Amyloid-β deposits lead to retinal degeneration in a mouse model of Alzheimer disease

Allison Ning, Jing Cui, Eleanor To, Karen H Ashe, Joanne Matsubara

Research output: Contribution to journalArticle

151 Citations (Scopus)

Abstract

PURPOSE. To compare the temporal and spatial expression patterns of amyloid precursor protein (APP), amyloid-β deposits, inflammatory chemokines, and apoptosis in the retina of a mouse model of Alzheimer disease (AD). METHODS. Retinas of transgenic mice harboring a mutant presenilin (PS1) and a mutant APP gene were processed for TUNEL and immunohistochemistry with antibodies against APP, amyloid-β, monocyte chemotactic protein (MCP)-1, and F4/80. Comparisons were made between age groups and between transgenic and wild-type congeners. RESULTS. The neuroretina demonstrated age-dependent increases in APP in the ganglion cells (RGCs) and in neurons of the inner nuclear layer (INL). amyloid-β demonstrated significant age-dependent deposition in the nerve fiber layer (NFL). TUNEL-positive RGC increased in an age-dependent fashion and in transgenic compared with wild-type congeners. Concomitant overexpression of MCP-1 and intense immunoreactivity for F4/80 suggested that RGCs upregulate MCP-1 in response to amyloid-β. Activated microglia proliferated in response to MCP-1. In the outer retina, retinal pigment epithelium (RPE) demonstrated moderate age-dependent APP immunoreactivity, but nearby drusenlike deposits were not present. amyloid-β was observed in the choriocapillaris of the older animals. CONCLUSIONS. amyloid-β deposits accumulate with age in the retina of a transgenic mouse model of AD. The amyloid-β loads are accompanied by increased immunoreactivity for MCP-1, F4/80, and TUNEL-positive profiles in the RGC layer. The results suggest that amyloid-β causes neurodegeneration in the retina of the doubly mutant transgenic mouse model of AD.

Original languageEnglish (US)
Pages (from-to)5136-5143
Number of pages8
JournalInvestigative Ophthalmology and Visual Science
Volume49
Issue number11
DOIs
StatePublished - Nov 1 2008

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Retinal Degeneration
Amyloid Plaques
Amyloid
Alzheimer Disease
Chemokine CCL2
Amyloid beta-Protein Precursor
Retina
In Situ Nick-End Labeling
Transgenic Mice
Presenilins
Pseudogenes
Retinal Pigment Epithelium
Microglia
Mutant Proteins
Nerve Fibers
Chemokines
Ganglia
Up-Regulation
Age Groups
Immunohistochemistry

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Amyloid-β deposits lead to retinal degeneration in a mouse model of Alzheimer disease. / Ning, Allison; Cui, Jing; To, Eleanor; Ashe, Karen H; Matsubara, Joanne.

In: Investigative Ophthalmology and Visual Science, Vol. 49, No. 11, 01.11.2008, p. 5136-5143.

