Oxidative stress damage circumscribed to the central temporal retinal pigment epithelium in early experimental non-exudative age-related macular degeneration
Abstract: Non-exudative age-related macular degeneration (NE-AMD) represents the leading cause of blindness in the elderly. The macular retinal pigment epithelium (RPE) lies in a high oxidative environment because its high metabolic demand, mitochondria concentration, reactive oxygen species levels,...
Guardado en:
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2019
|
| Materias: | |
| Acceso en línea: | https://repositorio.uca.edu.ar/handle/123456789/9159 |
| Aporte de: |
| id |
I33-R139123456789-9159 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Católica Argentina |
| institution_str |
I-33 |
| repository_str |
R-139 |
| collection |
Repositorio Institucional de la Universidad Católica Argentina (UCA) |
| language |
Inglés |
| topic |
CEGUERA ANTIOXIDANTES MITOCONDRIA DEGENERACION MACULAR ESTRES OXIDATIVO GANGLIOS ENVEJECIMIENTO |
| spellingShingle |
CEGUERA ANTIOXIDANTES MITOCONDRIA DEGENERACION MACULAR ESTRES OXIDATIVO GANGLIOS ENVEJECIMIENTO Dieguez, Hernán H. Romeo, Horacio Alaimo, Agustina González Fleitas, María F. Aranda, Marcos L. Rosenstein, Ruth E. Dorfman, Damián Oxidative stress damage circumscribed to the central temporal retinal pigment epithelium in early experimental non-exudative age-related macular degeneration |
| topic_facet |
CEGUERA ANTIOXIDANTES MITOCONDRIA DEGENERACION MACULAR ESTRES OXIDATIVO GANGLIOS ENVEJECIMIENTO |
| description |
Abstract: Non-exudative age-related macular degeneration (NE-AMD) represents the leading cause of blindness in the elderly. The macular retinal pigment epithelium (RPE) lies in a high oxidative environment because its high metabolic demand, mitochondria concentration, reactive oxygen species levels, and macular blood flow. It has been suggested that oxidative stress-induced damage to the RPE plays a key role in NE-AMD pathogenesis. The fact that the disease limits to the macular region raises the question as to why this area is particularly susceptible. We have developed a NE-AMD model induced by superior cervical ganglionectomy (SCGx) in C57BL/6J mice, which reproduces the disease hallmarks exclusively circumscribed to the temporal region of the RPE/outer retina. The aim of this work was analyzing RPE regional differences that could explain AMD localized susceptibility. Lower melanin content, thicker basal infoldings, higher mitochondrial mass, and higher levels of antioxidant enzymes, were found in the temporal RPE compared with the nasal region. Moreover, SCGx induced a decrease in the antioxidant system, and in mitochondria mass, as well as an increase in mitochondria superoxide, lipid peroxidation products, nuclear Nrf2 and heme oxygenase-1 levels, and in the occurrence of damaged mitochondria exclusively at the temporal RPE. These findings suggest that despite the well-known differences between the human and mouse retina, it might not be NE-AMD pathophysiology which conditions the localization of the disease, but the macular RPE histologic and metabolic specific attributes that make it more susceptible to choroid alterations leading initially to a localized RPE dysfunction/damage, and secondarily to macular degeneration. |
| format |
Artículo |
| author |
Dieguez, Hernán H. Romeo, Horacio Alaimo, Agustina González Fleitas, María F. Aranda, Marcos L. Rosenstein, Ruth E. Dorfman, Damián |
| author_facet |
Dieguez, Hernán H. Romeo, Horacio Alaimo, Agustina González Fleitas, María F. Aranda, Marcos L. Rosenstein, Ruth E. Dorfman, Damián |
| author_sort |
Dieguez, Hernán H. |
| title |
Oxidative stress damage circumscribed to the central temporal retinal pigment epithelium in early experimental non-exudative age-related macular degeneration |
| title_short |
Oxidative stress damage circumscribed to the central temporal retinal pigment epithelium in early experimental non-exudative age-related macular degeneration |
| title_full |
Oxidative stress damage circumscribed to the central temporal retinal pigment epithelium in early experimental non-exudative age-related macular degeneration |
| title_fullStr |
Oxidative stress damage circumscribed to the central temporal retinal pigment epithelium in early experimental non-exudative age-related macular degeneration |
| title_full_unstemmed |
Oxidative stress damage circumscribed to the central temporal retinal pigment epithelium in early experimental non-exudative age-related macular degeneration |
| title_sort |
oxidative stress damage circumscribed to the central temporal retinal pigment epithelium in early experimental non-exudative age-related macular degeneration |
| publisher |
Elsevier |
| publishDate |
2019 |
| url |
https://repositorio.uca.edu.ar/handle/123456789/9159 |
| work_keys_str_mv |
AT dieguezhernanh oxidativestressdamagecircumscribedtothecentraltemporalretinalpigmentepitheliuminearlyexperimentalnonexudativeagerelatedmaculardegeneration AT romeohoracio oxidativestressdamagecircumscribedtothecentraltemporalretinalpigmentepitheliuminearlyexperimentalnonexudativeagerelatedmaculardegeneration AT alaimoagustina oxidativestressdamagecircumscribedtothecentraltemporalretinalpigmentepitheliuminearlyexperimentalnonexudativeagerelatedmaculardegeneration AT gonzalezfleitasmariaf oxidativestressdamagecircumscribedtothecentraltemporalretinalpigmentepitheliuminearlyexperimentalnonexudativeagerelatedmaculardegeneration AT arandamarcosl oxidativestressdamagecircumscribedtothecentraltemporalretinalpigmentepitheliuminearlyexperimentalnonexudativeagerelatedmaculardegeneration AT rosensteinruthe oxidativestressdamagecircumscribedtothecentraltemporalretinalpigmentepitheliuminearlyexperimentalnonexudativeagerelatedmaculardegeneration AT dorfmandamian oxidativestressdamagecircumscribedtothecentraltemporalretinalpigmentepitheliuminearlyexperimentalnonexudativeagerelatedmaculardegeneration |
| bdutipo_str |
Repositorios |
| _version_ |
1764820529143873537 |