title: Gene expression of the repulsive guidance molecules/neogenin in the developing and mature mouse visual system: C57BL/6J vs. the glaucoma model DBA/2J.
abstract: We used in-situ hybridization to analyze the expression patterns of three known members (a, b and c) of the RGM ("repulsive guidance molecule") gene family and of the RGMa receptor neogenin in a glaucoma mouse model (DBA/2J strain) and the C57BL/6J strain, which served as a control. In order to understand the role of the RGMs and neogenin in glaucoma, we characterized their expression patterns in the developing and mature mouse retina and in the optic nerve. In all investigated stages from post-natal day (P) 0 to 15 months (M) RGMa, RGMb and neogenin expression was detected in the ganglion cell layer (GCL). From P10 to 15M, we found RGMa, RGMb and neogenin expression in the inner nuclear layer (INL) and the outer nuclear layer (ONL). In P10- and older mice, the expression patterns of RGMa and its receptor neogenin were similar, while that of RGMb differed from both. As expected, no specific retinal expression of RGMc was detected in any of the age groups investigated. C57BL/6J mice and DBA/2J mice displayed no differences in the expression pattern of RGMa, RGMb, RGMc and neogenin in the developing retina (gestational age 14.5 days (E14.5), P0 & P10). Interestingly, we found a higher expression of RGMa, RGMb and neogenin in the retinas of all glaucoma-affected mice than in the age-matched control strain. Furthermore, we detected a higher RGMa and RGMb expression in the optic nerves of glaucoma-affected DBA/2J-mice older than 11M than in C57BL/6J mice of the same age.
authors.affiliation: Section for Experimental Vitreoretinal Surgery, University Eye Hospital, Schleichstr. 12/1, 72076 Tübingen, Germany.
authors.forename: Sven
authors.initials: S
authors.lastname: Schnichels
authors.forename: Sabine
authors.initials: S
authors.lastname: Conrad
authors.forename: Katrin
authors.initials: K
authors.lastname: Warstat
authors.forename: Sigrid
authors.initials: S
authors.lastname: Henke-Fahle
authors.forename: Thomas
authors.initials: T
authors.lastname: Skutella
authors.forename: Ulrich
authors.initials: U
authors.lastname: Schraermeyer
authors.forename: Sylvie
authors.initials: S
authors.lastname: Julien
mesh_terms: D000367:Age Factors; D000818:Animals; D015816:Cell Adhesion Molecules, Neuronal; D058851:GPI-Linked Proteins; D018507:Gene Expression Regulation, Developmental; D005901:Glaucoma / Q000235:genetics* / Q000378:metabolism; D008565:Membrane Proteins / Q000235:genetics*; D051379:Mice; D008810:Mice, Inbred C57BL; D008811:Mice, Inbred DBA; D009124:Muscle Proteins / Q000235:genetics*; D009419:Nerve Tissue Proteins / Q000235:genetics*; D009900:Optic Nerve / Q000254:growth & development* / Q000378:metabolism; D012160:Retina / Q000254:growth & development* / Q000378:metabolism; D000071020:Hemochromatosis Protein
chemical_list: D015816:Cell Adhesion Molecules, Neuronal; D058851:GPI-Linked Proteins; D008565:Membrane Proteins; D009124:Muscle Proteins; D009419:Nerve Tissue Proteins; C483496:Rgma protein, mouse; C483497:Rgmb protein, mouse; C091279:neogenin; C504414:HJV protein, mouse; D000071020:Hemochromatosis Protein