Research output: Contribution to journalArticle

Ning, Allison ; Cui, Jing ; To, Eleanor ; Ashe, Karen H ; Matsubara, Joanne. / Amyloid-β deposits lead to retinal degeneration in a mouse model of Alzheimer disease. In: Investigative Ophthalmology and Visual Science. 2008 ; Vol. 49, No. 11. pp. 5136-5143.
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abstract = "PURPOSE. To compare the temporal and spatial expression patterns of amyloid precursor protein (APP), amyloid-β deposits, inflammatory chemokines, and apoptosis in the retina of a mouse model of Alzheimer disease (AD). METHODS. Retinas of transgenic mice harboring a mutant presenilin (PS1) and a mutant APP gene were processed for TUNEL and immunohistochemistry with antibodies against APP, amyloid-β, monocyte chemotactic protein (MCP)-1, and F4/80. Comparisons were made between age groups and between transgenic and wild-type congeners. RESULTS. The neuroretina demonstrated age-dependent increases in APP in the ganglion cells (RGCs) and in neurons of the inner nuclear layer (INL). amyloid-β demonstrated significant age-dependent deposition in the nerve fiber layer (NFL). TUNEL-positive RGC increased in an age-dependent fashion and in transgenic compared with wild-type congeners. Concomitant overexpression of MCP-1 and intense immunoreactivity for F4/80 suggested that RGCs upregulate MCP-1 in response to amyloid-β. Activated microglia proliferated in response to MCP-1. In the outer retina, retinal pigment epithelium (RPE) demonstrated moderate age-dependent APP immunoreactivity, but nearby drusenlike deposits were not present. amyloid-β was observed in the choriocapillaris of the older animals. CONCLUSIONS. amyloid-β deposits accumulate with age in the retina of a transgenic mouse model of AD. The amyloid-β loads are accompanied by increased immunoreactivity for MCP-1, F4/80, and TUNEL-positive profiles in the RGC layer. The results suggest that amyloid-β causes neurodegeneration in the retina of the doubly mutant transgenic mouse model of AD.",
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N2 - PURPOSE. To compare the temporal and spatial expression patterns of amyloid precursor protein (APP), amyloid-β deposits, inflammatory chemokines, and apoptosis in the retina of a mouse model of Alzheimer disease (AD). METHODS. Retinas of transgenic mice harboring a mutant presenilin (PS1) and a mutant APP gene were processed for TUNEL and immunohistochemistry with antibodies against APP, amyloid-β, monocyte chemotactic protein (MCP)-1, and F4/80. Comparisons were made between age groups and between transgenic and wild-type congeners. RESULTS. The neuroretina demonstrated age-dependent increases in APP in the ganglion cells (RGCs) and in neurons of the inner nuclear layer (INL). amyloid-β demonstrated significant age-dependent deposition in the nerve fiber layer (NFL). TUNEL-positive RGC increased in an age-dependent fashion and in transgenic compared with wild-type congeners. Concomitant overexpression of MCP-1 and intense immunoreactivity for F4/80 suggested that RGCs upregulate MCP-1 in response to amyloid-β. Activated microglia proliferated in response to MCP-1. In the outer retina, retinal pigment epithelium (RPE) demonstrated moderate age-dependent APP immunoreactivity, but nearby drusenlike deposits were not present. amyloid-β was observed in the choriocapillaris of the older animals. CONCLUSIONS. amyloid-β deposits accumulate with age in the retina of a transgenic mouse model of AD. The amyloid-β loads are accompanied by increased immunoreactivity for MCP-1, F4/80, and TUNEL-positive profiles in the RGC layer. The results suggest that amyloid-β causes neurodegeneration in the retina of the doubly mutant transgenic mouse model of AD.

AB - PURPOSE. To compare the temporal and spatial expression patterns of amyloid precursor protein (APP), amyloid-β deposits, inflammatory chemokines, and apoptosis in the retina of a mouse model of Alzheimer disease (AD). METHODS. Retinas of transgenic mice harboring a mutant presenilin (PS1) and a mutant APP gene were processed for TUNEL and immunohistochemistry with antibodies against APP, amyloid-β, monocyte chemotactic protein (MCP)-1, and F4/80. Comparisons were made between age groups and between transgenic and wild-type congeners. RESULTS. The neuroretina demonstrated age-dependent increases in APP in the ganglion cells (RGCs) and in neurons of the inner nuclear layer (INL). amyloid-β demonstrated significant age-dependent deposition in the nerve fiber layer (NFL). TUNEL-positive RGC increased in an age-dependent fashion and in transgenic compared with wild-type congeners. Concomitant overexpression of MCP-1 and intense immunoreactivity for F4/80 suggested that RGCs upregulate MCP-1 in response to amyloid-β. Activated microglia proliferated in response to MCP-1. In the outer retina, retinal pigment epithelium (RPE) demonstrated moderate age-dependent APP immunoreactivity, but nearby drusenlike deposits were not present. amyloid-β was observed in the choriocapillaris of the older animals. CONCLUSIONS. amyloid-β deposits accumulate with age in the retina of a transgenic mouse model of AD. The amyloid-β loads are accompanied by increased immunoreactivity for MCP-1, F4/80, and TUNEL-positive profiles in the RGC layer. The results suggest that amyloid-β causes neurodegeneration in the retina of the doubly mutant transgenic mouse model of AD.

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