Protein Aggregation in the Aging Retina
The age-related altered expression of neuron-related proteins as seen in other regions of the central nervous system is expected in the aging retina. Using immunohistochemical techniques, we characterized the distribution and aggregation of tau, βA4-amyloid, α-synuclein, and ubiquitin in human retin...
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creator | Leger, François Fernagut, Pierre-Olivier Canron, Marie-Hélène Léoni, Sandy Vital, Claude Tison, François Bezard, Erwan Vital, Anne |
description | The age-related altered expression of neuron-related proteins as seen in other regions of the central nervous system is expected in the aging retina. Using immunohistochemical techniques, we characterized the distribution and aggregation of tau, βA4-amyloid, α-synuclein, and ubiquitin in human retina obtained from 19 enucleated eyes of patients aged 49 to 87 years and correlated the findings with the ages. Using a phosphorylation-independent antibody, tau aggregates were observed within the cytoplasm of several photoreceptor cells, and there was a positive correlation between age and the number of tau-positive ganglionic cells. Tau deposits were immunonegative with a phosphorylation-dependent antibody. We did not observe βA4-amyloid in subretinal pigment epithelium deposits or in neuroepithelial layers. α-Synuclein and ubiquitin inclusions were found in the inner nuclear layer, and there was colocalization of these proteins. The proportion of patients displaying such α-synuclein and/or ubiquitin intracytoplasmic inclusions was significantly higher with aging. The presence of ubiquitin deposits within drusen was remarkable, but diffuse ubiquitin aggregates between the retinal pigment epithelium and Bruch membrane were also noticed. These results indicate that protein aggregation in the retina increases with aging and that tau, α-synuclein, and ubiquitin should be the subjects of future investigations. |
doi_str_mv | 10.1097/NEN.0b013e31820376cc |
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Using immunohistochemical techniques, we characterized the distribution and aggregation of tau, βA4-amyloid, α-synuclein, and ubiquitin in human retina obtained from 19 enucleated eyes of patients aged 49 to 87 years and correlated the findings with the ages. Using a phosphorylation-independent antibody, tau aggregates were observed within the cytoplasm of several photoreceptor cells, and there was a positive correlation between age and the number of tau-positive ganglionic cells. Tau deposits were immunonegative with a phosphorylation-dependent antibody. We did not observe βA4-amyloid in subretinal pigment epithelium deposits or in neuroepithelial layers. α-Synuclein and ubiquitin inclusions were found in the inner nuclear layer, and there was colocalization of these proteins. The proportion of patients displaying such α-synuclein and/or ubiquitin intracytoplasmic inclusions was significantly higher with aging. The presence of ubiquitin deposits within drusen was remarkable, but diffuse ubiquitin aggregates between the retinal pigment epithelium and Bruch membrane were also noticed. These results indicate that protein aggregation in the retina increases with aging and that tau, α-synuclein, and ubiquitin should be the subjects of future investigations.</description><identifier>ISSN: 0022-3069</identifier><identifier>EISSN: 1554-6578</identifier><identifier>DOI: 10.1097/NEN.0b013e31820376cc</identifier><identifier>PMID: 21157377</identifier><identifier>CODEN: JNENAD</identifier><language>eng</language><publisher>Hagerstown, MD: American Association of Neuropathologists, Inc</publisher><subject>Aged ; Aged, 80 and over ; Aging - metabolism ; Aging - pathology ; alpha-Synuclein - chemistry ; alpha-Synuclein - metabolism ; Biological and medical sciences ; Eye Proteins - chemistry ; Eye Proteins - metabolism ; Female ; Humans ; Injuries of the nervous system and the skull. Diseases due to physical agents ; Male ; Medical sciences ; Middle Aged ; Nerve Tissue Proteins - chemistry ; Nerve Tissue Proteins - metabolism ; Neurology ; Retina - chemistry ; Retina - metabolism ; Retina - pathology ; tau Proteins - chemistry ; tau Proteins - metabolism ; Traumas. 