canal (0)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (1)     2.6.1 Production (2)     2.6.2 Outflow (0)       2.6.2.1 Trabecular meshwork (2)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (3)   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 (1)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (5)   2.13 Retina and retinal nerve fibre layer (27)   2.14 Optic disc (27)   2.15 Optic nerve (0)   2.16 Chiasma and retrochiasmal central nervous system (6)   2.17 Stem cells (3)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (1)   3.2 Electron microscopy (0)   3.3 Immunohistochemistry (2)   3.4 Molecular genetics (2)     3.4.1 Linkage studies (5)     3.4.2 Gene studies (29)   3.5 Molecular biology incl. 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Miscellaneous (32)

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Abstract #46740 Published in IGR 13-3

Intravitreal bevacizumab treatment for neovascular glaucoma: histopathological analysis of trabeculectomy specimens

Yoshida N; Hisatomi T; Ikeda Y; Kohno R-i; Murakami Y; Imaki H; Ueno A; Fujisawa K; Ishibashi T
Graefe's Archive for Clinical and Experimental Ophthalmology 2011;

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Background: Neovascular glaucoma (NVG) is a serious complication for patients with proliferative diabetic retinopathy (PDR). Bevacizumab is a full-length humanized monoclonal antibody that binds all isoforms of vascular endothelial growth factor (VEGF). Recently, encouraging results regarding the off-label use of intravitreal bevacizumab (IVB) for the treatment of NVG have been reported. We evaluated the histology of bevacizumab-treated trabeculectomy specimens to clarify IVB's biological effects on angle neovascularization. Methods: We retrospectively reviewed the charts of a consecutive series of 15 eyes of 13 patients who underwent trabeculectomy to treat NVG caused by PDR. In ten eyes of eight patients, 1.25 mg bevacizumab was injected intravitreally via the pars plana. Using light or electron microscopy, the surgically excised trabecular tissue was compared to that without IVB. Results: Light microscopy revealed decreased edema, fibrin deposition, inflammation and vascular congestion in the trabecular meshwork in specimens with IVB compared to those without IVB. Electron microscopy revealed endothelial cell degeneration in the bevacizumab-treated specimens. Conclusions: The biological effects on angle neovascularization after IVB may involve reduced vascular permeability, decreased inflammatory reaction, loss of vascular function, and endothelial cell degeneration.

Y. Ikeda. Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.

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Classification:

9.4.5.1 Neovascular glaucoma (Part of: 9 Clinical forms of glaucomas > 9.4 Glaucomas associated with other ocular and systemic disorders > 9.4.5 Glaucomas associated with disorders of the retina, choroid and vitreous)
11.15 Other drugs in relation to glaucoma (Part of: 11 Medical treatment)

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