References
Query Results -- Details
MGI Accession ID: MGI:3772766
J Number: J:131073
Other Accession IDs:
Title: Axons of retinal ganglion cells are insulted in the optic nerve early in DBA/2J glaucoma.
Authors: Howell GR; Libby RT; Jakobs TC; Smith RS; Phalan FC; Barter JW; Barbay JM; Marchant JK; Mahesh N; Porciatti V; Whitmore AV; Masland RH; John SW
Journal: J Cell Biol
Volume: 179
Issue: 7
Date: 2007 Dec 31
Year: 2007
Pages: 1523-37
Review Status: Peer Reviewed
Abstract:
Here, we use a mouse model (DBA/2J) to readdress the location of insult(s) to retinal ganglion cells (RGCs) in glaucoma. We localize an early sign of axon damage to an astrocyte-rich region of the optic nerve just posterior to the retina, analogous to the lamina cribrosa. In this region, a network of astrocytes associates intimately with RGC axons. Using BAX-deficient DBA/2J mice, which retain all of their RGCs, we provide experimental evidence for an insult within or very close to the lamina in the optic nerve. We show that proximal axon segments attached to their cell bodies survive to the proximity of the lamina. In contrast, axon segments in the lamina and behind the eye degenerate. Finally, the Wld(s) allele, which is known to protect against insults to axons, strongly protects against DBA/2J glaucoma and preserves RGC activity as measured by pattern electroretinography. These experiments provide strong evidence for a local insult to axons in the optic nerve.
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