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Using immunohistochemical techniques, we characterized the distribution and aggregation of tau, βA4-amyloid, α-synuclein, and ubiquitin in human retina obtained from 19 enucleated eyes of patients aged 49 to 87 years and correlated the findings with the ages. Using a phosphorylation-independent antibody, tau aggregates were observed within the cytoplasm of several photoreceptor cells, and there was a positive correlation between age and the number of tau-positive ganglionic cells. Tau deposits were immunonegative with a phosphorylation-dependent antibody. We did not observe βA4-amyloid in subretinal pigment epithelium deposits or in neuroepithelial layers. α-Synuclein and ubiquitin inclusions were found in the inner nuclear layer, and there was colocalization of these proteins. The proportion of patients displaying such α-synuclein and/or ubiquitin intracytoplasmic inclusions was significantly higher with aging. The presence of ubiquitin deposits within drusen was remarkable, but diffuse ubiquitin aggregates between the retinal pigment epithelium and Bruch membrane were also noticed. These results indicate that protein aggregation in the retina increases with aging and that tau, α-synuclein, and ubiquitin should be the subjects of future investigations.</description><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Aging - metabolism</subject><subject>Aging - pathology</subject><subject>alpha-Synuclein - chemistry</subject><subject>alpha-Synuclein - metabolism</subject><subject>Biological and medical sciences</subject><subject>Eye Proteins - chemistry</subject><subject>Eye Proteins - metabolism</subject><subject>Female</subject><subject>Humans</subject><subject>Injuries of the nervous system and the skull. Diseases due to physical agents</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Middle Aged</subject><subject>Nerve Tissue Proteins - chemistry</subject><subject>Nerve Tissue Proteins - metabolism</subject><subject>Neurology</subject><subject>Retina - chemistry</subject><subject>Retina - metabolism</subject><subject>Retina - pathology</subject><subject>tau Proteins - chemistry</subject><subject>tau Proteins - metabolism</subject><subject>Traumas. 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Diseases due to physical agents</topic><topic>Male</topic><topic>Medical sciences</topic><topic>Middle Aged</topic><topic>Nerve Tissue Proteins - chemistry</topic><topic>Nerve Tissue Proteins - metabolism</topic><topic>Neurology</topic><topic>Retina - chemistry</topic><topic>Retina - metabolism</topic><topic>Retina - pathology</topic><topic>tau Proteins - chemistry</topic><topic>tau Proteins - metabolism</topic><topic>Traumas. 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Using immunohistochemical techniques, we characterized the distribution and aggregation of tau, βA4-amyloid, α-synuclein, and ubiquitin in human retina obtained from 19 enucleated eyes of patients aged 49 to 87 years and correlated the findings with the ages. Using a phosphorylation-independent antibody, tau aggregates were observed within the cytoplasm of several photoreceptor cells, and there was a positive correlation between age and the number of tau-positive ganglionic cells. Tau deposits were immunonegative with a phosphorylation-dependent antibody. We did not observe βA4-amyloid in subretinal pigment epithelium deposits or in neuroepithelial layers. α-Synuclein and ubiquitin inclusions were found in the inner nuclear layer, and there was colocalization of these proteins. The proportion of patients displaying such α-synuclein and/or ubiquitin intracytoplasmic inclusions was significantly higher with aging. The presence of ubiquitin deposits within drusen was remarkable, but diffuse ubiquitin aggregates between the retinal pigment epithelium and Bruch membrane were also noticed. These results indicate that protein aggregation in the retina increases with aging and that tau, α-synuclein, and ubiquitin should be the subjects of future investigations.</abstract><cop>Hagerstown, MD</cop><pub>American Association of Neuropathologists, Inc</pub><pmid>21157377</pmid><doi>10.1097/NEN.0b013e31820376cc</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Aged Aged, 80 and over Aging - metabolism Aging - pathology alpha-Synuclein - chemistry alpha-Synuclein - metabolism Biological and medical sciences Eye Proteins - chemistry Eye Proteins - metabolism Female Humans Injuries of the nervous system and the skull. Diseases due to physical agents Male Medical sciences Middle Aged Nerve Tissue Proteins - chemistry Nerve Tissue Proteins - metabolism Neurology Retina - chemistry Retina - metabolism Retina - pathology tau Proteins - chemistry tau Proteins - metabolism Traumas. Diseases due to physical agents Ubiquitin - chemistry Ubiquitin - metabolism |
title | Protein Aggregation in the Aging Retina |
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