Effects of ocular hypertension in the visual system of pigmented mice.
To study the effects of ocular hypertension (OHT) on the visual system of C57BL/6 pigmented mice, the limbal and episcleral veins of the left eye were laser photocoagulated (LP). LP increased the intraocular pressure during the first five days (d), reaching basal values at 7d. To investigate the eff...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2015-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4374934?pdf=render |
| _version_ | 1819079115902287872 |
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| author | Francisco J Valiente-Soriano Manuel Salinas-Navarro Manuel Jiménez-López Luis Alarcón-Martínez Arturo Ortín-Martínez José M Bernal-Garro Marcelino Avilés-Trigueros Marta Agudo-Barriuso María P Villegas-Pérez Manuel Vidal-Sanz |
| author_facet | Francisco J Valiente-Soriano Manuel Salinas-Navarro Manuel Jiménez-López Luis Alarcón-Martínez Arturo Ortín-Martínez José M Bernal-Garro Marcelino Avilés-Trigueros Marta Agudo-Barriuso María P Villegas-Pérez Manuel Vidal-Sanz |
| author_sort | Francisco J Valiente-Soriano |
| collection | DOAJ |
| description | To study the effects of ocular hypertension (OHT) on the visual system of C57BL/6 pigmented mice, the limbal and episcleral veins of the left eye were laser photocoagulated (LP). LP increased the intraocular pressure during the first five days (d), reaching basal values at 7d. To investigate the effect of OHT on the retinal ganglion cell (RGC) retrograde axonal transport, hydroxistilbamidine methanesulfonate (OHSt) was applied to both superior colliculi (SCi) and the retinas were dissected 2 or 4 weeks after LP. To determine RGC survival, these same retinas were immunoreacted against Brn3a (general RGC population) and melanopsin (intrinsically photosensitive RGCs, m+RGCs). To study whether OHT affected non-RGC neurons in the ganglion cell layer (GCL), RGCs were immunodetected with Brn3a and all GCL nuclei counterstained with DAPI in a group of animals examined 4 weeks post-LP. Innervation of the SCi was examined at 10 days, 8 or 14 weeks after LP with the orthogradely transported cholera toxin subunit-B. OHT resulted in diffuse and sectorial loss of OHSt+RGCs (50% at 2 weeks and 62% at 4 weeks) and in a comparable loss of Brn3a+RGCs at the same time intervals. m+RGCs decreased to 59% at 2 weeks and to 46% at 4 weeks, such loss was diffuse, did not parallel the sectorial loss of the general RGC population and was more severe in the superior-temporal retina. In the GCL, cell loss is selective for RGCs and does not affect other non-RGC neurons. The retinotectal innervation appeared significantly reduced at 10 days (55.7%) and did not progress further up to 14 weeks (46.6%). Thus, LP-induced OHT results in retrograde degeneration of RGCs and m+RGCs, as well as in the loss of CTB-labelled retinotectal terminals. |
| first_indexed | 2024-12-21T19:23:52Z |
| format | Article |
| id | doaj.art-18a0d70b32294c26a4bdcedf4365481c |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-21T19:23:52Z |
| publishDate | 2015-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-18a0d70b32294c26a4bdcedf4365481c2022-12-21T18:52:53ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-01103e012113410.1371/journal.pone.0121134Effects of ocular hypertension in the visual system of pigmented mice.Francisco J Valiente-SorianoManuel Salinas-NavarroManuel Jiménez-LópezLuis Alarcón-MartínezArturo Ortín-MartínezJosé M Bernal-GarroMarcelino Avilés-TriguerosMarta Agudo-BarriusoMaría P Villegas-PérezManuel Vidal-SanzTo study the effects of ocular hypertension (OHT) on the visual system of C57BL/6 pigmented mice, the limbal and episcleral veins of the left eye were laser photocoagulated (LP). LP increased the intraocular pressure during the first five days (d), reaching basal values at 7d. To investigate the effect of OHT on the retinal ganglion cell (RGC) retrograde axonal transport, hydroxistilbamidine methanesulfonate (OHSt) was applied to both superior colliculi (SCi) and the retinas were dissected 2 or 4 weeks after LP. To determine RGC survival, these same retinas were immunoreacted against Brn3a (general RGC population) and melanopsin (intrinsically photosensitive RGCs, m+RGCs). To study whether OHT affected non-RGC neurons in the ganglion cell layer (GCL), RGCs were immunodetected with Brn3a and all GCL nuclei counterstained with DAPI in a group of animals examined 4 weeks post-LP. Innervation of the SCi was examined at 10 days, 8 or 14 weeks after LP with the orthogradely transported cholera toxin subunit-B. OHT resulted in diffuse and sectorial loss of OHSt+RGCs (50% at 2 weeks and 62% at 4 weeks) and in a comparable loss of Brn3a+RGCs at the same time intervals. m+RGCs decreased to 59% at 2 weeks and to 46% at 4 weeks, such loss was diffuse, did not parallel the sectorial loss of the general RGC population and was more severe in the superior-temporal retina. In the GCL, cell loss is selective for RGCs and does not affect other non-RGC neurons. The retinotectal innervation appeared significantly reduced at 10 days (55.7%) and did not progress further up to 14 weeks (46.6%). Thus, LP-induced OHT results in retrograde degeneration of RGCs and m+RGCs, as well as in the loss of CTB-labelled retinotectal terminals.http://europepmc.org/articles/PMC4374934?pdf=render |
| spellingShingle | Francisco J Valiente-Soriano Manuel Salinas-Navarro Manuel Jiménez-López Luis Alarcón-Martínez Arturo Ortín-Martínez José M Bernal-Garro Marcelino Avilés-Trigueros Marta Agudo-Barriuso María P Villegas-Pérez Manuel Vidal-Sanz Effects of ocular hypertension in the visual system of pigmented mice. PLoS ONE |
| title | Effects of ocular hypertension in the visual system of pigmented mice. |
| title_full | Effects of ocular hypertension in the visual system of pigmented mice. |
| title_fullStr | Effects of ocular hypertension in the visual system of pigmented mice. |
| title_full_unstemmed | Effects of ocular hypertension in the visual system of pigmented mice. |
| title_short | Effects of ocular hypertension in the visual system of pigmented mice. |
| title_sort | effects of ocular hypertension in the visual system of pigmented mice |
| url | http://europepmc.org/articles/PMC4374934?pdf=render |
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