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1 General aspects (0)   1.1 Epidemiology (9)   1.2 Population genetics (1)   1.3 Pathogenesis (0)   1.4 Quality of life (11)   1.5 Glaucomas as cause of blindness (11)   1.6 Prevention and screening (13) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (2)   2.2 Cornea (14)   2.3 Sclera (8)   2.4 Anterior chamber angle (3)   2.5 Meshwork (0)     2.5.1 Trabecular meshwork (6)     2.5.2 Schlemms canal (3)     2.5.3 Scleral outlet channels (1)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (0)     2.6.2 Outflow (1)       2.6.2.1 Trabecular meshwork (3)       2.6.2.2 Uveoscleral (0)     2.6.3 Compostion (1)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (6)   2.9 Ciliary body (0)   2.10 Lens (0)   2.11 Vitreous body (1)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (2)   2.13 Retina and retinal nerve fibre layer (21)   2.14 Optic disc (20)   2.15 Optic nerve (4)   2.16 Chiasma and retrochiasmal central nervous system (4)   2.17 Stem cells (3)   2.20 Other (0) 3 Laboratory methods (0)   3.1 Microscopy (0)   3.2 Electron microscopy (1)   3.3 Immunohistochemistry (0)   3.4 Molecular genetics (0)     3.4.1 Linkage studies (1)     3.4.2 Gene studies (14)   3.5 Molecular biology incl. 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Miscellaneous (27)

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Abstract #66384 Published in IGR 17-3

Synapse Loss and Dendrite Remodeling in a Mouse Model of Glaucoma

Berry RH; Qu J; John SW; Howell GR; Jakobs TC
PLoS ONE 2015; 10: e0144341

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It has been hypothesized that synaptic pruning precedes retinal ganglion cell degeneration in glaucoma, causing early dysfunction to retinal ganglion cells. To begin to assess this, we studied the excitatory synaptic inputs to individual ganglion cells in normal mouse retinas and in retinas with ganglion cell degeneration from glaucoma (DBA/2J), or following an optic nerve crush. Excitatory synapses were labeled by AAV2-mediated transfection of ganglion cells with PSD-95-GFP. After both insults the linear density of synaptic inputs to ganglion cells decreased. In parallel, the dendritic arbors lost complexity. We did not observe any cells that had lost dendritic synaptic input while preserving a normal or near-normal morphology. Within the temporal limits of these observations, dendritic remodeling and synapse pruning thus appear to occur near-simultaneously.

Harvard Medical School, Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Boston, MA 02114, United States of America.

Full article

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Classification:

5.1 Rodent (Part of: 5 Experimental glaucoma; animal models)
11.8 Neuroprotection (Part of: 11 Medical treatment)

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