Excitotoxicity and Glaucoma
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چکیده
منابع مشابه
Protection of neurons in the retinal ganglion cell layer against excitotoxicity by the N-acylethanolamine, N-linoleoylethanolamine
Retinal ganglion cell (RGC) death is a hallmark of neurodegenerative diseases and disease processes of the eye, including glaucoma. The protection of RGCs has been an important strategy for combating glaucoma, but little clinical success has been reported to date. One pathophysiological consequence of glaucoma is excessive extracellular glutamate subsequently leading to excitotoxicity in the re...
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Abnormal structure and function of astrocytes have been observed within the lamina cribrosa region of the optic nerve head (ONH) in glaucomatous neurodegeneration. Glutamate excitotoxicity-mediated mitochondrial alteration has been implicated in experimental glaucoma. However, the relationships among glutamate excitotoxicity, mitochondrial alteration and ONH astrocytes in the pathogenesis of gl...
متن کاملEffect of Memantine and Hespiridine on Monosodium Glutamate Induced Excitotoxicity in Rats
Background: Glutamate mediated excitotoxicity is proved to be involved in neurodegenerative diseases like ischemia, trauma, diabetic retinopathy, glaucoma, seizures. Development of specific glutamate antagonists favors a better treatment opportunity of these neurodegenerative diseases. Hesperidin, a proven antioxidant and memantine a known NMDA antagonist were selected and evaluated for their n...
متن کاملInvulnerability of retinal ganglion cells to NMDA excitotoxicity.
NMDA excitotoxicity has been proposed to mediate the death of retinal ganglion cells (RGCs) in glaucoma and ischemia. Here, we reexamine the effects of glutamate and NMDA on rat RGCs in vitro and in situ. We show that highly purified RGCs express NR1 and NR2 receptor subunits by Western blotting and immunostaining, and functional NMDA receptor channels by whole-cell patch-clamp recording. Never...
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Various cellular and molecular mechanisms that may lead to apoptotic cell death of retinal ganglion cells in glaucoma are discussed. These cellular mechanisms include neurotrophic factor deprivation, ischemia, glial cell activation, glutamate excitotoxicity, and abnormal immune response. Based on experimental and clinical evidence, the rationale for various neuroprotective strategies is described.
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